> >>rebuilt HS6's. They're quite beautiful, clean, polished and they
> adjust to a beautiful, steady 900 rpm idle....
>
> >>Once prodded, however, they don't seem to want to return to idle.
Things learned over the weekend....
1. It's possible to tighten the carbs down too much! The throttle
shafts will start to bind....BE GENTLE. Don't leave them that way
they might permanently distort! My Norton (bike) manual warns of
this...
2. On HS6's check the fit of the various linkage levers on the
throttle shaft! One of the little levers has three
functions/arms...one has a hole for the return spring, one has an ear
to bear against the idle set screw, one has a screw to set the "fast
idle".... although the lever felt good and tight going on to the
shaft, once home, it could rock back and forth enough to make setting
the idle impossible! Staking the lever around the hole, then filing
it to fit the shaft seemed to work fine...don't know how permanent
this is...next time I'm gonna replace the levers....THIS WAS THE
PROBLEM!
3. Marvel Mystery Oil is a little too thin to use with well worn
carb damper rods on a TR4A. 10w30 worked great.... BTW the symptoms
were exactly as described by Mike Blonder ....a mid range BOG...
perhaps he needs to check the oil level in his carbs or switch to a
heavier grade.... on a stromberg I would imagine the diaphrams could
be trashed
...also the vac. advance can be checked by sucking on it. If it moves
and holds with out leaking, you're fine. Check the mechanical advance
visually, make sure it's all there and that the springs return the
rotor to the original position when twisted....put some oil or other
lube on it too....
... my guess is that it's the dashpots. Need more and or heavier
oil...
Thanks for all the suggestions gang! I really appreciate this list!
"Still ride in triumph over all mischance..." - Shakespeare
Chris Lillja
TR4A
Norton Commando
Spit MKIV
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