I have just purchased a 2002 Yamaha 660R Raptor. Living in Buffalo, snow is common among the winter months. Yamaha has added a reverse rev limiter on the 2002 versions. (I don't think that it was offered on the 2001 versions.) The problem with the rev. limiter is when you are stuck in snow or soft mud while in the reverse gear, as the bike begins to work its way out of the muck, the limiter kicks in bogging the motor down to a stall. The limiter may work for high speed reverse safety on dry firm ground. But when you need high revving reverse power to dig you out of the muck, you can't get it. My local dealership seems happy to try out their ideas on how to disable the limiter, but they admit that they have no info on the 2002 wiring of the Raptor. I would rather know that what I am doing is going to work and not affect other areas of the electrical system. The dealership does say that there are other owners of 2002 Raptors with the same concerns. I am hoping that you may have some info on how to disable the reverse limiter. This info would be greatly appreciated from all who own 2002 Raptors in snow filled buffalo this winter. Thankx jamin Jim Jr.

 

just not sure if it is in the same place as the 01 which is connected to the parking brake, if so here is what you can try: coming off the clutch there should be 2 sets of wires (not the cable the wires) the top one is the rev limiter the bottom one is the neutral (light and shift in gear control), follow the top wire behind the radiator to the connector, just unplug it, you dont have to short it out, see if that disables it

 

jaminthetrail; I hope that you find the way to bypass the rev. limiter on your 2002 Raptor, but I hate to see consumers going to all that hassle of doing something that the Yamaha Corp. screwed up!!!!! Slowing down an atv, this is a joke. For that reason, the word, "Clown" comes to mind when thinking of Yamaha. I'm not convinced that the 2002 version isn't slower than the 2001 edition. The term "closer gear ratio" means slower in my book. I currently have a 2001 Raptor without any problems, so maybe I'm the lucky one.

 

The first 3(or 2?) gears were geared lower/tighter for better low end performance but 4th & 5th were left alone for the same top end on 2002 models. Reverse was lowered also since it was too tall & required high revs to get out of tight places. However, I have heard/read nothing that indicates reverse had a rev limiter placed on it & if so, I agree that the emergency brake rev limiter could be the culprit. Either disco the connector or an easier way is to wrap a piece of wire around the emergency brake lever & post & it will never engage.

 

Maxima: Acording to my Raptor factory service manual the 5th gear ratio on the 01 is 0.904. The 02 supplement says the 5th gear ratio is also 0.904 they also have the same size rear sprocket & countershaft sprocket on 01s & 02s so the top speed will be the same. Also I don't see any thing wrong with a rev limit on reverse. I have never hit it my self (not enough snow in OK.) why would you want to go 20 mph in raverse? While JAMINTHETRAIL has A reason to disable it due to his riding conditions he must be careful on dry hard surfaces. Going fast in rev on a short wheelbase quad is just asking for a crash. Ever driven a fork lift (rear steering)? You always slow down before you turn or it will turn over. My raptor is not a 3 ton machine with most of the weight 6" from the ground. Go too fast in rev & turn the front wheel just a bit & your butt is on the ground with a raptor on top of you!

 

Thankx 'vraptor'

Your description of the wiring setup is on the money. The intent of the modification is not to blow anyone's doors off in reverse. But rather to let the atv dig it's self out of the snow and muck while in reverse. The funny thing about the limiter is once the tires start to spin, one can hit the limit point without muck punch on the throttle. Maybe the limit point should have been just a little higher? Do you think that there may be sensor? The limiter only happens in reverse, while the clutch is let out. If you pull in the clutch, (as if to shift) you can rev the snot out of it with no limiter interaction. How does it know if the clutch is in or out. Does the sensor on the clutch relay that signal. If so the disconection mentioned may be the ticket. Do you know if the parking brake limiter and the reverse limiter are on the same switch?

Any more help would be great.
Thankx again, Jamin Jim

 

I have an '02 Raptor with the parking break and clutch sensors disabled so I can run an aftermarket clutch perch and lever and the reverse rev limiter is still functioning [img]i/expressions/face-icon-small-sad.gif[/img]. It is wired through a different circuit. I agree that the limiter is too low (it shouldn't have one at all). Just another example of corporations trying to protect us from ouselves and themselves from litigation.

 

What makes the limiter work on the raptor is the speed sensor located on the rear clutch side of the motor. All you have to do is groundout the wire that goes to the reverse selector switch located just under the sprocket. There is two of them. If you unplug the right one the reverse light will come on. Grounding it out fools it so it doesnt know its in reverse. The only down fall is that after this is done the reverse light wont work any more. I have a toggle switch on it so I can disable the limiter when stuck but for normal riding I can leave the limiter operatable. I actualy know of a guy who makes a toggle switch kit that you just plug in and mount the switch. I have one one mine. If i remember right it only cost $9.99. His email is cc_performance@msn.com