It might have gotten hot at one point and fused itself to the shaft. If you had a little press you might be able to pop it loose by taken the small impeller cover off and pressing on the shaft! Worth a shot if you don't want to hit with a hammer!
crazycracker
I got a Marvin Shaw I had on my atc250r. It had +10 swingarm no link and I weigh 240. Had it recharged and replaced Schrader. Works great just need money!
$200 shipped
crazycracker
If you wanna run pump gas I recommend a serval. If race gas is ok a cub is prob better.
What? The cylinder has nothing to do with fuel used to run it!! Compression & Timing are the only things that affect the burn characteristics required to not detonate!
crazycracker