Suzuki 2 Strokes

just picked up a 1971 t500 started it up today and it smoked the shed out after a short time the right side stoped but the left side bellowed smoke the wall of the shed at the back of bike has oil over it is this the crank oil seals gone ?

Certainly sounds like a possibility unfortunately.

Or maybe it could be something else entirely.

Alan H wrote:Or maybe it could be something else entirely.

+1

Could be the seals, but not necessarily. You won't really know till you take it out for a blast on the highway long enough to heat the pipes up enough to blow out any accumulated oil that is in the pipes and cylinders. Not the most environmentally correct thing to do perhaps, but it does keep the black flies and mosquitoes at bay this time of year .........................

If you're looking to narrow things down sync the carbs, and adjust the points if necessary...If you're still blowing a lot of smoke or you have a dark oily gas dripping from the exhaust, adjust the floats, or buy new ones. My point is make sure it has the best possible chance to run on both cylinders. Then clean out the oil pump and lines, make sure theres no built up sludge in the lines to ensure you're getting good oil flow. You'll have to check and adjust things before you can just assume new crank seals are required

Thanks for the help

If the bike has been sitting for a while you could have excess 2 stroke oil in the crank from the oil line check valve being stuck open. I just fired up my 1970 yesterday after a 3 year rest, the oil tank was empty, it had drained into the crank on one side. The bike did start and then managed to spew out the excess oil out the back of the exhaust. I ended up with a massive puddle of oil behind the bike, the oil was green as that was the colour of the oil that was in the tank. No signs of tranny oil. I need to take it for a spin to clean out all the crap and then fix the oil lines.

Fred

have been doing a few small jobs to the bike and after looking a some of the bikes on this site have decided on a full restoration and have the crank seals done. not knowing the history of the bike it will be something that i will not have to worry about. thanks steve

hey bloop it would have been easier to drain the cases on a 70 t500 rather than risk a bent rod from hydraulicing

Pete O'Dell wrote:hey bloop it would have been easier to drain the cases on a 70 t500 rather than risk a bent rod from hydraulicing

Yup...you're right, but I didn't realize that the oil had drained into the crankcase until I fired it up. Something to check for after it has sat for a few years. A fairly long ride has cleaned out the rest of the oil from the pipes.

when i removed the expansion chambers both had a lot of oil in them .motor is out of the frame just need the time to strip it down