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by pete.collings
Tue Jun 21, 2011 6:21 pm
Forum: Forum Help
Topic: File (images) posting problems
Replies: 6
Views: 2474

File (images) posting problems

I have tried to post two pics following the guidance above, but with no sucess. On hitting the "add the file" button, it swops to a blank page after showing some form of connection to the forum site. I have recently upgrades my version of Firefox, and had a few problems with some other sit...
by pete.collings
Tue Jun 21, 2011 6:16 pm
Forum: Four stroke
Topic: remove the damper rod ?
Replies: 9
Views: 1607

Having pulled out the yoke to check, it is in fact back to front rather than sideways. I note there was a thread on this topic in February. I have tried to post two pics unsucessfully, will check with admin why there is a problem posting.
by pete.collings
Tue Jun 21, 2011 5:12 pm
Forum: Four stroke
Topic: remove the damper rod ?
Replies: 9
Views: 1607

I don't know about steering dampers on girders, but if it is off a tele yoke, I believe the pin runs across rather than front to back. I have a bottom yoke that I could check if needed, but as it is at the bottom of a pile of other boxes, it would take some effort to get to it. Nevertheless, I would...
by pete.collings
Tue Jun 21, 2011 9:37 am
Forum: Four stroke
Topic: remove the damper rod ?
Replies: 9
Views: 1607

The damper rod is held in place by a cotter type pin through the bottom yoke, drift this out and the rod can be removed. I can't say I have tried this with everything in place, but so long as you can see the end of the pin, a long drift of the right size should remove the pin, along with a suitably ...
by pete.collings
Sun Jun 12, 2011 10:17 am
Forum: Ariel Talk
Topic: ENGINE
Replies: 7
Views: 3011

NHs had an alloy head and barrel with cast in pushrod tubes (as VHs from 1954) from 1956. Sound like you have an earlier top end on a later bottom end (AMA is a 1957 series engine number). The later parts appear on Ebay from time to time, and you may be able to get them via the club spares scheme. Y...
by pete.collings
Tue May 31, 2011 1:26 pm
Forum: Four stroke
Topic: GB BURMAN GEAR BOX
Replies: 1
Views: 2658

There are no manuals issued by Burman for GB boxes, although they issued manuals for earlier boxes. GB boxes are relatively straightforward, and any wear is often the result of abuse of the box. Bushes in gears can become loose and wear, if not badly worn high strength loctite will often retain them...
by pete.collings
Sun May 29, 2011 9:48 pm
Forum: Four stroke
Topic: Big end bearing
Replies: 23
Views: 6756

The outer ring of a roller bearing can have a raised edge on one side (a lip) to prevent sideways movement (usually inwards) if the ring becomes loose in its housing. The timing side main on a VH should be lipped, but the drive side roller main has no lip, and can move inwards if it becomes loose. I...
by pete.collings
Sun May 29, 2011 9:40 pm
Forum: Four stroke
Topic: Gear ratios
Replies: 2
Views: 878

The gear ratios should be the same as a GB39 gearbox which would originally have been fitted to a late NH, and would have exactly the same internals as a GB 44 box (and virtually all the other GB boxes, although the mainshaft lengths could differ dependent on the model/year). The gearing was changed...
by pete.collings
Sun May 29, 2011 11:38 am
Forum: Electrics
Topic: Testing Dynamos
Replies: 3
Views: 24114

A bit of additional information if you use a JG electronic regulator. I have run all my Ariels with a JG 12v unit, which I found very reliable for my usage of the bikes, and allowed a decent QI headlamp to be used. A downside on higher geared bikes was that you needed to do a fair speed to balance t...
by pete.collings
Tue May 24, 2011 9:50 am
Forum: Four stroke
Topic: Big end bearing
Replies: 23
Views: 6756

Kjell, a steel flywheel will have a relatively smooth inner and outer surface, whereas a cast iron flywheel will have depressions in the inner (and also to a lesser extent outer) surfaces. In answer to Nevs comments about mid 50's VH flywheels, I have never come across a cast iron VH flywheel with a...

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