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by nevhunter
Sat Oct 20, 2018 2:50 am
Forum: Main Chat Forum
Topic: cleaning off crankcases
Replies: 15
Views: 411

Re: cleaning off crankcases

New glass beads do a better job than when they have shattered when they make a finish that seems to attract dirt. On aircraft components walnut shells are about all that's allowed legally. They have quite strict requirements.. Vapour blasting seems to produce a finish that doesn't hold dirt but is a...
by nevhunter
Fri Oct 19, 2018 11:28 pm
Forum: Four stroke
Topic: SQ4 Misfire
Replies: 38
Views: 1349

Re: SQ4 Misfire

A good condition battery has a low resistance and acts as a limiter of surge voltages . If you disconnect the battery you usually blow the stop lamp bulb Voltage regulation usually responds to voltage and current limiting parameters. Once the battery reaches the voltage where it's fully charged the ...
by nevhunter
Fri Oct 19, 2018 11:16 pm
Forum: Main Chat Forum
Topic: cleaning off crankcases
Replies: 15
Views: 411

Re: cleaning off crankcases

Some blasting techniques produce a surface that holds dirt and is very difficult to clean subsequently. Clean every trace out of threads and oilways .If the motor has inbuilt flap valves they may be effectively ruined byfine glass particles. The original "as cast" surface is very nice if y...
by nevhunter
Fri Oct 19, 2018 3:06 am
Forum: Four stroke
Topic: SQ4 Misfire
Replies: 38
Views: 1349

Re: SQ4 Misfire

A good battery will hold the charge volts down until nearly fully charged, Nev
by nevhunter
Thu Oct 18, 2018 10:00 pm
Forum: Main Chat Forum
Topic: VCH.
Replies: 6
Views: 310

Re: VCH.

The earlier one (probably straight from the OH although it may be slightly beefed up,) achieves the shortening of the wheelbase where the rear wheel is noticeably up close to the gearbox, so the adjuster then protrudes through the original rear alloy mudguard. The later fitting perhaps is less forwa...
by nevhunter
Thu Oct 18, 2018 12:05 am
Forum: Main Chat Forum
Topic: cleaning off crankcases
Replies: 15
Views: 411

Re: cleaning off crankcases

Genthin ( general thinners)in old transmission fluid . Leave soak or sit for a while and then use an old toothbrush or suede shoe brush and kerosene. Nev
by nevhunter
Wed Oct 17, 2018 5:15 am
Forum: Main Chat Forum
Topic: VCH.
Replies: 6
Views: 310

Re: VCH.

The fitting around the rear axle is quite different to the standard frame. I'm not sure if there's one to view on file. The number should be COM XXX. That oil tank is from a colt. They fit straight on but are more bulged out .Nev
by nevhunter
Tue Oct 16, 2018 5:20 am
Forum: W/NG Technical
Topic: Speedo gearbox question
Replies: 25
Views: 1095

Re: Speedo gearbox question

I have just checked 3 different W/NG front wheels and the 14 /43 external gears and the internal ratio of 8: 12 as per Alan's post is confirmed. so the 12 % error may be expected, if the speedo itself is the same. Nev
by nevhunter
Mon Oct 15, 2018 10:42 pm
Forum: Four stroke
Topic: SQ4 Misfire
Replies: 38
Views: 1349

Re: SQ4 Misfire

The lighter spring controls the initial advance which comes in just above idle speed. The heavy one has to be slack at this time (has lost motion) Yours may be incorrectly set up . The only way to really know is plot the advance curve on an appropriate machine. While these things may cause a power l...
by nevhunter
Mon Oct 15, 2018 10:33 pm
Forum: Ariel Talk
Topic: Vtwin scandal
Replies: 32
Views: 689

Re: Vtwin scandal

If Auctioneers knowingly avoid describing the article honestly they should not be allowed profit by the omission. Their "standing " should suffer. Being able to rely on the description of the article as accurate is an essential part of the integrity of the system. Prices vary enormously de...

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