vibration at idle and sounds fine when rev

[Yamahaman03]

i just did a full rebuild and i added a wisco crank should i have to change the jets ? and it sounds like its vibrating when it idles but its fine i had a numura jug on it and piston detonated and i put the stock jug back on it its not loud but you can hear it

 

[Blaaster]

Unless you have changed the pipe or intake , there should be no need to re jet.

Wiesco cranks are known to suffer from runout problems, let's hope you did not get one way out of specs.

 

[Herpderplol]

Did you have a shop do the work for you or did you just slap a blaster piston into a cylinder?