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  1. Yamaha YFM350 Raptor/Warrior ('87-Present)
    I recently acquired a 1988 Yamaha warrior from a friend that was partially taken apart due to it making a knocking noise. I own another warrior so I am somewhat familiar with them and after venturing further into the project I have found that the valve adjustment bolt has backed out and damaged...
  2. Yamaha YFM660R Raptor (2001-2005)
    Hi Folks I had some trouble with my raptor dying randomly when idling after some hard-riding and sometimes it took about 20-30seconds for it to start after it died. Decided to adjust my valves after googling this form: intake valves was WAAYYY out but the exhaust valves was spot-on. :nod: The...
  3. Yamaha YFM350 Raptor/Warrior ('87-Present)
    Today I decided to make sure my valves where adjusted properly. They were way too tight. The exhaust valve was so tight that it never closed. So I adjusted them to specs in the manual. Now i have really bad knocking. When the piston is at the bottom of the cylinder the rocker arms can move up...
  4. Yamaha YFM350 Raptor/Warrior ('87-Present)
    hey guys I have a warrior and it seems to make a knocking sound somewhere in the engine. I already checked the timing chain and it looks replaced it made a goudge in the sides. And I have already checked the valves. Intake seems to move a little bit but not that much. Exhaust is tight. I don't...
  5. Yamaha YFM350 Raptor/Warrior ('87-Present)
    Have an 87 warrior and this damn thing has been giving me so much trouble. I finally thought I had it done, and I took it on a ride today, and it died righ after I started giving it some gas. It was fine if I cruised in 1st or 2nd but as soon as I started going in 3rd or 4th it's like sputter...
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