GPR Camp: Replica Racers

Got a new bigger project running along with the other one...

For this one we went with a BRK 88 with its 45mm stroker crankshaft.
About the cylinder, got a nice finish but it turns out that it has the same problems as the other BRK cylinders. Poor nicasil coating... it really likes to chip...
Ports have a nice finish but they are kinda out of symmetrical places.
Channels are bad, but correctable, boost channel is stupid...

This cylinder has to go through porting of course.
Stock timings are 200 degree exhaust and 128 degree. Going for 200/130 because we have a bit higher revving exhaust. Want a bit higher, narrower powerband. Will be okay as now the transfers are higher than the boost by 2 degrees.





New Channel outlay

BRK seems to be a notch up from the Airsal. How did your porting turn out?

Brk has a modular head, thats why its better. Nothing else.
Its still under porting, it will be done probably in the next weeks