Who here owns a fyz450??

[twgranger]

Can i get a list of people who own a yfz450. I have got a question for you.

[ATC crazy]

Whats the question? I dont own one, but my friend does, and I have plenty of seat time on it..

[twgranger]

when he is crusing real slow and then stab the throttle real quick does it bog and almost stall?

[honda250sx]

Leak jet problem. Buy the boyesen larger excellerater pump cover kit and should take care of the issue.

[twgranger]

Leak jet problem. Buy the boyesen larger excellerater pump cover kit and should take care of the issue.I went with a smaller leak jet #35 and the boyesen cover does nothing. I think the AP pump squirt is to long like 4 seconds or something.

[MRPoopie]

http://www.yfzcentral.com/ lots of information on the yfz

http://www.thumpertalk.com/ lots of general information

but as for that cover its bs it doesnt do squat

the fcr39 that comes on the yfz all have a slight bog i dont remeber the exact reason
but i know they do

http://www.thumpertalk.com/forum/showthread.php?t=240298

YOUR WELCOME! :beer

[twgranger]

yeah i read all that. still not sure what to do.

[MRPoopie]

did you try cleaning the carb and checking the fuel tank for dirt and fuel line
running higher octane gas might help aswell

[twgranger]

this thing is brand new. From what i have read on yfzcentral they all come like this from the factory to pass some cali emmisons.

[zombie_17]

My brother has an 06 model and it did the same thing. We took it to a mechanic and he rejetted it, it fixed the problem almost completly but when you go real slow, i mean real slow and stab it, it still bogs alitle

[MRPoopie]

well gut the pipe and rejet it and stuff good luck

@zombie did your bro have to jet richer or leaner?

[zombie_17]

Im almost positive it had to be jetted so more fuel was allowed through, im not sure which one that is though.

[twgranger]

My brother has an 06 model and it did the same thing. We took it to a mechanic and he rejetted it, it fixed the problem almost completly but when you go real slow, i mean real slow and stab it, it still bogs alitleThat is the only time mine does it too, when you are creaping along and then stabe the throttle real quick and it will bog. But if im crusing at normal speed it dont do it when i stab the throttle.

[zombie_17]

I just checked the reciept and it says the needle was raised one position and the pilot circuit was richened, but if it only happens to yours at that slow of a speed then it shouldnt be that big of a deal

[twgranger]

I just checked the reciept and it says the needle was raised one position and the pilot circuit was richened, but if it only happens to yours at that slow of a speed then it shouldnt be that big of a deal
Its not that real big of a deal it's just the point of the dealer selling these things running like that pisses me off.

[LonesomeTriZ]

Mine does not do that at all. It has stood up on my when I went from a slow put to a stab. Even in sand it came alive with out bogging.