Yamaha 250 Twin

[FPMXer]

How are you trying to turn over the engine? Is the kickstarter still attached or are you spinning the counter sprocket? Or did you try to remove the jugs and they won't come off?

[jjjcost]

im using the kick starter prob a better way tho.

[FPMXer]

I would try and pull the jugs as the base gasket is probably toast anyway and needs to be replaced.

[jjjcost]

ive tried to pull the jugs with 2 crow bars but no go lol. Im hopping its just a topend seizure from sitting cause it would suck if it blew up and seized from that.

[jj67]

Use Diesel fuel, trust me it works. I had a 1972 Yamaha HS1 twin (among others) that had been sitting for years with no heads, it was rusted solid! fill the tops with diesel fuel and let it sit, every couple of days try to turn it over a little until it turns all the way. It takes somes patience, but it will work.

JJ

[drag lt guy]

jj67 is right use Diesel Fuel.

[drag lt guy]

you should have Denny do some port work on this old motor to bring it to life.

[joe22883]

an no crow bars!! lol

[Blaster350]

you will have a fun project with the blaster. I did the 1971 R5-350 twin engine in a blaster a couple years ago. It was a blast.