Is it worth fitting a 65 primary to a PX125

[GLscoot]

I have my casings split and was wanting to know the benefits of fitting a 65 tooth primary and a 22 tooth SIP strengthened clutch. With the primary can I remove the 68 and fit the 65 or do I need the complete unit.
Thanks Gary

[Jack221]

I can't imagine a PX125 that would ever pull 4th with gearing that high!

[GLscoot]

Is this not what the forum is about, someone had suggested this set up to me, so i decide to post the question on hear as i didn't know if it would work. So now i know.

[joeythescooterboy]

No mate, a PX struggles to pull the standard 20/68 primary, raising it would be a bad idea.

[GLscoot]

Yes I know, I won't be going down that road sticking with the 68.

[Muttley McLadd]

125 barrel, or just 125 cases?
With a half decent kit on it, it should pull 23/65 with ease.

[GLscoot]

125 matched casings to polini 180, worb5 flowed reed crank, reed valve and 28 or 26mm dellorto carb and sip cosa2 clutch 22 or 23 depending on the primary. after talking to a few people now i think i will stick to the 68 primary and the 22 clutch

[Muttley McLadd]

Are you putting a super revvy pipe on it?

[GLscoot]

the two pipes i have are the sip and gianelli. will try them both and see which one is better, may even try the bgm

[Muttley McLadd]

Are you undergearing it for a reason?
Your kit should pull 4.8, two up, with ease. Esp with a SIP road on it.