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by Simonjones
Fri Dec 28, 2018 8:27 pm
Forum: Four stroke
Topic: FH primary alignment?
Replies: 3
Views: 411

Re: FH primary alignment?

:) Thanks for the replies chaps. Yes Simon, I will look into what can be done with the engine sprocket although I don’t recall there being a space behind it on the BSA. I think the engine sprocket has a shoulder on the back of it that gives it the spacing. Of cause I could get that machined down sli...
by Simonjones
Wed Dec 26, 2018 8:05 pm
Forum: Four stroke
Topic: FH primary alignment?
Replies: 3
Views: 411

FH primary alignment?

Hi guys. I’ve fitted a BSA A10 into a 58 Ariel frame. I assumed that this would be an easy enough job as I thought the engine was basically the same in many ways to the FH. Well I’ve already found that it isn’t quite the same as FH engine plates weren’t quite right to pick up the mounting holes in t...
by Simonjones
Sun Oct 21, 2018 8:53 pm
Forum: For sale/wanted - Parts
Topic: For sale: NH engine, carb, mag
Replies: 0
Views: 522

For sale: NH engine, carb, mag

Due to the fact that I have acquired a 650 engine for my special, I have for sale a freshly re-built ally head NH 350 engine. Only covered 200 miles New main bearings, seal, nos WNG piston and re-bore, valves. Runs very well £500 Recently re-built M01 magneto £200 New (apart from covering 200 miles)...
by Simonjones
Tue Oct 02, 2018 9:37 pm
Forum: For sale/wanted - Parts
Topic: 1930’s square 4 engine
Replies: 0
Views: 534

1930’s square 4 engine

Not mine and I don’t know any details other than it’s a 600cc ohv. 07399409535
by Simonjones
Sun Sep 16, 2018 8:24 pm
Forum: Four stroke
Topic: Lack of power
Replies: 25
Views: 1714

Re: Lack of power

I’m not in any way an expert but I had similar power issues with my ally head NH when it got hot. I have a feeling mine was at least partially caused on the fueling side of things. It seams better after fitting an insulating spacer between carb and head.
by Simonjones
Wed Sep 05, 2018 12:47 pm
Forum: Four stroke
Topic: 376 monoblock advice.
Replies: 9
Views: 677

Re: 376 monoblock advice.

Could be really interesting to have a go at that.

Thanks again John :D
by Simonjones
Tue Sep 04, 2018 9:45 pm
Forum: Four stroke
Topic: 376 monoblock advice.
Replies: 9
Views: 677

Re: 376 monoblock advice.

Yes.. Another good point. Wouldn’t it be nice to have a range of different jets, slides etc I gave Amal a call today and described what I’d tried with needle height etc. The guy I spoke to kindly offered to send me a smaller pilot jet free of charge as he thought it sounded like it wouldn’t be a mai...
by Simonjones
Tue Sep 04, 2018 6:41 pm
Forum: Four stroke
Topic: 376 monoblock advice.
Replies: 9
Views: 677

Re: 376 monoblock advice.

Thanks John. Yes, good point. I’ll check the float level. I have to admit, i don’t fully understand how to do it yet.
by Simonjones
Tue Sep 04, 2018 6:38 am
Forum: Four stroke
Topic: 376 monoblock advice.
Replies: 9
Views: 677

Re: 376 monoblock advice.

Hmm.. Thanks Dave. I agree, It would appear to need jetting down but the 376 with a 200 main is listed as correct for a late NH. The chart on Drags website doesn’t show a 376 with anything less than that in fact. 276 are listed with a 150 for earlier NH’s Maybe using an early low compression piston ...
by Simonjones
Mon Sep 03, 2018 9:09 pm
Forum: Four stroke
Topic: 376 monoblock advice.
Replies: 9
Views: 677

376 monoblock advice.

Hi all. I’ve got about 130 miles of running in done on my NH. I decided to buy a brand new carb for it but it seems too rich. So here’s what I’m running.. 58 cylinder and ally head WNG+20 piston Straight through exhaust New Amal 376/8 jetted 106, 25, 200 Conical air filter. Ran a bit woolly and the ...

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