Technical Tips for Motorcyclists Technical Tips and Advice for Motorcyclists Chain Adjustment Never adjust your drive chain so it has less than 25-30 mm of vertical movement. If it is tight it will stretch and wear very quickly, put undue load on wheel bearings and swingarm bearings, in the worst cases the chain brakes and puts a hole in the crankcases or wears out gearbox bearings and shafts. If in doubt give it more free play not less.
Carbon fibre mufflers out-perform alloy or steel mufflers .
The answer of course is fiction. The only reason for the use of carbon on mufflers is to reduce weight. Carbon fibre is used in many areas on race bikes, purely for it's strength and light weight. Well, thank God for tubeless tyres. Not only did it not deflate in one miliisecond going through that 150 km plus sweeper last night, but it can be repaired cheaply and safely.