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Installing a fuel pump.

Old 08-11-2010, 04:29 PM
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Installing a fuel pump.

I've read this thread already.

So my next questions would be:
what is a bypass type fuel pump
and how do I calculate the psi output?

I did a quick check of the pumps available on the japanese auctions and none mentioned anything about psi outputs.

If anyone is asking why, it's because I'm want to place the tank under the seat GP style.
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Old 08-11-2010, 04:47 PM
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Well... If they don't tell you the output in PSI what do they measure it in? conversion shouldn't be to hard...

The key is that the pump is designed for carburators, not FI... If it doesn't say, odds are it's for FI since carbs and pumps aren't that common, and even less so today...
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Old 08-11-2010, 06:09 PM
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After you have installed the fuel pump insert the fuel line in your girlfriend's ***. Ride like hell for a few minutes and then offer her a cigarette. It's called gravity-feed.
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Old 08-11-2010, 06:33 PM
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usually fuel pumps used for carburated motors are rated in volume (cc's) per min. FI motors will use fuel pressure rated in psi in referrence to MAP (Manifold Absolute Pressure ie negative vacumme) Honda FI fuel pumps usually run 32 to 50 psi above MAP and is variable based upon load, a Honda FI fuel pump without regulation (fuel pump regulator) will usually run at 50psi max output.
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Old 08-11-2010, 06:49 PM
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It sounds like a very ambitious project. Maybe a fuel pump from another carburetted Honda might do the job? The NT650, which may have been known as a Bros in Japan, had an external fuel pump. Some carburetted Gold Wings had a fuel pump in the fuel tank. I don't know if either pump would be adequate for a VTR1000F. Roger at Revolution Racing may know.
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Old 08-11-2010, 07:41 PM
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Old 09-02-2010, 02:52 PM
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Interesting post, can be use this?
http://www.holley.com/12-801-1.asp
It has a externally accessible pressure relief valve.
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Old 09-02-2010, 06:03 PM
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I don't know how well it could work, but the VTX1300 is carb'd and has a fuel pump (at least the '03's did).
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Old 09-02-2010, 06:47 PM
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Why ?
One more component to fail.
More weight.
More drain on the electrical system.
No gain in power.

FWIW, the CB1 came with a fuel pump, so did the CBR600F3. I've combined the two but got rid of the pump and it runs fine.
Once ,more, why ?
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Old 12-12-2011, 04:19 AM
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Not sure why but my Firestorm got one.
Recently found out it is not original part of the bike.

But there must be a good side of that to have a fuel pump, if you look closer at Moriwaki VTR you can see it has one(just behind the rear shock resevior).




I got a friend that got some skills in tuning bikes and he explained that a fuel pump will keep the fuel level in the carb more stedy at high speeds.
The gravity method my not be enough for the tirsty VTR engine to fill the carbs.
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Old 12-12-2011, 09:54 AM
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Under hard track riding on a bike that's tuned for maximum performance and nothing else... Then, yes you can starve the engine without a fuel pump on a gravity feed system... But for normal riding it's likely to happen... So why add complexity?
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