

Got me nicely rebored & painted barrels at the ready... along with the WISECO 75mm piston kit & some feeler gauges

The Wiseco's come with info in "gapping" the rings.... its:
bore size x 0.0045" for the top ring & 0.0055" for the middle

Thats 0.034mm & 0.041mm in new money

So the procedure is to fit each ring in turn into its respective bore & measure the end gap......
To ensure the ring is dead square in the bore, use the piston to push it down about 20mm...

Then you can measure the 'end gap'.... like so........

If the gap is too tight.... you will need to file the end of one side of the ring. It must be kept square to the other one & file inwards & be sure to remove any burrs

Best to fit rings to correct pistons as you go - making sure they are all clearly marked & matched to the relevant bores...

Once this process has been done with them all you can fit 1 x circlip to each piston to hold gudgeon (wrist) pin. This is easier than trying to fit ALL of them when the pistons are fitted to the conrods


Its usually best to fit the outer most circlips last

DON'T FORGET TO MAKE SURE PISTON ARROWS (ON TOP SURFACE) ARE POINTING FORWARDS

Whilst fitting pistons, cover all crankcase openings.... bung rags on case openings beneath pistons & cam chain tunnel...



Time for more TEA & BISCUITS now
