Runner with 70cc MHR, Not as fast as expected, Help??

Hi Guy's
Can you please point me in the right direction to set up my Runner.
Spec as follows.
Polini EVO 2 Crank
Polini EVO Speed Drive.
Malossi 70cc MHR Rep Kit.
9 Roller Polini Variator.
20.5mm runner Carb, K@N Filter, running 98 jet.
125 Inlet running Malossi reeds.
Polini Gear up kit.
At the moment while running in, i have fitted my Leo Vinci ZX pipe, once run in i'll use the Polini Evo Race Pipe.

At the moment it seems fine at low to medium revs, but when trying to increase revs to full throttlle, it seems as if it bogs down, produces a hell of a lot of intake noise but not exactly setting the world on fire. Almost as if holding back.
Any help very much appreciated, as with this setup i was hoping it would fly!!!!
Please help.
Cheers Scott.

biger carb deffinetly

mate fuck the zx thats why, these things need to rev at 14k+, bang the evo pipe on.

take off the shitty zx and bang on a 25mm

yeh that pipe will be restricting it like you would not believe, n ye bigger carb wont hurt, but may aswell wack your polini pipe on now

sounds rich at full throttle but lean at part.. rolers are probably a little heavy.

move the clip on the needle down one and drop the jet size.. lightern the rollers to around 6g and work from there.

OIl Pump set up

Hi Guy's
Thanks for the replies.
Can anybody help with Oil Pump set up, are their any marks to set to etc.
Cheers Scott.

This has been covered a few times before on piaggio motor...searchy searchy

scott said:

Hi Guy's
Can you please point me in the right direction to set up my Runner.
Spec as follows.
Polini EVO 2 Crank
Polini EVO Speed Drive.
Malossi 70cc MHR Rep Kit.
9 Roller Polini Variator.
20.5mm runner Carb, K@N Filter, running 98 jet.
125 Inlet running Malossi reeds.
Polini Gear up kit.
At the moment while running in, I have fitted my Leo Vinci ZX pipe, once run in I'll use the Polini Evo Race Pipe.

At the moment it seems fine at low to medium revs, but when trying to increase revs to full throttlle, it seems as if it bogs down, produces a hell of a lot of intake noise but not exactly setting the world on fire. Almost as if holding back.
Any help very much appreciated, as with this setup I was hoping it would fly!!!!
Please help.
Cheers Scott.

Take it to a dyno and get it setup right.... simple!

I have said this a million and one times if anyone has all this cash to spend on tuning your scooter engine it is must to pay a few qwid to get it setup on a dyno so as you are getting the most out of your engines and all your roller and jetting issues will get sorted and be spot on.

Every scooter i have ever owned that had tuning parts on has ALWAYS left any sort of dyno up on power and runing better than before it went in even if i thought the scooter was runing great before it went in.

Oil Pump Set-up.

Hi Guy's
Tried searching for info on the oil pump and cannot find anything, can anybody let me know how you set it up.
Cheers Scott.

dyno setup is down to opperator.. and even then can still be way out. full power on a dyno isnt correct setup for on a road with a person.. just best max power. anyhting ive ever had on a dyno (bike wise anyway) ive ended up playing wiht as it wasent how i like it.. as for paying somone every time you change a part whats the point,

learn to get it close, when its built how you want it built dyno it.. then stop tunning..

Re: Oil Pump Set-up.

scott said:

Hi Guy's
Tried searching for info on the oil pump and cannot find anything, can anybody let me know how you set it up.
Cheers Scott.

lets hope your engine building skills are better than your searching skills :msn1:

http://www.scootershack.co.uk/viewtopic ... highlight=

Oh Yeah!!!!!

oh yeah i can see where i am going wrong!! :wallbash:

Searched for
How to set up oil pump!! arc:

When obviously i should have searched for
increasing 2-stroke oil delivery. :msn1:

Cheers Scott.