I've managed to acquire this lovely C15 this week. It was a blind ebay purchase so it has some bits to sort no doubt. I'm a total novice to classic bikes as well so a long term project !
2 questions first if I may, it has an SS prefix to the engine number, does this mean it's a sports star and if so what does that mean specificall?
The other one being the carb has no air cleaner on it, and no room to put one I don't think..........
The C15 Sports Star had a more highly tuned engine than the standard C15 and a larger carb to suit. It also has roller big end bearings which were much more rugged than the standard plain bearing. The C15 used a thin filter arrangement mounted just behind the rear panel with a rubber hose connecting it to the carb - I beleive the SS was the same.
Below is the C15SS 80 from 1962 catalogue.
It looks like standard C15 colours so it could be a originally have been standard bike with SS80 engine fitted later in its life.
Just bringing this thread back to life, the bike is now out on the road and I've done about 30 miles on it. It's not really idling properly and I've had to turn the idle adjuster up so it doesn't keep stalling. Its riedable but wants to run on all the time so needs sorting.
Someone said it's the wrong carb, i'm new to this so not sure which one specifically it should have, it's the SS80 engine.
I wondered if I'm better off buying a new one thats the right match for the engine or whether I should get the current one off and get it cleaned and set up right ?
The ss 80 model had-
A sportier cam.
Comp ratio raised to 8.5/1
Slightly bigger inlet valve.
Should reach 80 MPH. (Mine does).
Mick
Fastmonkey, I'd definitely investigate your current carburettor before shelling out for a new one: get it ultrasonically cleaned, new gaskets etc, and check the jetting inside. Then you'll see if it can be set up correctly.
Hi,
Hope this helps:
http://amalcarb.co.uk/carbspec/carburettor/spares/id/4874/
Best wishes...
Quote from: Mark B on 07 Jan, 2019, 12:57
Fastmonkey, I'd definitely investigate your current carburettor before shelling out for a new one: get it ultrasonically cleaned, new gaskets etc, and check the jetting inside. Then you'll see if it can be set up correctly.
Ok, how difficult a job is it to strip it down and learn what's wrong. I'm a complete novice when it comes to carbs but have some basic mechanical competency ?
Quote from: Bess on 07 Jan, 2019, 13:41
Hi,
Hope this helps:
http://amalcarb.co.uk/carbspec/carburettor/spares/id/4874/
Best wishes...
That's very useful. Thanks.
Hi,
Lots of useful info here:
http://amalcarb.co.uk/technical/
http://amalcarb.co.uk/downloads/
Best wishes...