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by nevhunter
Tue Aug 18, 2020 12:58 am
Forum: Four stroke
Topic: Sticking exhaust valve?
Replies: 28
Views: 891

Re: Sticking exhaust valve?

Some of those valve caps are too hard but yours had a good excuse for breaking. Re lap your head face and continue on the outer face after you have cleaned and oiled the inner one. Nev
by nevhunter
Mon Aug 17, 2020 12:56 pm
Forum: Ariel Talk
Topic: Engine rebuild - W/NG
Replies: 43
Views: 2003

Re: Engine rebuild - W/NG

It would be likely that making a batch of new cylinder barrels would be the answer. They are simple as. Nev
by nevhunter
Mon Aug 17, 2020 5:04 am
Forum: Four stroke
Topic: VG big end and flywheel assembly
Replies: 19
Views: 416

Re: VG big end and flywheel assembly

There's Plenty of the 15/16th pins around. I've got 2 new ones I've had for ever. If you have too much interference there, you usually scour out some metal from the flywheel and are then in strife. That set up runs a cage but it works OK without it Like the taper pin variety.. A smidgen under one th...
by nevhunter
Mon Aug 17, 2020 4:12 am
Forum: Ariel Talk
Topic: Engine rebuild - W/NG
Replies: 43
Views: 2003

Re: Engine rebuild - W/NG

There were also sleeves supplied but you bore a fair it out to fit a sleeve and they don't add to it's tensile strength. 350 Ariel barrels are a bit renown for coming off with High comp racing motors even in the 50's.If it's sloppy on plus .040" its a semi finished after market piston of which ...
by nevhunter
Fri Aug 14, 2020 2:56 am
Forum: Four stroke
Topic: Sticking exhaust valve?
Replies: 28
Views: 891

Re: Sticking exhaust valve?

Whether the guides are affected by additives (as mine was) or seizing (galling) will only be known by having a look at how it's all wearing . If it's stuck at any time chances are the valves will have contacted either each other and/or the piston at some stage and should be checked for bending or an...
by nevhunter
Thu Aug 13, 2020 3:52 am
Forum: Ariel Talk
Topic: GB GEARBOX PLAY
Replies: 20
Views: 741

Re: GB GEARBOX PLAY

The layshaft end play is OK. The mainshaft nut doesn't tighten to anything but the shaft It can't be tightened too zealously as the shaft is hollow and the nut is soft. I've resorted to using loctite on the nut threads to make sure it stays there.Nev
by nevhunter
Thu Aug 13, 2020 1:11 am
Forum: Four stroke
Topic: Sticking exhaust valve?
Replies: 28
Views: 891

Re: Sticking exhaust valve?

Some anti friction additives can make exhaust valves stick on hot running cast iron heads run a bit quickly. The clearance in the EXHAUST guide should be about .0025" minimum with a good finish.. Ideally the hardened CAP will be a tight fit on the valve end. The valve will probably have hit the...
by nevhunter
Tue Aug 11, 2020 1:51 am
Forum: Ariel Talk
Topic: Engine rebuild - W/NG
Replies: 43
Views: 2003

Re: Engine rebuild - W/NG

They usually break off as the weld is just a tack. You can't use a normal type seal as the gearbox has to be able to be adjusted back and forward Check for the spacer 2'' long between the rear engine plates on the long stud for the footrests. IF it's missing the plates will be distorted. Note the fi...
by nevhunter
Mon Aug 10, 2020 3:01 am
Forum: Ariel Talk
Topic: KH update.
Replies: 7
Views: 312

Re: KH update.

I think you will find it quite a nice bike in a lot of ways. They are very easy to start due long kicker and being a 500 twin with auto advance. I have a similar with Anstey rear end but I've not ridden it far and noticed it wasn't really good balance as far as the motor was concerned, so I will do ...
by nevhunter
Fri Aug 07, 2020 3:25 am
Forum: Ariel Talk
Topic: Engine rebuild - W/NG
Replies: 43
Views: 2003

Re: Engine rebuild - W/NG

It's the heart of the engine. I see a lot of them not done well. That's why I do ALL my own and a few others . Some "wheels" are pretty SAD in the tapers. Some are real good and can set up with a straight edge..IF you know someone who you can trust get it done by them. You have a BIKE that...

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