I have a Hyper .21 8 port w/o pullstart and want to turn it in to a pull start.
What do I need?
thanks

Pullstart assembly, one way bearing and shaft,backplate, turbo fan, and crankshaft...or just find someone who has a very common spent Hyper.21 pullstart version...then put your piston, sleeve , and con rod in it.
Way cheaper than buying all new parts to make the conversion.

You need to give your head a shake.

what the hell is that supposed to mean ?

I just assemble mine and it is the TQ sport Hyper7 but the engine I bought won't fit due to it's pull start assembly. The engine is the .26 sportwerks, so right now it is running with s-25 hpi, I even remove the pull start assembly grind the back plate to make it fit, My question is, is the hyper engine is the only machine that will fit to this buggy?????????????

He means you DO NOT WANT TO CONVERT TO PULLSTART. They cause these engines to lose their tune due to the air leaks they allow.

You WOULD NOT need a new crank if you did go ahead with it though.

The .26 lump will fit if you cut a slot in the lower mount plate. Almost all engines will fit the Hyper 7 if the are designed for 1/8th scale.