New petcock but no vacuum flow. help!

[Guest]

I got one of those new petcocks from Z-1 for my 79' gs750. I installed it and also installed a Briggs and Stratton fuel filter, one of those small little red ones. Added about three inches of extra fuel line to accommodate the filter and because the hose fittings on this new petcock are pointing in the opposite direction as my old one.

Now my bike will only run on prime. It's getting no vacuum fuel. What could cause this issue?

[c3powil]

Opps! I think I fixed it. The line that draws the vacuum was routed with too tight of a bend, but after un-kinking it, the bike seems to run well.

[growler]

Nice catch.

[tkent02]

Not sure about the red B&S filter, it may not flow enough fuel for an engine of this size.
Did you test it for fuel flow?
Be alert for the engine going lean at sustained wide open throttle.