So I've had hella problems with my '98 300 xplorer since I took it to the local polaris repair guys. Paid to have the carb cleaned. Had to take it back 3 times to get it semi right. Anywho, it had a rough idle at start up so I adjusted the pilot screw to spec 1 1/2 turns out (they had it 4 turns out) and it cranks fine now. It puts out quite a bit of white smoke when cranked and when I put the throttle to it. Is this normal for a 2 stroke? Or should I be concerned about it running rich?

 

Are you loosing coolant by any chance,Better on the richer side for a 2 stroke I feel same w a 4 stroke.If you go to lean the bike runs hot an will blow up,run it too rich and it will blubber and can run hot too.But your safety margin is better on the richer side of things.Usually white smoke is coolant or transmission fluid,but the tranny an engine are seperate I believe.I have a 03 polaris tb 400 and I love it.

 

the 300 2 stroke is air cooled.

 

crank seals

 

are you premixing or is it injected oil? hows the compression? it wouldn't be smoking extremely bad, but some as it's a 2 stroke.

 

It's injected. What is compression? I've heard a lot about it but have no idea what it is/does. How do I check it?

 

Looked it up in my Haynes book and it explains checking 4 stroke but not 2 stroke compression. Is it the same?

 

Yep You're burning tranny oil

 

Would bad crankshaft seals allow transmission oil to get into the engine???
I do`nt know,just asking.
If the transmission is seperated from the engine with a primary belt I do`nt see how it could,if the trans. and engine are in the same box then there would still be a primary drive from the engine to the transmission seperated with a primary chain/belt housing so I still do not see how transmission oil could get into the engine via bad crankshaft seals.
If the chaain housing is wet then it could get primary chain housing lube into the engine due to bad crankshaft seals.

 

Yeah you're right, my bad. I know my Honda 2 stroke when crank seals go bad it sucks tranny oil, it has no chains or belts just gears.