750 sport fuel system

discussion about the 750 Sport and '89/'90 900SS, which share many mechanicals with the Paso series
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jimg1au
Posts: 26
Joined: Wed Jan 31, 2018 7:25 am
model: 750 Sport
year: 1988
Location: Australia

750 sport fuel system

Post by jimg1au »

Hi
I have a new needle and seat to put in my Webber carby and I have found that there was no jet in the return system what dose this do without it in I will have to buy one and put it in120 delorto
Thanks
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Mc tool
paso grand pooh-bah
Posts: 1794
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: 750 sport fuel system

Post by Mc tool »

The missing jet provides a bit of resistance to the returning fuel so most of the fuel goes to the carb . Mine doesn't have one ,I just made the return line a bit longer to provide resistance. If you do away with the return line you would need a fuel pressure reg as the standard pump will blow straight thru the float valve, so if the reason your replacing it is because it's leaking .....might pay to make sure your return line set up is working properly
I wish I was young again............Id be heaps smarter than last time
jimg1au
Posts: 26
Joined: Wed Jan 31, 2018 7:25 am
model: 750 Sport
year: 1988
Location: Australia

Re: 750 sport fuel system

Post by jimg1au »

I am changing the needle and seat as the bike runs rich and also when coming to a stop after riding it just stalls
my spark plugs are always black with soot it takes off fine and pulls through all the gears just want to stop the richness
I don't ride it fast and the motor is perfect condition only done 8500 klms from new
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