Idle Problem... Help, please!

[rauns20]

I have a 1991 Kat 600, just got it over the winter. It wasn't running well at all when I got it.

I changed the clutch and went through the carbs and cleaned them out really well, and now it runs very well when I'm on the throttle. I did find that it has a DynoJet jet kit, V&H full exhaust and a K&N air filter.

The problem I'm having is that when I'm off the throttle it will either idle so low that it will eventually stall out (less then 500RPM) or if I turn the idle screw up just a bit it jumps up and idles at between 3000 and 4000 RPM. I can't get it to an in between point. As far as I know there are no vacuum leaks (the only vacuum port is the one going to the fuel tank, right?). I have the prime screws adjusted out to 3.5 turns, and the carbs are synched. Any ideas???

[elkat]

They will tell you to install a stock air filter, and see what you have after that. Then you will be able to see where you are at.

[mac.g]

a freind of mine is having the "EXACT" same probs with a trophy 900 (stock)


HELP!!!!!!....PLEEEEEEEEASE!

[WyredHardware]

I had that problem... it turned out to be a cracked spark plug wire... below 3k the spark would ark to the block and not the plug.... speaking of plugs check them too

[scottynoface]

in lieu of md86's absence:

check your plugs

[arsenic]

your all wrong, the problem with the idle is the K&N air filter, go back to stock, trust me, it will go away.

They will tell you to install a stock air filter, and see what you have after that. Then you will be able to see where you are at.

that is an excellent statement

[Wreckie29]

i got my idling at 2000rpms cause it doesn't have a jet kit to go with the vance and hines exhaust and carb pods the dealer said i needed a stage 3 race jet kit and to reset the mixture screws to get mine to idle lower

[arsenic]

really, have you guys read anything on here? Do you have any idea what a nightmare pods are. If your dealer tells you you need a stage 3 for them, let me guess, your buying the stage 3 from the dealer?

[Wreckie29]

really, have you guys read anything on here? Do you have any idea what a nightmare pods are. If your dealer tells you you need a stage 3 for them, let me guess, your buying the stage 3 from the dealer?

no im idling a 2000rpms cause the stage 3 is 100 dollars that i aint got but yeah i want the stage 3 and have from the get go i don't have smog checks and my stock air box is and always will be lost with one of the previous owners that took it a part never thinking it would be any more than a parts bike after dropping it a 70+ mph

[IndyGunner]

Get Rid Of The Kn

[arsenic]

trust me a stage 3 is NOT gonna fix that, you can try if that makes you feel better though.

[Wreckie29]

trust me a stage 3 is NOT gonna fix that, you can try if that makes you feel better though.

it might but really im just happy to have a bike to ride

[fireman1724]

K&N is way over rated

[arsenic]

not true, K&N is awesome. Just not on a Katana. K&N as a whole is NOT way over rated.

[mac.g]

sorry to hijack guys but the trophy has

no k+n
new plugs
cleaned carbs
no (visible/audible) airleaks

and still "mainly on cold startup" it revs way too high?

when its warm it seems to settle down??


if i am "out of order here, just ignore......but as it has similar problems to the KAT, i thought i'd ask!