AJS & Matchless Owners Club

Pulling down my G80L and find the piston fitted is stamped on the crown with Northlite 66 REGD

I did google search and could only find one reference to Northlite pistons as being made by A.P.North.

Till I get a bore gauge and can measure that correctly I can only go by measuring the piston with is 83.5mm.

1 piston ring is broken.

So do I wait till I can measure the bore and then buy a piston to suit the bore or try to get rings that fit this piston.

The bore seems to be in good condition.

WnRn wrote:Pulling down my G80L and find the piston fitted is stamped on the crown with Northlite 66 REGD

I did google search and could only find one reference to Northlite pistons as being made by A.P.North.

Till I get a bore gauge and can measure that correctly I can only go by measuring the piston with is 83.5mm.

1 piston ring is broken.

So do I wait till I can measure the bore and then buy a piston to suit the bore or try to get rings that fit this piston.

The bore seems to be in good condition.

Yeah you'll need a gauge to be sure, but one thing you can do is pull the rings off the piston and slide it mid-way down the bore and use shim gauges to figure out how far out it is (vs the measurement you get off the piston itself).