PX80 -> 166 Malossi upgrade

I am planning to upgrade a PX80. The goal is increase the acceleration as well as the top speed (100 kph would be nice). I did a little bit of research and I had the following setup in mind:

  • Malossi 166 (remanufactured for PX80 casing) -
  • Mazz. race crank for PX125
  • SI24/24 carburettor
  • P200 clutch (sip nr: 93010000)
  • 65 teeth primary gear to go with the clutch (sip nr: 11272000)
  • Left hand expansion chamber exhaust (SIP performance or similar)

Would this setup work well together, or am I forgetting something. In particular I am not sure about the gearing ratio. Is the combination of the 23 cogg clutch with the 65 primary enough to offset the smaller gearbox ratios of the PX80, or maybe it's too much?

 

I also want to replace the bearings and oil seal since the engine is opened. I assume I need the bearing kit for the PX80, right?

 

If anyone has some comments, that would be greatly appreciated.

 

 

Hi dude

 

Here are some basic recommendations from my expirience:

 

 

Recommendation for a high ref power setup (mid - high)

  • Malossi 166 (remanufactured for PX80 casing) -
  • Mazz. race crank for PX125
  • Dellorto PHBH 28 carburettor
  • P200 clutch (sip nr: 93010000)
  • 65 teeth primary gear to go with the clutch (sip nr: 11272000)
  • RZ Evo Right Hand

 

 

Recommendation for a high tourque setup (low - high mids)

  • Polini 177 (remanufactured for PX80 casing) -
  • Mazz. race crank for PX125
  • Dellorto PHBH 28 carburettor
  • P200 clutch (sip nr: 93010000)
  • 65 teeth primary gear to go with the clutch (sip nr: 11272000)
  • SIP NG Exhaust

 

 

Recommendation for a long life setup with 90-100 km/h

  • DR 177 (remanufactured for PX80 casing) -
  • Mazz. race crank for PX125
  • SI24/24 carburettor
  • P200 clutch (sip nr: 93010000)
  • 65 teeth primary gear to go with the clutch (sip nr: 11272000)
  • Sip Road or SIPT5 Exhaust

 

 

cheers

Thanks!

 

I just have one more question. I measured the diameter of the old cylinder sleeve (where it fits into the engine casing). It measures 66mm. This means that I need to use the thinned cylinders, specially made for PX80. Is this correct?

 

Greetings,

Bart

I have found the answer elsewhere. It is indeed the PX80 version that I need.

 

Greetz