klr650 fuel starvation and/or surging problems

[RM]

On Thu, 20 Jun 2002, s2mumford wrote:

>CA Stu A13 knees!"

In the interest of spreading knowledge of All Things KLR, and in the interest of maintaining solidarity with his KLR brethren, RM hereby decrees "closed lists, uh, suck... or something." RM

[Mark Wilson]

I agree, this list can handle any spammers that might wonder in here... The list should be open.. Nice tune Stu, now if I can just get it outta my head.... MotorMark

----- Original Message ----- From: "s2mumford" To: DSN_klr650@yahoogroups.com> Sent: Thursday, June 20, 2002 2:12 AM Subject: [DSN_klr650] Re: ATTN: LISTMASTER Please re-open the list to new members > --- In DSN_klr650@y..., "KDH" wrote: > > I thought the list was open. I mean I'm new here.......... > > KDH > > Hoorayyyyy!!! Welcome!! Now pay the initiation fee! > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > THIS LIST IS YOUR LIST > with apologies to by Woody Guthrie > > Chorus: > This list is your list, this list is my list > From the Brooklyn Bum to Mister_T > From Jim Sherlock, to the Professor > This list was made for you and me > > As I was riding a ribbon of highway > I saw above me an endless skyway > I saw below me a golden valley > This list was made for you and me > > Chorus > > I've rode and rambled and I've followed my headlight > To the sparkling sands of diamond deserts > And underneath me, my KLR was thumping > This list was made for you and me > > Chorus > > The sun comes shining as I was riding > The wheat fields waving and the dust clouds rising > The fog was lifting a voice come chanting > This list was made for you and me > > Chorus > > As I was postin' - I saw a sign there > And that sign said - no new members > But on the old list .... it didn't say nothin! > Now that list was made for you and me! > > Chorus > > In the squares of the city - In the shadow of the steeple > Near the DSN office - I see my people > And some are grumblin' and some are wonderin' > If this list's still made for you and me. > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > If I have to throw myself on the hand grenade of list closure to save > the quality of the great-world-famous-best-of-all-time-KLR list, so > be it!! > > CA Stu A13 your knees!" >

[Anthony Verno]

Open the list......yada yada yada.........

[Brent B]

I think the original statement was that the list would be closed until the problem was fixed or identified. In the meantime, I believe that the Moderator stated that if you emailed him with a name and address of an interested party he would take your referral. I vote to let him do his job. I am not much of a Monday morning quarterback or back seat drive, etc. I choose to believe he knows what he is doing, although I'd like the list open for all also. brent [Non-text portions of this message have been removed]

[klrz4ever]

Let's open 'er up and see what happens. I know two people that would like to join. Can't we all just handle our own spam if it becomes a problem? __Arden Kysely

[jwishart2001]

KLR650 Fuel Starvation/Surging Troubleshooting ============================================== This process may assist those who are having problems with intermittent fuel starvation or surging. This covers 49-state systems, not the CA system, although they may be similar. It is not intended to be all-inclusive, but it should cover the most likely candidates for problems. Suggestions &/or corrections for troubleshooting process improvement are welcome. DISCLAIMER: I went through this entire process and did not find anything concrete wrong. However, the problem has not happened again since I did this troubleshooting. I strongly suspect the carb vacuum line to the petcock or the fuel tank vent line may have been pinched, since I had just tipped the carb over to drill out the pilot mixture screw plug prior to this occurring. I also had the seat off. Symptoms: Running out of gas when you have gas in tank, but restarts OK after a while. Repeats after a few miles/minutes of higher speed running. Intermittent surging with engine under load. Intermittent fuel starvation. Fuel System Components (probable culprits): Carburetor Fuel Tank & Gas cap Petcock Fuel supply tube - petcock to carb Carb vacuum tube - carb venturi to petcock Fuel tank vent tube - rear of tank to air Carb vent tube - the clear one, carb to air Fuel filters - there are two within the gas tank on the main & reserve fuel feed lines. You may have also installed an aftermarket filter in the fuel supply tube. The following items should be checked, although not necesarily in the order listed. Fuel supply tube - Check for pinching, blockage, airlock, and leaks. Check for no uphill sections - may cause airlock. It needs to all flow downhill. If you install a clear plastic fuel line, it is easy to see if fuel is flowing. I used 1/4" ID vinyl tubing I got at the hardware store. Make sure it's gasoline-resistant. I also suggest small screw-type stainless steel hose clamps - they are a lot easier to work with and more robust with than those little wire-type clamps. Is it secure on both the carb and the petcock? Carb vent tube, the clear one - This provides atmospheric pressure to force fuel from the float bowl into the venturi . Check for pinching or blockage. Remove at the carb and blow through it. Have you installed the T-mod to avoid vent hose blockage in rain or water crossings? Carb vacuum tube - The petcock must have vacuum from the carb venturi to feed fuel to the carb float bowl. Check for pinching, blockage and leaks. Remove at carb end and suck on the tube. Does fuel flow through the carb supply line? (This is where the clear fuel supply line comes in handy.) Remove petcock end and blow through it. Is it secure on both the carb and petcock fittings? Fuel tank vent tube - I believe this tube vents the fuel tank fumes to air when the fuel and air in the tank heats up and expands. Check for blockage or pinching. Check the tube routing under the seat area closely, particularly where the seat fingers slip under the area at the rear of the fuel tank, to make sure it doesn't get pinched. Fuel tank - Do you have gas? Is the petcock set to the ON position? Check fuel level again. Is it high enough to cover the main feed line? If not, switch to REServe position. Is there enough fuel to cover the reserve feed line? Drain & check for dirt, corrosion. Disassemble tank cap and check for dirt or gasket damage or blockage of venting system. I believe this vent allows the tank to draw in air when the tank cools. Blow through the tank vent at the rear of the tank to make sure it's clear. Petcock - Check for proper operation by sucking on vacuum line (before you remove the fuel tank). Does fuel flow when you apply vacuum? (This is where the clear fuel supply line comes in handy.) Remove from fuel tank. Disassemble & check for dirt, internal damage. Inspect the filters on the feed tubes for contamination or damage. Fuel filters - in addition to the main and reserve feed line filters in the fuel tank, you may have installed an aftermarket fuel filter. Check all of these for contamination, damage or leaks. Check all fittings for security & leaks. An aftermarket filter must flow downhill, so it should be installed as close to the petcock as possible to avoid airlock. Carb - Check for leaks. Drain float bowl into a small container and check the drained gas for contamination (dirt or water). Remove float bowl and check for contamination and float damage. Check for proper operation of float needle valve. Remove carb and disassemble only after you've checked all the rest of this stuff. It's easier than taking the carb off and you have to do a good share of it first anyway. (I didn't remove the carb.) Thanks to all those list members who provided very useful suggestions for troubleshooting this problem. John Wishart 2000 KLR650 Monument, CO john.wishart@...