Smoke like crazy

Sauce440

New Member
Apr 5, 2013
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Michigan
We just replaced the crank seals for the second time and its still sucking in oil from gear case. Ive ran it down the road in 5th 6th gear for like 6 miles and still smokes and still oil dripping off exhaust flange. X(
 
was it leakdown tested to confirm replacing the seals actually worked ??
sometimes they leak between the collar and seal from the collar having a worn groove in it.

but your pipe may still be full of the previous oil ??

leakdown test it !!!!
 
no, I need to get one first. when we replaced the seals I took the pipe off and it was clean as a whistle,no oil.
 
LEAK TEST or your piston may end up like this (3 week old wiseco) spending $15 on a leak tester is cheaper than spending $120 on a piston
 
42:1 with Maxima Super M

Taken from the Maxima website.

Recommended Premix Ratios
50-80cc (24-32:1) | 125cc (24-40:1) | 250cc (24-40:1) | 500cc and up (32-60:1)


You are definatly starving your motor of oil, I would be changing to 32:1 for your motors sake.

With running so little oil in the premix you could be running gas rich and not allowing the motor to get to the operating temperature to allow the 2 stroke oil to be burnt off properly, resulting in it dripping from the exhaust.
 
Hairline crack in the cases? You need to leak test the motor to see where it is coming from. That's the only way to find it. Gear oil only has two passages to the combustion chamber, clutch side crank seal and cases.
 
What sprockets are you guys running? I just ordered a 15t sprocket.

We run a 12:40 combination with 18" rubber because we want lots of get up and go.

I presume you have a new chain and rear sprocket on order as well as the 15.

The reason I ask, is that if you fit a new sprocket with old chain and rear the whole set will be cactus within a few rides.
 
just got a new chain and back sprocket last year so I should be fine. the front one is still fairly new.

I hate to tell you , but it just dont work like that.

I have some sad news for you.

You should never mix old sprockets and chains with new or second hand ones.

They marry for life, and do not take kindly to another partnership.

A new sprocket will quickly wear/stretch or break an old chain.

A new chain on an old sprocket can be completly stuffed in a few miles.

An old chain on a new sprocket, the sprocket will have trouble meshing with the chain and will be stuffed after a few miles.

Rule of thumb, always replace the whole set, chain, front and back sprockets.

Ignore the rule and be prepared to either punch a hole in a case due to a broken chain, or have the chain wrap around a part of your anatomy at speed, very painful sometimes fatal.

 
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