Massive oil leak, CB72

CharlesM · Post by **CharlesM** » Wed May 27, 2015 4:02 pm

Picture of pin

G-Man · Post by **G-Man** » Wed May 27, 2015 4:08 pm

Bronze bushes are used in the gearbox.

G

CharlesM wrote:So had it more apart and we have massive amounts of brass deposits in the sludge trap. Everything looked to be ok and it sounded fine when it was running.

Where are the brass bushes?

Regarding the original leak the small o-ring inside the mainshaft was slightly damaged and worn and the oil guide pin (pic attached) was broken. I'll replace the o-ring and the clutch push rod oil seal (think its called o-ring 8216) anyway. But what is the purpose of that pin? I'll get myself a manual soon. I expect the engine is coming out, although it clearly had been recently split and the cam chain is certainly new.

G-Man · Post by **G-Man** » Wed May 27, 2015 4:10 pm

The pin retains a spring inside the part.

G

CharlesM wrote:Picture of pin

CharlesM · Post by **CharlesM** » Wed May 27, 2015 4:13 pm

Thank you. Looks like I'll have the earbox out then!

Spring is in there fine so maybe just the push rod o-ring. It should be an energised seal.