Rapidbike rev limit problems?

[jw]

I installed a Rapidbike3 on my 2006 KR and have developed a problem that I have heard only once before.

When accelerating hard and shifting at the rev limit, sometimes I will hit the rev limiter while clutching before I back enough out of the throttle. Usually this is not a problem as the engine hits the rev limiter and when the shift is completely, the revs drop back down.

With the rapidbike, when this happens, the bike or the Rapidbike will cut ignition for 2-3 seconds and the bike will coast. Then after that time, ignition is restored and you can accelerate again.

Very disconcerting. And potentially dangerous on the track if someone is following and expecting you to keep accelerating.

I have emailed the US distributor of Rapidbike to ask if he knows the reason and more importantly the solution

Anyone here have this problem?

[Robert Foster]

Greetings,

As this is a safety issue please do not ride your bike!

We have dispatched a few emails to you.

We have never had this problem. Your sales point might not have programmed it properly.

Please respond to the emails sent. There are a few important questions that we posed to you!

We want to resolve this! We have sold ~480 K1200 Rapid Bike Units worldwide with no Rev limiter issues!

Best!

[jw]

Actually, I have only received the one email yesterday. But did get your phone call. Thank you very much.
The email I received today was in regards to the missing USB programming cable that I still have not received.

There's another gentleman in South Africa that reported a similar issue with his bike and the rapidbike; however, I would have thought that if this was a serious problem with all the bikes on dynos hitting the rev limiter that more people would have reported this.

Yes, I will send the unit back as soon as I can.

Thanks for the call.

BTW, the distributor has BEEN EXCELLENT. And I cannot compliment him more for his help in the matter. He has responded and initiated multiple emails to me to help resolve the issue of the missing software activation code, missing USB cable and this possible "problem" with the rev limiter. HP TUNING from Florida. Don Wingate. Great guy and probably the main reason I'm sticking with the rapidbike even though the PC3 is available and cheaper. You should thank him. I have.

[Robert Foster]

Greetings,

As revealed in your emails you have decided to not USE the Rapid Bike Lambda Emulator.

This Lambda Emulator is a necessary component and it comes with the Rapid Bike kit for the K bikes.

Additionally, you have informed us that BMW has not installed any flash upgrades to your 2006 BMW K MMU and that you hooked up an analogue data logger directly to the MMU.

This "Cutting Out"is not a fault of the Rapid Bike. I am at the 2008 EICMA show in Milan at this time and have discussed this with the Dimsport engineers. They concur. It must be installed as a complete kit for it to work.

Please call Lenny Pedersen who is our EE.

He will guide you thru the correct method of installing the Rapid Bike kit.

Best
Robert Foster

[jw]

The O2 emulator is not a part of the basic rapidbike computer but an accessory to assist smoothing out low rpm running as I understand it.

I will be willing to bet there are several people here running the rapidbike without the emulator just fine.

Regardless, the emulator works only in closed loop mode and has nothing to do with power cutoff at redline.

It worries me that you would suggest the two are related.

Also, I did not have the datalogger installed when the problem happened. I hooked the datalogger up afterwards to help tune the bike. The datalogger also has worked fine before the rapidbike install.

I believe the problem is the rev limit extender on the Rapidbike3. It was sent to me with the rev limit extended by 500 rpms. I have reset this and will retest this weekend.

Also since it is easy enough to just run with the emulator connected, I will also retest with this as well.

[Robert Foster]

Hello John,

The Rapid Bike Systems are designed to work perfectly on a Modified or Stock Bike with no alterations to the stock electronics.

You are having safety issues as reported in your posts and emails.

Additionally on the boards as "jw" and "jcw" and in these emails you expose that your bike has been modified. We thank you for this info.

Specifically, you have performed surgery to your electronic components and performed modifications to it. You have accessed the ignition circuitry with an aftermarket tachometer.

As I said, the Rapid Bike Systems are designed to work on a bike with no alterations to the electronics. Our product will not be of use to you unless you return you bike to BMW stock electronic status.

Had we have known this information, we would have never sold you the Rapid Bike kit.

Please return your Rapid Bike Kit to your selling point for a full refund.

Again, as we advised you, "DO NOT RIDE THE BIKE! REMOVE THE RAPID BIKE SYSTEM"

We would recommend that you consult a local professional and consider a racing ECU. This would work well for your application.

Best!

Lenny Pedersen
Rapid Bike USA

[jw]

So what you are saying is just because I installed an aftermarket tach, I cannot run the rapidbike system????

[edited by admin].

Rapidbike is probably a GOOD product. But the US distributor above is VERY POORLY educated about his own product and what it requires and what it does not.

1) The O2 emulator is NOT a basic component of the system. Again, I have already spoken to two people that run the rapidbike without it. And have no problems.

2) The rapidbike does NOT require the latest update to function properly. If that were the case, everyone that installed the unit prior to the availability of that upgrade would have had problems.

3) An aftermarket tachometer has NO bearing on the funtion of an aftermarket piggback computer. I am tied into the coil negative of ONE of the COP connectors. This is all AFTER the ouput of the rapidbike system.

Basically they sent me an email requesting me to list every modification I have on the bike. This was obviously to find some thing like the tach to BLAME instead of acknowledging a problem with the rev extender. It is VERY telling that RapidbikeUSA themselves do not have their own maps for the K1200 bikes other than the stock ones from the parent company in Italy.

Again, all I wanted to know was if anyone else had a problem with the power cutoff at redline. It is present ONLY when using the rev extender over the stock rev limit. That and I also wanted to get the programming cable they did not send to me with the original package. I still have not received this, nor do I think I ever will from them.

Funny thing is the problem is solved when I reset the Rapidbike to use the stock rev limiter. I obtained a programming cable from Don Wingate from HP tuning and he has been FANTASTIC! He is in Florida and can tune your bike as he has access to a dyno and the adequate experience. http://www.hptuningparts.com/

I plan to forward this information back to the parent company in Italy to see if they concur. In the meantime, I'll be tuning the bike with the functional rapidbike without the rev limit extender. And if my bike explodes, I'll have no one to blame but myself.

[Robert Foster]

Greetings jw or jaw,

I am sorry but you have a safety issue.

SAFETY IS IMPORTANT TO US!

As I said:

Additionally on the boards as "jw" and "jcw" and in these emails you expose that your bike has been modified. We thank you for this info.

Specifically, you have performed surgery to your electronic components and performed modifications to it. You have accessed the ignition circuitry with an aftermarket tachometer.

As I said, the Rapid Bike Systems are designed to work on a bike with no alterations to the electronics. Our product will not be of use to you unless you return you bike to BMW stock electronic status.

Had we have known this information, we would have never sold you the Rapid Bike kit.

Best!

[jw]

Really?

It's working fine with the rev limiter extender disabled, and I've started to tune the bike and have bounced off the rev limiter several times without the power cutoff anymore.

THE PROBLEM IS WITH THE REV LIMITER EXTENDER NOT MY TACHOMETER.

It's GOING to be an issue if more people purchase the unit. It's unfortunate that you refuse to acknowledge the problem with your product and hide behind the excuse that my bike is "MODIFIED."

Can't you see that it will eventually come back to haunt you?

And I never tried to hide the fact that my bike was modified. Exposed, you say? No, I'm not the one hiding things.

[Robert Foster]

Greetings John,

You have the right to your opinion, HOWEVER, you do not have the right to create your own facts.

Rapid Bike USA did not sell you this Rapid Bike Kit!

High Performance Tuning Parts Did! He is a great tuner and was hoodwinked by you!

When you tried to purchase one from Rapid Bike USA on 08.04.2008 we declined as your bike never had a flash upgrade and you described your project to us.

The Rapid Bike system is good for the application it is designed for. It is not for your project!

Take the refund!

Move on!

[jw]

Obviously, Mr. Foster is delusional.

I clearly posted Don Wingate's name and HP tuning in my second post above and never stated RapidbikeUSA sold me the unit. It's your own post that implied you sold me the unit. Secondly, I NEVER tried purchasing from him directly. Why would I, his price is full list. $100 more than what I paid.

Like I said don't trust this guy.

AND YOU ARE NOT LISTENING---> The unit works fine with the rev limit extender disabled. I don't want or need or plan on taking the refund. I will tune this bike without your help and post up my results.

And I hoodwinked HP tuning???? I emailed and asked if I could purchase a RB3. I then asked him what the advantages he saw over the PC3 were. Then I paypaled him the money. HOODWINKED???? HOW EXACTLY????

[scrannel]

JW,

Sorry to sound lame, but just want to understand: Are you saying you suspect the Rev Limit Extender only is defective? Also, not having the product myself, I have no idea what disclaimers may or may not have come with it. However, it doesn't seem unreasonable for a company to protect itself from trying to support modified electrics. I know, you know your modification can't have caused the problem, but... can they test everyone's mods to see for themselves? I don't know, this is already starting to remind me of the fun we had on the Evil Twisted Throttle thread. Can't you just get a new Rev Limit Extender and just try it? Then let us know?

[jw]

That's what I'm trying to say.

The rapidbike works fine with the rev limit extender turned off. It is part of the Rapidbike3 computer. I have been happily tuning, albeit cold as hell, since turning it off.

My post was just to ask if anyone else had problems with the rev limit extender on the rapidbike. Period. End of story.

It was NOT to criticize RapidbikeUSA. It was not to ask for an apology. It was not to look for compensation. It was not looking for a refund. (This is where it fundamentally differs from the twistedthrottle thread)

Their subsequent handling of the situation is what I didn't like. And it's above to see. This is not second hand. The emails he sent to me are the same ones above with the exception of one email that wasn't too kind criticising my lack of tuning knowledge. I left that one out. I understand them trying to protect themselves, however, don't blame my tachometer modification for a compatibility problem between BMW and rapidbike. It falsely reassures other consumers that if their bike is "stock" or "modified" in a manner that Rapidbike is OK with then you will have no problems. That's untrue.

I AM NOT CRITICIZING the product (except the rev limit extender). If I really did not like it, I would have returned it for a refund. I still believe it is a superior product to the PC3 although at a significant price increase.

But the distributor instead of acknowledging a problem is blaming my tachometer.

I have already spoken to two people with the same rev limit extender problem. To be fair, it seems that our BMW motorcycles are very unique in that even two motorcycle of the same model, same options and nearly the same month of production are mapping differently with the rapidbike. It's VERY ODD. I have found out that a crankshaft position sensor replacement solved some of the problems with 2006-2007 bikes and rapidbike. I have also found out that certain software versions, such as SW version 12, DOES NOT seem to be compatible with the rapidbike.

This is information that Rapidbike should shared with the consumer. Not---> return your product, it will never work because 1) you didn't use the O2 emulator, 2) you have no software upgrades and 3) you have an aftermarket tachometer.

The problem is as I have stated above, you CANNOT CHOOSE your software update version. It's the newest version from the BMW dealer or nothing.

And despite what he says, MANY people (10's that I know of through emails alone) have had some problems with this unit. Mine was a fairly minor problem that I can work around (turn off the rev limit extender). Others more serious. It is probably why both Technoresearch AND Ken at evoluzione finally stopped selling these units although I do not know this for sure. I am NOT SAYING THIS IS A RAPIDBIKE PROBLEM. I'm saying it is likely an incompatibility between rapidbike and BMW's tempermental ecu.

Had RapidbikeUSA said, let us work through the possible potential causes for this incompatibilty so we can help others, as Don Wingate from HPtuningparts offered, I would be as happy as a clam. In fact, right now, I am very happy with the unit except for the single problem. Personally, I think it has been worth the $500 price tag. I would just buy it elsewhere if at all possible because of the experience I had with rapidbikeUSA.

That's all I have to say on the topic. I will not reply to this thread anymore as I have stated what I want to state. If someone wants the final word, they can have it. I will read and be silent.

On a side note, I would be happy to answer any questions regarding MY experiences with rapidbike via PM. Please feel free to contact me if you are interested in purchasing and have questions.

[Robert Foster]

Greetings All,

I saw a safety issue and misapplication of the Rapid Bike product.

jw was asked to call my EE Lenny Pedersen about this issue by phone and by emails. He declined to contact us at Rapid Bike USA.

There is no workaround here; JUST bashing a distributor for the impossible.

The Rapid Bike is for an electronically unaltered applications.

Best!

[jw]

Except for more lies...
I have no less than 20 emails to HP tuning and RapidbikeUSA in my outbox I can post if you'd like.

"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> Here's the right Track #‏ Yesterday
"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> RE: RB3 track number‏ Yesterday
"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> RB3 track number‏ Yesterday
"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> RB3 shipping‏ Yesterday
air******@msn.com RE: Bypass Plug‏ 11/09/08
air******@msn.com RE: USB and Fuel‏ 11/09/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: RB3 and USB‏ 11/09/08
fosterperformance@******* RE: K1200R RB3 Rev Limiter Problems‏ 11/09/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: ‏ 11/09/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> FW: K1200R RB3 Rev Limiter Problems‏ 11/09/08
fosterperformance@******* RE: K1200R RB3 Rev Limiter Problems‏ 11/09/08
fosterperformance@******* RE: K1200R RB3 Rev Limiter Problems‏ 11/09/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: ‏ 11/08/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: ‏ 11/08/08
fosterperformance@******** RE: K1200R RB3 Rev Limiter Problems‏ 11/07/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Hooked up and...‏ 11/07/08
HP Tuning Parts, LLC; fosterperformance@******* Rev limit extender problem- another thought‏ 11/07/08
HP Tuning Parts, LLC; fosterperformance@******* Hooked up and...‏ 11/07/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Shipping‏ 11/07/08
fosterperformance@*******; HP Tuning Parts, LLC RE: K1200R RB3 Rev Limiter Problems‏ 11/07/08
fosterperformance@*******; HP Tuning Parts, LLC RE: K1200R RB3 Rev Limiter Problems‏ 11/07/08
fosterperformance@******* RE: K1200R RB3 Rev Limiter Problems‏ 11/06/08
fosterperformance@******* RE: K1200R RB3 Rev Limiter Problems‏ 11/06/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Shipping‏ 11/06/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Here's the other person with the rev limit power problem‏ 11/06/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> Here's the other person with the rev limit power problem‏ 11/05/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Foster‏ 11/05/08
sales@rapidbikeusa.com Missing USB cable‏ 11/04/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Foster‏ 11/03/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Foster‏ 11/03/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: rev limiter problem‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: missing USB cable‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/30/08
"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> RE: RB3‏ 10/27/08
"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> RE: RB3‏ 10/27/08
fosterperformance@******* RE: K1200R RB3 Rev Limiter Problems‏ 11/06/08
fosterperformance@******* RE: K1200R RB3 Rev Limiter Problems‏ 11/06/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Shipping‏ 11/06/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Here's the other person with the rev limit power problem‏ 11/06/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> Here's the other person with the rev limit power problem‏ 11/05/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Foster‏ 11/05/08
sales@rapidbikeusa.com Missing USB cable‏ 11/04/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Foster‏ 11/03/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Foster‏ 11/03/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: rev limiter problem‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: missing USB cable‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/31/08
"HP Tuning Parts, LLC" <hptpllc@msn.com> RE: Tracking Info‏ 10/30/08
"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> RE: RB3‏ 10/27/08
"HP Tuning Parts, LLC" <hp-tuning@hotmail.com> RE: RB3‏ 10/27/08


There is more the rev limit emails start after 10/31. I made an honest effort.

[Robert Foster]

Greetings JW,

Stop the Bashing.

Deal with facts.

There is no reason that the Rapid Bike Rev Limiter Management can not work. Your Rapid Bike Module was programmed perfectly by Don Wingate. We have never had an issue with the BMS-K RPM limiter managment.

There is a safety issue that you report. It is obvious, that there is a reason why it is not working on your bike and it works on all the others sold worldwide.

----------------------------------------------------------

You have the right to your opinion, HOWEVER, you do not have the right to create your own facts.

The above statement was indicative of your citing false facts about the Rapid Bike functionality.

Depending on the BMW K1200 model and software upgrade we have 3 Rapid Bike Emulators and one Lambda Modulator. And yes these are necessary fur "Open Loop Tuning" at all RPMS and they are not optional!

We would again recommend that you consult a local professional for a diagnostic review on a dyno and find out what the real issue is. Or at least respond to our calls.<>>!

That is all I can say!

[SHIVA]

OK, so being in the Vendor's Area, this post is rightly being discussed between a vendor and one of our members. The only thing I need to ask you JW is to cool it with the bashing. Robert obviously cares enough to post multiple times and actually engage in a dialog with you. Thanks,

[Streaker]

As I was considering getting myself a Rapid, even though here in good old RSA, the prices are just over R8500 thanks to the exchange rates I have found this article intresting. Since the individual is almost certian it is the rev limit extender that is faulty, why can't just that part be replaced. Before you shoot me and say but the rev limit is controlled by the main ecu in the rapid, wouldn't it make sense to change the unit and see if the problem persists. If it does, you can always send me the used one and I will be happy to test it on my bike for the next three years and let you know the results. This whole thread bangs away at a single fault which could be fixed in under an hour if it is just the rev limit extender.

I must be honest, after reading the fact that it is only for stock bikes electronically, then I miss interpruted what the purpose of a rapid is. Can it be considered a piggyback system? If so then no thank you, I will keep the software version my Kr came with from the factory in Nov 2005. I thought it was a stand alone system that replaced not just intercepted the ecu controls but still used the standard injectors and piping.

I agree with Shiva, the manufacturer has tried to make a valid case and so has JW but personally I have not seen a single mention of first trying to fix the problem. I spend my money here in SA, then try return it, personal experiance tells me "If it doesn't work throw it in the dustbin!" The reason being try and claim a refund or a replacement part from someone halfway around the world. Apiggyback system for my six cylinder 328I outside cost me R2500, now R8500 for my 4 cylinder doesn't seem like a good deal if it is going to end up in the dustbin if it doesn't deliver. p.s: that includes the 17 dyno runs seting it up on the 328 and not just downloaded software.

[jw]

PM sent.

As requested, I will not longer bash in public.

[SHIVA]

JW, There is nothing wrong with having a heated discussion. All I said was, you can have one without the insults or bashing. Thanks, S

[jw]

Well, finished tuning WOT on the rapidbike unit. The one that I was told is dangerous and wouldn't ever work with my "overmodded" K-R. The map provided for the K1200R from rapidbike was as bad or worse at some rpms than the stock map, BTW. And I agree strongly that each bike should be mapped to their particular software version and model.



The dotted lines are with the piggback commputer. The solid lines, stock (for the most part).

The black lines are rpms vs time. You can see that the tuned map gets through the rev range faster.

The pink lines are the A/F ratios vs time. Compared to the stock line, the tuned line is much flatter near 12.8:1.

If you look where the rpm curve diverge the most, it is in that very lean area of the stock map. When the stock fueling gets back down to 12.8:1, the stock bike feels like it "takes off."

I am happy with the results and can recommend getting a Powercommander3 and a custom dyno tune.

[kismetcapitan]

ever seen a blown K1200R engine due to the user ignoring Rapidbike's advice? I have. I installed one here in Korea, and I was the go-between for getting the bike set up software-wise with Dimsport in Italy and the owner. There's a lot of control the unit gives you over the engine, and if they tell you to do something, you should do it. The K1200R owner decided he could do one better than DImsport, wanted more power than the provided map for his bike's setup, added some other stuff, and ended up with a dead engine.

A pity too; it is a gorgeous bike - full CF everywhere.

It's a bit of a pain to get in and out - finicky around the fuel rail (I found that removing the fuel rail is a lot easier than reaching behind it to clip/unclip the harness). But if they're telling you to do it and give you a FULL refund, do it before you kill your bike.

[jw]

Another goood reason to go with the Powercommander. It is fully compatible with an aftermarket tach.

But 2 things re your post.

1) I have 20 runs and counting without a hiccup or a problem. My bike is running smoother and stronger than ever. It's not a HUGE difference as the engine is very strong to begin with. But the bike is noticeably stronger. AND safer without the very lean A/F ratios in the midrange.
2) If you think the stock rapidbike map provided by dimsport is any good, then you really don't know what you are referring to. Sorry. I have a datalog of the dimsport map for my bike. Some places the A/F ratios are worse than stock. The main problem stems from different software versions having different fueling maps. So what might work for one version might be dangerous for another.

C'mon someonw with a 600hp+ Skyline must understand what I'm saying.

That being said, YES, I agree completely, an idiot can destroy an engine with the rapidbike easily. But there is NO REASON my bike or engine should be at risk. The direction I'm going with the fueling is safer. If you don't unserstand that then you won't understand why I have no worries about tuning this engine.

[Mach Schnell]

For the folks at home:

If you live in the USA, when you start modifying your ecu, your induction tract, or your exhaust system, your bike is no longer considered street legal. EPA regulations prohibit modifications that change emissions performance. Track use is another matter, and not regulated for emissions issues at this time.

If you live in the USA, the BMW importer appears to take the addition of any sort of engine control unit modification or augmentation as an issue that will void their warranty of the engine.

Note that in the exchange above, the folks representing Rapidbike were quite careful with their language. They were crafting the discussion in order to minimize any possible liability for either damage to the motorcycle, damage or injury to other riders, or injury to the rider. This is natural and appropriate for a vendor protecting their position and not a criticism.

Power Commander might be a better choice for track modifications in the USA because of their widespread availability, but PC mods still violate EPA regulations for street use and will void your warranty in the USA.

If your current K bike doesn't have enough power to suit you, start planning your trade to the new S1000RR, or maybe the new K1300S. And, of course, there's always the Hayabusa .

[jw]

Agreed. It specifically states in the owners manual that the addition of aftermarket fuel computers is VERBOTEN. Besides being not highway DOT legal.

But then again so are aftermarket exhausts that remove the catalytic converter, aftermarket turn signals that are not DOT legal, aftermarket wheels, non BMW motor oil and many other things.

If the bike does blow up, it is easy enough to remove the unit and return to stock if one is so inclined or so inept . But in my case, I have crossed the stock line eons ago and won't even think about approaching BMW for service work.

It's not a mod that is a FRINGE modification. Thousands of bikes run fuel computers. And run safely. But it's a personal decision. And one many people make. The aftermarket industry for cars and motorcycles is HUGE.

Besides, some of us cannot afford a new motorcycle...