yamaha xt 250 help splitting the case?

P

probiker

New member
i have a yamaha xt 250 and wanted to split the case i can only do that if get the whole case out of the frame but since this is a old bike the big axle bolt that holds the swingarm on is also holding the case on the axle will not come out it is impossible why?? once i do that i can repair my bike.
To correct things i have got the BOLT of the axle but i need to pull the axle out and it is impossible i have sprayed with wd 40 and banged it with a 10lb sledge hammer still wont come out
 
use pluss gas releasing oil...and a big hammer...it will come out in the end.
 
I am sure the Bolt that go through frame to your engine is stuck . and possible the sleeve bearings in swing arm are frozen to the bolt. you might need to heat up the swing arm and engine block. Not too hot that will weaked the metal. when you heated it up. Then use brass rod ( brass rod is bit smaller than the bolt size ( diameter) then use heavy hammer to pound the bolt out. It can be pain in the butt. If you cant do it. Have a motorcycle shop help you.
 
I am sure the Bolt that go through frame to your engine is stuck . and possible the sleeve bearings in swing arm are frozen to the bolt. you might need to heat up the swing arm and engine block. Not too hot that will weaked the metal. when you heated it up. Then use brass rod ( brass rod is bit smaller than the bolt size ( diameter) then use heavy hammer to pound the bolt out. It can be pain in the butt. If you cant do it. Have a motorcycle shop help you.
 
Be aware when beating the bolt with a sledge hammer, you're bending the frame on the opposite side of the bike.
If the bolt is welded inside of the engine cases from rust, when you hit the bolt it pushes the engine into the frame putting stress on it.

You have a few options.
Try to get it out with the heat & beat method.

If the bolt is rusted inside of the engine case - turn the bolt with a wrench to help it break free of the rust.
If the bolt turns freely, it's probably rusted to the collars.
Try to grab them (one at a time) with a pair of vice grip pliers and work the bolt free - use heat from a propane torch.

One of my bikes I had to strip it down to just the frame and swingarm.
Then put the frame in a 10 ton press.

Another bike, I cut the bolt with a hack saw.
There isn't much room to work - the blade had to be removed from the saw and took forever - it had to be done twice (once on each side of the engine).
Instead of using a hack saw blade if you have enough room, you can cut the bolt with a die grinder and "cut off wheel".
http://search.harborfreight.com/cpisearch/web/search.do?keyword=cut+off+wheel&Submit=Go

WD40 is crap and won't do a thing.
It's not even a lubricant - it says on the can "rust inhibitor"
I just prevents rust.
Go to an auto parts store and purchase rust remover.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=96431
Let it seap into the bolt hole and tap the bolt a few times to help it seap into any free space.
Repeat every hour until you can turn the bolt with a wrench.
 
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