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"KRS/GT" Technical Q&A K1200RS/GT Technical Questions/Answers

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  #1  
Old 06-01-2012, 03:38 PM
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Help Quick

I got in Wednesday from a 600 mile jaunt. Had about 3/4 tank of gas left. Rode my Sportster Thursday. I started my KRS this morning and gas shot out from several places inside the plastic. Time for some maintance so took off plastic, and switched on key, nothing. Cranked and idled, nothing. Revved up motor and nothing. I have chrome steel QDs and they were locked and dry. I can't even find a gassy spot. Only oily residue on top of block under injectors. I told ya'll Wednesday that the gas leaked over the overflow after gassing up to max fill, but, it may have been some other booger. Anyone else have this happen? My 1st. I even tried idleing and moving known gas hoses. ????
I'm thru and waiting for the bike to finish drying before putting plastic back on. I'd like to correct before melting my RS. Thanks Dickey
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  #2  
Old 06-01-2012, 04:06 PM
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Re: Help Quick

3/4 full....just enough to be under the fuel gauge flange? Mine was leaking had to replace that gasket.
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Old 06-01-2012, 04:17 PM
voxmagna voxmagna is offline
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Re: Help Quick

NEVER heard of that one! First and with the motor running, I would flex and bend every gas hose both sides of the quick disconnects right up to and including the fuel rail and back.

It sounds like gas was coming out under pressure and that is where I would look first, because those hoses can get quite a bend on them. You would not spot a fracture through the rubber by eye, but you would get gas out at 50 psi. Depending how the hose sat, a small tear or weak spot could get sealed up again. slacken off hose clips and pull them back so you can see if the hose is damaged underneath at that point. I hope you are using the Oetiker or proper fuel line clips.

Another clue to some kind of hose leak is the fuel pressure should stay in the hoses for tens of minutes after key off. I am sure mine keeps its pressure for at least half an hour. If you leave the bike for a while, separate a QD and poke the non-return valve over a bucket, you should still have gas in the line under pressure.

Pbegin suggests the fuel sender flang, I can't see fuel shooting out of there unless it was a hot day and the tank was under some pressure (?) - are the tank vents clear? Try topping up the tank level above the sender gasket.
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Old 06-01-2012, 04:58 PM
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Re: Help Quick

Also check the return that runs across the engine. Look for perished rubber.

Flashlight and masses of patience required......(Borescope if you have one. Some other bum's got mine.)
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Old 06-01-2012, 05:01 PM
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Re: Help Quick

The 1st overflow was on 5/30/12, and i wrote on the post about putting holes in filler neck to get an extra .2 gals. Any time the key is on,I should have 50 lbs, right. Enough to show the leak. I even checked to make sure the gas cap was locked in place. Keep thinking, I am!
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Old 06-01-2012, 05:35 PM
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Re: Help Quick ~~Solved and fixed

I found it and temperory fixed it. The Hi pressure hose going to fuel log had a tiny cut just outside the hose clamp (the good ones). It appears when I removed the hose about 20K ago to install a throttle cable I pushed on the hose with a small screw driver (the same one I used today) and must have slipped and jabbed the hose. I guess the hot weather finally got it. I went back out to work some more and noticed an old gas stain, after I cleaned the motor good. Politics say follow the money! Mechanics say, follow the drips and stains. It stopped under the clamp and I found the very tiny slit! Too late to order today, so I trimed 1/2'' off the hose and re installed.
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