hey everyone first time using this ...so confusing...

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charles.and.karts

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hello everyone just made this in hoping to get some tips in building. im not just starting off in the go kart world ive been working on karts since i was 9 im now 18. i own 4 karts. birel ar4 with a 140cc lifan motor, and 3 others that i dont know the names of but i basically restored them from nothing and built them up. they all rum on honda motors. i also have a 75 cx 500 cafe bike that my teacher was nice enough to sell me that needs to be finished. which is another project that im working on. but i dont know how to use forums i want to ask a question about fuel pumps? help
 
anderkart

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Welcome to diy. You'd probably get more replies if you posted a new thread in the Engines and Clutches section, but you could ask your question here on this thread if you want. Are you having a problem with a pulse fuel pump working?
 
Doc Sprocket

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Welcome to the forum, Charles! Your location says, "gta". That probably stands for all kinds of locations around the globe. Around here, that would be "Greater Toronto Area". You?
 
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charles.and.karts

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i had a 110cc no name motor and i hooked the vacuum to the crank case breather but when i hooked it all up it wasnt pumping gas to the carb. its not the pump becuase i checked it and its a brand new mikuni pump, but i have heard that there not the most relible. i think the problem it that theres a small crack in the block?


yes im from the gta schomberg to be exact
 
anderkart

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Your getting a very weak pulse signal like that. Unless your carburetor or intake manifold already has a pulse-fitting, It would be best to drill/tap a hole and instal a 1/4" barbed fitting into your intake manifold.

You could buy a 1/4" barbed fitting like this at a hardware store:



And then instal it on your intake like this:

 
souperman000

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You could buy a 1/4" barbed fitting like this at a hardware store:
Click to expand...

I used something like this (from my neighbors irrigation business) to fix my dad's weedwacker. You just used JB Weld to keep it on place right? thats what I did.
 
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charles.and.karts

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ive installed pulse fittings on lots of honda motors but i usually have it on the valuve cover. and im just moving into shifters. is pulse fitting the intake maifold more accurate. what the gas spraying from the carb? wont that mess up my pump causing it to fail while running it?
 
anderkart

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You could do this with your 110cc no name engine, you just cant do a T-connection (or plug directly into) the breather hose like you tried. Your engine would still need a breather, and the pulse fitting would need to be located far enough away from the breather so It got a strong enough signal.

A pulse fitting in the intake will have a much stronger signal than from any crankcase or valve cover connection. The diaphragm in pulse pumps are fuel resistant and last a long time using an intake pulse signal.
 
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