'99 1100, K&N Pods, FP 3.0, Muzzy full meg, High Altitude

[ubermoto]

Hey guys,

Will be installing the meg and factory pro 3.0 kit this coming weekend. I'm at about 5000 feet above sea level. Any tips on the main jets to start with would be greatly appreciated!

Cheers!

Jeremy

[Kermit Z]

Hi Jeremy, look forward to riding with you sometime I have an Ivan's jet kit so I cannot really help you as to Factory Pro. I do know that when I installed Ivans, he said to go down a size or two. It is still a little rich but better than being too lean.

[TGHW]

Send a PM to Wayne (GA Limited GM). He recently moved out there and had to rejet his 1100 for that altitude. He should be able to give you some baseline settings. There are also a bunch of other Rexers in CO that should be able to help you out.


TG

[ubermoto]

Thanks for the tips guys... Wayne sent me this link from when he was sorting through these issues not long ago:

http://www.zrxoa.org/forums/showthread.php?t=212220

Right now, I've got the 130 mains, needles 3rd clip from top, 38 pilot and fuel screw 2 turns out. Thinking I may need to drop to the 128 main before I start tinkering with anything else just to make sure the main isn't causing any of my trouble... But that didn't come with the kit. D'oh!

Cheers,

Jeremy

[hijqx]

Hey Jeremy,

I'm still running the stock pipe and airbox (so I really do not have a clue ) Mr. Kawasaki's recommends to reduce the pilot jet from a 35 to a 32 at high altitude (this is also for a stock setup, with the full exhaust it may not be necessary).

Or you could email Marc at FP and ask him for his opinion, he's usually very helpful.

[ubermoto]

Hey Jeremy,

[clip...]

Or you could email Marc at FP and ask him for his opinion, he's usually very helpful.

E-mailed Marc this morning. He replied within 30 minutes. He suggests starting with 125 mains with my set-up at 5000'.

Will swap 'em out in the next few weeks and report back on my status.

Cheers,

Jeremy

[ubermoto]

E-mailed Marc this morning. He replied within 30 minutes. He suggests starting with 125 mains with my set-up at 5000'.

Will swap 'em out in the next few weeks and report back on my status.

Cheers,

Jeremy

Seems like the 125s are still too rich. Smells like a drag strip... Will be installing 120s this weekend... Now if this dang snow will melt so I can get out and test it out! =)

Just out of curiosity, I called Ivan's and talked to a gal there who said that the 1100 and 1200 kits came with the same jets. The smallest jet in their pod kit is a 142 and that they recommend stepping down one size for the elevation gain (5000') to a 140. Seems way rich to me... Anybody out there at Elevation running Pods and Ivan's kit and know the main jet they ended up with?

Anybody???

Kermit???

[Kermit Z]

Seems like the 125s are still too rich. Smells like a drag strip... Will be installing 120s this weekend... Now if this dang snow will melt so I can get out and test it out! =)

Just out of curiosity, I called Ivan's and talked to a gal there who said that the 1100 and 1200 kits came with the same jets. The smallest jet in their pod kit is a 142 and that they recommend stepping down one size for the elevation gain (5000') to a 140. Seems way rich to me... Anybody out there at Elevation running Pods and Ivan's kit and know the main jet they ended up with?

Anybody???

Kermit???

Sorry, I was asleep here I have been running the 140's from Ivan with my pod's. It is still a little rich but runs very smooth Guess its better rich than lean

[ubermoto]

Sorry, I was asleep here I have been running the 140's from Ivan with my pod's. It is still a little rich but runs very smooth Guess its better rich than lean

No prob... Gosh, 140s sound really rich to me. Esp when GA Limited GM is running 128s and he has a hotter cam in addition to the pods and exhaust. Have you had your ZRX on a dyno w/gas analyzer?

Does anybody know if Ivan's using the stock Keihin jet sizes? I know Dynojets sizes don't match up with Keihin's, but it seems like the DJ jet size was a lower number than the corresponding Keihin size... At least according to this: jet chart

Hold on a sec... If GA Limited GMs jets were 128 DJ size, then they correspond to Keihin size 137.5? Now I'm really confused! Could I be going the wrong way??? DavidABQ is also running DJ 128s with pods and pipe.

I'm just about ready to give up... Maybe I just need to save up the cash and take it to a Dyno tuner...

[Kermit Z]

128 = 137.5, sounds about right to me. It appears that would a step down from 140. I have not had my bike sniffed so I cannot really confirm its too rich, but looking at the plugs, its close.

[hijqx]

Hey Ubermoto,

I just installed my Kerker Megaphone and I will be installing (hopefully this weekend) a FP 3.0 kit. I was told to install the 135/138's.

Did you ever get the jets sorted out?

[ubermoto]

I'm not quite done yet, but my current settings are 135 mains, needles on the top clip, stock pilot (35) and fuel screw 1.25 turns out. My tuning was getting thwarted by high float levels. I kept smelling raw fuel, so I kept switching to smaller jets. Unfortunately, the raw fuel was from the high fuel level in the bowls, so I recommend double checking that before you do anything else. Don't trust your reading with the float bowls removed! My float height was right at 18.5mm so I thought I was good, but the fuel level was more than 2mm high! The only way to check it is with the carbs on the bike and a clear length of tubing attached to the bowl drain. Check out this post: Float height and bowl contents

I think I'll end up with 135s or 138s. I'm gonna take it in for one more dyno run when I think I have it dialed (It needs to actually warm up around here!!!). Will post that here: Post-dyno jetting advice

FYI - The FP 3.0 kit that I got had 130s, 132s & 135s. Factory Pro will swap 'em out as long as they haven't been used. Or you can get a set of 4 keihin round jets from cheapcycleparts.com for $9. Z1enterprises.com has em for $1.5/jet, but they don't carry the half sizes.

Good luck! Post up your settings when you have it dialed in!

Cheers,

Jeremy

[hijqx]

All good to know. Thank you.

Marc at Factory Pro suggested setting the floats @ 18mm. Are you lower than that?
My kit only has (2)135's and (2)138's.... I guess I will be starting there. Any idea if I need to put the smaller jets in the middle(#2,#3) or on the outside(#1,#4)?

[ubermoto]

Well, I was under the impression that you may want to use different size jets on the inner/outer carbs only if you still had the stock airbox. The reason being that the amount of airflow through the box/filter and then into the outer and inner carbs was slightly different. That's just what I've heard. Also read something about the two inner cylinders getting hotter than the outers so the inners could burn a leaner mixture and the outers needed a richer mixture. Again, just hearsay. Seems like people argued back/forth on that because your temps should be pretty uniform in a liquid cooled engine. But you said you were installing the 3.0 kit though, right? You runnin' pods? All that to say, I'm not sure which ones you should get the bigger jets. Based on the cylinder temp theory though, it should be the outer (1/4) carbs.

I have pods and I've installed the same size main all the way across.

But it looks from your profile pic that you have a 1200 though, so I guess we're not comparing apples-to-apples since mine is an 1100.

I think my float height ended up being around 17.5mm, but I didn't really keep track of that, and it seemed like each carb was slightly different. I was more focused on how the fuel level ended up. It's a real pain in the arse cuz you gotta rig up a stand for your carbs and have an auxiliary fuel tank to check the level. If somethin' is outta whack, drain the bowls, remove 'em, try to bend the tab a smidge, x4 for each carb, reassemble, mount back to the stand, hook the aux fuel tank up again, yada yada yada... Took me about 4 hours to get 'em just right.

[hijqx]

I finally got her setup with the FP 3.0.

Here are my settings:

Pilot Jet: 35 (stock)
Needles: 3rd from the top
Outer (#1, #4) Main Jets: 138
Inner (#2,#3) Main Jets: 135
Mixture: 2 turns
Floats: 18mm (stock)

Feels pretty darn good. It pops a little on deceleration.

Mission accomplished

[TGHW]

I finally got her setup with the FP 3.0.

Here are my settings:

Pilot Jet: 35 (stock)
Needles: 3rd from the top
Outer (#1, #4) Main Jets: 138
Inner (#2,#3) Main Jets: 135
Mixture: 2 turns
Floats: 18mm (stock)

Feels pretty darn good. It pops a little on deceleration.

Mission accomplished

You don't need, nor does DJ recommend staggered main jets. I'm sure that you could get it dialed in that way but it is not necessary and just makes tuning more difficult.


TG

[kevh]

I finally got her setup with the FP 3.0.

Here are my settings:

Pilot Jet: 35 (stock)
Needles: 3rd from the top
Outer (#1, #4) Main Jets: 138
Inner (#2,#3) Main Jets: 135
Mixture: 2 turns
Floats: 18mm (stock)

Feels pretty darn good. It pops a little on deceleration.

Mission accomplished

wow...you mean we dont get to bust yer balls for risding a sewing machine anymore? lol

the popping is due in large part to the pipe. you will be hard pressed to get rid of it completely. adjusting the mixture screws helped decrease the popping on mine

[hijqx]

You don't need, nor does DJ recommend staggered main jets. I'm sure that you could get it dialed in that way but it is not necessary and just makes tuning more difficult.


TG

Yeah I was wonder about that voodoo. I did the hot/cold test and it pulls harder cold, so I want to drop the mains to 132 across all 4. My only concern is that I currently don't have any flat spots so I am hesitant to mess with it.

wow...you mean we dont get to bust yer balls for risding a sewing machine anymore? lol

the popping is due in large part to the pipe. you will be hard pressed to get rid of it completely. adjusting the mixture screws helped decrease the popping on mine

NO SIR! Now'll you're going to want to ride in front of me to avoid the Kerker rumble. I don't mind the popping and I understand it won't hurt the motor, but I will adjust the mixture a little more. I just want to get the main jets setup right first.

What are you running Kev? Should I try going down to 130's?

[kevh]

Yeah I was wonder about that voodoo. I did the hot/cold test and it pulls harder cold, so I want to drop the mains to 132 across all 4. My only concern is that I currently don't have any flat spots so I am hesitant to mess with it.



NO SIR! Now'll you're going to want to ride in front of me to avoid the Kerker rumble. I don't mind the popping and I understand it won't hurt the motor, but I will adjust the mixture a little more. I just want to get the main jets setup right first.

What are you running Kev? Should I try going down to 130's?

you cant go by my setup since i insisted on keeping the air box.

[hijqx]

you cant go by my setup since i insisted on keeping the air box.

Doh!! Is there a reason you like to wrestly with the airbox?

[ubermoto]

Doh!! Is there a reason you like to wrestly with the airbox?

Kev is just a glutton for punishment...

FWIW, I personally think you'd be too lean with 130s. Ivan's kit comes with 142s, The DJ stage 3 kit comes with 128s (DJ sizes) which converts to 138s. Everybody I've talked to says to drop a size or two at 5000' elevation, so you should be close with your current setup. BTW - I'm curious if you came up with a 'scientific' way to tell if your bike was pulling harder when cold vs. warm. I guess my butt dyno just isn't as calibrated as most.

My local Kaw dealer (MotoAdventure in Loveland) will run my bike through 3 dyno runs for $50 which includes hp, torque & A/F. They said the main expense is time to strap it in which is really easy for the ZRX since there's nothing in the way of the frame.

Cheers,

Jeremy

[hijqx]

Kev is just a glutton for punishment...

....Jeremy

I guess so....

Yeah I am actually pretty happy with the feel of it. No flat spots and plenty of power. It just sounds out of tune. I know she needs a value adjustment and carb sync....its on the list.

As far as the hot/cold test, I can feel that it pulls just a little stronger right when I take her out (the front wheel picks up a little easier too when its cold ). I'm sure the neighbors love my 7500-10000 RPM runs in first gear at 7am

I may either try 135 across all four or try the 132/135 voodoo.

Faster Motorsports up here in Denver will do 3 pulls for $45, so I will give that a stab a bit later.

[kevh]

Kev is just a glutton for punishment...

My local Kaw dealer (MotoAdventure in Loveland) will run my bike through 3 dyno runs for $50 which includes hp, torque & A/F. They said the main expense is time to strap it in which is really easy for the ZRX since there's nothing in the way of the frame.

that's a good price...i may have to make my way up there sometime

the airbox has been good to me and once you have pulled the carbs a couple times, you learn the tricks to getting them in/out easily

if you include the time we spent trying to get the pods to stay on, it took longer to rejet wayne's 1100 with pods than it takes to do mine