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CB350/400 / Re: 400 four knocking noise.
« on: September 24, 2013, 12:37:11 AM »
I follow that...
The generator rotor also adds mass to the crankshaft mass to help reduce the speed fluctuations but there still isn't much flywheel effect overall.
The noise may also be worse if the cylinders are not all producing the same shove at idle?
When I had my original bike the knocking noise was less evident when the carbs were balanced and the timing was spot on.
Some bikes are also a lot quieter with the clutch disengaged. This de-couples the gearbox which mean less mass to be sped up and slowed down with each rev of the crank to reduce the noise.
The generator rotor also adds mass to the crankshaft mass to help reduce the speed fluctuations but there still isn't much flywheel effect overall.
The noise may also be worse if the cylinders are not all producing the same shove at idle?
When I had my original bike the knocking noise was less evident when the carbs were balanced and the timing was spot on.
Some bikes are also a lot quieter with the clutch disengaged. This de-couples the gearbox which mean less mass to be sped up and slowed down with each rev of the crank to reduce the noise.