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British Bikes / Re: Auto advance
« Last post by iansoady on January 30, 2019, 10:59:55 AM »
That advance figure is probably for full retard. It's usually better to time on full advance as that's where the engine spends most of its time. But if that's the only figure you've got then that's what you'll have to use.

Capacitor is the modern name for condenser. They're cheap enough and always worth replacing.
British Bikes / Re: Auto advance
« Last post by JohnnyT on January 30, 2019, 10:14:07 AM »
I have new carb and plugs.With wet plugs I know fuel is getting through.Do you mean condenser John K? The manual says 5 dg btdc for points opening used to being 17 ish on my 2 stroke Lambrettas.Is there such a difference on 4 strokes?
British Bikes / Re: Auto advance
« Last post by R on January 29, 2019, 09:55:09 PM »
Wet plugs  ?

Always worth trying new plugs when that happens,
especially after standing for years....
British Bikes / Re: Auto advance
« Last post by TGR90B on January 29, 2019, 06:05:47 PM »
Good tip, but if it's been standing many years I'd strip the carb, especially as you say you've got a good spark. Fresh fuel goes without saying.
British Bikes / Re: Auto advance
« Last post by john.k on January 29, 2019, 10:52:27 AM »
Its likely a new capacitor is needed...........the spark may not be as strong as you think.
British Bikes / Auto advance
« Last post by JohnnyT on January 29, 2019, 10:12:20 AM »
Having trouble firing up my Tigress.Ive got good spark and wet plugs,but only getting the occaisonal pop.Could the auto advance which looks standard Triumph effect starting,or does it come in later ? The scooter was standing for many years and I cleaned the auto advance up,but it could be a little stiff.
British Bikes / Re: Fuel tank liner.
« Last post by Grunt on January 28, 2019, 07:15:14 PM »
I want to do the tractor tank just in case there are some holes still waiting to be discovered. Both the bike tanks are sound, I didnít realise it was just the fact that ethanol attracted water which caused the problems. So I shanít do anything with them.
British Bikes / Re: Is a Sunbeam S8 capable of cruising at 57mph?
« Last post by mini-me on January 28, 2019, 02:09:23 PM »
I've been browsing through some 1949 bike mags and the small ads for 1949 show in iteresting amount of nearly new S8 for sale.

I wonder why?

British Bikes / Re: Fuel tank liner.
« Last post by 33d6 on January 28, 2019, 04:21:43 AM »
Fuel tanks aren't destroyed by ethanol. They rust out far more quickly is all. Ethanol is hygroscopic, water loves it. Water accumulates at the bottom of the tank to rust it out far more quickly than it used to in pre ethanol days. Of course the fact that newer tanks are made of a lighter gauge material than older tanks and therefore rust through more quickly anyway doesn't help either.  The major problem with bikes is too many people don't actually use their bikes but let them sit for long periods and then moan when they don't run properly on the odd occasion they're dragged out. Frequent use with fresh petrol continually flowing through the system is much better than letting the bike sit.

I can't see why you would line a diesel fuel tank. No ethanol content in diesel is there but you can have the standard problem of water condensate in the fuel if the thing is left idle for weeks at a time. That is why you often find on heavy equipment a decent cup sized indentation with a drain tap on the bottom of the tank so you can drain out the condensate before it gives any bother. It's just a standard maintenance thing which most owners either don't bother with or don't understand the reasons for. It's a self inflicted problem.

Just try riding your bikes before faffing about with tank liners. It's an uncommon way of preventing trouble but it seems to work.


British Bikes / Re: Fuel tank liner.
« Last post by Grunt on January 28, 2019, 12:51:53 AM »
Thanks for the replies. It seems that Petseal has been the main reason that chemical liners have got a bad name.

How much does anyone believe the manufacturers of the chemical liners claims that the ethanol based fuels will attack just about any fuel tank known to mankind. It doesnít ring true to me that fuel manufacturers would be allowed to sell something that is likely to destroy a fuel tank to the extent that some would have us believe.
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