Desperate Carb Help Needed!

[spyder2120]

is the air filter (filters) clean? if you didnt put it on then i wouldnt trust the po's word as to the newness of them, not to mention that if they look new they could have been sitting around for a while getting either brittle or clogged by dust. maybe the air folw is restricted. just a thought.

 

[teet]

is the air filter (filters) clean? if you didnt put it on then i wouldn't trust the po's word as to the newness of them, not to mention that if they look new they could have been sitting around for a while getting either brittle or clogged by dust. maybe the air folw is restricted. just a thought.

Thats a good thought as well....It has UNI pod filters on it now, and they are in decent shape. I tried all of my previous fixes both with them on and off, and it made no difference.

The po was also a member on this board, so he was somewhat knowledgeable regarding the stator fixes, and what not, and he did upgrade alto of the wiring, but I'm afraid I'm going to have to dig into that again to rule everything out.

Thanks for your help...I think I just need to let it sit for a few days, and come back to it..I have a problem with patience, and sometimes it gets the best of me..lol

Thanks

Jeff (teet)

 

[spyder2120]

i feel ya man.

 

[Spyderman]

ok it sounds to me that your way too rich on the mains and a little lean on the pilots
even with the 4 into 1 and pods and i assume that you have stock VM26's

in stock form the mains were #95 and the pilots were #15
now with a pipe and pods in place you should need the following settings

main jet 100 or 102.5
pilot jet 17.5 maybe 20
fuel mixture screw 3/4 of a turn out to start
(this one is subjective you need to run the bike from idle to 1/4 throttle and then do a plug chop to see if it needs to be turned in or out to get the correct mixture on the pilot circuit)
air screws start at 1 1/2 turns out (adjust for highest RPM)

I'm betting that your pilots are lean and that is why it won't start there is just not enough fuel to get it to fire
as for the mains well there most likely way too rich and that is why you get fouled plugs

some basics on tuning
remember that each circuit corresponds to a throttle opening (not RPM)
idle to 1/4 pilot
1/4 to 3/4 jet needle
3/4 to WOT main jet
don't forget that each circuit overlaps the previous one and float height affects all circuits
if your mains are too rich then your jet needle will also be too rich as the fuel is coming in though the main jet and is then metered by the needle to be correct

under normal circumstances you should start with the main jet and work down to the pilot
however you can't get it to start so start with the pilot and go from there
this will be a trial and error effort you need to get it to idle first then once you have that ride it and see what it does then come home make a change and ride it see what difference that made and do a plug chop see what the plugs tell you
then go home make another change and ride it again do this till you get it right
here is a plug chart to help you in reading your plugs
http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html
you can print this and have a hard copy to use when checking your plugs

i hope i have shed some light on this for you and helped you out a bit or at least put you on the right track to getting your bike running well

 

[teet]

i feel ya man.

Thanks spyder....

I'll get her going. I just need to take a step back, and think things over, and start ruling out all other possible problems. I'll come back to her in a few days when my stress level has deminished..lol

SIDE NOTE: I did notice that she starts up much better when I leave it in the prime position for a while, but when I switch over to "on" it will fizzle out, then the bowls seem to be "empty"...any ideas?? The petcock is a brand new vacuum one from Z1 with less than 5 miles on it. I pulled the hose, and cranked the engine and it does flow...???

Thanks

Jeff (teet)

 

[Guest]

ok it sounds to me that your way too rich on the mains and a little lean on the pilots
even with the 4 into 1 and pods and i assume that you have stock VM26's

in stock form the mains were #95 and the pilots were #15
now with a pipe and pods in place you should need the following settings

main jet 100 or 102.5
pilot jet 17.5 maybe 20
fuel mixture screw 3/4 of a turn out to start
(this one is subjective you need to run the bike from idle to 1/4 throttle and then do a plug chop to see if it needs to be turned in or out to get the correct mixture on the pilot circuit)
air screws start at 1 1/2 turns out (adjust for highest RPM)

I'm betting that your pilots are lean and that is why it won't start there is just not enough fuel to get it to fire
as for the mains well there most likely way too rich and that is why you get fouled plugs

some basics on tuning
remember that each circuit corresponds to a throttle opening (not RPM)
idle to 1/4 pilot
1/4 to 3/4 jet needle
3/4 to WOT main jet
don't forget that each circuit overlaps the previous one and float height affects all circuits
if your mains are too rich then your jet needle will also be too rich as the fuel is coming in though the main jet and is then metered by the needle to be correct

under normal circumstances you should start with the main jet and work down to the pilot
however you can't get it to start so start with the pilot and go from there
this will be a trial and error effort you need to get it to idle first then once you have that ride it and see what it does then come home make a change and ride it see what difference that made and do a plug chop see what the plugs tell you
then go home make another change and ride it again do this till you get it right
here is a plug chart to help you in reading your plugs
http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html
you can print this and have a hard copy to use when checking your plugs

i hope i have shed some light on this for you and helped you out a bit or at least put you on the right track to getting your bike running well

Good info, but I would disagree regarding the pilot. My 1000 has K&N's, a Jardine 4-1, and a Dynojet jet kit and stock #15 pilots. Dynojet recommends you keep the stock pilots. With a stock engine, you should be able to compensate simply by adjusting the pilot fuel screw out.

 

[Guest]

SIDE NOTE: I did notice that she starts up much better when I leave it in the prime position for a while, but when I switch over to "on" it will fizzle out, then the bowls seem to be "empty"...any ideas?? The petcock is a brand new vacuum one from Z1 with less than 5 miles on it. I pulled the hose, and cranked the engine and it does flow...???

That's a huge "side note". You still have a problem with your petcock. Sounds like it's not flowing enough. Leave it on prime and see what happens. It won't hurt anything unless you have bad float needles, in which case you will flood the carbs. Also make sure you don't have any low spots on the fuel line going to the carbs. It is a gravity flow system.

 

[teet]

Good info, but I would disagree regarding the pilot. My 1000 has K&N's, a Jardine 4-1, and a Dynojet jet kit and stock #15 pilots. Dynojet recommends you keep the stock pilots. With a stock engine, you should be able to compensate simply by adjusting the pilot fuel screw out.

Interesting guys...Thanks! When I had her somewhat spitting and sputtering, I was trying every possible adjustment on both screws, and it really didn't run any different?

Heres the kicker spyder..the po has 110's installed already with the stock exhaust and pods. So i may need to actually go down in main jet size eventually? Right? But it ran PERFECT with the holey stock exhaust, pods and 110's..he had all the pilots like 1/2 out and the fuel screws like 3/4 out??

Mass confusion!!! Anyone want a pos GS1000 cheap! lol

Jeff (teet)

 

[teet]

That's a huge "side note". You still have a problem with your petcock. Sounds like it's not flowing enough. Leave it on prime and see what happens. It won't hurt anything unless you have bad float needles, in which case you will flood the carbs. Also make sure you don't have any low spots on the fuel line going to the carbs. It is a gravity flow system.

Ahh yes Bruce! I do know that the fuel like makes a nice low swooping arch down by the engine case, and come back up under the carbs, this could really be the problem? I'm wondering why it didn't matter before I swapped out this exhaust. It ran well, and I put several hundred miles on it with the line like that..hmm..but maybe the screen is clogged a bit on the new petcock? The tank is new to me as well, it was very clean inside, but may of had some particles left from when the seller of the tank cleaned it out...I guess I'm going to have to start from the beginning, and rule out EVERYTHING..I didn't think about the petcock since its brand new. Ya know, when I had her running momentarily, I took her up the road, and she would get to the point where she just started to die, like running out of gas, until I pulled the choke...after the last time I pulled the carbs and went to drain the bowls, they were empty..hmm. Thanks for giving me some more ideas. I bet it's simpler than I think!

Jeff (teet)

 

[Spyderman]

Good info, but I would disagree regarding the pilot. My 1000 has K&N's, a Jardine 4-1, and a Dynojet jet kit and stock #15 pilots. Dynojet recommends you keep the stock pilots. With a stock engine, you should be able to compensate simply by adjusting the pilot fuel screw out.

fair enough
i can't really tell him exactly what to do with the 26's and a stock engine because i'm no where near stock
ported and polished head cams (degreed) 29mm smoothies K&N's hindle race pipe
so you may be right about the pilots i just was hoping to put him on the right track to get it running and sorted out

on another note bruce are you selling those oil pressure gauges on e bay if so i would like to talk to you about getting one
thanks

 

[Guest]

Ahh yes Bruce! I do know that the fuel like makes a nice low swooping arch down by the engine case, and come back up under the carbs, this could really be the problem? I'm wondering why it didn't matter before I swapped out this exhaust. It ran well, and I put several hundred miles on it with the line like that..hmm..but maybe the screen is clogged a bit on the new petcock? The tank is new to me as well, it was very clean inside, but may of had some particles left from when the seller of the tank cleaned it out...I guess I'm going to have to start from the beginning, and rule out EVERYTHING..I didn't think about the petcock since its brand new. Ya know, when I had her running momentarily, I took her up the road, and she would get to the point where she just started to die, like running out of gas, until I pulled the choke...after the last time I pulled the carbs and went to drain the bowls, they were empty..hmm. Thanks for giving me some more ideas. I bet it's simpler than I think!

Jeff (teet)

I would say you may have already found your problem. If the bowls are empty she ain't gunna start.

 

[Guest]

on another note bruce are you selling those oil pressure gauges on e bay if so i would like to talk to you about getting one
thanks

PM sent....

 

[teet]

I would say you may have already found your problem. If the bowls are empty she ain't gunna start.

Problem solved!!

It was a little of this and a little of that. First, the fuel line was wayyy too long, and was basically resting on the engine near the sprocket cover..then it had to go way up into the carbs from that far down. Second, I pulled the bowls again, and they were full of grimy, sandy, junk...I cleaned the bowls out real good, replaced the 115's with the 110's that were in it before. I then put on a new fuel line 1/3 the length of the old one, and swiveled the nipple on the carb up, so its a straight shot from the petcock to the carbs now. I pulled the petcock to verify the screen was clean, and it was spotless.

Sooo..I buttoned her all back up, turned the petcock to prime, turned the fuel and air screws out 1 turn, and she fired instantly, switched the petcock to "on", popped the choke off, and adjusted the idle down to around 1k....she purrs now! Took her for a 10 mile ride, and no issues..throttle response is quick, and she gets up and goes. I still need to adjust the air, and fuel screws a tad, as she puffs a tiny bit of black smoke when revving at high rpm's, so I'm guessing she's still a tad rich, but the plugs look really good. Unreal how something so simple can make me so nuts!

Thanks everyone for the insight! Now I have a bunch of extra jets I didn't even need,,ugh:lol:

Jeff (teet)

 

[Spyderman]

Problem solved!!

It was a little of this and a little of that. First, the fuel line was wayyy too long, and was basically resting on the engine near the sprocket cover..then it had to go way up into the carbs from that far down. Second, I pulled the bowls again, and they were full of grimy, sandy, junk...I cleaned the bowls out real good, replaced the 115's with the 110's that were in it before. I then put on a new fuel line 1/3 the length of the old one, and swiveled the nipple on the carb up, so its a straight shot from the petcock to the carbs now. I pulled the petcock to verify the screen was clean, and it was spotless.

Sooo..I buttoned her all back up, turned the petcock to prime, turned the fuel and air screws out 1 turn, and she fired instantly, switched the petcock to "on", popped the choke off, and adjusted the idle down to around 1k....she purrs now! Took her for a 10 mile ride, and no issues..throttle response is quick, and she gets up and goes. I still need to adjust the air, and fuel screws a tad, as she puffs a tiny bit of black smoke when revving at high rpm's, so I'm guessing she's still a tad rich, but the plugs look really good. Unreal how something so simple can make me so nuts!

Thanks everyone for the insight! Now I have a bunch of extra jets I didn't even need,,ugh:lol:

Jeff (teet)

glad you got it fixed up i still think that 110's are rich for that set up go trade those big jets in for some 102.5 105 and 107.5 and test it out to see what works best read the plugs and see what they tell you
good luck

 

[teet]

glad you got it fixed up i still think that 110's are rich for that set up go trade those big jets in for some 102.5 105 and 107.5 and test it out to see what works best read the plugs and see what they tell you
good luck

Thanks...thats probably why the little puff. Yeah I should probably drop a couple sizes. Hopefully Z1 will swap some back, I bought 115, 117.5, and 120's??

Thanks!

Jeff (teet)

 

[Dave8338]

How those New jets working for ya?

 

[teet]

How those New jets working for ya?

Your too funny dave!!:lol: Well, they cost me $20 and I cant even use them for paper weights!


I know, I know..thats what my impatience gets me!


Jeff (teet)

 

[Dave8338]

Glad to hear that you got it sorted out. Almost ALWAYS something simple with these bikes...

 

[teet]

Glad to hear that you got it sorted out. Almost ALWAYS something simple with these bikes...

Thanks to you and everyone else that helped. Thanks again


Jeff (teet)

 

[Guest]

Problem solved!!

I love a happy ending. sniff, sniff