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Old 01-31-2013, 07:49 PM   #1
SE Steve OP
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Raid design vacuum fuel pump

So I finally got around to installing vacuum pump kit from raid deigns and it's leaking from the gaskets. looks like they get taken apart and vacuum side turned 90%.


Anyone have any ideas on how to fix it.
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Old 01-31-2013, 09:15 PM   #2
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Call Raid Designs. They will make it good
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Old 02-01-2013, 05:08 AM   #3
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Raid Fuel pump on 990R

Is this a workable, reliable alternative to the OEM in the tank masterpiece? With this can we dump the in tank due filter headaches and go for external inline fuel filters?
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Old 02-01-2013, 07:12 AM   #4
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I think this only vvorks for the carbed bikes. To lovv pressure for the EFI.
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Old 02-01-2013, 01:17 PM   #5
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Carb'd bike pump only
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Old 02-02-2013, 09:46 AM   #6
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That fuel pump looks vary similar to my 640 LC4 pump, which is a low pressure vacuum pump to feed the carb.
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Old 02-08-2013, 10:34 PM   #7
SE Steve OP
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Wink

Emailed Raid they sent a gasket set for the pump. Installed it still leaking. I just want to go for a ride
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Old 02-09-2013, 08:12 AM   #8
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Quote:
Originally Posted by SE Steve View Post
Emailed Raid they sent a gasket set for the pump. Installed it still leaking. I just want to go for a ride
Be more specific where is it leaking from.
The gasket between the two plates.
From a bolt hole
Petcock etc.

Take a pic and point to where the leak is in the pic.

If between the plates take them off and check to see if they are warped, use a glass plate to check this.

The gasket should accommodate a small gap but too big and it could be a casting issue. Is the pump new or was it in use for a while before it leaked.

See....need more details than "It leaks"
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Old 02-09-2013, 12:15 PM   #9
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I consider this pump to be undersized for the application...



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Old 02-09-2013, 05:37 PM   #10
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I consider this pump to be undersized for the application...



.
Why do you say that ? Raid design says that this pump cures the flooding problem when in whoops and pumps enough for top speed.
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Old 02-09-2013, 05:58 PM   #11
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Its about the same physical size as the same type of pump on a large outboard motor... Seems ok for a dual carb bike.. Surge volume might be a issue...

I found on boats the rubber in these last 1 season.. Les if they are allowed to dry out...

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Old 02-10-2013, 02:45 AM   #12
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if my memory is good , it's the same pump than ;640RR, 690RR..................... , and the flow is 35 Litres/hour

for gasket set ????? :

http://www.mikuni.com/fs-distributors.html
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Old 02-10-2013, 10:27 PM   #13
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Quote:
Originally Posted by SE Steve View Post
Why do you say that ? Raid design says that this pump cures the flooding problem when in whoops and pumps enough for top speed.
Thought the woops issue was due to the CV carbs shutting down??? Not flooding???
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Old 02-13-2013, 03:39 AM   #14
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i've had the pump on my SER for a good 12 mths or more & has been faultless

as for the pump leak make sure your hose clamps are tight Especially the infeed to the carbs off the pump. my first fire up with the vac pump leaked there & i thought the clamp was tight enough so a little more & was good. there some pressure there.


gasket sets are cheap - i bought 3 sets when i got mine on ebay
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Old 02-13-2013, 04:55 AM   #15
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I believe this is similar 38liters/hourMikuni pump as I had in my SE. If the engine consumes less than 370 grams/kWh, which it should do on WOT, the pump Is big enough. Also my experience backs the theory. I used the bike also on racetrack with half a minute full throttle straight without any indications on going lean. I Agree there is not too much overflow, though I measured the pump flow to be approx 44L/h with crankcase vacuum. The pressure on the other hand was so high, that the engine Flooded on the motocross track, so I had to use a regulator.
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