SOHC.co.uk Forums > SOHC Singles & Twins
CB72 Keyster Carb Kits - are they any good?
MrDavo:
Interesting. I used a non original carb kit from Silvers on my CL450, out of necessity, and could not get a tickover until I went back to the original air screws and float needles, on the grounds that they weren’t visibly worn, and I knew they were right for the bike.
That said, on that bike getting the float heights right was half the battle. A height gauge made from a business card, cut to the measurements in the workshop manual turned out to be essential, as well as free.
Oggie400F:
Thanks for the advice.
The Keyster kits are mainly going to be used for all of the seals as these have perished and appear to be unobtainable as individual items.
All of the jets, needles and screws look like they are in good shape so the intention is to reuse as many as or all of them if possible.
flatfour:
I've fitted these kits to both my CB750 and (when I owned it) CB500 with good results in both cases. They were sourced from DS.
the-chauffeur:
Cool.
Never really understood why the aftermarket air screws for the 72/77's are quite so far away from the originals when the rest of the bits seem to be so close.
About the only thing on the air screws that they get right is the thread/pitch. Unfortunately, that's about enough to convince the naive (me) that they must be better than the originals because . . . newer(?!). Nope.
Comparing them will show the profile is totally wrong, and more often than not there's no recess/not a deep enough recess for the tiny o-ring to be fitted - either that or the recess is the wrong size/shape/location. Makes reassembly almost impossible and if you do somehow manage to get them to fit, you're chasing air leaks
Oggie400F:
The Keyster kits for the CB72 don't seem to be available on the DS sight although I have not called them to check.
The ones I have found are through the bay of fleas (Julies saying) from Germany.
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