Topic: Bypassing Side-Effects?

[wanackg]

First off, the bike is a 1981 cb650c with cv carbs.
 
Now, the vacuum petcock is leaking fuel from the vacuum line that goes to the airbox. I plan on just bypassing it and running the line directly into the carbs. But my dad seems to think the auto petcock also regulates how much fuel gets thru to the carbs.

So are there any negative side-effects of bypassing the vacuum petcock? 

[TwoTired]

The vacuum operated fuel valve only opens where there is vacuum.  The "regulation" capability is largely fully On or fully Off by design.  It's to keep the carbs from overfilling and diluting the crankcase oil.

If it is leaking, the diaphragm is bad and needs replacement.

Or, were you planing on supplying fuel to all the carbs with the leak source from the diaphragm?

Perhaps your reserve setting bypasses the vacuum control.  You could operate from that, but when you're out of gas, that's it, you're walking!  And, if you forget to turn off the valve and the carbs overflow, then you have oil supply gas dilution.  So, you'd better check the oil level and quality before each start up.

Are you really too cheap to fix it properly?   Or, is this an apocalypse bike?

Cheers,

[wanackg]

it isnt worth replacing for what i paid for the bike in the first place. Plus ive looked before and theyre rather hard to find.
Ive heard of people bypassing it before. Before 81 though hondas didnt have auto petocks anyways.
I plan on just turning the petcock on the tank when im done (which i already do anyway)

[TwoTired]

it isnt worth replacing for what i paid for the bike in the first place.

I understand.  The bike can/will never be worth more than what you paid for it, right?
It's your call, of course.
But, if you don't love the bike, who will?

[wanackg]

But, if you don't love the bike, who will?

Well if it werent for school and gas prices i could afford to love it much more! 

[heffay]

don't ride it for a month, fix the needed items with that gas money savings, ride a proper bike next month.