Tuning The Honda CR80 Motor
OK, so you want to make your Honda CR80 go faster and produce more power
Ensure that the motor is in good shape:
New piston, new ring, the ring and bore clearance is 2 thou of an inch maximum
At this point with good jetting and a nice busicuit brown plug electrode you should see 20hp
This is what you do:
1. Bolt on an FMF Fatty Pipe
2. Put on a Keihin flat slide carburettor
3. Add a V Force reed block
You now have 24 hp and the start of a weapon
4. Run the biggest barrel possible - 85cc
5. Change to a race fuel - VP109 will give you another 1 hp
6. Machine the head to suit the high compression levels required by VP109 - research the net for this one
7. Machine 2mm - 4mm off the back of the cylinder inlet manifold to increase the crankcase compression - you now have 26hp
8. Add a Vortex programmable ignition
9. Read Eric Gorr's tuning tips and get the transfer ports altered - you now should have 28hp
10. Learn how to ride the bike with the throttle wide open at all times