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Lower end appart

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jbenjamin:
Hi mswyka,

I bought the sled in January of this year with just over 1800.0 miles on it for $400.00. I was told by the previous owner that he was riding it and it lost spark. I thought, well no problem I can fix that, but when I got it into my shop it had spark so I decided to  do a compression test and found 80 psi pto, and 110 on mag side. Obviously at that point it meant tear down.

Thanks for all of your experienced help, I have read a lot of good posts by you and others on this site.

JB

mswyka:
Just as a rule of thumb I would not normally expect crank issues at 1,800 miles.  None of our sleds came to us running.  We have had sleds come in with as few as 150 miles and with over 5,000 miles.  Generally, anything less than 2,500 miles was in good condition to rehabilitate.  And even then it was mostly the top end that needed help - and occasionally we would change a crank end bearing.  There are, of course, always exceptions.

jbenjamin:
One more question about the oil pump gear on the crankshaft. Is this gear supposed to be press fitted to the crankshaft? For how loose this gear is (spins freely) I can't see how this would drive the oil pump.

Thanks in advance.

JB

mswyka:
The gear on the crank should be tight to the crank.  If the one you have spins likey you will need a new gear.  I should have one if you need it.

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