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  1. 1988 Warrior 350 cylinder head

    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. 05 Raptor emits brownish exhaust fumes after valve adjustment

    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. Valve Problem!! Help!

    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. Warrior making noise somewhere in the engine

    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. Please help!!!!!

    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...