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by john.bebb
Wed May 29, 2019 5:59 pm
Forum: Ariel Talk
Topic: Different size Ansti stirrup
Replies: 10
Views: 1123

Re: Different size Ansti stirrup

Just a throw in - In my experience I prefer to use the later stirrup with the threaded adjusters... the snail cams can be swines to adjust and tend to slip, particularly if the machine has a chair.. I put an add for my old ones in some yonks back... still no takers... http://forum.arielownersmcc.co....
by john.bebb
Thu Apr 11, 2019 10:21 am
Forum: Four stroke
Topic: Coil or Mag? E3L or Alton?
Replies: 9
Views: 601

Re: Coil or Mag? E3L or Alton?

Suggest that "Alton" might be replaced by "Iron Horse Spares" - admittedly they are more expensive - but with 300W available there is sufficient headroom to fit whatever lighting, heated grips, seat... en suite shower & closet you wish. The Alton only gives 100W which is not ...
by john.bebb
Thu Apr 11, 2019 10:19 am
Forum: Four stroke
Topic: Coil or Mag? E3L or Alton?
Replies: 9
Views: 601

Re: Coil or Mag? E3L or Alton?

Suggest that "Alton" might be replaced by "Iron Horse Spares" - admittedly they are more expensive - but with 300W available there is sufficient headroom to fit whatever lighting, heated grips, seat... en suite shower & closet you wish - the Alton only gives 100W which is not...
by john.bebb
Thu Apr 11, 2019 10:01 am
Forum: Four stroke
Topic: '58 SQ4 REBUILD
Replies: 22
Views: 1284

Re: '58 SQ4 REBUILD

Hi Stewart - if you're not against sane upgrades; - strongly suggest an Iron Horse alternator - 12v 300W - then you can see, be seen & fit heated grips, an en suite closet & whatever takes your fancy... recommend you do NOT use cheaper alternatives to the Iron Horse device... Have Kirby Rowb...
by john.bebb
Thu Apr 11, 2019 9:33 am
Forum: Four stroke
Topic: help sq 4 wont run
Replies: 30
Views: 1818

Re: help sq 4 wont run

Hi Kevin - IMHO & experience; - the Amal main jet as supplied by Drags is way too small. I use a 220 - exhaust is not sooting & plugs come out chocolate... I run 12v via Iron Horse alternator, Boyer Bransden ignition with Kirby Rowbotham modified distributor such mods may contribute to the d...
by john.bebb
Fri Apr 05, 2019 4:13 pm
Forum: Four stroke
Topic: Cleaning oil tank
Replies: 10
Views: 753

Re: Cleaning oil tank

John P. - love your solution to de-gunge the oil tank... but what reaction did you get from the Mrs???
Cheers, John B.
by john.bebb
Fri Apr 05, 2019 4:06 pm
Forum: Four stroke
Topic: Square four rebuild- next problem
Replies: 43
Views: 2052

Re: Square four rebuild- next problem

Setting valves on a Sq4; - by design of the motor; - Whatever one pot is doing - the diagonally opposite pot must be diametrically opposed in the four stroke cycle... Therefore - take all plugs out & put machine on rear stand & in a suitable gear; - rotate rear wheel till the valve diametric...
by john.bebb
Fri Apr 05, 2019 3:32 pm
Forum: Four stroke
Topic: SQ4 head studs
Replies: 5
Views: 400

Re: SQ4 head studs

Pete - the reason to "test the studs to 30ft/lbs" is to pre-load (marginally stretch) them before fitting...
contrary to popular belief - virtually all metals to a small extent... show elasticity! (i.e. Young's modulus)
Cheers, John
by john.bebb
Fri Apr 05, 2019 3:09 pm
Forum: Four stroke
Topic: help sq 4 wont run
Replies: 30
Views: 1818

Re: help sq 4 wont run

Kevin - SERIOUSLY - you are risking major problems if you neglect to clean the sludge traps!!!
My personal view on the Amal is that the main jet as supplied by Drags is way undersize...
IMHO it should be at least a "220" Cheers, John
by john.bebb
Fri Apr 05, 2019 2:54 pm
Forum: Four stroke
Topic: Hello New Forum member
Replies: 10
Views: 826

Re: Hello New Forum member

Hi mtang, - whilst you've got it in pieces... thoroughly recommend upgrading the electrics; - A DECENT (12v 300W) alternator conversion; - suggest: https://ironhorsespares.co.uk/square-four-alternator/ beware of lesser alternatives! Have the distributor modded c/o Kirby Rowbotham to remove the point...

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