help how do i time a 2008 250f up
  • pete dickinson
    Posts:7
    Joined:Thu Oct 13, 2011 3:54 pm
    help how do i time a 2008 250f up

    by pete dickinson » Thu Oct 13, 2011 4:18 pm

    iv jut shimed my valva up and i stupidly didn't mark the chaine and gear for reference on asemberly, i need to know how i know the cam is in the right place in reference to the other markers on the bike, thanks
  • Charlie C
    Posts:134
    Joined:Mon Dec 27, 2010 1:23 pm

    by Charlie C » Sat Oct 15, 2011 10:25 am

    Pull the big plug off on the clutch side of the engine. If you look in the hole, you'll see a dot on the gear inside the case and an arrow on the cover where you removed the cap. Line those to up together. On the camshaft gear, there are 2 slash marks on the gear that need to be ligned up with the sealing surface of the vavle cover. The intake valve lobes on the camshaft should be facing somewhat towards the carb, so pretty much back and up. All of these marks need to ligned up at the same time. When you have them all ligned up together, you can stick your finger in the timing chain tensioner hole and apply pressure to the timing chain guide to get a better idea as to where you're at. After you're confident that you have it timed correctly and have the tensioner back in, rotate the engine over a few times to make sure that everything is right where it needs to be. If it's off, you can tell easily because it's not going to be close. This is a real simple thing to do, but if you're off by a couple of teeth, it can do some serious damage if you try to kick it over.
  • pete dickinson
    Posts:7
    Joined:Thu Oct 13, 2011 3:54 pm

    by pete dickinson » Wed Oct 19, 2011 10:27 am

    thank you very much< i did as you sead and its all good :D starts loverly and went well raceing last sunday
    cheers again, Pete
  • Charlie C
    Posts:134
    Joined:Mon Dec 27, 2010 1:23 pm

    by Charlie C » Thu Oct 20, 2011 8:33 am

    Glad to help Pete, good luck racing!

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