No category or tags until the race is done
Some fifty tuning
Most importantly the paint scheme has been selected, a joey dunlop traditional yellow with black pin strips. worth 5bhp at least.
50cc bore and stroke with c90 head installed, fuck all compression ratio and no squish band. but he won’t fix it since he plans to run the 70 class next year and doesn’t have a spare head.
selection of heads, bottom left is the fifty head, it’s got 19in/13ex valves minuscule, all the other heads have 25in/22ex, the very early 90 head (top left) has a flat face with no squish band and would be perfect except the its the older cam in head design and the race for the cam is magnificently worn out.
Difference in inlet porting.
older style piston on the right would be brilliant if we could get a cam chain length to match the appropriately heightened barrel (piston is from the pushrod 50)
the shocks from my rxs have found a temporary new home.
Racing tyres,
pro: sticky, peaky profile might give us less drag on the straights, out psych the competition.
con: quite heavy, probably the wrong size, will tear the chassis to shreds in a hard corner
Last years trophy.
