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primary drive train rattle - CB750F2

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blackeagles:
reading on this site and elsewhere i know that the annoying rattle these bikes have tend to be associated with the carbs being out of sync. and the primary drive chain thrashing about at tickover.

i had this with the cb400f2 i have but most of the (worst of the) rattle has gone after i crudely synced them using a cheap set of gauges from ebay (but they are not very accurate and i suspect th carbs are not spot on or even that near if i am truthful !!).

having set the 750 up - tappets, ignition etc i am still having trouble getting it right and the rattle tis more than i can put up with. the main problem is that the engine 'hunts' so its prob. a mixture of sync and pilot (which is out 2 turns)

anyway, does anyone know of a mechanic or someone who specialises in the older bikes (plenty in my area who do the new stuff) in the n/w kent and se london areas- i'm in orpington so the nearer the better.

thanks
 

K2-K6:
I've no experience of mechanics local to you able to work on your bike,  not so much help there  :D

But from a start point you need 1 3/4 turns out for low speed mixture screws (they're opposite on F2 carbs to earlier K type) with 2 turns being too rich.  Suspect you'll end up between one and a half to one and three quarters ultimately, that's if all standard setup.

I don't mind looking at it with you if you can't find anyone commercially that is knowledgeable with it. By all means PM me if you're stuck.

Bryanj:
I would say bring it to gloucester but it has those god awfull PD carbs on it so i dont want to know, seriously i would happily put my vac gauges on it but i will not do anything else to the carbs

the-chauffeur:
Have a word with 21st Moto in Swanley.  Won’t necessarily be cheap but they’ve got some good people there.

Rob the boss has a collection for of older Honda’s including a K0 750 and last I heard a K0 Goldwing.  Dave in sales has been around them for years.  And if you stick your head in, you might even get to talk to Keith from the workshop.  He’s done a bunch of my ‘70s stuff and given the choice, he’s the one I’d want working on anything like this.

blackeagles:
ok, thanks all.

k2-k6.  i did start at 1 3/4 out as per your suggestion in an earlier post but i was under the impression that with these carbs you then went in or out until you had the fastest tickover (rather like most carbs) then went back weaker by maybe a 1/8 turn.  doing this i get about 2 turns out! so maybe since its 'hunting' a bit i need to go back in another 1/8 turn and reset the tickover - i have to say i have tried this and to my befuddled mind the engine seemed to run rough rather than 'hunting' but that may just be me (since my hearing is not what it was)!!!! .

i will give it one more go so may be in touch (this is really driving me mad)!!

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