11-05-15, 01:56 PM
Mine also suffered from the carb icing misfire and the Silkolene fuel treatment also had no effect. Got used to it ( only a problem when starting from cold in sub zero conditions, no problem once bike was garaged) and knew once misfire started just had to stop engine for a minute or so and problem gone till next cold start.
When o-rings on coolant pipes exiting the back of the cylinder head started leaking had to take carbs of to replace the o-rings and found the carb heater pipe blocked. Managed to blow them clear with a footpump without dismatling them. Once everything was back together again the carb icing misfire was gone.
Checking the way the pipes connected the carb heater only has coolant flowing through when the thermostat is closed. This avoids the carbs being heated to 80 or 90 degrees once engine warmed up
When o-rings on coolant pipes exiting the back of the cylinder head started leaking had to take carbs of to replace the o-rings and found the carb heater pipe blocked. Managed to blow them clear with a footpump without dismatling them. Once everything was back together again the carb icing misfire was gone.
Checking the way the pipes connected the carb heater only has coolant flowing through when the thermostat is closed. This avoids the carbs being heated to 80 or 90 degrees once engine warmed up