RPM's Drop with Throttle

[JunoAF]

Hey all, been working on my bike the last two days trying to get it back on the road. But, a new problem has come up. Whenever i open up the throttle the RPMs drop almost to stall unless i back off. All ive done to the bike since i pulled it out of the garage was clean the Carbs out. Any ideas? thanks!

Nate

[McBiggity]

check the air filter. Clean as needed.

[Cerberus]

sounds like dirty jets or bad fuel or improper adjustment

if you have a tps, sometimes a bad or disconnected tps can cause that kind of problem too

[JunoAF]

whats a tps again?

[butcher bergs]

Could be clogged/ blocked pilots and/ or mains in the carb bank

spark plugs could be just about fouled

bad fuel

mice in the airbox

kinked fuel line

There's more...

[OreoGaborio]

1988 Ninja 600R?

No tps. (throttle position sensor)

If it ran fine last fall but not anymore, check the basics which Bergs listed.

[RyanNicholson]

your throttle is upside down, flip it over so rpms go up instead

[JunoAF]

okyes, theres no TPS lol

as for the spark plugs: Would i have problems getting the bike started if they were fouled too?

what else should i look for? just let me have them Bergs. Its nice out so i dont mind looking lol.

Checked the Fuel Line and it looks good

[KB]

If it ran before you cleaned the carbs then I would say you might have eff'd something up when you cleaned the carbs.

KB

[JunoAF]

but i didnt do anything different than i usually do when i clean carbs. I checked and replaced all the components (that I could get to as Kawasaki has sealed some parts of the carb off from the public) back to the way they were. I double and triple checked my work

[butcher bergs]

as for the spark plugs: Would i have problems getting the bike started if they were fouled too?

what else should i look for? just let me have them Bergs. Its nice out so i dont mind looking lol.

Checked the Fuel Line and it looks good

Plugs can be the root cause of many running and/ or starting issues.....carbs too (obviously).

Go over the simple things first. Like others have stated, if it ran when you stored it and it doesn't run correctly now, best to check the easy stuff.

Once all that checks out fine you move to the electrical (however I'm of the opinion that would be jumping the gun so I'd hold off until you have the fueling squared away).

Since you were in the carbs already you very well may have installed something backwards, upside down, inverted, bent, broken, etc.

I'm saying plugs and/or carbs on this one.

[Paul_E_D]

The symptom is exactly what plugged pilot jets do. They need to be reamed out with pressurized air...

[JunoAF]

ok cool, thanks guys. I'll go down and pull the carbs again and re-clean just to make sure. I guess there is a very good possibility that I installed something backwards or missed something. I'll post up tomorrow if i find anything

[Stiggy]

Wirelessly posted (Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 6.12) 320x320; VZW; UTStar-XV6800; Window Mobile 6.0 Professional

TPS is trottle position sensor. doubt you have one on a carbed bike. sounds like you might have an intake leaks. check the carbs for proper seating.

[butcher bergs]

TPS is trottle position sensor. doubt you have one on a carbed bike.

I have one on my carbed bike...

[Manny]

I have one on my carbed bike...

yes, but you are BERGS....rules do not apply

[butcher bergs]

yes, but you are BERGS....rules do not apply

Finally! Someone who gets it!

[Cerberus]

Wirelessly posted (Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 6.12) 320x320; VZW; UTStar-XV6800; Window Mobile 6.0 Professional

TPS is trottle position sensor. doubt you have one on a carbed bike. sounds like you might have an intake leaks. check the carbs for proper seating.

there were a few carbed bikes that came down the assembly line with a tps. presumably for spark control.

for instance...

I have one on my carbed bike...

[DuncanMoto]

Clogged jets are my vote.
If it runs just run gas with Sea Foam through it for 10 minutes. Let it sit for 2 days, then it will run fine. ;-)

If not then it was something else, but you only spent 10 work minutes figuring it out.

[KB]

Is this Sea Foam stuff for real or is it one of these internet myths?

Anyone ever uses and had great results? I've been curious about this Sea Foam stuff.

KB

[butcher bergs]

It has many applications though it's not the first thing I reach for in my tool kit.

I'm about to use it to de-carbon the top end in my truck.....add it directly into the brake booster line, run, change oil, done.

It has cleared up some issues with bikes I've worked on but I'm in the camp of going in and physically cleaning carbs.

[Cerberus]

Is this Sea Foam stuff for real or is it one of these internet myths?

Anyone ever uses and had great results? I've been curious about this Sea Foam stuff.

KB

i heard nothign but good about it, but never used it myself that i remember

[DuncanMoto]

Is this Sea Foam stuff for real or is it one of these internet myths?

Anyone ever uses and had great results? I've been curious about this Sea Foam stuff.

KB

Well here's what it did for me. Bergs picked up my wife's newish 2009 KLX250 a couple of weeks ago and brought it to me. It had 270 miles on it. The kid I got it off of let it sit since August with gas in it. Bergs can attest that it would only idle and not run. I mean you twist the throttle and it would die. We let it warm up for 10 minutes on choke and still it would not run. So I was thinking "DAMN I have to take apart the carb on a new bike cause the guy didn't know any better to use stabil." Anyway Bergs said "hey why don't you try seafoam?" and said "what the f%$! is seafoam?"

So I did my research and ended up calling the company. Per their instructions, I mixed a gallon of gas with ___ Ounces of Seafoam got the bike to idle for about 10 minutes so the new fuel mix would be in the carbs. Tried to open throttle and then killed the engine by opening throttle. I them proceeded to pump the throttle and flood the carb. I let it sit for 2 days. I pumped the throttle the second day to try to get more gas flooding into the carb. after the second day I tried to start it. It took a little to get it warmed up and after about 10 minutes the thing really came to life. Ran a little rough with the mix, so I drained it and put in fresh gas. Runs great now. I put the rest of the mixed gas in my ford explorer figuring it won't hurt it. 30 miles later my check engine light has gone off after it's been on for over 6 months

In other words not a myth. And yes I will become a dealer for their products shortly.

[JunoAF]

hey all, sorry it took me longer than expected...im lazy and its been cold. Anyway, since it was so nice of a day i pulled my carbs again to clean them out. Checked my airbox and what do you know...a fur and skeleton bundle was hangin out in the corner. I dont think this had that much to do with my problem because the carcass was all i found and it looks like hes been dead a long time. Anyway, i did look at my jets again and this time i found they were partially covered in this bluish/green film. some still slimy and some dried on. What is this crap? Bad gas? is it the fuel stabilizer? im thinking that might of been my problem like you guys said. what do you think?

[Cerberus]

don't honestly know this for sure, but i always tend to think blue/green deposits are from 2-stroke fuel being put in..

but yeah, clean up all traces of that garbage and you should be fine