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which size crank
Posted: Tue Sep 22, 2009 11:46 am
by druist
have a GP150 sil and am thinking of going to an imola. gearing is the sx150 type, 16 x 46, what size race crank stroke, length would be the most ideal? What factors dictate the size?
Re: which size crank
Posted: Tue Sep 22, 2009 12:42 pm
by RinB
See post below giving variants on stroke & rod length etc
http://scooterotica.org/tempforum/viewt ... p?f=5&t=28
Typical Imola 58mm stroke 107mm Conrod
But 110mm rod with relevent packer to adjust timings can be used if need be
Re: which size crank
Posted: Tue Sep 22, 2009 1:27 pm
by druist
thanks Rinb
Re: which size crank
Posted: Tue Sep 22, 2009 8:28 pm
by bristolmod
Drew
have you taken your medication today?
Re: which size crank
Posted: Wed Sep 23, 2009 12:59 am
by corrado
You can also get the Imola kit to suit a 58 x 116 crank, that's what's in mine.
I bought it as a complete engine with the Imola fitted. It ran great until I holed the piston, upon breaking it down I found it had a TV crank and flywheel, so when I rebuilt it I decided to use a new 58 x 116 GP crank with piston to suit.