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by chris.shearwood
Sat Jan 23, 2021 2:47 pm
Forum: Four stroke
Topic: Sq4 Valve Timing
Replies: 8
Views: 446

Re: Sq4 Valve Timing

Wow Chris you are the Champion ! Hi Rudolf, I'm definitely not the champion! In fact, I'm embarrassed that I didn't figure it out right away because it is quite simple and straight forward looking at it all with hindsight. Thank you for taking the time to reply to my original message and good luck ...
by chris.shearwood
Sat Jan 23, 2021 1:26 pm
Forum: Four stroke
Topic: Sq4 Valve Timing
Replies: 8
Views: 446

Re: Sq4 Valve Timing

Hi Rudolf, To understand Bruce's figures it is important to note that the keyway at the 6 o'clock position in the above diagram is aligned with the point of the "bottom" tooth of the sprocket. If somebody machined fourteen keyways aligned with the points of each tooth of the sprocket, they...
by chris.shearwood
Sat Jan 23, 2021 8:59 am
Forum: Four stroke
Topic: Sq4 Valve Timing
Replies: 8
Views: 446

Re: Sq4 Valve Timing

I've been tossing and turning in bed unable to sleep thinking about how Bruce arrived at the 5.55 degree figure and I've finally figured it out but it is almost 4 AM so now back to bed!
by chris.shearwood
Thu Jan 21, 2021 4:53 pm
Forum: Four stroke
Topic: Sq4 Valve Timing
Replies: 8
Views: 446

Sq4 Valve Timing

I've been looking at Sq4 valve timing and, like others before me, I find the subject a bit confusing. Bruce Longman's Valve Timing Procedure, which can be found on Draganfly's web site, is very helpful but still leads to some head scratching for me. The diagram of the crankshaft simplex sprocket sho...
by chris.shearwood
Tue Jan 19, 2021 5:19 pm
Forum: Four stroke
Topic: Magneto SQ 4
Replies: 4
Views: 214

Re: Magneto SQ 4

Hello Fritz,
I'm sorry I don't have one for sale. Where are you located? There is some information on that greaser here:
viewtopic.php?f=11&t=9789&hilit=greaser&start=10
Regards, Chris
by chris.shearwood
Sat Jan 16, 2021 4:54 pm
Forum: A Bad thing happened to my Ariel
Topic: who put those circlips there ??
Replies: 8
Views: 495

Re: who put those circlips there ??

I had quite a struggle once fitting a new tube and tire to one of the rims of my Sq4 and once I got them on the rim it took a lot of inflating and deflating and bouncing it up and down to centre the tire properly. After finally getting it all done I cracked open a beer, sat down to enjoy it and noti...
by chris.shearwood
Tue Jan 12, 2021 1:03 pm
Forum: Four stroke
Topic: VB leaking petrol
Replies: 22
Views: 1024

Re: VB leaking petrol

Mark,
You could always do what a previous owner did on the 289 of my VH: plug the overflow hole with a wooden peg! Yikes!
by chris.shearwood
Sat Jan 09, 2021 3:22 pm
Forum: For sale/wanted - Parts
Topic: SQ4 Mk1 RH footrest support // FOUND, thanks
Replies: 5
Views: 738

Re: SQ4 Mk1 RH footrest support // FOUND, thanks

Avec ta bonne chance tu devrais aller acheter un billet de loto!
With your your good luck you should go buy a loto ticket!
by chris.shearwood
Sat Jan 02, 2021 2:37 am
Forum: For sale/wanted - Parts
Topic: Front stand
Replies: 3
Views: 370

Re: Front stand

That stand looks to be exactly, except for the colour, like the one on my 1950 NG which I believe to be original to the bike. The measurements correspond too.
by chris.shearwood
Fri Dec 04, 2020 12:31 pm
Forum: Electrics
Topic: Charging problem?
Replies: 12
Views: 892

Re: Charging problem?

You can run a wire from the Dynamo wire to the Field wire with a momentary switch in the circuit. Touching the switch should be enough to wake up the regulator. A bit of a bodge but what the H***

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