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I do not know if my Boyer goes to full advance immediately. I just set it to 34 degrees for methanol and jet to it. If it is wrong, it does not matter - because the jetting balances the compression ratio and the ignition advance. I adjust the jetting. Bob Rosenthal sets the jetting then advances the ignition advance to get maximum torque - it might be a better way. When you use a Commando-based race bike, the usable rev range is from 5,500 RPM to 7300 RPM. Whatever cam, exhaust system, jetting, ignition timing and gearing you use - that is the usable rev range. Everything needs to suit the circuit on which you race.Close ratio gears are essential. With wide ratios and low overall gearing, the Commando engine is stupid.The tendency for most guys is to look what happens with short stroke, light crank motorcycles, and judge from that. Commando engines are very different. If you lower the gearing with a Commando engine, the bike does not usually accelerate faster.
I do not know if my Boyer goes to full advance immediately. I just set it to 34 degrees for methanol and jet to it. If it is wrong, it does not matter - because the jetting balances the compression ratio and the ignition advance. I adjust the jetting. Bob Rosenthal sets the jetting then advances the ignition advance to get maximum torque - it might be a better way. When you use a Commando-based race bike, the usable rev range is from 5,500 RPM to 7300 RPM. Whatever cam, exhaust system, jetting, ignition timing and gearing you use - that is the usable rev range. Everything needs to suit the circuit on which you race.
Close ratio gears are essential. With wide ratios and low overall gearing, the Commando engine is stupid.
The tendency for most guys is to look what happens with short stroke, light crank motorcycles, and judge from that. Commando engines are very different. If you lower the gearing with a Commando engine, the bike does not usually accelerate faster.
