hesitation after installing dyno jet kit and k&n
 

i had my hawk in to a v twin dealer and by surprise he says "ive never worked one one of these before",and im like well should just do it myself then !well i had him do the jet kit and the sync and now i have a hell of a hesitation off idle !is this normal ?my brother has a 01 hawk and his does it too is there a fix for this?i have alot of little pfobs with this bike but i am never getting rid of it .it is to nice!i have installed rear tail section which makes it look badass and will have pics up in not to long !any info will be appreciated and i will give any info yall need to diagnose this bike !i think i ended up paying 700 dollars to get it out but i did buy neww d208 to put on it also which was 350 for both thanks guys i also did the tps mod on it too the 5ohm thing too

Shimming the jet needles .040" - .060" should help, I had to do this when I fitted a K&N and I'm using stock pipes with the TPS adjusted @ 430.

The K&N flows so much more than stock you need to shim the needles even on an otherwise stock bike. If your 'kit needles' have clip adjustment raise them, otherwise you can shim them with small washers avilable at Radio Shack.

~Jeffers

Re: hesitation after installing dyno jet kit and k&n
 

the guy who did this kit put the clip on the 5th ring and used the stock pilot 45 my plug was fouled on the rear cylinder also so ?

Re: hesitation after installing dyno jet kit and k&n
 

gas anyone had any performance enhancements with the resistor deal in the plug wire?

First I'll reply with "Don't remove the resistor in the plug wire!" It will do you no good. The resistor is there to reduce frequency radiated by the wires which interrupts some radio frequencies. Do you really want folks fu&king with their radios when you are riding around them? I think not.

Now, sorry for the temporary threadjack. Back to the jettting: I need to know if you have a Factory Jet Kit or a Dynojet Jet kit. I can help you out with either, but will give you a good baseline setup with the Factory kit.

Re: hesitation after installing dyno jet kit and k&n
 

it is a dyno jet jet kit fouth from the top and 190 front 195 rear i think

Re: hesitation after installing dyno jet kit and k&n
 

Well, crap. If the RLZ archives were available I could refer to an old post, but alas they are gone forever. :cry:

Okay, we'll do this the old fashioned way. Take the bike out for a spin. Pull the choke out just a bit while riding and see if the stumble goes away. This will tell us if you're rich or lean. If it gets better choked then you're lean. Try different amounts of choke.

Also, does it do it at low rpm w/light throttle?

Main jet sizes sound about right. I assume you have good top end power?

What are your mixture screw settings?

One more question: What exhaust are you running, and what is your elevation? Okay, that's two questions. :oops:

Re: hesitation after installing dyno jet kit and k&n
 

well i am running wileyco exhaust ,mixture screws are out exactly 2 1/2 turns out ,top end power is definately there ,low end light throttle is also there(also slight hunting idle ) but i have a problem with a stumble when coming off a idle to an open throttle if i blip throttle twice then i can pick up and go its like i am losing my throttle slides for that moment then they pick up ?
(am i making sense?)and i have a rich idle too (fuel smell)should i go to a 42 pilot instead of the stck 45?and i am in illinos (central )elavation i dont know
i am sorry i just have little probs to work out sorry if i am being a pest
if i get mine fixed right then i can fix my brothers too

Re: hesitation after installing dyno jet kit and k&n
 

Those needles should be raised all the way (Dynojet tapered needles that come with the kit with the clip on the last setting). You also might want to drop down to 185/190 mains. That's how I'm running it with a BMC filter and Jardine high mounts. A/F was so close to perfect on my dyno run the guy said not to touch it again.

Try the TPS mod as well.

Re: hesitation after installing dyno jet kit and k&n
 

This is good stuff as I'm about to go through the same thing with my bike. K&N should arrive any day then I'm gonna order the Dynojet kit

I don't recommend the Dynojet. It's more difficult to tune than Factory, and you have to drill the slides, which makes it harder to go back to stock.

Okay, back to the problem at hand...

The stumble is from the rich idle, same with the hunting idle. I suggest adjusting the mixture screws to 1.75 turns out and see how that works. Leave the pilot jets stock #45. Also, while you have the carbs off (because that's what it takes to adjust the mixture screws - they're "D" shaped BTW) go ahead and raise the needles so that the clip is in the middle (3rd) position. This will help make up for some of the loss of fuel around 2-3k from the idle screw adjustment.

Wiley Co are very free flowing pipes, but it's not a full system and doesn't warrant going to a #50 pilot. Also, the BMC has different flow characteristics than the K&N. The BMC is actually a little more restrictive, but not by much. I hear it's easier to tune the BMC.

Re: hesitation after installing dyno jet kit and k&n
 

allrighty then i will do that tonite and we will see how it works out i am getting real familiar with these carbs!lol\
what about the tps?ohms?5 or what?
i will get back tomm.

430-480 ohms. Some can't get that low without tearing the TPS open and bending the little tab over. If you do that, be VERY careful you don't break the thing. It's quite expensive. You can also take out the metal inserts in the elongated holes to give you more adjustment range.

Re: hesitation after installing dyno jet kit and k&n
 

the bike is out back together and i fired it up and it runs great
no more bad hesitation still a little bit but no backfire while decellerating
i am amazed what is idle supposed to be set at anyway?
1100 right?
it still hunts a little but i guess u have to let it get really warm huh?
thank you for all the info and i will get pics as soon as i figure out how to put them on!

Re: hesitation after installing dyno jet kit and k&n
 

I broke my TPS chiseling the bolt heads off. Plastic weld is still holding until I can justify the $70+ for my little screw-up.

Actually the hunting idle will get worse as the bike warms if it's running rich. If this happens, give the mixture screws another 1/4 turn in.

Re: hesitation after installing dyno jet kit and k&n
 

i got the needles on the third and the bike seems to rev up but actually backfire quite a bit and yes the hunting idle does get worse as it warms upso you say 1/4 turn in?
they are out now 1 3/4 out what now? and it also just dies sitting at an idle then almost seems like ti is hydro locked then clears out and restarts?????i am getting slightly frustrated but i guess that is what it takes to get a finely tuned machine

I think what's happening is you are fouling plugs really bad and that is causing your stalling. I would go in another 1/4 turn and raise your idle just a tad. By backfiring, do you mean through the exhaust or through the carbs? Try cleaning the plugs as well. Try this, start the bike, let it idle until it dies, then pull the plugs. I'll bet you a 6-pack they are black as coal. Do this before you adjust anything else.

i can hear a backfire slight thru the carbs and a lot thru the exhaust and i have brand new plugs in the bike after i did all adjustments

So when you pulled the plugs last time were they black?

Re: hesitation after installing dyno jet kit and k&n
 

Quote:

am sorry i just have little probs to work out sorry if i am being a pest
if i get mine fixed right then i can fix my brothers too

Hey man , thats what this place is for . Not to worry there .

Was the TPS the main problem ?

Re: hesitation after installing dyno jet kit and k&n
 

severely blck and fouled

Re: hesitation after installing dyno jet kit and k&n
 

i rode the bike today and the bike had a hell of a miss /stall when accelerating and when keeping the bike at 3000 to 3500 it cut out then when i put the choke out all the way it smoothed out .
that means i am lean right?
this is frustrating crap and was i supposed top put the needle up all the way or the third ring land?

Re: hesitation after installing dyno jet kit and k&n
 

Disregard, I thought you had it solved. DOh! :oops:

Re: hesitation after installing dyno jet kit and k&n
 

i wish i could so i can put on my one peice front section from sharkskinz!!!!!

Re: hesitation after installing dyno jet kit and k&n
 

00996rider ,

I would go back and make certain the rubber diaphrams are under the carb caps correctly and then check to see if the rubber seal ring between the carb and air box is wadded up and leaking air .

Sounds like the diaphram though .

To ease placing the cap on top of the carb and geting the O.D of the diaphram in proper position, use a finger to lift the slide a bit . That takes some of the stretch from the rubber .

Without putting any of the three screws in lay the cap on the carb and hold down . Look all the way around it and you should not see any of the diaphram holding the cap up .

EDIT :

While in there make sure there is a small washer on top of the needles c-clip and after reinstalling the needle holder there should be a large washer under the slide spring . It's used as a seat for the main spring . It will not cause your problem but it should be there .

Re: hesitation after installing dyno jet kit and k&n
 

nope all the diaphams are in place like they are supposed to be i have an issue with the needles what clip are they supposed to be on !some people say third some say all the way up ?any idea i think since i am running lean that i should put them all the way up so i get more fuel ?that is the way i works right?i do beleive this will take care of my problems!damn carb bike but i love them still !!!!

Re: hesitation after installing dyno jet kit and k&n
 

OK, I've been following this thread quite closely as I was having the same problem/condition; that of poor running at steady throttle or slow roll on in the the 2000-3500 rpm range. Basically engine would surge and sputter, carb spits, and sounded like it was running out of gas. Idle and ran great everywhere else. Custom fram filter/2bros hi-mounts. Condition is better with choke or with stock pipes.

First since it didn't cost anything, I did a carb sync and reset idle speed. Helped overall running/idling but didn't solve it. Next, I tried the tps/shim the needles mods (cost $1 or so for the washers). This helped much more but didn't eliminate the condition.

So, I broke down and ordered up a Dyno-jet kit ($$). After reading all the paperwork, I crawled into the carbs to find that my used 98 has all ready been dyno-jetted! Not only that, it's setup correct according to the instructions (180/185, needles on 4, 2&1/2 turns out). Ahh, crap. :evil:

Reading the troubleshooting section, it mentions altering the needle position "up". So I did, going from 4th to 3rd. Seemed a little better. Went from 3rd to 2nd, bike ran worse (still talking 2-3500 range). I was bummed about all this and then it dawned on me: I was going "down" numerically but "up" on the needle (DOH!). Instructions are meant numerically so I then went to the #5 position.

Bike runs like a perverbial top! Me very happy. :D

Re: hesitation after installing dyno jet kit and k&n
 

that is what i was going to do too
i finally broke down and called the dynojet people and they said to do the same thing 5th ring from top and that will solve my problem .
i sure hope so tho because i am fed up do you have the stumble when cracking the throttle to take off?that is the only problem i have yet to fix!!!!!

Re: hesitation after installing dyno jet kit and k&n
 

good news hawk riders i got it right
fifth needle two screws out on mixture and plugs are burning tan PERFECT!!!!!!all except i did a wheelie and i think the flaot stuck closed but will pull carbs one more time
i finally ordered my sharskinz front fairing and lower section also will post pics as soon as i figure out how