motor prob!

[Holeshot36]

Ok i have a '99 400ex have about 15 hours on topend rebuild which includes je416 11:1, hotcam stg.2, and mild port job. Under load plus light rpm it makes a loud clanking sound. I won't be able to tear the motor down till this weekend and hoping to race the gncc this month so i'm trying to get a idea on what this could be?-thanks

[Pappy]

is the sound coming from the top end? the bottom end...the clutch etc?

[Holeshot36]

the top end

[Pappy]

Originally posted by Holeshot36
hotcam stg.2,

not picking on them, but if that was my engine thats the first place id dig into:(

its also possible for the valves to be so misadjusted that they are making alot of chatter, or worn timing chain.

i wish the best for ya:(

[INFANTRY RACING]

yea...might just be valve chatter...


or a hot cam explodin:D