I just got a 01 Warrior and I'm having some issues. I tested it, ran great no problems at all. Loaded it on the truck got it home, took it off and now its acting like its hitting the Reverse Rev Limiter. I barely touch the throttle and it backfires and pops, yet it idles fine. Rebuilt and cleaned the carb, drained the fuel tank, put in new fuel, blew out all the lines. I can't think of anything but the limiter. My question..how do you disconnect the limiter either for good or to test and see if thats what the problem is? I'm sure there is a good aftermarket eliminator for this, but before I spend the $ I'd like to make sure this is the problem. Replaced the plug also, so thats not an issue either, and spark seems strong. I've heard of this as a fairly common problem with Raptors and Warriors, but I'm lost. Any help would be appreciated!

 

i have a friend that has a 03or04 warrior and had the same problem. on the parking brake their was like a safety thing and when he put his parking brake on it done the exact same thing.i would say when you hauled it home u applied the parking brake and the safety thingy got stuck,but thats what it is.

 

i would say it's the parking brake... or bad gas

 

Yeah, it's a common yamaha problem. On the clutch/parking brake perch there's 2 sensors, one for the clutch, and another one for the parking brake. When the one for the parking brake gets set it activates a 2,000 rpm rev limiter so you don't ride it around with the parking brake. It's a flawed system, and the switch can get stuck in the limiter position. Try wiggling that stuff around, and if that is the problem you can simply unplug the pb sensor from the wiring harness to bypass it (single white plastic plug under the hood).

 

I'll try that this afternoon. Thanks. Do they make a bypass for that or do I just leave it unplugged? And is that the rev limiter for reverse only, this is gonna be sorta a buddy bike, so I would hate to have someone miss a gear and overrev the hell out of it. Thanks.

 

no

it stops the big from reving when the parking brake is engaged.. so you don't f up the caliper

 

Yeah, don't worry about it messing anything up. The warrior's only rev limiter is that 2,000 rpm one for the parking brake, there is no limiter at all to prevent over-revving, but with a stock or mildly tuned engine the engine won't self destruct no matter how high it revs, the valves will float and act as a rev limiter if it gets too high.