Just was wondering if that will make the bike sputter in low to mid range 1/8 to 1/2 throttle and at cruising speed also can i just turn the gasket over and reuse it i also cleaned the carb and rejetted the bike good spark
The rejeting of the bike is most likly the cause of the sputtering. Maybe the size of the jet doesnt suit the altitude check to see that the jet is not too big.
SOURCE: i have a honda CB400 super four and have been having a slight pro
Your carb may be adjusted a little lean. Try adjusting the needle, keeping track of the changes you make, and blipping the throttle full to check the result.
SOURCE: my gs500f is back firing through the CARB. the
Lean mixtures burn very slowly, at times slowly enough to continue
burning through the power and exhaust stroke, causing a backfire when
the intake valve opens, and that flame gets a shot at the new mixture
charge.
In normal operation, as the engine slows, the fuel delivery from the
main circuit falls off, and the idle circuit is supposed to take over.
If the idle circuit flows insufficiently, that becomes a transition to
fuel starvation.
You can try pointing an unlit propane torch into the inlet air, and see
if you can get closer to an idle while supplying a supplementary fuel
source. You will need to do this in a way that gets propane to both carburetor inlets, maybe rigging a Y with vacuum hoses and
electrical tape...
This started with work on
the carburetors, so the fuel system would be the most suspect. That,
and the fact that it will run at higher RPM would seem to rule out fuel
delivery.
I was looking around at photos while developing this answer (needed to know whether this was a twin or a 4-cylinder), and one resource said the idle speed should be 1,200. I don't know if that's right, but maybe 1,000 RPM is too slow for this motor to keep it together. (I do doubt that, though.)
When I wrote that last sentence, I started to second guess myself,
thinking "What if the fuel shutoff(s) is/are vacuum operated, and as the
bike approaches idle there is insufficient vacuum to hold it/them
open?" But the I rejected that, because there is even less vacuum at
cranking speeds, yet the bike starts.
SOURCE: my 98 suzuki vz800 marauder sputters at low speeds
Could be a combo of all. Replace your spark plugs sync carbs, and run it to see how it responds before you mess with the mixtures. Also check for any vacuum leaks. Hope this helps.
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can this cometic gasket upside down cause the sputtering
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