Series one engine

hi I'm wondering if somebody in the know could confirm exactly what needs to be done to fit a new/aftermarket crank to the series one engine from a skipper ? Main bearings have gone so ive decided it's a good time for a aftermarket crank 172 kit ect . Thanks jamie

 

Anyone know this? Ive also got a series 1 engine sat in the shed and wouldnt mind tuning it

 

http://scootershack.co.uk/threads/how-to-change-your-crank.33799/

 

The very early engines had a smaller flywheeled cranks, you need to strip it down and measure up against a new crank, it is possible to machine the cases out if it is a problem.

 

It's deffo a series one engine..got the malossi kit ect already.just don't wanna fit it to a weak crank

 

I've had good result's using a top racing crank, try one!

 

Are they a straight fit into the series one engine though ?

 

As I said, strip it down and have a look!