1999 yz 400 new topend rebuild

1 reply to this topic
  • heavyhaul317

Posted September 29, 2012 - 02:37 PM


Well i had my 99 yz 400 topend rebuilt from piston to valves chain cams etc. I went for a ride today and it ran great. but towards the end of the day i started to hear some light valve tap noise. My mechanic told me that it is normal but want to get a second opinion. It starts hot which it never did before and has lots of power!! I love the bike and know its old but it kind f sticks with me. Can anyone help? Thanks

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  • heavyhaul317

Posted September 29, 2012 - 02:39 PM


Forgot to add i have about 4 hours on the motor.

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