Motovespa P2 power

[jellerby]

Apologies for all the questions about my scoot. Recently added a SIP Road all running fine, upjetted. Got 70mph out of it, slowly dropping to 55ish.. I've also added a Polini air filter on. Haven't upjetted to the recommended 140 main though, as of yet. Changed my spark plug from a 9 to a 7 a couple of days ago, now getting 60mph out of it.. One problem is, I can't rev out of the 3rd gear.. 4th doesn't have much pull. 

New spark plug made some difference, less kicks to start (I hope) and slight improvement on power. My thinking is the carb isn't set up properly or..? Also recently changed fuel filter in the bowl.. 

Maybe an air leak somewhere? Worn piston rings? 

Everything running fine accept the 3rd gear not revving out fully?

Only a week or so till Cleethorpes, hoping for an easy, understandable fix..

[henri]

not revving out is often the jetting , the easy fix for cleethorpes is to remove polini filter an go back to the set up you had after fitting sip pipe. come back to the polini filter when youve more time an the larger jets needed .
otherwise its check the ignition circuits ,a bad connection on green cdi wire can starve it of power an act as a limiter .check timing an then go through a jetting/plug chop routine til its right .
it sounds like by not upjetting for the polini filter you might of dangerously leaned out the mix ,how far is it to cleethorpes an is any of it fast road/motorway .H

[jellerby]

I have the 140 main recommended, just haven't fitted as of yet.

Not sure on how to check the circuits, never done anything like it and I'd rather not mess something up..

It's about 2 hours from where we are leaving from.

[henri]

either upjet to the 140 an dont do any long full throttle bits til youve checked the plug colour ,or remove polini an go back to old/safe set up .its that or pack a recovery card an butty for the wait by side of road .H

[jellerby]

Planning on removing the filter and sticking a 120 main jet back in along with the SIP Road 2, see how it goes. It won't be running without any filter though. Should I buy one and drill holes above jets?