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Old 04-21-2012, 01:51 PM   #31
Gasit
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What i was told is the fuel pump works on pressure to the carby's it has to maintain a constant volume as well as a certain amount of fuel pressure that keeps the fuel flowing as the carby's need it to operate as they are designed to when you crack the throttle open and that little fuel pump works bloody hard it has to pump the fuel vertical and if you replace it at least you know its not the fuel pump
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Old 04-22-2012, 03:29 AM   #32
BLUE(UK)
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Further problems on rebuild......

http://advrider.com/forums/showthread.php?t=783978

WIll post up when I finally get it done!!
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Old 04-30-2012, 03:39 PM   #33
rubRsidedown OP
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Well I repaired the fuel pump and it still has the same issue.
MUST be carbs.

Diging into those next.

Do the tanks have to be removed, I would imagine so, to free things up....
Yeah, THAT was a STUPID question.
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Old 04-30-2012, 03:54 PM   #34
Sumi
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Quote:
Originally Posted by rubRsidedown View Post
Well I repaired the fuel pump and it still has the same issue.
MUST be carbs.

Diging into those next.

Do the tanks have to be removed, I would imagine so, to free things up....
Yeah, THAT was a STUPID question.
That's the easiest part of the fun that's avaiting you:)
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Old 04-30-2012, 04:02 PM   #35
rubRsidedown OP
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Originally Posted by Sumi View Post
That's the easiest part of the fun that's avaiting you:)

I can only imagine.
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Old 05-01-2012, 12:25 AM   #36
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That's the easiest part of the fun that's avaiting you:)
Maybe you should look on it as a positive upgrade and re-jet while your there. H2w (Ken) on this forum has the jets you need for your altitude (http://www.advmachines.com/product_p/jp1002a.htm). Might be worth thinkin about and ordering before you pull those suckers (sorry about the pun).
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Old 05-04-2012, 09:29 PM   #37
Bgunn
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any closure yet?
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Old 05-05-2012, 03:41 AM   #38
rubRsidedown OP
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any closure yet?

No nothing yet, to be honest I haven't had the time to do much of anything to it.
Just got back from vacation last weekend and came down with the flu. Didn't feel much like freezing outside twisting wrenches while waiting to hit the toilet for the hundreth time.

I HOPE to do something with it this weekend or forst part of next week.
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Old 05-05-2012, 07:00 AM   #39
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Quote:
Originally Posted by rubRsidedown View Post
Well I repaired the fuel pump and it still has the same issue.
MUST be carbs.

Diging into those next.

Do the tanks have to be removed, I would imagine so, to free things up....
Yeah, THAT was a STUPID question.
Yes Sir...it IS the carbs...Get a service manual before you start on them..
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Old 05-05-2012, 04:52 PM   #40
rubRsidedown OP
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Yes Sir...it IS the carbs...Get a service manual before you start on them..
I have one, thanks.
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Old 05-09-2012, 06:15 PM   #41
rubRsidedown OP
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What position SHOULD the jet needle clip be in for an elevation of 0-3000ft?

Service manual says 2nd position from the top.
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Old 05-10-2012, 01:00 AM   #42
Dale950
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Another thing to check - water in the tank , happened to me when the drain hole's blocked under the fuel cap .
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Old 05-10-2012, 01:04 AM   #43
Sumi
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Quote:
Originally Posted by rubRsidedown View Post
What position SHOULD the jet needle clip be in for an elevation of 0-3000ft?

Service manual says 2nd position from the top.
That is correct. You can also try 3rd from the top (middle), but I can't feel a big difference..
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Old 05-10-2012, 07:01 AM   #44
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Originally Posted by ElChico View Post
My 950 is at 72,000 miles and I hardly know where the fule pump is... never touched it. It seems to me that there's a paranoia amongst some people.
In terms of the fault here - mine was missing at @ 2000 rpm steady - it was the rear carb - needed the jubillee clip tightening up a bit and a re-balance of the carbs.
The fault described though sounds like carb icing perhaps, I have had that quite often in the UK - and not always when it's very cold. If the engine goes onto one pot then dies out, and after 10 - 15 mins is OK again it's carb icing. In chilly/damp air I have found that you have to warm the engine up longer to get it hotter and to avoid a long spell of fast speeds and then very steady - 30 mph - you have to keep it varied.
You can buy anti-icing additives but they are expensive... modern fuels are part of the problem, they're shit!


Hope this helps
Ta
Col
Well, I'm not paranoid, I've gone through 2 pumps in 40,000 miles. But the OP problem sounds like a carb issue to me. When I had problems with the pump, it didn't stumble, it would just die.
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Old 05-11-2012, 06:42 AM   #45
ridewestKTM
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discussion

I have been discussing this with RSdown via PM. I worked on the pump putting in a kit and removing the points. The points were as bad as any Iive seen. With the kit the pump cycled great but flow/pressure seemed a little weak. The valving was good - didn't flow back or anything. That covers the two most common failure modes I have seen so I said it should be ok. I'm thinking now that the points may have gotten stuck and over heated the pump and either weakened the spring or reduced the coil's strength. I have suggesed some tests to eliminate the pump from the question such as pressurizing the tank or using gravity with a full tank.. - I think I'll just send him a working pump.
thoughts?
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