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by paul.jameson
Sat Jan 09, 2021 8:54 pm
Forum: Four stroke
Topic: Distributors for SQ4
Replies: 13
Views: 699

Re: Distributors for SQ4

You can buy a brand new one, complete with distributor cap and rotor arm, plus electronic ignition from Powerspark in Bromsgrove for about £130 but they aren't the easiest to time up on a Square.
by paul.jameson
Sat Jan 09, 2021 8:52 pm
Forum: Four stroke
Topic: 1946 VB questions
Replies: 2
Views: 238

Re: 1946 VB questions

A squirt of oil will do no harm. Kick the bike over a time or two then before starting. Connect the battery then turn on the lights. If it is the right way round, the ammeter will show a discharge. If the wrong way, it will show a charge. Start the engine and watch the oil pressure gauge. Within a f...
by paul.jameson
Sat Jan 09, 2021 8:46 pm
Forum: Four stroke
Topic: My Model B's Valve Timing
Replies: 3
Views: 307

Re: My Model B's Valve Timing

Ride it and see what you think. My guess is that it will be fine. You have the coarse pitched gears used for a couple of years which means you can't alter timing by a tooth and hope that might be better. I think they are right for 1929 so go ahead and try it out.
by paul.jameson
Sun Jan 03, 2021 7:42 pm
Forum: Four stroke
Topic: Square four HT leads
Replies: 3
Views: 364

Re: Square four HT leads

I tape mine to the frame tube.
by paul.jameson
Sun Jan 03, 2021 7:41 pm
Forum: Four stroke
Topic: Help needed with BA gearbox rebuild
Replies: 7
Views: 421

Re: Help needed with BA gearbox rebuild

Your gearbox case is for a Square Four. The mountings are offset for the Square in comparison to those of the single.
by paul.jameson
Sat Jan 02, 2021 9:59 pm
Forum: Four stroke
Topic: Engine Valve caps
Replies: 6
Views: 422

Re: Engine Valve caps

Valve caps are not something I worry about. If I have a suitable set, I will fit them but if I haven't, then I do without. I have seen the mushrooming effect of not using the caps - but that was around 50 years ago on a head taken out of service some time earlier. On my own machines I have had no pr...
by paul.jameson
Sat Jan 02, 2021 9:45 pm
Forum: Ariel Talk
Topic: Which year / model is this head from ?
Replies: 6
Views: 568

Re: Which year / model is this head from ?

Volker, There is every chance you are correct. I never did know for certain what year the head(s) I used on my Red Hunter in 350 guise were. As I am working from memory alone on this, your comments ring true. But I did say that my basis of the year was the clutch cover (!) which might well not be an...
by paul.jameson
Fri Jan 01, 2021 8:54 pm
Forum: For sale/wanted - Parts
Topic: Front stand
Replies: 3
Views: 337

Re: Front stand

This type of front stand was fitted in the 1948/49/50 era, certainly to Square Fours. I had one on my 1948 4G and there is a photo in "Square Forum" of a brand new 1948 4G, agin fitted with this front stand. I don't know whether they were fitted to other models at the time or whether perha...
by paul.jameson
Fri Jan 01, 2021 8:22 pm
Forum: Four stroke
Topic: Morgo oil pump..no pressure#2
Replies: 2
Views: 304

Re: Morgo oil pump..no pressure#2

The joint between the crankcase and the oil fed/return manifold is notorious for leaks. Most manifolds have pipes which protrude from the manifold block about 3/16" into the crankcase which makes sealing a little easier. If you are using a thick oil (such as SAE40) in a cold garage it will not ...
by paul.jameson
Fri Jan 01, 2021 8:09 pm
Forum: Ariel Talk
Topic: Which year / model is this head from ?
Replies: 6
Views: 568

Re: Which year / model is this head from ?

No guarantees then but my guess would be a 350 head from 1936 or 37. I'm basing this on the tall holes for the head bolts on the drive side ( the 500 heads are different) and the clutch cover next to the head which was only fitted to open valve head bikes in 1936 and 37. The 350 as opposed to 250 is...

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