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Lost it's vacuum you say? The rubber pipe providing vacuum to the fuel tap is routed in a very tight path under the tank and backbone frame. If the line is pinched or bent too sharply this will cause it to not get vacuum to the tap. The routing is critical.

In your other post you said "petrol tap pours petrol out when it should be sealing" is this when all the fuel and vacuum lines are connected or are you talking about when the tank is removed? Because if it's pouring fuel out with all the hoses removed then you might have the tap set to the prime position instead of run, just a thought.

My D12's fuel tap was leaking too. I tried replacing the gaskets (all four of them) but it still leaked so I ended up replacing the whole assembly.
Hasn't leaked since.

dc
 

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Discussion Starter · #3 ·
Hi

petrol pours out of the tap when the tank was being removed, i've ordered a seal kit which is a 1/3 of the price of a new tap, i hope that cures it, but the low rev misfire???, i'll have to wait a few more days to find out !!!
 

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116 Posts
Discussion Starter · #4 ·
Hi
fitted seal kit to petrol tap and made sure there were no pipes from it "pinched" or kinked to the carbs, and all seems fine, the plugs look like they are running slightly rich ( better than weak !!!), the weather is to cold for a proper hot crawl through town traffic, but i'm hopeful of a cure to the misfire
 
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