Bob -
Ok, here goes:
1) Does not close even when linkage is disconnected
2) only closes if some pressure is put on the shaft
This to me tells me your throttle plates are not correctly centered on the
throttle shaft, and thus is interfering with the free movement of the
throttle shaft itself.
You have to take the carbs off then make sure the throttle plates are nice
and flush with the throttle body before tightening the screws down. You
have to back off the idle speed screw and loosen the plates, then adjust
until it's nice and flush. Once centered, hold the carb up to the light to
make sure you have no gaps around the throttle plate to the throttle body.
It's actually a quick fix, but you have to take the carbs off and re -
balance afterwards.
Best Regards,
Alan
On Mon, Nov 1, 2010 at 5:31 AM, Bob Spidell <bspidell@comcast.net> wrote:
> Listers,
>
> Our BN2 runs well, but we have a small problem with the carbs. We can't
> get the throttles to close to the stops consistently; i.e. when we let off
> the accelerator pedal the throttles don't (usually) come all the way back to
> idle position. They usually stop about 100 RPM higher than they are
> adjusted to run at idle. If I press down on the shaft levers they move
> slightly and run at the desired idle speed.
>
> We went through the carbs, cleaned them well and installed new jets,
> needles, gaskets, etc. The shafts turn freely, and there's nothing in the
> throttle bores getting in the way. We've tried 'torquing' the coaxial
> springs to get more tension, and there's no difference with the linkage
> attached or not--something is preventing the throttle plates from closing to
> the desired stop point.
>
> Any suggestions?
>
> TIA,
> Bob
>
> --
> *******************************************************************
> Bob Spidell San Jose, CA bspidell@comcast.net
>
> *******************************************************************
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