While you may find a hot twin lobe cam that will provide a performance increase, it is hard to beat the factory competition cams. For the road I prefer either the 1954 or the 1956 HS mk1 cams fitted with the single lobe VH followers. Draganfly provide an exchange service for single lobe cams regroun...

Vincent Either the mk3 cam or the VCH cam will be a lot better cam on the road than the standard cams. The VCH cam actually lifts .434” on the lobe and with a single lobe VH follower the lift ratio is .86 so the lift at the valve is .373” which is much more lift than the standard cams (A7/642 and 17...

Brian The welding near the edges of that cam looks too neat for Cartledge. Also Cartledge did not manage to grind all cams the same. He had several Ariel master cams and could vary the grind on the copy as he proceeded, which he often did if the weld was lacking in an area. A friend took a Triumph c...

Brian The valve timing does not replicate any cam that I have. The stellite weld appears to be neat with no overflow between the lobes. As such I doubt that Cartledge did the welding as my Cartledge cam weld is not that neat. My Corish cam has a timing of 23 55 64 14 at .050” lift. I know that Coris...

Brian I have a lot of hot cams for Ariel singles. The only way to compare valve timing on paper is to measure the valve timing at the same lift (or tappet clearance) and because various cams have short or long ramps then the figure of .050” is currently the generally accepted lift figure in the indu...

If you are going to build a SA 4, the proper way to do it is as the Ariel factory did, with a single front downtube.


David

I would also like to wish all a happy new year
David

Charles I hope the exhibition continues to be a success and I hope that you make it out here. However Queensland has very strict border controls and residents of NSW and Victoria were locked out of Qld due to covid, but after both states had a long period without community transmission of covid, the...

further to my previous post I stated "cut a felt washer and install it immediatley behind the kickstart or gear change levers". To clarify the felt washer is fitted outside the gearcase, immediatley behind the lever. The felt washer will soak up any minor oil leak and stop the dribble of o...

the kickstart and gear change shafts are always prone to leak a little, even with new seals. If you cut a felt washer and install it immediatley behind the kickstart or gear change levers the felt soaks up any oil and keeps the bike looking better. Also works well on the BA box where there are no se...