imported post
Al... Carbon can definetly be a factor in these bikes.. You won't necessarily see it on the plugs, because the tips get much hotter than the piston top and cylinder head. The build up everyone is talking about is on these surfaces.. Also, whenever ignition timimg is mechanically advanced, a cooler spark plug should be installed to prevent detonation. Detonation occurs when there is a hot ember sitting in the cylinder when the piston is on the compression stroke and the fuel mixture is ignited prematurely. Pre-ignition is spark timing too far advanced during the compression stroke which ignites the mixture before the piston reaches TDC. There is a difference and quite often gets confused.
Without knowing the condition of your engine, and sensing that these problems basically began with the trigger wheel, may I suggest dropping the spark plug temp range one number colder. You will not lose any power or performance and will be able to run the trigger wheel with the 4 degree advance..
The other alternative is to pull one head and check the piston and head for carbon build-up. You will be amazed at what can be there. If one side is carboned up, you can bet the other is too...
Let us know what yor final outcome is.. Thanks...
Al... Carbon can definetly be a factor in these bikes.. You won't necessarily see it on the plugs, because the tips get much hotter than the piston top and cylinder head. The build up everyone is talking about is on these surfaces.. Also, whenever ignition timimg is mechanically advanced, a cooler spark plug should be installed to prevent detonation. Detonation occurs when there is a hot ember sitting in the cylinder when the piston is on the compression stroke and the fuel mixture is ignited prematurely. Pre-ignition is spark timing too far advanced during the compression stroke which ignites the mixture before the piston reaches TDC. There is a difference and quite often gets confused.
Without knowing the condition of your engine, and sensing that these problems basically began with the trigger wheel, may I suggest dropping the spark plug temp range one number colder. You will not lose any power or performance and will be able to run the trigger wheel with the 4 degree advance..
The other alternative is to pull one head and check the piston and head for carbon build-up. You will be amazed at what can be there. If one side is carboned up, you can bet the other is too...
Let us know what yor final outcome is.. Thanks...
