Ariel Owners Motorcycle Club

Hi All
I understand the original spec MK1 clearances are 0.002" for inlet and 0.004" outlet. I need to finish hone new Colsibro guides, but just thought it prudent to ask whether 0.004 is necessary (no point in removing material is not necessary).

I was going to use 250 grit for final finish, and a coarser grit for removal.

Cheers
C

Guides should be honed to the nominal size as the clearance is on the valve.

Hi Cam. This is from C. W. Wallers book.You can work out the max and min from the figures.

It Tells you, Just above A bit less on the Inlets will reduce oil consumption and they rarely grab when Oil s around. Not so with the exhausts. Try to have the finish good or rapid wear Happens.. Nev