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by Pete.Silson
Sun Oct 25, 2020 7:57 pm
Forum: Four stroke
Topic: Unknown piston
Replies: 6
Views: 365

Re: Unknown piston

I remember ridge-dodger rings for old bores but the reverse champher profile of this ring doesn't look like a ridge-dodger to me.
step.jpg
step.jpg (33.7 KiB) Viewed 315 times

Pete
by Pete.Silson
Sun Oct 25, 2020 12:45 pm
Forum: Four stroke
Topic: Unknown piston
Replies: 6
Views: 365

Re: Unknown piston

number.jpg
by Pete.Silson
Sun Oct 25, 2020 12:22 pm
Forum: Four stroke
Topic: Unknown piston
Replies: 6
Views: 365

Unknown piston

piston.jpg The engine of my recently acquired iron NH was supossedly rebuilt around 20 years ago but never been run. Having found a number of issues with it I am in the process of re-rebuilding. The piston appears to be quite high compression. Does anybody recognise it (manufacturer, compession rat...
by Pete.Silson
Fri Oct 23, 2020 12:01 pm
Forum: Four stroke
Topic: steering damper knob coming loose
Replies: 8
Views: 620

Re: steering damper knob coming loose

Paul Jameson- My apologies for the mis-information. I was looking at an earlier yoke (H59-46) and it appeared that the steering column was a push fit into the bottom yoke with the pin acting as a cotter. Looking at another one more closely it is clearly a brazed joint and doesn't need a pin. Paul Le...
by Pete.Silson
Wed Oct 21, 2020 8:16 pm
Forum: Four stroke
Topic: steering damper knob coming loose
Replies: 8
Views: 620

Re: steering damper knob coming loose

I am missing... ...the pin through the yoke into the damper rod Preventing the steering damper rod from falling out is only a coincidental function of the pin through the lower yoke. The pin's primary purpose is to mechanically fix the lower yoke to the vertical tube of the steering column. Operati...
by Pete.Silson
Wed Sep 23, 2020 7:36 am
Forum: Ariel Talk
Topic: ... And now the lower Chain Guard to mount!
Replies: 10
Views: 594

Re: ... And now the lower Chain Guard to mount!

Gary

Yours looks like a lower guard from a SQ4 spring frame. The single rigid one looks like:
5722-36 (rigid single lower) 1a.jpg

Sorry I don't have a picture of one fitted at the moment. Incidentally the picture of a rigid lower chainguard (5722-36) on the Draganfly site is wrong.

Pete
by Pete.Silson
Mon Sep 14, 2020 7:22 pm
Forum: Four stroke
Topic: Charging issue with 58 Huntmaster
Replies: 6
Views: 337

Re: Charging issue with 58 Huntmaster

Nick,

Digital multimeters are not very good at measuring dynamo voltage because of all the electrical noise they generate. You might get a more usable reading using an old fashioned analogue moving-coil meter.

Pete
by Pete.Silson
Mon Aug 31, 2020 5:25 pm
Forum: Four stroke
Topic: Type 6 carburettor needle jet sizes
Replies: 1
Views: 505

Type 6 carburettor needle jet sizes

My iron VH is fitted with an Amal 89 carb and has run a tad rich mid-thottle since I got it back on the road so I am trying to sort out the carburation. The needle is right down to the top notch and it is still a bit lumpy so I checked the needle jet and found it was 107 rather than the standard 106...
by Pete.Silson
Wed Aug 26, 2020 11:42 am
Forum: Ariel Talk
Topic: VB rear upper chain guard
Replies: 12
Views: 729

Re: VB rear upper chain guard

...what the black slot headed screws at the bottom end does? Nothing - It fills a hole that had been drilled in the chainguard where it had been bodge by a previous owner to fit a different stay. ...your mud guard doesn't appear to have a removable or hinged rear portion to allow the wheel to be ea...
by Pete.Silson
Tue Aug 25, 2020 7:48 am
Forum: Ariel Talk
Topic: VB rear upper chain guard
Replies: 12
Views: 729

Re: VB rear upper chain guard

This picture is a 1949 rigid with a different mudguard but the stay is the same as a '46. The threaded hole (1/4" 26 tpi) on the top of the chainguard bolts to a small bracket on the inside of the stay.
stay.JPG

Pete

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