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by Pete.Silson
Tue Jul 16, 2019 4:00 pm
Forum: Four stroke
Topic: NH chain alignment
Replies: 10
Views: 247

NH chain alignment - bent frame

Thank you for the pictures Alan - this is just the information I needed to eliminate the issue being with the gearbox. Unfortunately the bad news is that I am now fairly sure I have identified the real problem. When I checked the rear sprocket alignment relative to the chainline it was significantly...
by Pete.Silson
Sun Jul 14, 2019 11:13 am
Forum: Four stroke
Topic: NH chain alignment
Replies: 10
Views: 247

Re: NH chain alignment

Or you can try this cunning eyeball assisted thingy that doesn't need batteries and doesn't mind getting dropped into the oil tray too much:

http://www.ebay.co.uk/itm/163497562729

Pete
by Pete.Silson
Sat Jul 13, 2019 6:30 pm
Forum: Four stroke
Topic: NH chain alignment
Replies: 10
Views: 247

Re: NH chain alignment

Simon - The gearbox number is G92 D 49 which I believe is correct for 1949.

Paul - The sprocket position in your picture looks radically different from mine - is your gearbox a CP or a GB?
by Pete.Silson
Sat Jul 13, 2019 3:54 pm
Forum: Four stroke
Topic: NH chain alignment
Replies: 10
Views: 247

NH chain alignment

I have just acquired a 1949 rigid NH (with a 500 top-end fitted). One issue (among many) is that the rear chain appears to be cutting its way through the back of the primary chaincase. I have tried padding the bottom case/frame bolt but this simply causes the back of clutch basket to rub. chaincase ...
by Pete.Silson
Mon Jul 01, 2019 5:36 pm
Forum: Four stroke
Topic: Balance pipes
Replies: 5
Views: 308

Re: Balance pipes

The left hand one appears to be the same as my '46 (including the rust).
DSCF2855.JPG

Pete
by Pete.Silson
Thu Jun 06, 2019 7:07 pm
Forum: Ariel Talk
Topic: Different size Ansti stirrup
Replies: 10
Views: 828

Re: Different size Ansti stirrup

5/8" 20tpi BSCy RH

Pete
by Pete.Silson
Sat May 25, 2019 10:18 am
Forum: Ariel Talk
Topic: Different size Ansti stirrup
Replies: 10
Views: 828

Re: Different size Ansti stirrup

The early type with snail cam adjusters on the axle (4980-39, 4982-39) has a longer lower axle fork although, somewhat confusingly, the 1939-46 workshop manual shows equal length stirrup in the illustration whereas the 1939 and 1946 parts books show longer lower forks. The 1st picture below is from ...
by Pete.Silson
Sun Apr 28, 2019 10:02 am
Forum: Four stroke
Topic: HWH brake shoes
Replies: 2
Views: 190

Re: HWH brake shoes

From (limited) knowledge gained from my SQ4 dealings the 1" linings are from 1937 and earlier QD rear hubs, the 1-1/8" are from later QD and fixed rear hubs. C15/28 (4100-32) 1937 (and earlier) QD rear hub, lining 6-5/8"x 1" x 3/16" C15/97 (4385-38) 1938 onwards fixed and QD...
by Pete.Silson
Mon Apr 08, 2019 12:41 pm
Forum: Four stroke
Topic: PA tank panel
Replies: 2
Views: 198

Re: PA tank panel

Is this what you need? I can take some measurements if you need them.
4G Tank Panel.jpg


Pete
by Pete.Silson
Tue Mar 05, 2019 7:59 pm
Forum: Four stroke
Topic: BA kickstart quadrant stop rubber advice
Replies: 9
Views: 346

Re: BA kickstart quadrant stop rubber advice

I've ordered some nylon suspension bushes and will see if they can be fitted inside the old metal cap. I wouldn't expect the nylon to deteriorate in gearbox grease for a year or two. bushes 1a.jpg Possibly a job for that new-fangled 3D printing.... Does anybody have access to a 3D printer I can thin...

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