Loop 750 - Oil in swing arm tunnel

[Xlratr]

A friend of mine purchased a 750 loop frame earlier this year. He's just taken the swing arm off and found quite a lot of oil in there. Also up inside the rubber gaitor. What do you guys think about the source and reason? Gearbox or final drive?

John

[Antietam Classic Cycle]

Could be from the rear drive and/or from a leaking seal on the transmission output shaft.

How long are the rear shocks? If shorter than stock or a heavy load is carried, oil can "migrate" forward from the rear drive.

[Xlratr]

Could be from the rear drive and/or from a leaking seal on the transmission output shaft.

How long are the rear shocks? If shorter than stock or a heavy load is carried, oil can "migrate" forward from the rear drive.

The shocks look very much original equipment to me. Don't think they're too short.
John

[Antietam Classic Cycle]

The shocks look very much original equipment to me. Don't think they're too short.
John

Rear drive over filled could cause it too.

Some "old timers" actually put a little oil inside the boot during assembly. The idea was that a little oil in there would help the u-joint live longer.

[Xlratr]

Rear drive over filled could cause it too.

OK. I'll pass it on.
Thanks for the tips Charlie.
John