New camshaft to O.S .28 for pull start

[From]

Hi guys and greetings from Finland!

I just bought O.S .28 engine for my Kyosho Mad Force Monster. Just have to get done some modifications before installing it.

Problem what I have is crankshaft. There is no pin for the pull start drive. There is only hole in that place and it’s not deep enough to install aftermarket pin. So I need to find new one..

Can you say which cranksaft fits this engine?

Attached images of new and old (GX21) engine.

 

[alfredwong2003]

If the first picture is for the .28, then it look correct.

 

[johnnydmd]

You need to find the O.S. crankshaft for that engine that is made for pullstart, and I'm not entirely sure it exists. Those O.S .28's are Truggy/Buggy engines that are made for bumpstarts, and after quick search, I didn't see anything.

 

[alfredwong2003]

Maybe you can try Kyosho 28 or OS vg30 crank shaft. At least you should check the bearing sizes.