[dsn_klr650] tank bags & caution

[RobertWichert]

My '06 has developed a part-throttle miss/stumble and a roll-on hesitation. The miss/stumble feels like it is running out of gas. The hesitation feels like a vacuum-secondary Holley hesitation. Got any ideas???? Robert Wichert

[Jeff Saline]

On Fri, 15 Mar 2013 19:18:46 -0700 RobertWichert writes:

> My '06 has developed a part-throttle miss/stumble and a roll-on > hesitation. The miss/stumble feels like it is running out of gas. > The hesitation feels like a vacuum-secondary Holley hesitation. > > Got any ideas???? > > > Robert Wichert

<><><><><><><><> <><><><><><><><> Robert, First questions that come to mind are how long has it been sitting? Was the carb drained? Do you use fuel with ethanol in it? Probably a quick carb cleaning/inspection will fix it up. If that doesn't take care of business when were the valves adjusted last and are they at maximum specification? Does the issue go away if riding with the fuel cap cracked open? If so maybe a venting issue. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650 . . . ____________________________________________________________ "Shocking Muscle Growth" Rare Plant Increases Muscle Growth 700% - Should It Be Banned? http://thirdpartyoffers.juno.com/TGL3141/5143db3e899795b3e487bst01vuc

[RobertWichert]

I ride it every day. California gas might have stuff in it, I don't know about. I do not use E-85. The valves were adjusted 5,500 miles ago. I can check them now. Where is the vent? Robert Wichert P.Eng. LEED AP BD&C +1 916 966 9060 FAX +1 916 966 9068 ===============================================

On 3/15/2013 7:32 PM, Jeff Saline wrote: > > On Fri, 15 Mar 2013 19:18:46 -0700 RobertWichert > > writes: > > My '06 has developed a part-throttle miss/stumble and a roll-on > > hesitation. The miss/stumble feels like it is running out of gas. > > The hesitation feels like a vacuum-secondary Holley hesitation. > > > > Got any ideas???? > > > > > > Robert Wichert > <><><><><><><><> > <><><><><><><><> > > Robert, > > First questions that come to mind are how long has it been sitting? > > Was the carb drained? > > Do you use fuel with ethanol in it? > > Probably a quick carb cleaning/inspection will fix it up. If that > doesn't take care of business when were the valves adjusted last and are > they at maximum specification? > > Does the issue go away if riding with the fuel cap cracked open? If so > maybe a venting issue. > > Best, > > Jeff Saline > ABC # 4412 South Dakota Airmarshal > Airheads Beemer Club www.airheads.org > The Beautiful Black Hills of South Dakota > 75 R90/6, 03 KLR650 > > . > . > > . > __________________________________________________________ > "Shocking Muscle Growth" > Rare Plant Increases Muscle Growth 700% - Should It Be Banned? > http://thirdpartyoffers.juno.com/TGL3141/5143db3e899795b3e487bst01vuc > > [Non-text portions of this message have been removed]

[RobertWichert]

Good ideas, Eddie. But it was a full tank doing it. I didn't even know there was a strainer in the petcock. I was thinking spark plug too. ONE MORE DATA POINT... At full throttle, it seems to run OK. It's only at part throttle where it has the stumble and the hesitation, once passed, isn't an issue at full throttle, of course. Robert Wichert P.Eng. LEED AP BD&C +1 916 966 9060 FAX +1 916 966 9068 ===============================================

On 3/16/2013 4:25 AM, eddie wrote: > Robert, > Check the cheap/easy stuff first. > Here's my checklist : (you may/may not have done some or all) > Do one at a time and check for improvement. > * Drain the float bowl and check for water. > * Fill the tank with fresh gas from a different place as last time. > * Stick in a new spark plug. > * Inspect the petcock vacuum line for cracks(air leaks). > Check the carb boot clamps for tightness.(same reason) > * Disconnect the gas line at the petcock and run a temporary hose to a > clean container and crank the bike, > looking for adequate fuel flow. > If the bike runs better after new gas, it could be the formulation. It > also could be a restricted fuel strainer > in the petcock. "Weight"/pressure of the full tank could push fuel > through. > As it runs lower, that ceases - leading to the hesitation. > Unlikely. But, worth a look. > -eddie > > ----- Original Message ----- > *From:* RobertWichert > *To:* eddie > *Cc:* KLR650 list DSN_KLR650@yahoogroups.com> > *Sent:* Friday, March 15, 2013 10:18 PM > *Subject:* [DSN_KLR650] Stumble Bumble > > My '06 has developed a part-throttle miss/stumble and a roll-on > hesitation. The miss/stumble feels like it is running out of gas. > The hesitation feels like a vacuum-secondary Holley hesitation. > > Got any ideas???? > > Robert Wichert > > > [Non-text portions of this message have been removed]

[Jeff Saline]

On Sat, 16 Mar 2013 08:14:10 -0700 RobertWichert writes:

> I ride it every day. > > California gas might have stuff in it, I don't know about. I do not > use > E-85. > > The valves were adjusted 5,500 miles ago. I can check them now. > > Where is the vent? > > > Robert Wichert P.Eng. LEED AP BD&C > +1 916 966 9060 > FAX +1 916 966 9068

<><><><><><> <><><><><><> Robert, I've heard lots of bad things about fuel in CA. I doubt you'd get far on E-85 but I'll guess the fuel you are using does have ethanol in it. If I was working this issue I'd start with a complete carb cleaning and concentrate in the needle jet, atomizer and main jet area. It sounds like that is where the issue is. I'd also take a good look at the slide diaphragm for a very slight tear. It might be very difficult to detect. Some folks using CA fuels have reported failure of the float needle tip from the "additives" you have the privilege of using. The fix for that is a new needle. The vent for the fuel tank is in the fuel tank cap. You can learn more about how to inspect and clean it by checking out this thread. http://www.klr650.net/forums/showthread.php?t=101547 You may have to register and sign in to see it. The fuel tank vent hose exits at the rear of the tank just in front of the seat. If the hose is pinched it can prevent proper venting of the fuel tank. There is also a carb vent on the left side of the carb. This is the vent hose that gets the "Tee" mod. Might be worth checking that hose for obstructions but I bet it's not the issue. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650 . . . ____________________________________________________________ Woman is 53 But Looks 25 Mom reveals 1 simple wrinkle trick that has angered doctors... http://thirdpartyoffers.juno.com/TGL3141/51449ba8d01f31ba815dfst01vuc

[Jud]

That points even more strongly to a goobered up pilot jet. I'd try some SeaFoam for starters. If that doesn't clear it up, strip the carb and clean the jet. If I had some Yamaha carb cleaner on hand, I might try that as an intermediate step, but the fact that the bike runs and can be ridden suggests that Seafoam might do the trick.

--- In DSN_KLR650@yahoogroups.com, RobertWichert wrote: > > Good ideas, Eddie. But it was a full tank doing it. I didn't even know > there was a strainer in the petcock. > > I was thinking spark plug too. > > ONE MORE DATA POINT... > > At full throttle, it seems to run OK. > It's only at part throttle where it has the stumble and the hesitation, > once passed, isn't an issue at full throttle, of course. > > > Robert Wichert P.Eng. LEED AP BD&C > +1 916 966 9060 > FAX +1 916 966 9068 > > > > > > > > =============================================== > > On 3/16/2013 4:25 AM, eddie wrote: > > Robert, > > Check the cheap/easy stuff first. > > Here's my checklist : (you may/may not have done some or all) > > Do one at a time and check for improvement. > > * Drain the float bowl and check for water. > > * Fill the tank with fresh gas from a different place as last time. > > * Stick in a new spark plug. > > * Inspect the petcock vacuum line for cracks(air leaks). > > Check the carb boot clamps for tightness.(same reason) > > * Disconnect the gas line at the petcock and run a temporary hose to a > > clean container and crank the bike, > > looking for adequate fuel flow. > > If the bike runs better after new gas, it could be the formulation. It > > also could be a restricted fuel strainer > > in the petcock. "Weight"/pressure of the full tank could push fuel > > through. > > As it runs lower, that ceases - leading to the hesitation. > > Unlikely. But, worth a look. > > -eddie > > > > ----- Original Message ----- > > *From:* RobertWichert > > *To:* eddie > > *Cc:* KLR650 list DSN_KLR650@yahoogroups.com> > > *Sent:* Friday, March 15, 2013 10:18 PM > > *Subject:* [DSN_KLR650] Stumble Bumble > > > > My '06 has developed a part-throttle miss/stumble and a roll-on > > hesitation. The miss/stumble feels like it is running out of gas. > > The hesitation feels like a vacuum-secondary Holley hesitation. > > > > Got any ideas???? > > > > Robert Wichert > > > > > > > > > > [Non-text portions of this message have been removed] >

[RobertWichert]

OK, I ask again... Isn't the pilot jet totally out of the picture at part throttle? Robert Wichert P.Eng. LEED AP BD&C +1 916 966 9060 FAX +1 916 966 9068 ===============================================

On 3/16/2013 2:06 PM, Jud wrote: > > That points even more strongly to a goobered up pilot jet. I'd try > some SeaFoam for starters. If that doesn't clear it up, strip the carb > and clean the jet. If I had some Yamaha carb cleaner on hand, I might > try that as an intermediate step, but the fact that the bike runs and > can be ridden suggests that Seafoam might do the trick. > > --- In DSN_KLR650@yahoogroups.com > , RobertWichert wrote: > > > > Good ideas, Eddie. But it was a full tank doing it. I didn't even know > > there was a strainer in the petcock. > > > > I was thinking spark plug too. > > > > ONE MORE DATA POINT... > > > > At full throttle, it seems to run OK. > > It's only at part throttle where it has the stumble and the hesitation, > > once passed, isn't an issue at full throttle, of course. > > > > > > Robert Wichert P.Eng. LEED AP BD&C > > +1 916 966 9060 > > FAX +1 916 966 9068 > > > > > > > > > > > > > > > > =============================================== > > > > On 3/16/2013 4:25 AM, eddie wrote: > > > Robert, > > > Check the cheap/easy stuff first. > > > Here's my checklist : (you may/may not have done some or all) > > > Do one at a time and check for improvement. > > > * Drain the float bowl and check for water. > > > * Fill the tank with fresh gas from a different place as last time. > > > * Stick in a new spark plug. > > > * Inspect the petcock vacuum line for cracks(air leaks). > > > Check the carb boot clamps for tightness.(same reason) > > > * Disconnect the gas line at the petcock and run a temporary hose > to a > > > clean container and crank the bike, > > > looking for adequate fuel flow. > > > If the bike runs better after new gas, it could be the > formulation. It > > > also could be a restricted fuel strainer > > > in the petcock. "Weight"/pressure of the full tank could push fuel > > > through. > > > As it runs lower, that ceases - leading to the hesitation. > > > Unlikely. But, worth a look. > > > -eddie > > > > > > ----- Original Message ----- > > > *From:* RobertWichert > > > *To:* eddie > > > *Cc:* KLR650 list DSN_KLR650@yahoogroups.com > > > > > *Sent:* Friday, March 15, 2013 10:18 PM > > > *Subject:* [DSN_KLR650] Stumble Bumble > > > > > > My '06 has developed a part-throttle miss/stumble and a roll-on > > > hesitation. The miss/stumble feels like it is running out of gas. > > > The hesitation feels like a vacuum-secondary Holley hesitation. > > > > > > Got any ideas???? > > > > > > Robert Wichert > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > [Non-text portions of this message have been removed]

[Michael Martin]

Robert, Here's some info on how the carb operates: http://www.gadgetjq.com/keihin_carb.htm It indicates that the pilot jet has an effect at up to abut 1/4 throttle (see illustration at Part II). Mike Martin, Louisville, KY ________________________________ From: RobertWichert OK, I ask again... Isn't the pilot jet totally out of the picture at part throttle? [Non-text portions of this message have been removed]

[ron criswell]

I am trying some new stuff called Star Tron that one of the bike mags recommended to use in crappy moonshine gas. The tech article said BMW started recommending it to use in their bikes after a series of fuel injection failures in their bikes caused by moonshine gas. Right now I am using it in the Concours as it is the one that always has problems if it sits up. Supposed to be an alternative to overhauling carburetors. I would rather take a beating than pull off 4 carbs. I will keep y'all posted. So far the bike seems to be running better plus getting better milage. It has 62,000 on the clock. The KLR never screws up or is hard to start. Criswell Sent from my iPad

On Mar 16, 2013, at 4:06 PM, "Jud" wrote: > That points even more strongly to a goobered up pilot jet. I'd try some SeaFoam for starters. If that doesn't clear it up, strip the carb and clean the jet. If I had some Yamaha carb cleaner on hand, I might try that as an intermediate step, but the fact that the bike runs and can be ridden suggests that Seafoam might do the trick. > > --- In DSN_KLR650@yahoogroups.com, RobertWichert wrote: > > > > Good ideas, Eddie. But it was a full tank doing it. I didn't even know > > there was a strainer in the petcock. > > > > I was thinking spark plug too. > > > > ONE MORE DATA POINT... > > > > At full throttle, it seems to run OK. > > It's only at part throttle where it has the stumble and the hesitation, > > once passed, isn't an issue at full throttle, of course. > > > > > > Robert Wichert P.Eng. LEED AP BD&C > > +1 916 966 9060 > > FAX +1 916 966 9068 > > > > > > > > > > > > > > > > =============================================== > > > > On 3/16/2013 4:25 AM, eddie wrote: > > > Robert, > > > Check the cheap/easy stuff first. > > > Here's my checklist : (you may/may not have done some or all) > > > Do one at a time and check for improvement. > > > * Drain the float bowl and check for water. > > > * Fill the tank with fresh gas from a different place as last time. > > > * Stick in a new spark plug. > > > * Inspect the petcock vacuum line for cracks(air leaks). > > > Check the carb boot clamps for tightness.(same reason) > > > * Disconnect the gas line at the petcock and run a temporary hose to a > > > clean container and crank the bike, > > > looking for adequate fuel flow. > > > If the bike runs better after new gas, it could be the formulation. It > > > also could be a restricted fuel strainer > > > in the petcock. "Weight"/pressure of the full tank could push fuel > > > through. > > > As it runs lower, that ceases - leading to the hesitation. > > > Unlikely. But, worth a look. > > > -eddie > > > > > > ----- Original Message ----- > > > *From:* RobertWichert > > > *To:* eddie > > > *Cc:* KLR650 list DSN_KLR650@yahoogroups.com> > > > *Sent:* Friday, March 15, 2013 10:18 PM > > > *Subject:* [DSN_KLR650] Stumble Bumble > > > > > > My '06 has developed a part-throttle miss/stumble and a roll-on > > > hesitation. The miss/stumble feels like it is running out of gas. > > > The hesitation feels like a vacuum-secondary Holley hesitation. > > > > > > Got any ideas???? > > > > > > Robert Wichert > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > [Non-text portions of this message have been removed]

[RobertWichert]

Thanks Mike, That is a good resource. I'm sure I was over 1/4 throttle though, so probably not the pilot jet. The writeup is great though. Thanks again for sending it! Robert Wichert P.Eng. LEED AP BD&C +1 916 966 9060 FAX +1 916 966 9068 ===============================================

On 3/16/2013 7:01 PM, Michael Martin wrote: > Robert, > > Here's some info on how the carb operates: > > http://www.gadgetjq.com/keihin_carb.htm > > It indicates that the pilot jet has an effect at up to abut 1/4 > throttle (see illustration at Part II). > > Mike Martin, > Louisville, KY > > ------------------------------------------------------------------------ > *From:* RobertWichert > > > OK, I ask again... > > Isn't the pilot jet totally out of the picture at part throttle? > > > [Non-text portions of this message have been removed]