Joined
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6 Posts
Hey, new to the forum and gotta say up front, I am a pure Honda man, have had 6 and everyone has been amazing...but I do love Yamaha's too. I have been lurking for a hour or two and gotta say that this forum will definitely be very useful to me.
Now that that is over, my friend has a 2001 Yamaha Raptor 660 and he needs me to adjust the valves, new bearings and other things. He said that it ran funny and that it seemed to have a lot more potential. The man that he bought it from said that he re-jetted it. As far as engine mods go, it has an HMF slip-on exhaust, Uni air-filter and airbox cover on. I do not know the jetting in it because I have not taken the carbs off yet. (Dual?? ooohh..nice)
So I took it for a spin and I noticed that it seemed to hit the rev limiter way too early, like a false rev limiter and that it popped pretty bad on decel. So...
What is the stock jetting on this ATV and where should he be around as far as main, pilot, needle and screw?
Thanks, Ian
Now that that is over, my friend has a 2001 Yamaha Raptor 660 and he needs me to adjust the valves, new bearings and other things. He said that it ran funny and that it seemed to have a lot more potential. The man that he bought it from said that he re-jetted it. As far as engine mods go, it has an HMF slip-on exhaust, Uni air-filter and airbox cover on. I do not know the jetting in it because I have not taken the carbs off yet. (Dual?? ooohh..nice)
So I took it for a spin and I noticed that it seemed to hit the rev limiter way too early, like a false rev limiter and that it popped pretty bad on decel. So...
What is the stock jetting on this ATV and where should he be around as far as main, pilot, needle and screw?
Thanks, Ian