Search found 44 matches

by david.birkett
Sun Mar 23, 2025 1:23 pm
Forum: Four stroke
Topic: '57 NH forks
Replies: 1
Views: 925

'57 NH forks

What grade of oil and how much is needed to service the tele forks?
by david.birkett
Sat Dec 30, 2023 4:49 pm
Forum: Four stroke
Topic: '57 NH petrol tank knee pads.
Replies: 2
Views: 714

Re: '57 NH petrol tank knee pads.

Thanks Julian, I'll take a brave pill and give it a go.
by david.birkett
Sun Dec 17, 2023 2:40 pm
Forum: Four stroke
Topic: '57 NH petrol tank knee pads.
Replies: 2
Views: 714

'57 NH petrol tank knee pads.

The tank is being re sprayed and I'm wondering how I will get the knee pads back on without damaging the paint. Hints, tips and advice will be gratefully received.
by david.birkett
Sun Dec 17, 2023 2:34 pm
Forum: Four stroke
Topic: petrol tank cap washer
Replies: 13
Views: 2593

Re: petrol tank cap washer

I use thin (about .045") leather salvaged from the back of a scrapped armchair. It was still on my '56 FH when I sold it after years of service.
by david.birkett
Wed Jan 04, 2023 9:38 pm
Forum: Four stroke
Topic: '57 NH pistons
Replies: 4
Views: 716

Re: '57 NH pistons

Thanks Pete, the piston in it had three compression rings and a very thick layer of coke on the top.
Regards, David.
by david.birkett
Wed Jan 04, 2023 1:07 pm
Forum: Four stroke
Topic: '57 NH pistons
Replies: 4
Views: 716

'57 NH pistons

I'm confused by the way NH pistons are advertised for sale, what is the difference between pre and post '55 pistons and who are the best vendors?
All advice gratefully received,
David.
by david.birkett
Sun Jan 01, 2023 2:14 pm
Forum: Four stroke
Topic: '57 NH Exhaust valve guides
Replies: 5
Views: 722

Re: '57 NH Exhaust valve guides

Many thanks for the reassuring and helpful replies. The o.d. of the guide hole is .6251 at the top and .6251 at the bottom, so not a disaster. Once again this forum has given me the information I need. I'll be messaging single spares. Three cheers for the AOMCC
David.
by david.birkett
Sat Dec 31, 2022 4:24 pm
Forum: Four stroke
Topic: '57 NH Exhaust valve guides
Replies: 5
Views: 722

'57 NH Exhaust valve guides

Exhaust valve guide rotating easily and slight up and down movement. slipped out easily once coke at the valve end was scraped off. Guide O.D. is 0.625". Draganfly show guide p/no 494-56 but no mention of size. Are oversize valve guides available? Happy New Year to all you Arielists, David.
by david.birkett
Tue Jul 19, 2022 6:16 pm
Forum: Four stroke
Topic: 1954 NH first proper shake down rides
Replies: 34
Views: 4291

Re: 1954 NH first proper shake down rides

I had this transmission slip problem with my '57 NH after refitting the primary drive and clutch. Problem went away after increasing the tension on the shock absorber spring.

Regards,David.
by david.birkett
Tue Jul 19, 2022 6:01 pm
Forum: Four stroke
Topic: PRIMARY CHAINCASE CLUTCH SHAFT SEAL-4 stroke
Replies: 18
Views: 2226

Re: PRIMARY CHAINCASE CLUTCH SHAFT SEAL-4 stroke

I had this problem with my '57 FH and now I've got it with my '57 NH. I agree with Mick, any more oil than just enough to touch the chain gets wasted. If I can touch the chain through the filler hole and feel oil, so far as I'm concerned it is ok.
Regards, David.