Hi Simon - thanks for your response Qest 1) By 'outer cage' are you referring to the bearing outer race ? Answer Yes correct 2) Is it a parallel fit crankpin or a taper fit crankpin? Answer Its a taper fit crankpin. I measure its a half thou taper of its length. 0.9375 / 0.938 both sides. 3) Are you...

Should have mentioned that in the description. New drilling on the 3/4 inch taper

Hi Adrie, Yes it does - not overlooked - already drilled the new oil hole everything aligns. Well spotted your obviously on the case.

Keith. So VH you don't mention which one and assuming no engine mods Pushrod overaul lengths - measurement is inside the cup to the ball end. From memory I think the inside cup is 5/16 inch but not sure - you need to measure. 1950 - 58 11 15/16 inch alloy head 1939 - 53 11 7/16 inch iron head Ends c...

Keith. So VH you don't mention which one and assuming no engine mods Pushrod overaul lengths - measurement is inside the cup to the ball end. From memory I think the inside cup is 5/16 inch but not sure - you need to measure. 1950 - 58 11 15/16 inch alloy head 1939 - 53 11 7/16 inch iron head Ends c...

Sketch of the set up - easier to visualize hopefully.

In the process of fitting a new VG big end (1 15/16inch). Firstly all the parts are unknown to me and have unknown history. This is my first attempt at a rebuild of a set of VG flywheels. The timing and drive steel flywheels are both identified as A7/343S not identified on Roger Gwynns list of flywh...

Update on JP piston std 500cc 7.5 an excess material removal. Now weighs in at 463 gms showing a 3% reduction

Update on JP piston std 500cc 7.5 an excess material removal. Now weighs in at 463 gms showing a 3% reduction

I've re-posted my response in this subject title as it where the data originates. It may be of some use. Ariel Piston Comparisons.xls Thanks all - here's something for the Bank Holiday reading and lockdown. I have trawled through the links (which pistons are available for my Ariel) and come up with ...