Convert vacuum petcock to manual

 · Manual Petcock Conversion (non-vacuum) Jump to Latest Follow 1 - 20 of 32 Posts. 1; 2; Next. 1 of 2 Go to page. Go. Wrencher86 · Registered. Joined Oct 4, · 37 Posts. Discussion Starter · #1 · 9 mo ago. So, My EX is going to live primarily as a track bike. How to convert your petcocks from vacuum-operated to manual (with Off / Reserve / On functions. See below for Later Type Taps Conversion XSD and XSE models XSE vacuum-operated fuel taps. The vacuum-operated fuel tap (aka ‘petcocks’) on these bikes have two main failings.  · For the most part, the vacuum operated petcock on the VT FT Ascots works well usually doesn't cause any problems. There is the potential of the diaphragm forming a leak then not allowing enough fuel to flow to the carbs/engine, etc.

Manual Petcock Conversion. Installed prototype. Vacuum-operated petcocks are a handy thing to have on gravity-fed fuel systems; they automatically stop the flow of gas to the carb when the engine is turned off, saving you from a crankcase or floor full of gasoline should the float needle start to leak. Concours Manual Petcock Conversion Kit from Murph! Converts the vacuum operated petcock to a manual operation. The vacuum setup is prone to failures leading to a hydrolocked engine. The kit includes the following pieces:• 1-Large o-ring, seals petcock to bottom of fuel tank• 1-Medium sized. This mod makes the petcock fully manual, and you have to turn it off to cut off the fuel flow to the carb. Normally, the slight vacuum from the carb pulls on a diaphram in the petcock, and that allows fuel to pass through. With the conversion, the diaphram is removed and replaced with a simple gasket.

I need to rebuild my petcock since it is leaking fuel like a SOB and has contaminated my oil. While in there I was thinking hard about trying to convert this from a vacuum operated one to a manual. Did a search and found some posts about it but none really to my liking that fully explained what I was looking at. Converting vacuum petcock to manual. Jump to Latest Follow 1 - 3 of 3 Posts. chilimac · Registered. Joined · 1, Posts. Discussion Starter · #1. Hey all, need some help with a petcock on a c. I just did a conversion from to I'm going to change the petcock from vacuum to manual. I know I have to plug the vacuum line but what do I do with the fuel supply on the right side of the tank? On a manual petcock the fuel line runs from the bottom of the petcock to the carb.