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  1. Trx250r pro design cool head

    Engine and Transmission
    Im thinking about purchasing a new head and dome for my 86 250, the head i have now is shaved for high compression and has just over 190 psi. What are the pros of running a cool head compared to a stock head and dome? -Thank you!
  2. 250r Front and Rear Sprocket teeth differences

    Lounge
    I'm doing a new build on a 250r and I'm ordering a new chain and it comes with new sprockets. I can go up or down 12 to 14 on the front and i think 38 39 on the rear. Don't quote me there was about million combinations but one i did see the front was 14 and the rear was 36. Anyway I have the...
  3. Questions! Help Please!

    Engine and Transmission
    Well, i thought my quad was running perfect. But i was wrong. Took it to the coast and the top of head, there is a adapter were a coolent hose connects, i was riding it and i was torking it in 3rd, and the thing blew right off and coolant went everywhere. I have a BOG soon as i try to hit the...
  4. Please Help!

    Lounge
    From this picture u can see the problem i have on my hands. I would Really appreciate it if someone has a good deal on a usable top end. Im out of a job and can't afford to spend 300$ to rebuild it. Please And Thankyou! Tison.
  5. 1986 TRX250r With a 310kit HELP!

    Wanted
    From this picture u can see the problem i have on my hands. I would Really appreciate it if someone has a good deal on a usable top end. Im out of a job and can't afford to spend 300$ to rebuild it. Please And Thankyou! Tison.
  6. Compression before Break in.

    Engine and Transmission
    So I just put in a new 68mm wiseco with a fresh bore. I put the cylinder and head on and was only getting about 90lbs compression and could hear air leaking past the piston rings. Is this normal before breaking an engine in and what kind of compression should I get the rings seated? Thanks.
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