Thanks TC, now I just have to get that special tool to get my carb tops
off.(and an air comp)I also looked at the tips page and this post would
be something to add !!
TC wrote:
>
> M,
> I guess if you could get a good seal you could use a bicycle pump but
> I usually use a rubber tipped blow gun on a regular air compressor,
> (100+ lbs). If I do it from the top I use a tube extension tip on the
> blow gun and get a fair seal against the pilot air jet, (the big jet
> at the top of the carb).
>
> Since you are spitting right at "off idle", (throttle plates starting
> to pass the three bypass holes), they are probably the ones that are
> plugged so I would try to put "air compressor" class air at the pilot
> mixture screw hole, (with the screws removed of course), since this
> would have the greatest opportunity to clear the bypass holes .. of
> course either place .. or at the PAJ2 even behind the slide rubber
> will likely do the job if you get enough air pressure.
>
> The passageways are very small so it isn't like you are going to
> launch a carb float or anything ........ but you will squirt so fuel
> out of the passageways .. so cover the carb tops with a rag if you
> have them open when doing this.
>
> The three bypass holes are directly above a closed throttle plate ...
> with the plate closed .. you get pilot mixture out of the pilot
> mixture screw hole only ... as the throttle plates start to open ...
> the bypass holes are exposed one at a time, (they end up underneath
> the throttle plate because it is opening). As the throttle plate
> passes each one it allows the uncovered bypass hole to contribute to
> the pilot mixture being ingested by the engine ... once you have
> uncovered all three then the carb runs off of all four holes .....
> This is the only way pilot mixture gets into the engine ... once you
> get this far .. there is already enough air flow to start pulling
> mixture out of the needle jet .. it will sneak/spray out around the
> slide needle even though the slides may still be closed ... so then
> you run OK ... Obviously .. if any of these little .08 bypass holes
> are plugged you will be popping back in the carbs and general bad lean
> behavior, (at least until you get past them and start stealing main
> mixture from the needle jet .. which is simply the tube that the
> needle slides in and out of).
>
> I apologize for turning this simple question into another novel but
> some people don't know about these little holes what happens when the
> little suckers get plugged up.
> campbell
>
> ----- Original Message -----
> From: "M.Sigworth" <[EMAIL PROTECTED]>
> To: "V-MAX TECH LIST" <[EMAIL PROTECTED]>
> Sent: Sunday, June 04, 2000 8:16 PM
> Subject: Pressure
>
> > How much air pressure is optimal for blowing
> > out the pilot mixture circuits? I do alot of low
> > speed cruisng (military residental area)
> > around 2000 to 2300 rpm and the bike spits
> > and or sputters.Idle is smooth and above those
> > rpm's it's strong.
>
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