vibration

[H,POOL GADGE]

p2 lump with mild tune barrel and piston running sweet as a nut, But! what cause's the vibration just before it hits it's power band, just before 50 and slightly after in this case, it,s not a problem but what causes it? :wtf:

[gaz_powell]

mines the same and i have autisa cylinder with mild tune, ported casings, cut crank, disc flywheel, SIP performer LH exhaust

i`ve looked at everything - engine/shocker mounts etc

just change dthe flywheel to a disc one with the starter ring and lip removed to fit early casings - flywheel was balanced and a slight difference noticed

i think next strip will include the crank balanced

[H,POOL GADGE]

cheers Gaz, i was thinking crank like, but with it been a mazza crank supposed to be balanced and that! Ye was just wondering, i can live with it, knowledge is power?

[gaz_powell]

i`m in the same boat - just living with it until next rebuild i`ll get the crank checked out

i think wear in the headset bottom cast were the throttle and gear changes tubes might contribute aswell -i keep thinking of boring them out and putting nylon liner in which could be changed when required or maybe i`m thinking to much !