Recent Posts

91

Frame / Clutch perch (mount)

« Last post by Sunbeam on 16.12. 2024 14:41 »

Could anyone recognise if the perch in the photo is Amal, I'm using it for my combination brake / air lever. I'm after a mirror version (7/8 pivot) to use on my clutch lever with magneto adv / retard lever (combination). The handlebar mount is drilled straight through and the perch cable adjuster is threaded. If anyone knows a supplier I'd be grateful , everything on Ebay seems to be 1-1/16 pivot...many thanks.

92

Gearbox, Clutch, Primary / Re: Difference between plunger and swing arm layshaft

« Last post by a10rgs on 16.12. 2024 14:12 »

Hi Swarfy,

many thanks for your quick reply!

Uwe

93

Amal, Carburation / Re: rich on one side

« Last post by berger on 16.12. 2024 12:41 »

Macbeth that looks like the washer i took out of a kitchen tap the other day that was dripping and doing my head in. as for the carb the brand new mik i put on mine didn't stay on long because i didn't get on with it and put a new amal type on. the only thing i know is that after starting with the choke on and then pulling up the lever and going about a mile it was chocking itself, this is when i pulled the lever up some more which didn't appear to have any discerning movement but it cured it.

94

Gearbox, Clutch, Primary / Re: Difference between plunger and swing arm layshaft

« Last post by Swarfcut on 16.12. 2024 12:13 »

Quick answer is that dimensionally and splinewise they are identical, so either will fit.

BUT....pressed on layshaft pinion drive gears differ, the drive dogs have a different profile, and the locating circlip groove position is also different. As an assembly, these three parts ( layshaft, pinion and the third gear layshaft 23 tooth sliding gear) can be used for either box.

 S/A layshaft has oil spiral groove at blind bush end, Plunger is plain shaft.  Both carry the same speedo drive gear.

 Swarfy.

95

Gearbox, Clutch, Primary / Difference between plunger and swing arm layshaft

« Last post by a10rgs on 16.12. 2024 11:39 »

Hi,

can anybody tell me what the difference between the plunger G/B and the swing arm G/B layshaft is?

Regards
Uwe

96

A7 1946-1950 / Re: A7 compression

« Last post by Triton Thrasher on 16.12. 2024 10:15 »

That’s the lowest compression I’ve ever heard of on an engine that’s supposed to be a runner.

Are you sure you’re getting a proper compression test?

97

A7 1946-1950 / Re: A7 compression

« Last post by Swarfcut on 16.12. 2024 10:11 »

 Another conundrum! Hard to turn over, but in my estimation poor compression so a poor starter.
 
 With plugs out it should spin with little effort. With plugs back in it should almost support your body weight on the kicker. If all is in order mechanically, ignition, timing, tappet clearances etc my guess is that the rings have not sealed and a slug of oil down each bore is worth a try.  A stubborn case like this needs more continued effort than a single kick, and a roller starter or tow start along with a quick spray is a possible solution.*
   Rob's certainly on the money here.


 Swarfy.


 * Ford Escort Van with stuck rings took a couple of miles of towing to eventually come alive after a long sleep back in the '80's. Thank goodness for simple mechanicals! Ran fine for years after that.

98

Chat, Offtopic & Everything Else / Re: Plums!

« Last post by Rex on 16.12. 2024 09:23 »

Overall society would reap the benefits of reduced crime, happier general population, less anxiety, stress and illness etc.

I suppose that depends on whether you believe criminals are criminals because they're hungry, or because they see it as an easier and more lucrative way to live than punching clock.
The first choice is amazingly naive in my view, and even if they were given this basic amount they'd still go out and commit crimes. Those massive 4X4's and Porsches don't pay for themselves after all.

99

Chat, Offtopic & Everything Else / Re: Plums!

« Last post by Catz on 16.12. 2024 09:09 »

..... a bit like a utopia. Nah, wouldn't work. Too many people would want more than their fair share.

100

A7 1946-1950 / Re: A7 compression

« Last post by limeyrob on 16.12. 2024 08:42 »

I could not start my rebuilt 350 Matchless.  The engines was OK to turn over but just a bit too stiff to kick at a speed that you create a good spark.
After many attempts and getting worn out I bought a 12v roller starter. I then took the plug out and motored it 5 mins at a time  for about  an hour.  It got much freer  and I was able to start is on the roller.  After about 2 hours total running it span and started fine on the kick starter.
When I rebuilt to Road Rocket I didn't waste time try to kick it until I'd motored it for a decent period on the roller.  Now even with 8.5:1 ist an easy starter.
While the roller / pit starter got me out of a hole it was poorly made and poor value.  If you can borrow a good one that may be the best solution. The problem is that 100 slow kicks will not start an engine with a magneto when 2 hard ones will.