Question about Honda VTX 1300 R Motorcycles
I have a 81 900 custom honda that had a vacuum valve that would not allow fuel to go to carburetors unless the vacuum of the engine was present. Since I did not want to have to turn over the motor for a long time to get gas to the carbs I found that locating the vent tube connected to the other side of the diaphram and blowing into it pushed the diaphragm open and allowed fuel to flow to carburetors. Maybe this will work for you too. Hope this helps.
Posted on Dec 31, 2013
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Posted on Jan 02, 2017
my 81 xj750 vacumm line attaches to a pip on the boot that attches it to the head. Have you investigated to diaphram in your fuel pet ****. I know mine had a small pin hole which made my idle weak at times. i even went as far as resynching the carbs and changing the plugs before i found it . just enough to bleed off vacuum . Hope that helps
Posted on Jun 10, 2009
The breather tube may warrant re-jetting but not re-syncing.
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Posted on Jun 11, 2009
Well there only one way the fuel can get into the crankcase and that's from the fuel tank. The petcock must be draining and the float needles are not stopping the fuel flow. Do you have a prime position on the petcock? If so do not run the bike in the position. Try topping the tank off with gas and letting it sit for a while and see is the gas has gone down and then check the crankcase and see if there's fuel in it again. i still say its got to be your petcock.
Posted on Sep 29, 2009
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SOURCE: This is an Aprilia Mojito
Hi,,realy does sound like your fuel pump has had it,,did you have an inline filter,from the pump to the carb? anyway you could discard the pump and stick with good old gravity?
Posted on Mar 23, 2011
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