Barrel Port Heights
Posted: Thu Feb 23, 2012 12:04 am
Few weeks ago,out of curiosity I opened my Rapido 250 engine to measure the port timining.
When s**t happens,it just happens,
I lost the paper that I had written the measurements.
Has anyone ever measured the heights of the ports on a standard Rapido 250 classic barrel?
We can make a list of all the barrels available,
so it will be easier for future tuning.
Measurements taken from top of the barrel.
Rapido 225 classic
barrel height 101.6mm
Exhaust 58.82 - 36.70
Transfer 58.75 - 46.57
Inlet 95.08 - 72.37
MM 200cc Cylinder
barrel height 101.6
Exhaust 59.12mm - 40.36mm
Transfer 59.43 - 47.89
Inlet 95.07 - 76.17
Li 150 Cylinder
barrel height 101.6mm
Exhaust 58.99 -41.83
Transfer 59.37 - 47.78
Inlet 92.55 -74.19
Expect a small error in the measurements
When s**t happens,it just happens,
I lost the paper that I had written the measurements.
Has anyone ever measured the heights of the ports on a standard Rapido 250 classic barrel?
We can make a list of all the barrels available,
so it will be easier for future tuning.
Measurements taken from top of the barrel.
Rapido 225 classic
barrel height 101.6mm
Exhaust 58.82 - 36.70
Transfer 58.75 - 46.57
Inlet 95.08 - 72.37
MM 200cc Cylinder
barrel height 101.6
Exhaust 59.12mm - 40.36mm
Transfer 59.43 - 47.89
Inlet 95.07 - 76.17
Li 150 Cylinder
barrel height 101.6mm
Exhaust 58.99 -41.83
Transfer 59.37 - 47.78
Inlet 92.55 -74.19
Expect a small error in the measurements