It is important to do regular valve clearance and bike servicing to maintain the working condition of your bike’s engine. What exactly is valve clearance, you may ask.
For starters, valve clearances are the small gaps between the tops of the valve stems and the part of the mechanism which presses on them to open the valves. If the valves are on the set on the correct clearance setting, you get a quieter running engine, maximum cam lift and duration. This ensures that the engine runs at its optimal performance.
As wear and tear sets in on the valve seats, the clearances tighten up further and the valves are held open, especially as the engine gets hot, further closing up the clearances. If the valves are held open even one-hundredth of a millimeter, the hot gases of combustion are forced through like a blowtorch, burning the seats and valves.
If they’re too loose then performance suffers due to the reduced cam duration and lift. The engine will be noisy. The wider gaps can also cause wear on the cam lobes and buckets as well as the valve seats. If the clearance is too tight, the valve cannot close properly, causing a loss in power and possibly damaging the engine.
If you’re unsure of whether your bike requires valve clearing, drop by Speedzone today to chat with our friendly technicians or drop us a line to find out more about KTM Duke 200 servicing today!