About to send off my head off for a massage.
I'm mainly doing this to improve fuel economy, I've played with the jetting to where I'm super happy with it and it feels crisp and clean however it still only gets 75k to reserve or roughly 1L fuel per 10k's riding.
To start with the bike has all of 55 hours and 1750k's. I've owned it for 20 hours and 550k and since then have run Motul 800 @ 50:1.
Barrel and head looked good, still had a nice sheen of oil. Although piston crown and head tell me its burning rich on the exhaust port side? Is this normal?
The head:
Piston crown:
Barrel:
Exhaust port (looking into cylinder, Piston is at BDC and is above the exhaust port floor:
So quick facts and figures. The bike currently has 140psi after 7 kicks.
It has a single base gasket .5 mm which measures .55mm thick.
Top ring gap is 0.508mm, bottom ring gap is 0.457mm.
At BDC the piston crown is 74.5mm below the top of the cylinder.
The exhaust port floor is 77.5mm below the top of the cylinder.
So stock the piston sits 3mm above the port floor.
The squish band is 1.69mm at the outside (cylinder wall side) and is 2.11 at the inside (bowl side).