something simple?

[queenmonkey]

Hi guys i'd tucked my GS850 toward the back of the workshop until today but thought i'd fire it up. Some time ago i'd put a very early set of slide carbs on it - I've done nothing much with it since. Instead of putting the petrol tank on (which i'd just sealed and removed the tap from) i put a a small container with a pipe to the t juction between carbs 2 & 3. Bike started after some trying but it's clearly struggling on 3&4?

I was tempted to think it was a fuel thing and that a pipe needed connecting to feed 3&4 but by my reckoning there is normally only one pipe going from the petrol tank to between 2&3 (see t junction above) and that should feed all four carbs? Am i missing something simple here (there seems other pipe junctions on the carbs) or might my problem lie with an electrical fault?

[Agemax]

yep, you need to block off the vacuum pipe on the carbs that normally runs to the pet cock.

[queenmonkey]

yep, you need to block off the vacuum pipe on the carbs that normally runs to the pet cock.

Agemax, your a star - was hoping it was simple (much like myself!)