[minutiesabotage]

I agree, but its a simple way to be sure. How long of a spark can you get out of plugs?

Just don't shock yourself when checking, it doesnt feel good.

[jbloudg20]

Originally Posted by minutiesabotage

I agree, but its a simple way to be sure. How long of a spark can you get out of plugs?

Just don't shock yourself when checking, it doesnt feel good.

Haven't checked yet. Pulling all that shit off is a pita and I'm commuting with the bike right now

[OreoGitorio]

Originally Posted by jbloudg20

I have not emptied the tank.

Check the fuel. Water is a very real possibility & it's about the easiest thing you could possibly check for. You could be going in circles trying to find an electrical problem when the problem is just contaminated fuel.

Water sinks to the bottom of the float bowls... when the RPM's and throttle position increases, it sucks fuel outta the bowls faster & stirs up the water... thus if there's not MUCH water in the bowls, this is why it runs fine down low but not up top.

ALWAYS check the easy shit first, even if it's not what you think it is. At least once a year I hear someone complain of a poorly running bike & they go crazy going through the whole thing w/o finding a single problem... only to find out that there was condensation in the fuel.

[jbloudg20]

Originally Posted by OreoGitorio

Check the fuel. Water is a very real possibility & it's about the easiest thing you could possibly check for. You could be going in circles trying to find an electrical problem when the problem is just contaminated fuel.

Water sinks to the bottom of the float bowls... when the RPM's and throttle position increases, it sucks fuel outta the bowls faster & stirs up the water... thus if there's not MUCH water in the bowls, this is why it runs fine down low but not up top.

ALWAYS check the easy shit first, even if it's not what you think it is.

Will do.

Would this only happen when the bike is not under a load? It revs fine with the clutch pulled.

[OreoGitorio]

When the bike is under load it requires more throttle to get it up to the "Symptom RPM".

It doesn't HAVE to be under load to get the symptoms, but it sure helps magnify them.


BTW, it's nearly impossible to diagnose a bike over the internet... I'm not saying it IS water in the fuel, just that there's no reason not to check for it... You're going through a process of elimination... the goal is to eliminate all the possibilities.

[jbloudg20]

Thanks, I'll give it a go.

[minutiesabotage]

I thought you said it was RPM related? If it revs over 7500 at idle you're ignition is probably OK. Why don't you just throw some Dry-gas in it while your commuting? Not the ideal solution but its one of the easiest.

[jbloudg20]

Originally Posted by minutiesabotage

I thought you said it was RPM related? If it revs over 7500 at idle you're ignition is probably OK. Why don't you just throw some Dry-gas in it while your commuting? Not the ideal solution but its one of the easiest.

When in neutral it revs just fine. When under load, it wont rev past ~7500. This value, however, changes.

For example: I noticed the other day if I'm in 6th gear, it wont rev past about 5k. Top speed is currently 80mph.

[Crash Dummy Denno]

Originally Posted by rmbbikes

Kill yourself now before that Katana does first.

KB

wwoooaaah woah haha puhahaha SNAP

[minutiesabotage]

Sounds like a fuel problem to me then. After checking the basics, ie, trying dry gas, and/or checking for water, you could be looking at a fuel starvation problem. Did the bike ever run OK? If yes, it could be a diaphram issue.

I am speculating, but I am quite bored at work today, so I have plenty of time to think about random shit.

[jbloudg20]

Originally Posted by minutiesabotage

Sounds like a fuel problem to me then. After checking the basics, ie, trying dry gas, and/or checking for water, you could be looking at a fuel starvation problem. Did the bike ever run OK? If yes, it could be a diaphram issue.

I am speculating, but I am quite bored at work today, so I have plenty of time to think about random shit.

It never ran ok for me, but I've had it for about 400 miles.

I'll give the dry gas a shot. Thanks for the help.

[OreoGitorio]

Dry gas = ethanol. There's no point in adding it since pump gas already contains so much of it. Besides, it doesn't get rid of the water, it just keeps it in solution (poorly) till your bike burns off all the shit gas.

If you're gonna do it, do it right. Water sinks to the bottom. Drain the tank (on reserve) till no more water comes out & presto... done.

That is, IF this is the issue. We're getting ahead of ourselves assuming it is... check for it first. If it's there, well then, just keep checking till it's gone.

[jbloudg20]

Originally Posted by OreoGitorio

Ethanol (dry gas) sucks. There's no point in adding it since pump gas already contains so much of it. Besides, it doesn't get rid of the water, it just keeps it in solution till your bike burns off all the shit gas.

If you're gonna do it, do it right. Water sinks to the bottom. Drain the tank (on reserve) till no more water comes out & presto... done.

That is, IF this is the issue. We're getting ahead of ourselves assuming it is... check for it first. If it's there, well then, just keep checking till it's gone.

You got it chief. Thanks for the help.

[minutiesabotage]

Originally Posted by OreoGitorio

Dry gas = ethanol. There's no point in adding it since pump gas already contains so much of it. Besides, it doesn't get rid of the water, it just keeps it in solution (poorly) till your bike burns off all the shit gas.

If you're gonna do it, do it right. Water sinks to the bottom. Drain the tank (on reserve) till no more water comes out & presto... done.

That is, IF this is the issue. We're getting ahead of ourselves assuming it is... check for it first. If it's there, well then, just keep checking till it's gone.

I agree, but since your commuting on the bike, theres a good chance you go through gas a lot and don't want to screw with the bike during the week in case something goes wrong. Stuff costs $1 or $2, worth a shot.

[jbloudg20]

Originally Posted by minutiesabotage

I agree, but since your commuting on the bike, theres a good chance you go through gas a lot and don't want to screw with the bike during the week in case something goes wrong. Stuff costs $1 or $2, worth a shot.

Although I can see where you are coming from... its not a big deal. Even if somehting did go wrong, I can just take my car.

[minutiesabotage]

Crisis.....averted

[loridin64]

ummm, anyone think of fuel filter?
also, do you know if your carbs have different 'tubes' for different RPM ranges? some bikes have a set of tubes in the carbs that go into the bowl to draw fuel, if your high rpm tube(s) is/are gummed up.... it wont suck the fuel

[minutiesabotage]

I believe he said somewhere that he was buying a new filter.

[minutiesabotage]

Any news? I'm curious what the problem was.

[jbloudg20]

No news yet.

[jbloudg20]

I checked the resistance on the coils last night, and they checked out fine. I couldn't check the output voltage on them, however.

I am setting up a time to meet with a local guy to check out the carbs. I hope that fixes it.

[mosc]

is it used..? does it have a rev limiter??

[jbloudg20]

Originally Posted by mosc

is it used..? does it have a rev limiter??

Umm yeah the rev limiter is 11k like it should be. And ye sit is a used bike. Could have sworn I said that already.

[minutiesabotage]

Once a thread gets to more than a few posts, most people don't read thing full thing, it happens.

As for coils...I doubt its ignition anyway, but you can't always trust resistance tests. An internal jump will only occur in operation, not the low voltage of a multimeter.

[jbloudg20]

Originally Posted by minutiesabotage

Once a thread gets to more than a few posts, most people don't read thing full thing, it happens.

As for coils...I doubt its ignition anyway, but you can't always trust resistance tests. An internal jump will only occur in operation, not the low voltage of a multimeter.

Its POSSIBLE that it could be the coild, but were talking about a bike with 6500 miles. I'm willing to bet its carbs.