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by Pete.Silson
Fri Feb 19, 2021 7:38 pm
Forum: Four stroke
Topic: Best material for steel pushrods
Replies: 5
Views: 203

Re: Best material for steel pushrods

...would you explain exactly how the ends were removed? My donor tubes were damaged already so I simple cut them and used a 5/16 bar to tap off the ends from the inside. If you don't want to damage the tubes (e.g. just shortening longer ones), I would suggest a split die with a 7/16" hole plac...
by Pete.Silson
Fri Feb 19, 2021 3:23 pm
Forum: Four stroke
Topic: Best material for steel pushrods
Replies: 5
Views: 203

Best material for steel pushrods

I need to make some new pushrods for an iron VH. I have removed the end fittings from some old NH pushrods and the old tube appears to be 7/16"x20G steel of some kind. What is the best material for the new (longer) pushrods? I have some 316Lx20G seamless stainless tube that seems to be about th...
by Pete.Silson
Wed Feb 10, 2021 11:02 am
Forum: Four stroke
Topic: 350 iron head vs. 500 iron head
Replies: 4
Views: 395

Re: 350 iron head vs. 500 iron head

500 - 85.5mm
350 - 76.5mm

The two measurements are from slightly different generation heads. The 350 is from a '47 and the 500 is a later "big fin" head. I don't know if that makes any difference.

I hope this helps, Pete
by Pete.Silson
Tue Feb 09, 2021 2:29 pm
Forum: Four stroke
Topic: 350 iron head vs. 500 iron head
Replies: 4
Views: 395

Re: 350 iron head vs. 500 iron head

The 500 is about 18mm higher from a quick measurement from crankcase mouth to rockerbox.

This the difference of combined barrel and head - I can measure head and barrel separately if you need.

Pete
by Pete.Silson
Tue Feb 09, 2021 11:18 am
Forum: W/NG General
Topic: Engine query
Replies: 8
Views: 617

Re: Engine query

Richard
...intriguing that a correct engine was sourced so late in the day...

BK crankcases seem to come up on Ebay quite regularly - I think there were quite a few of them made.

http://www.ebay.co.uk/itm/264885164794

Pete
by Pete.Silson
Sat Feb 06, 2021 5:31 pm
Forum: Four stroke
Topic: Barrel Off NH
Replies: 12
Views: 425

Re: Barrel Off NH

Mike Only use a six-sided socket and make sure the socket is slim enough to fully engage on the sludgetrap hex. It is quite easy to mangle the head. See previous post: http://forum.arielownersmcc.co.uk/viewtopic.php?f=21&t=11360&p=78875&hilit=sludge+trap#p78867 Pete
by Pete.Silson
Thu Jan 28, 2021 2:11 pm
Forum: Ariel Talk
Topic: Factory side stand
Replies: 14
Views: 636

Re: Factory side stand

Wade, I believe that the milled slot is only needed for the SQ4 crankcases not singles. It looks like the one you have there is off a SQ4 so you will need to source a shorter spacer and a shorter bolt as I think the plates are also closer together on a single. The pin is just a short threaded stud t...
by Pete.Silson
Wed Jan 27, 2021 10:52 am
Forum: Ariel Talk
Topic: Factory side stand
Replies: 14
Views: 636

Re: Factory side stand

It goes through the larger holes on the front of the engine plate with a spacer between the plates. The one below is on a SQ4 but the same on singles I believe.
sidestand.jpg

sidestand parts.jpg

Pete
by Pete.Silson
Fri Jan 08, 2021 10:58 am
Forum: Main Chat Forum
Topic: Burman GB Main-shaft Identification
Replies: 3
Views: 318

Re: Burman GB Main-shaft Identification

Ariel Arrow Mainshaft.
Ariel Arrow Mainshaft.jpg

Pete
by Pete.Silson
Sun Jan 03, 2021 11:29 am
Forum: Four stroke
Topic: Help needed with BA gearbox rebuild
Replies: 7
Views: 430

Re: Help needed with BA gearbox rebuild

The picture looks to me like a post 1948 mainshaft (longer clutch centre splines). The SQ4 BA mainshaft is longer (303mm) than for BA singles (294mm). I can't really make out the length from your picture but it looks to be less than 300mm so you may have a mainshaft from a single. Using a shorter ma...

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