vespa px gear ratios

[ducksta]

hi guys long stroking a polini barral 26mm phbh carb saxon exhaust what gearing do i need clutch 21-22-23? standard gearbox in at present

px 125cc donar

[ducksta]

some one must have a view

[cartmel808]

I run standard PX125 box with 22t clutch & DRT 65t primary on my Quattrini M1xl...


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[paul d]

If it has a 68 tooth primary drive then a 22 tooth clutch is the biggest you can use.

[Muttley McLadd]

Is a Saxon exhaust revvy? Google isn't helping me..

My long stroke 190 runs stock 23/65 primaries with the short 4th gear, with a RHS JL pipe (or a SIP road). It'll sit around 110ks until the petrol runs out.