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by david.anderson
Fri Feb 12, 2021 8:24 am
Forum: For sale/wanted - Parts
Topic: wanted: hot cam
Replies: 4
Views: 714

Re: wanted: hot cam

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...
by david.anderson
Thu Jan 28, 2021 8:29 am
Forum: Member's Bikes
Topic: Again a cam question
Replies: 4
Views: 226

Re: Again a cam question

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...
by david.anderson
Mon Jan 18, 2021 6:44 am
Forum: Member's Bikes
Topic: Another cam question
Replies: 6
Views: 374

Re: Another cam question

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...
by david.anderson
Sun Jan 17, 2021 6:18 am
Forum: Member's Bikes
Topic: Another cam question
Replies: 6
Views: 374

Re: Another cam question

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...
by david.anderson
Sat Jan 16, 2021 6:15 am
Forum: Member's Bikes
Topic: Another cam question
Replies: 6
Views: 374

Re: Another cam question

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...
by david.anderson
Fri Jan 15, 2021 6:43 am
Forum: Ariel Talk
Topic: RealClassic SQ4
Replies: 11
Views: 796

Re: RealClassic SQ4

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.
SA 4.jpg


David
by david.anderson
Fri Jan 01, 2021 5:56 am
Forum: Main Chat Forum
Topic: Happy New Year to all - let's hope for a better one than 2020
Replies: 7
Views: 541

Re: Happy New Year to all - let's hope for a better one than 2020

I would also like to wish all a happy new year
David
by david.anderson
Sun Dec 27, 2020 6:25 am
Forum: Main Chat Forum
Topic: The Motorcycle: Design ~ Art ~ Desire
Replies: 39
Views: 4695

Re: The Motorcycle: Design ~ Art ~ Desire

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...
by david.anderson
Fri Dec 11, 2020 8:31 am
Forum: Four stroke
Topic: Leaky GB gearbox
Replies: 11
Views: 1086

Re: Leaky GB gearbox

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...
by david.anderson
Thu Dec 10, 2020 6:26 am
Forum: Four stroke
Topic: Leaky GB gearbox
Replies: 11
Views: 1086

Re: Leaky GB gearbox

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...

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