Scooterotica

Can you longstroke a polini 177 kit if so what crank and what packer plate is required

You can put a long stroke crank on nearly anything. If you mean a 60mm (not 62) crank then you normally need 1.5mm of packing to bring it back to "normal". Or there's this head that means you don't need a packer, and it's a way better design - especially in the squish department.



http://www.sip-scootershop.com/en/produ ... +_38348600

so malossi head fits the polini ok
looking at a polini barral with a better piston 60mm maz crank 1.5 packer 24/24 carb (modified) sip exhaust 22 tooth cosa clutch

ducksta wrote:so malossi head fits the polini ok
looking at a polini barral with a better piston 60mm maz crank 1.5 packer 24/24 carb (modified) sip exhaust 22 tooth cosa clutch

Well it's the same stud pattern on the cylinder so yes the Malossi head fits... but this one has been re-machined to ensure the squish band is a good match to the piston crown shape and that the combustion chamber cc's are correct. As you can imagine the head volume at (say) 10:1 on a 166 will make for too high compression on a 187.

If you want to use a packer then don't use that head, use the 57mm version. You're going to run a Grand Sport piston then?

Yes grand sport piston , will go with the head makes sense i just need a kit putting together by a supplier so i dont have 2 pistons and heads anybody do this might send sip a email

Let's know how that works out, I haven't had much luck with them in the past splitting up kits... got a few standard kit heads kicking around here!

I put a 60mm P2 crank in my Malossi 166. Now 175cc
3mm longer stroke and 5mm longer rod. Used a 1/4ins pack plate (6.35mm).
Used it for a few years as a mile eater rally going machine, engine is currently in my scootercrosser.

OzOAP wrote:I put a 60mm P2 crank in my Malossi 166. Now 175cc
3mm longer stroke and 5mm longer rod. Used a 1/4ins pack plate (6.35mm).
Used it for a few years as a mile eater rally going machine, engine is currently in my scootercrosser.

Did the case need machining to fit it? Or did you take the lip off the crank?

Can do either way, but I machined casing so I could run wider inlet port.