Crank seal

[sp1tekiller]

So I've found a Banshee for sale, in great condition really cheap. The seller says he believes it needs a crank seal.

 

This is what he says:

 

"It ran good last year but I think it needs a crank seal (builds up pressure in the gear case and oil leaks out the vent tube). This year when I pulled it out of the garage to take pictures, I couldn't get it to do anything other than bog when I hit the throttle."

 

Does this sound accurate? How much does it cost on average to have a crank seal done?

[dajogejr]

Yep...sounds about right.

If the right side crank seal is blown, it can pressurize the tranny fluid making it blow out a vent line.

 

If you do the work yourself, and if it doesn't need anything else...probably 50 -75 bucks in parts and fluids. Top end gaskets, side gasket, crank seals (might was replace both crank seals if you're gonna do it)...

 

If you're going to pay someone, like a dealer, probably 300 to 600 bucks.

 

Again, depending on if the top end is ok, within spec, crank and bearings on it check out.

Could be easy, could be a can of worms. but I'd say his description is pretty accurate.

[sp1tekiller]

Thanks for the reply. I'll probably end up taking a look at it anyway, check the compression. What is a decent amount of compression for this bike? I've been out of the Banshee loop for quite some time. Is there any accurate way to test the compression if I can't find my tester?

[Animalman294]

You can put a compression tester on it and it should be around 125-135 depending on the mods

[dajogejr]

A NEW motor at or near sea level will be 125ish.

A compression tester will not test for a bad crank seal.

Other than an actual good tester, no....no way to check compression.

[Hilarious]

You need a leakdown tester to check crank seals.

You can make one by going to the parts store.