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Push-Pull Throttle Cable

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mgy66:
Hello,

I have recently replaced the ignition breakpoint by an electronic ignition. The device is great and very simple to install and adjust.

I had issue with difficult start, specially in wet whether/morning. The idle is now much more stable.
Only drawback is that the idle is stuck at 2k even if the idle screw is completely down and not in contact with the carb lever (K1).

I have new throttle cables with a bit of slack as required from Haynes and return spring is strong. Carbs snap back if I let the throttle goes back free.

My question is really around this other return cable... I read the manual wrt 'adjusting link pin clearance' and suspect it may come from wrong set up. When I turn the throttle beyound the idle point, I have the required clearance(2-3mm with the excentric pin)  but noticed it does not affect the idle speed.

What the operation of throttle beyound idle point is supposed to do on the carbs? Could it be the root cause of a high idle rev?

Many thanks for your guidance...

neat street:
Hi, it could be that the carbs are not set up right (balancing) the four adjusters (one on each carb may need to be re-set) they open the throttles on each carb, but need to be balanced so all four let the right amount of fuel through. if these rae set too high, then you are getting too much fuel through, and the throttle stop will not work.
I hope this helps?
John

Bryanj:
Basically you may have the slides "hanging" on the adjusters so thatthey are still open a bit even with the tickover screw unadjusted all the way

mgy66:
Thanks, that must be something like that but I missed the point on how to adjust / push down the slides 'hanging'.

I have the lever holding the 4 throttle screw on to of the carbs (not a 4 cable system) and have set the rod tips flushed with the stop double flat bolt. In the manuel it actually say to keep 1.8mm between to face of the stopper bolt and the tip of the throttle screws. So I wod think my sliders are already deeper inside the carbs.

Also this is a 850 big bore version with standard jets #40 #105.

Any thoughts on how to reset / push further down the sliders?
Thanks

neat street:
hi, on top of each of the carbs you have a lock nut and an adjusting nut. if the slides are too high, you need to lower them by loosening the lock nuts and adjuster nuts (this is also what you would do to balance the carbs, but would need a balancing kit to get all four right). this will also affect the engine idle speed. if they are not balanced after you play with them the engine will run rough. I did read somewhere that if you put a 1/8 drill bit under the slides, the setting will be close to right, but will still need to be balanced to get the set-up perfect.
hope this helps?

John

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