[Crazy1ear]

Hi all,

Hoping someone can help me. I have an 02 Kat 750 that now has 7,000 kms. I admit I drive it a little hard, although not anywhere near its limits.

Anyway, recently I've found I have to turn the fuel knob to Prime to get it to start. Also, I've smelled rubber burning upon start up... like immediately after starting, before anything really gets a chance to heat up (except maybe the headers, and perhaps it's just a piece of rubber hose or something touching the exhaust... I'll have to check closer on that).

Anyway, anyone else have this problem?

 

[pitbull76]

Does it run on any of the other petcock settings?

My guess is that the vacuum hose to the petcock is damaged or defective. Both On and Res require engine vacuum before they will let the gas out. Prime does not.

 

[Crazy1ear]

Yeah, it runs fine on "ON" or reserve after I get it started and it warms up. It will even restart after a short shut off. But it seems if I leave it a couple of days or more without starting, then I have to turn it to prime again.

But I'll check the hose. It's likely the increased vacuum pressure when it's running may be enough to draw the fuel through after start up.