[Bad Ass Honda 250r]

hhhmm, not sure that explain the theory or reasoning ..
does it start good now ? ..1st kick or ? ...how many ?

ever ned to change main afterwrds or foul any plugs ?
use the choke to start ?

so your machine(s) NEVER rev up as the bowl looses gas ?
still not convinced that fixes any real problem that may have or not have been ...convince me
just asking questions cause I want to understand more on your point / suggestion etc

nope my quad Never does this. Not everythings needs an explanation. and one thing. the only way a carb can suck air from the bowl, is if it sucks it from the over flow tubes, try putting on one of those carb line filters and that might keep it from sucking air in the over flow tube.

 

[2R's]

:huh: ...ok^
well I guess I'll leave my machines as is ...they all run great B)
& needs no additional tuning just for draining the carb bowl at end of day

 

[thedeatons]

Yah, see your point..... I honestly never touch the petcock unless they are going to be stored, for quite a while.

 

[2R's]

Yah, see your point.....

Glad to hear it ..others can do as they please
til someone can reteach me carbs or at least explain
something logical about a reason for thinking they know better than me
I will continue to go with what I know is best !

 

[thedeatons]

Well, that is an interesting point, I mean the only place the bowl gets air is from the vents, or through the needle to jet needle seal..... So if the pilot is no longer submerged in gas, it is pulling air from somewhere... Not sure that warrants a pilot adjustment though, since it will always pull air from somewhere, as I just mentioned....

 

[Bad Ass Honda 250r]

:huh: ...ok^
well I guess I'll leave my machines as is ...they all run great B)
& needs no additional tuning just for draining the carb bowl at end of day

i didnt ask anyone to do any more tuning. just thought i would let the thread starter know how i fixed this problem.

 

[mj4trax]

I don't typically bother with any of this stuff. . . . on any of my machines. .. and I've never had to ungunk a jet. Sometimes I run my quads until they die before I jet so I don't have to spill so much fuel on the ground (when it's in my lawn or garage).

I don't drain the carb bowls on my lawnmowers, motorcycles or weed eater. .. and I've never had a problem.

With the quads, I run high quality octane boosters that have fuel stabilizers in them (ie Klotz / Maxima) and in everything else, I add Sta-Bil near the end of the season and forget about it.

Now that I said something, I'm going to have massive problems with all of my engines this spring though ;-)



As far as the one person claiming that their quad doesn't run lean and rev up a bit right before it dies. .. I'm wondering if a big enough pilot jet will suck so much air through it once the fuel level is below it that the quad simply dies instead of leaning out with the tiny amount of fuel that sucks through the main circuit. My quads have always rev'd up a bit when they run low on fuel.

 

[C-Leigh Racing]

Only way, a 250R engine wont run lean & rev some once the fuel level is below or past the bottom end of the pilot jet, is if it somehow has been extended deeper down into the carb bowl or either the slide has been adjusted so it will close completely & have no idle at all.

If the silde has even the slitest crack, at the bottom of the venturi, that engine will suck air through that crack & run untill theres no more fuel being drawn in to supply it to run.

All my riders, be they on a 250R or a Yamaha blaster, their engines dont idle, at all & each have to learn how to ride the bike like that. When they chop the throttle, the slide closes.
Neil

 

[2R's]

^^^^^^ thats right Neil !