Really strange problem

[Guest]

This problem is related to my 1981 GSX750E.

When riding normally with my feet on the foot-pegs the bike stalls sometimes around 3000-4000 rpm. Especially if I have given it full throttle seconds before.

Now, here is the strange problem (or solution). If it starts to stall, I just move my feet to the passenger foot-pegs and there is NO PROBLEMS!!

I rode 118 miles yesterday with my feet on the passenger peg and not one single problem except when having to use the front foot-pegs.

I cant find any solution to why this is happening.

[tatu]

Is it possible you are putting pressure on the fuel tank with your knees and pinching a pipe?

[tom203]

Will it do this silly thing if just one foot stays on front peg? Are you shifting your weight and putting different stress on right hand switch- i.e. ,bad kill switch wiring ?

[phrode]

All is good as long as I dont have my legs close to the engine/carbs and maybe shift my weight a bit further back. When I move my feet it takes only a second and the bike is running fine.

I have checked hoses, and intakes. Cant find any problems there.

[Steve]

Do you have theh stock airbox or pods?

.

[phrode]

Stock airbok, new air filter and new boots (New Airbox Air Intake Boots 80-83 GS750 GS1000 GS1100 OEM)

[GS/GR PAUL]

Has this model a side stand cut out switch?

[phrode]

Not to my knowledge.. But it is not an electrical problem. Feels more like an air/fuel problem. Kinda like there is some sort of false air getting in or being blocked.

[Larry D]

The air intake snorkel is behind the side cover....correct ?

Perhaps the positioning of your leg is causing some type of air vortex, limiting the airflow to the snorkel ?????

Weird........

[phrode]

That was my first thought, but since I need to move both legs back I think, that eliminates that.

What about some vortex/pressure around the intake boots? I got some strange feeling they are not the exact fit, leaking and air get pushed in???

[pdqford]

How about the vent tubes that run up along side of the seat? Are they in their stock location?

[phrode]

I dont think so. I have not paid any attention to them.. is there any special way to put them?

[phrode]

The vent-tubes were on the outside aiming forward, I placed them inside and under the airbox. That did the trick. I rode 100km today, and not one single problem :-)

Thanks for the tip pdqford. That really did it :-))))