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"70cc" Minarelli only goes 40?

Posted: Sat Jun 09, 2012 5:50 pm
by thebook92
Bought a scooter (2005 Cobra Pierspeed Cheetah XS, if anyone's wondering) that has a horizontal Minarelli clone in it. PO said it has a 70cc BBK on it (oil tank is gone, so I'd be inclined to believe him), but it will only hit 35 easily and will creep up to 40. I figured it should to closer to 50; is my expectation just off, or is there something I should be worried about?

EDIT: Everything else is stock, to the best of my knowledge. Is this part of the problem, as well?

Re: "70cc" Minarelli only goes 40?

Posted: Sun Jun 10, 2012 5:28 pm
by Trafficjamz
sound like the PO is a liar!


No just kidding. It probably just needs to be tuned correctly.

Re: "70cc" Minarelli only goes 40?

Posted: Mon Jun 11, 2012 3:07 pm
by thebook92
That's kinda what I figured. I know I need to rejet the carb to make it run better. I'm thinking get a new carb, UNI filter, and a bunch of jets, say 90 to 105, for tuning. I'm kind of new to tuning scooters like this, so does that sound like a good idea?

Re: "70cc" Minarelli only goes 40?

Posted: Wed Jun 13, 2012 10:44 am
by eliteguy50
thebook92 wrote:That's kinda what I figured. I know I need to rejet the carb to make it run better. I'm thinking get a new carb, UNI filter, and a bunch of jets, say 90 to 105, for tuning. I'm kind of new to tuning scooters like this, so does that sound like a good idea?
And pilot jets.