Just put the cases together on a derbi variant rebuild. Nothing turns except the crankshaft. I put a pedal on the pedal crank and it won't budge even a cm.
Anyone have a clue of what I should look at? I am about to break it back open a second time.
Derbi variant engine won't spin.
Re: Derbi variant engine won't spin.
Is the head off? I can stand on my pedals and the motor won't turn over without the decomp pressed in, but still turn it by the flywheel.
Did you use a gasket or just motoseal when you put it together?
Re: Derbi variant engine won't spin.
Take it apart. The sprag/peanut/clown collar clip was not installed in its slot when you closed the case.
Re: Derbi variant engine won't spin.
> todd amundson Wrote:
> -------------------------------------------------------
> Take it apart. The sprag/peanut/clown collar clip was not installed in
> its slot when you closed the case.
Yeah that thing is a bitch even with possibly the best exploded diagrams known to moped-dom
Re: Derbi variant engine won't spin.
I used hondsbond to seal the case. It seems I had 3 washers instead of 2 behind a gear, removing I freed it up.
Re: Derbi variant engine won't spin.
I took it apart for a third time and excaberated a exterior crack into a full blown crack all the way through the case. It's a piston port tt and was driven like a dirbike so I got the case in banged up shape to begin with. Internals are flawless, while looking for a new case (used) someone offered me a 74cc Gila piston port that I'm gonna grab.
Re: Derbi variant engine won't spin.
Dude those cases need a gasket to shim the transmission correctly. Double check your assembly and cut or buy a gasket.. that poor derbi
Re: Derbi variant engine won't spin.
You don't know the heartbreak I had when I saw the crack... But I couldn't blame myself 100% cause it already existed prior, just on the surface exterior... At a stress point (pedals), my guess is they went off a jump at one point.
Re: Derbi variant engine won't spin.
Crack reference pic.
Re: Derbi variant engine won't spin.
Dude jb weld and run that shit into the ground
Re: Derbi variant engine won't spin.
If that's aluminum , why can't it be welded ?
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