ST50's first MAJOR problem :-(

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pitmaster

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well i think i may have killed it.......

- when its idling and you just blip the throttle once the engine makes a KNOCK sound!

- if you take it off idle and blip the throttle is wont knock, only when its idling,

- the lower you put the idle the louder and more times it will knock,

- but you have to have it idling really fast to make it stop knocking (way to fast to leave it like that)

its def coming from the engine, sounds very much like on the fly wheel side in the fly wheel region.

ONLY HAPPENS WHEN ENGINE IS HOT! its fine whilst cold,

i checked all bolts / mounts everything external like that, now iam stumped!

any of you engine guys have any thoughts??????
 
Last edited:
Maybe, take the casing off the engine and check the inside.
 

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