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| Mechanics Corner Looking for answers to mechanical questions? Just can't get it to run right? Got a tip for increasing HP? This is your forum! |
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06-06-2009, 01:55 PM
| #1 (permalink) |
| Newbie Join Date: Jun 2009
Posts: 3
|  Need a TECH nerd or expierienced mechanic, PLEASE!!!
I have a 96 cbr900rr with a fuel delivery problem. I get a dribble of gas into the float bowls. Not enough to reach the cylinders, but enough to drain from the bowls. Not a chance on turning over thou. If I remove the fuel pump cut-off relay, and run a jumper wire, everything works. That tells me that I have 1 of 2 problems. 1. The relay is bad. 2. The relay is getting a false signal to cut off. Either way, the best thing to do is replace the 80$ relay, and hope it solves the problem. However this is just my stunt bike. Its not even registered for road use. So here is my idea, pick it apart, or agree with the theory. I need some other opinions to make sure that my idea is a good one. Instead of replacing the relay and hoping that solves the problem, how about do away with relay all together. Either gravity feed the carbs, hook the fuel pump to a toggle, or (my favorite) install a vacuum fuel pump and run it off the vacuum for the carb sync of #2carb. I am aware of these problems with the 3 choices. GRAVITY FEED will work flawlessly as long as tank is always above carbs. Not so good when 80% of the bikes life is on the back wheel. TOGGLE SWITCH/JUMPER WIRE would ensure fuel pump operation, but most likely will over pump, and force the float needles open, inevitably flooding the bike. Last option is the vacuum idea. I can't think of any potential issue as long as I get a vacuum pump with the same output pressure as the stock fuel pump. That's why I am here. Does anyone know from experience any reason the last idea won't work? Advice? Ideas? Problems? Solutions? What do u techs think? |
