carbs jetting issue video colortune

[DGXSER]

For a single cylinder with no spark, typically I would suggest swapping the plug wires from #1 and #4 and see if the no spark moves or not. If it does not, then the plug is done. If it moves, then you need to look at the plug cap, check it for resistance, stock ones should give 5k ohm resistance. After that, check resistance from one wire to the other, through the coil. Should be about 15k ohms.

I had a coil on a fellow XSives bike would read fine on resistance, had a horrible miss at low RPM, very sporadic spark at low RPM. We replaced the coils and it ran like a scalded dog.

[DELL82]

Didn't think about this. Will try this weekend, Thanks

[le_bucheron]

I took out the coils to did a check up. The primary it's 3ohm and secondary 13.5k ohm (remember it's a Xj) so it's suppose to be 2.5 and 15k ohm.

I have cuted a small piece of each wires to refresh the end. After I put all the stuff back on the bike, I had spark on # 4

[le_bucheron]

I'm back with my xj project. I past the winter to work on the electric harness. After that I push the xj in back of the garage to give some love at my fz1. I never take the time to make my xj run great since I jetting it... Time is coming to get this **** done!

My actualy set-up from dynojet

124 main jet
50 pilot jet
190 air jet
E-clip step 2

My oem set-up is suppose to be:

112.5 main jet
47.5 pilot jet
140 air jet

When i bought the bike (cheap 4-1 exhaust stock air box) I never drove the bike with this set-up.

115 main
47.5 pilot
140 air

Dynojet suggest to use (stage 3)

138 main
50 pilot
190 air

What I read on the forum

122.5 main (4-2 custom exhaust + pods)
50 pilot

My old pilot jet was no-bleeded and my new one is bleeded. Does it care?

Last time I colortuned ive got 1/2 turn on the screw...

Now the idle is good.
Throttle 1/8-1/4 = rough
Throttle 1/4 and more = top shape, aggresive, funny!

So what you suggest for the "plan A"?
I read something about throttle valve... does it mean the e-clip?
I never tried to go back with the stock jet because the old one are in bad condition...

Thank you!

[TopCatGr58]

Hey there,

Dynojet jets are totally different than OEM so you can't compare them.

Pilot jets with or without side holes doesn't make a difference, but the wrong sizes can, but again, you have Dynojet jets there so we can't tell whether it's too large or too small.

I don't have or use a colortune. The XJ has the YICS, so do you have the YICS Eliminator installed? You haven't mentioned vac. synching the carbs?

After the bike is warmed up, you can try pulling the choke/enrichener out a little and see if that makes the 1/8-1/4 throttle better or worse. IF better, then you're too lean and you need a little more turn out on the pilot screw. IF worse, then you're pilot jet may possibly be too big/too rich, but you're only at 1/2 turn out from gentle seating...I assume, so not much room for adjustment, but you can try.

ALSO, bike has possibly sat for a while, if for several months with Ethanol in it, then the carbs probably need to be cleaned first!

T.C.

[le_bucheron]

Since I jetting, i don't have to use the choke. The bike start by itself. Yeap i sync the carbs and elimineted the yics. I ran the bike last week about 30min and went I stop at the light I need to fight a little bite to keep the idle. I will put the carbs back in holes and try the choke trick!

Thank you

[le_bucheron]

Last summer I did the big job of carbs cleaning and the carbs was dry all winter long so I don't thing it's a cleaning case.

[TopCatGr58]

Since I jetting, i don't have to use the choke. The bike start by itself. Yeap i sync the carbs and elimineted the yics. I ran the bike last week about 30min and went I stop at the light I need to fight a little bite to keep the idle. I will put the carbs back in holes and try the choke trick!

Thank you

Well, not having to use the Choke when cold is a strong sign that it's a bit too rich! What do you have the idle speed set to? Although folks described being able to idle at fairly low ~800 rpm or so, stock is supposed to be closer to 1000 to 1100. The Idle will usually be higher as it warms up, because it can run on less fuel when warmed, so you may need to both adjust the pilot jet screw a little more leaner, but you may also need to set the main idle screw to a little higher rpm once it's warmed up!?

T.C.

[motoman]

Bowl feul levels will also affect a rich/lean cond. 81's thru XJ's fuel levels are checked while running, bike PERFECTLY level.

[le_bucheron]

Yeah the bike are too rich. I did colortune again and lean it a little bite. When I twist the throttle at 1/8 (critic spot) and I pull the choke, the bike dies... Here a video to give you a idea of my situation but it's not like when I ride the bike.

http://youtu.be/bpr2hZQd--E

When I ride the bike at 1/8 to 1/4 throttle I have some back fire. And after that point the bike run great. When I release the throttle for stop, I have to fight to keep the engine running.

I don't know which way I have to take first.

A- pull up one step the e-clip on the needle
B- reduce the pilot jet to 47.5
C- take out the dynojet stuff and restart with mikuni jets.
D- something else...

Thanks motoman. Next time I will put the bike level.

[TopCatGr58]

Hey there Le-Bucheron,

What confused me a little was your statement about the E clip for the slide needle, the Xj's didn't have adjustable needles, but then I realized that you got an adjustable needle with the DynoJet kit.

I'm also assuming that the PILOT jet is also a DynoJet and not a Mikuni?

But with only 1/4 to 1/2 turn out from seated, and your testing results, the 50 in there now does seem too rich, so trying the 47.5 sounds like a good thing to try.

Remember, they say to only change one thing at a time, so don't change anything else, like vac. slide needle position, just the pilot jet, and see what happens and adjust from there.

T.C.

[bikerphil]

I haven't read the whole thread, but if you have the stage 3 kit in there, it will always be too rich, try using the stage 1.

[le_bucheron]

I will receive my pilot jets wednesday. So I will give you some feedback soon.

[le_bucheron]

I haven't read the whole thread, but if you have the stage 3 kit in there, it will always be too rich, try using the stage 1.

Yeah I used the stage 1 main jets! The stage 3 look like very big.

[le_bucheron]

The pilot oem size help alot! I did sync and colortune. Seems run greet. I didn't try to ride it because I was short of battery...

I don't know if I have a electrical leak because my balistic battery goes down every time I tune the bike. And I add a car battery over my balistic...

Maybe my rectifier need a upgrade?