Author Topic: C15 timing  (Read 837 times)

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DEAN SOUTHALL

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Re: C15 timing
« Reply #15 on: 13 August, 2017, 17:54:47 »
Good luck Tim
I know how frustrating all this can be but one day soon you'll be wizzing  along on her with a group of mates and this will all be a faint memory.
cheers Dean

SIE7RA

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Re: C15 timing
« Reply #16 on: 13 August, 2017, 22:05:31 »
.280 is correct for fully advanced timing,Make sure the bob weights are fully open when setting timing by inserting something between them

TIGERJ

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Re: C15 timing
« Reply #17 on: 14 August, 2017, 21:34:13 »
C15 update
Re-timing yet again to the latest advance
NO BETTER
Now convinced the problem is the advance springs
With engine at tickover slight increase in revs gives full centrifugal advance
So sure this is not correct
NEED NEW SPRINGS BUT CANNOT FIND A SUPPLIER
CAN ANYONE HELP
Tim

DEAN SOUTHALL

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Re: C15 timing
« Reply #18 on: 14 August, 2017, 21:57:16 »
Have you thought of electronic ignition? Less than 100 for a Boyer for the C15 and once set up you can forget about it. No need for mechanical advance, points etc.

TIGERJ

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Re: C15 timing
« Reply #19 on: 15 August, 2017, 06:12:06 »
Many thanks for your reply.
I may have to follow that route even though I spent on new 6v kit.

TIGERJ

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Re: C15 timing
« Reply #20 on: 15 August, 2017, 06:25:31 »
Does anyone know if the if the advance springs on a distributor bike are the same as fitted
to the side points model ?
Or any associated part numbers ?
Or any specifications of the springs ?

JulianS

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Re: C15 timing
« Reply #21 on: 15 August, 2017, 09:45:05 »
Photos below, first from 1964 Lucas Equipment for BSA, second the 1965 issue, third the parts fitted to BSA from 1965 issue.

Might help you figure out the spring numbers.

I would phone some of the larger dealers, C and D Autos for example.

You can see the distributor springs are different parts.

If your a/r is giving trouble electronic is the way to go.

DEAN SOUTHALL

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Re: C15 timing
« Reply #22 on: 15 August, 2017, 10:26:34 »
Many thanks for your reply.
I may have to follow that route even though I spent on new 6v kit.

6V electronic ignitions are readily available.

TIGERJ

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Re: C15 timing
« Reply #23 on: 19 August, 2017, 19:09:30 »
TODAY IS GREAT DAY
Decided to stick with the old set up for the time.
Side points advance springs are stocked by Greystone tiger cub parts.
With the new springs running much better BUT not revving much past 1/4
So to the carburettor
Some of you will remember I have an Amal 375 fitted to SS80
So jetting was experimental
Ended up with 180 main
With needle set to middle position running better than ever
Bike is now revving freely
MANY THANKS FOR ALL THE GREAT ADVICE
I remember Arther warning to expect engine problems
He was correct
Regards
           Tim