Topic: T500 suckin oil

[johnyvilla]

I rebuilt my 70' Suzuki T500s motor a few years ago without fitting new rubber seals within. She ran great for two years, but is now smoking entirely to much. Apparently, one can barely see the road riding behind me at WOT. Also, for the first time my crankcase oil level regularly drops after long rides. So I assume its not the 2stroke injection pump because I'm loosing crankcase oil. But can I also assume the rubber oil rings that seat on eather side of the crank are to blame? Like I said I haven't been in there for a few years and I cant remember what kind of internal seals exist. Is anyone familiar with these engines? thanks

[333]

I'm not that familiar with the T500, but if it's a 2-stroke, it doesn't have crankcase oil.  It has transmission oil.  And if it is losing oil when ridden, and it's not leaking on to the ground, I would have to guess a seal between the tranny and engine case has gone bad.  Are you sure those o-rings aren't true oil seals?  They do go bad sometimes.

[mark]

Had to dig a bit but found the old Clymer book. The pix show an oil seal behind the main bearing on the clutch side. The other possibility would be the sealer on the case halves between the crankcase and transmission. Crankcase vacuum on the compression stroke could pull trans. oil through a leak at either place. I do not see a  fix for either without scattering it again. Sorry.

Hope that helps a bit.

Happy trails.

[johnyvilla]

Thanks guys that helps.

[bryanj]

Crank seals go with age, change bothe outers, if the centre is rubber as well thats a crank split (specialist) job