Air/Gas blowing from carb, help?

[96GSXX]

I am having a problem that has me completely stumped. The one I'm having trouble with is my 96 SPX 717!*

The timing of the rotary valve is right, the brass gear isn't stripped, but I'm still having air/starter fluid/gas spray back out of the carbs. Could low compression in the cylinders cause it to blow back out? Any help would be great!!*

Thanks

 

[LouDoo]

What is the compression? Sounds to me that the timing is off, or bad rotary valve.

Lou

 

[96GSXX]

The timing is where it should be according to the manual. How do you know if the actual valve is bad?

 

[Dr Honda]

If there is physical damage to the valve, is the only way it can go bad. Normally, the case clearance becomes high... but you wouldn't get a lot of blow back.

To me... it sounds like you have it timed wrong.

 

[96GSXX]

There's a little nick on one of the flat edges...but I wouldn't of thought that little thing could do so much?