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General Category => General Discussion => Topic started by: Xlratr on December 28, 2015, 03:56:39 PM

Title: Loop 750 - Oil in swing arm tunnel
Post by: Xlratr on December 28, 2015, 03:56:39 PM

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

Title: Re: Loop 750 - Oil in swing arm tunnel
Post by: Antietam Classic Cycle on December 28, 2015, 04:02:44 PM

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.

Title: Re: Loop 750 - Oil in swing arm tunnel
Post by: Xlratr on December 28, 2015, 04:06:48 PM

Quote from: Antietam Classic Cycle on December 28, 2015, 04:02:44 PM

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

Title: Re: Loop 750 - Oil in swing arm tunnel
Post by: Antietam Classic Cycle on December 28, 2015, 04:17:29 PM

Quote from: Xlratr on December 28, 2015, 04:06:48 PM

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.

Title: Re: Loop 750 - Oil in swing arm tunnel
Post by: Xlratr on December 28, 2015, 04:19:39 PM

Quote from: Antietam Classic Cycle on December 28, 2015, 04:17:29 PM

Rear drive over filled could cause it too.

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