WHAT COULD HAVE CAUSE THIS

[stroking]

ITS a stock stroke H/R crank

 

drag ported

 

alky carbs

 

+12 timing

 

125psi

 

i never seen a crank bearing do this 

 

also what is the rod clearance suppose to be ? i got .035 on the side that the bearing went out on....clutch side.

 

 

 

 

 

 

 

 

[AKheathen]

with +12 timing, you are nutz for not running a trued/welded crank. how old is it? looks like it just failed. kinda hard to tell what is failure and what is collateral damage. if you plan on repairing that crank, you should check out that rod/bearing. at the least it needs to be tightened, but the heat marks say that it got extremely hot and is about to fail, unless it was from a rebuild. could be possible damage from lack of purging, or oil separation. just some things to think about....

[700vflash]

Wow! What did it do to the cases?

[BANSHEE HP]

cheap bearings... and the side rod clearance should be like .020-.024 or so yours is coming apart.

Edited October 18, 2010 by BANSHEE HP

[stroking]

everything else is good to go....no case damage,when i was riding it kept bogging when i switched gears so i shut it down and tore it apart.

 

the crank was VERY close to the case on this side too,so i think it was separating.

 

 

[Snopczynski]

I saw a bike with a wiseco crank do that. We had to replace the cases to get the thing to quit seizing.

[06specialedition]

Damn

[James-26]

My engine is all stock except for my 65mm wiseco's. I run a true and welded crank. I had a brand new 2004 crank pull apart just like yours. Banshee is known for this. Your bearing was just cheap I bet. I like the OEM bearings but there are better options for higher HP banshee engines. Like AKheathen said if you reuse that crank you need to have the bigend rod bearing checked or replaced. Hell if I was you id replace that entire side, rod and bearing.

[stroking]

im not going to use it again.

[stroking]

I saw a bike with a wiseco crank do that. We had to replace the cases to get the thing to quit seizing.

 

 

so you think the case may have something to do with it ?

[Snopczynski]

so you think the case may have something to do with it ?

possibly, you need to check the clearances around the bearings when installed in the case. If it is moving around, thats bad.

[700vflash]

I have been looking up the clearances because I am going to be putting in a different crank and will be doing some measuring of my own. The CLYMER shop book say's the connecting rod side clearance is 0.25-0.75, as long as the crankshaft assembly width is within spec. Is this correct?

[No Limit Powersports]

If that was oem bearing thats most likely your problem. The crank needs to be welded and a good bearing put on it.

 

Andy

M&M ATV

[No Limit Powersports]

I have been looking up the clearances because I am going to be putting in a different crank and will be doing some measuring of my own. The CLYMER shop book say's the connecting rod side clearance is 0.25-0.75, as long as the crankshaft assembly width is within spec. Is this correct?

 

LOL 1/4" to 3/4" of an inch i think you may have left out a 0 there.

[EvilBanshee]

by the time you get that thing fixed your better off buying a New one. Do it once and do it right as they say. Hot rods of vito's make nice cranks. not to crazy priced.