Scooterotica

can anyone tell me will i have any probz running a t5 malossi head on a T5 polini kit.

yes is the simple answer.

what sort of problems ..

it appears to run not to bad.???
SOME HINTERS IS WHAT I AM LOOKING FOR???

The Malossi head has a 66mm diameter combustion chamber. The Polini is 61mm bore. The combustion chamber will overhang the Polini gasket face. Combustion will force the head away from the cylinder and the reduced gasket seal area will not last long before leaking, or stripping a stud.

It's not going to be good but I don't think it's going to be as serious as your man would have you believe.

If the lip on the head is wider than the bore then you're going to interrupt the flame front (all to do with flow etc,) but all I think you'll end up with is a loss of power and a bit of pinking, nothing more.
Just retard your timing and don't be disappointed when it's not as fast as you thought it was going to be.

Better to get a head matched to the barrel though.

joeythescooterboy wrote:It's not going to be good but I don't think it's going to be as serious as your man would have you believe.

If the lip on the head is wider than the bore then you're going to interrupt the flame front (all to do with flow etc,) but all I think you'll end up with is a loss of power and a bit of pinking, nothing more.
Just retard your timing and don't be disappointed when it's not as fast as you thought it was going to be.

Better to get a head matched to the barrel though.

yeh ive took her out performance wasnt great but as u said the compressions arnt right. was just looking for a second oppinion..i am just trying to find someone who can do the headprofilling quick for me..
i need a polini 152 head done
a malossi 172 head done
and ive got a MRB head needing done its about a 170cc