Just did mine with a solid flywheel and H/D clutch, notice the shudder if using the wrong gears to go round corners and the like at slow speeds, but no obvious extra cabin noise and no obvious difference in gear changes. . . . .I am however obviously aware of how much smaller my bank account looks after fitting a new 3" stainless exhaust, chip, flywheel and clutch, tyres. . . . . .