Originally Posted by bluexile67

hey great input in this thread btw i feel he knows what he talks about.

just a quick question i have an old os xzb engine that i was using one of those plastic bearing covers which ran for quite a few litres of fuel.

it still has alot of compression.

and the engine high revs after wide open throttle.

so i checked it as i was running the engine without the plastic cover on it and did the soap bubble leak test it has air coming from the front bearing.

do i need to replace the bearing to have an airtight seal or would running the cover with enough grease fix it?

any reply is much appreciated. thankyou.