[andyfrost]

Enjoy this great hobby , like your thoughts , all my machines have to start and do a days work.
I’ve just rebuilt a BSA 120 on a Demon , now starts first pull and runs like a clock.
One thing you will find , all on here have an enormous wealth of knowledge , on a vast array of machines , that they are all very willing to share.

Andy.

[andyfrost]

Chris , I’ve sent you a PM.

Andy

[andyfrost]

Chris , many thanks for posting , it’s actually on a 400.

Andy.

[andyfrost]

Your coil needs to be tested using a proper ignition tester , multimeters and the like are no good for testing coils.

Andy.

[andyfrost]

Have you had the coil tested , 120cc components were Lucas , and generally very reliable , never be put off by the visual appearance of a coil , testing it would be my first course of action.

Andy.

[andyfrost]

Charlie , before you start trying to remove them , if you know anybody with an ultrasonic cleaner try that route first , they really are amazing bits of kit.

Andy.

[andyfrost]

I can’t seem to enlarge the pics , but the smaller one looks very much a Model O , 34cc , the bigger one is a model 80 80cc.

Andy.

[andyfrost]

the variable jet is handy if you have slight wear in the butterfly , you can simply richen the mixture accordingly.
Very good secondhand carbs come up for sale very frequently on that certain auction site , I would never consider buying new , remember this carb was fitted to huge range of engines , and indeed quite a few full size tractors.

Andy.

[andyfrost]

It’s simply not worth the hassle , the 24T2 was far and away the best carb fitted , and ALL parts are now so readily available , at very reasonable coinage.
Only one modification I would make is doing away with the fixed jet, and fitting a variable one.

Andy.

[andyfrost]

Tony , for that not much money , Villiersparts will supply a kit for you carb.

Andy.

[andyfrost]

Got it also , she said she may have something of interest for me !! , I don’t suppose she collects Simars by any chance.

Andy.

[andyfrost]

Joe , it’s difficult to say without actually “being there” , but I am from the school that taught me that the vast majority of carb issues are more often than not electrical.

Andy.

[andyfrost]

VERY nice Geoff , I’m hoping to bring a nice original Earthquake to Weeley this year.

Andy.

[andyfrost]

Joe , firstly try what you have been doing DIRECT off the end of the HT lead and get back to us.
NEVER try or use old plugs , there’s usually a very good reason why they were taken out and “put in the spares box” in the first place.
From your description it does sound like a duff magneto , if this proves to be the case , have it professionally tested and go from there.

Andy.

[andyfrost]

Get a selection of imperial woodruff keys ……..job sorted.

Andy.

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