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by pete.collings
Fri Jul 05, 2019 11:25 am
Forum: Four stroke
Topic: FH Shock Absorber Query
Replies: 2
Views: 122

Re: FH Shock Absorber Query

If it is free to rotate, you will eventually end up with little drive and a lot of noise! It should not be able to ride over the top of the sprocket cam, although different spring lengths (including a worn/old spring) might allow this to occur. I used to tighten the nut until it bore hard against th...
by pete.collings
Fri Jul 05, 2019 11:12 am
Forum: Ariel Talk
Topic: vch headgasket
Replies: 3
Views: 139

Re: vch headgasket

I had a problem in the past with blowing from the head/barrel joint when mating a VHA head with a new make alloy barrel. I think the head had been lapped in too many times, as there was alloy to alloy contact between the head and barrel, rather than liner spigot to head contact. I cured this by dela...
by pete.collings
Tue Jun 04, 2019 11:41 pm
Forum: Four stroke
Topic: Aftermarket alloy singles barrel and piston.
Replies: 14
Views: 636

Re: Aftermarket alloy singles barrel and piston.

I can't answer Q1 or Q2, but would advise the piston is of the type used in the wartime WNG model, and if using it with three compression rings, it is advised (elsewhere on the forum) to use the earlier oil pump with a smaller feed plunger, to avoid oil making its way into the combustion chamber. I ...
by pete.collings
Sat May 25, 2019 11:20 am
Forum: Four stroke
Topic: Changing castrol R oil
Replies: 3
Views: 498

Re: Changing castrol R oil

Thanks for the feedback, I'll try using a hybrid synthetic/vegetable oil, and aim to remove as much of the current oil as possible by removing the sump plate as well as draining/cleaning the oil tank, and then keep a good eye on the oil tank return filter to see if anything untoward appears.
by pete.collings
Thu May 23, 2019 12:20 am
Forum: Four stroke
Topic: Changing castrol R oil
Replies: 3
Views: 498

Changing castrol R oil

When I purchased my all alloy VH 2 years ago from the widow of a club member I knew, she gave me a small folder of information relating to the bike. He was into competition singles, and amongst the notes was a comment that the bike was run on Castrol R oil. Having eventually sorted out some incorrec...
by pete.collings
Sun Apr 07, 2019 12:41 pm
Forum: Electrics
Topic: Scew thread size & type?
Replies: 8
Views: 421

Re: Scew thread size & type?

Keith
I had PM'd you, but message has not been picked up yet.
by pete.collings
Tue Apr 02, 2019 4:50 pm
Forum: Electrics
Topic: Scew thread size & type?
Replies: 8
Views: 421

Re: Scew thread size & type?

I have now looked at two dynamo ends, believed to be NOS, and both have a 2BA thread to retain the end cap. They are the latest type of end, for use with the one piece metal end cover, so whether the thread was changed to suit the more robust endcap design,I do not know, although looking at a used e...
by pete.collings
Mon Apr 01, 2019 11:09 pm
Forum: Electrics
Topic: Scew thread size & type?
Replies: 8
Views: 421

Re: Scew thread size & type?

Perhaps it is a reflection on the state of many threads I have encountered in this area that a 2BA screw will invariably fit, even if it was originally a smaller, finer thread. I will take a closer look at the best condition end I have, to see if I can ascertain exactly what the thread size is, but ...
by pete.collings
Mon Apr 01, 2019 11:06 am
Forum: Electrics
Topic: Scew thread size & type?
Replies: 8
Views: 421

Re: Scew thread size & type?

It's 2BA, commonly available. I can supply a length of 2BA studding (cut from a longer bolt) plus a couple of nuts, for the cost of a stamp.
by pete.collings
Fri Mar 29, 2019 12:26 pm
Forum: Four stroke
Topic: Single Cams
Replies: 0
Views: 165

Single Cams

With the alloy engined VH I purchased a couple of year ago. I had also brought the remaining spares. I had kept the cams, but one of them appears to be a "special" regrind, which I think is the same as is fitted in the VH. It is described as "Brian's cam", and Brian used his sing...

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