Welcome to NZ Cylinders

No matter what cylinder bore material you have extreme wear will occur if dust/dirt is allowed to enter your engine. Your engine can be destroyed in minutes.

Always check the airfilter; no holes or tears, it's oiled correctly, fits snugly against the airbox, the airbox to carb seal is airtight. Always follow the manufacturers instructions.

Drowned your bike? Dirty water can be pulled through the filter; it has been suggested that when water enters the engine it causes the plating to flake off around the exhaust port but when we look at cylinders with this type of damage the plating is still firmly attached but is worn through to the alloy.

So what does abrasive wear look like?

Look for fine vertical scores, the bore and piston contact areas will have a dull lapped appearance.

If the ring was chrome plated it is likely that the chrome will be worn through in places; wiping it with a copper sulphate solution will so where the chrome is worn off.

The plating may be worn through to the underlying aluminium around the exhaust port or at the top of cylinder.

The machining marks on the piston skirt maybe worn smooth.