Hey all. Just wanted to offer my feedback. I just rode my bike after installing the 55 leak jet. Fuel screw at 2 turns out. Riding at sea level at 22 degrees C.

I didn't notice any difference from before. The bike still lagged or stalled if I opened her wide off idle. Still burbled on deceleration. It just felt normal. I didn't feel any new super power. What am I meant to notice?

Not that I'm criticizing, there was nothing wrong with the bike to start with, it kicks a$$.
:ride:

Mine Did The Same Deal On '08. Did The Full Ap Mod With Stock Leak And Bike Completely Rips W/no Bog.

adjust that fuel screw, 2 turns didnt help my bike out any. I messed with it until I found where it felt best. Definitely try other settings of the screw, and if you want to try that AP mod, go for it.

Mine never really bogged. It only stalls if I go wide open while it's just chugging along at idle speeds. Which is not surprising given the nature of the bike (light flywheel etc).

Emerica5 said:

How many turns out is your fuel screw now?

1 1/2- 1 3/4 has worked nicely for me, 2 made my bike sluggish and bog. Before I rejetted it, my bike bogged a lot when sitting on the stand (not just because it had been started minutes earlier) and now it is crisp and on point. After I readjusted my fuel screw at the turns I typed above, I noticed the difference.. Try all sorts of settings and see whats best for you

You need to read previous posts on how to set the fuel screw. In fact a while ago I wrote up the proper technique for doing so.

This combined with the 55 will make help clean up the quick squirt coming out of a corner. For the silver bullet, you may need to do the full AP Mod.

I found that the 55, proper fuel scre setting works really well.

thats the whole point of it being a fuel ADJUSTER screw 2 turns is only a starting point

here you go man: http://www.thumperta...ad.php?t=467595

Duely Bookmarked. Thanks heaps guys.

I'm pretty sure mine would stall, snapping from idle to full throttle on the stand. But I don't ride that way and I sometimes wonder if people are trying to tune for an unrealistic condition. You might clear that freewheel bog with an AP mod, but you're probably overfueling to do it and loosing power while that fuel clears out. I'm unconvinced it will translate into better lap times, just my opinion. :excuseme:

i agree with kevin whats the point in tuning a bike on the stand every one rides differently and conditions are almost never the same so if all you do with your bike is sit in the garage revving it then by all means tune it for that i too am not sure about the ap mod, as we all know bogging and hesitation is a real pain especially as i just swapped from a 2 stroker but the ap mod seems a little extreme i mean if this is the perfect fix why hasnt kawasaki already made it permanent where as jetting is an interchangeable mod then surely thats the correct way to go now dont get me wrong im not nocking it i may even have tried it but only if i had no joy with jetting

also a point to remember is while in neutral the bike will not perform (rev) as it will in gear, this is due to the neutral sensor these bikes have which alters the map so to not rev out as much when neutral is accidentally selected

A lot of people swear by those AP mods (mostly on other brands it seems) but we've been really happy with the way our bikes perform, grabbing holeshots and winning races without it. For me, if it ain't broke, don't fix it. Just use the 55 leak jet and if it really boggs, in real world conditions, check your accelerator pump adjustment. I honestly don't see the bikes with AP mods and aftermarket accelerator pump covers running better than ours. In fact, those seem to be the people we see complaining about jetting issues most often. :ride:

A 55 leak jet is fine but I also installed a 45 pilot jet and that seemed to be the best combo. Some have gone with the 48 pilot jet and had good results too. I added a Boysen Quickshot but haven't really noticed any difference while using it. Other than a PC fuel screw, that's all I've done to my carb and it runs excellent.

I bought my 07 last Oct. I've been running the 55 leak jet and 45 pilot jet. I believe I got the 45 pilot jet recomendation from BrittB. The bike ran fine. This Summer the bike started to bog again so I went back to the 42 pilot and things were great again. Now that it is going to start getting cooler again here in Texas, for the Winter I'll probably go back to the 45 pilot jet.

try to richen up the needle by one clip position.mine responded well to this.

I ride an 06 other than a k@n filter and leo vince full ti exhaust it is stock engine wise. I have never adjusted the fuel screw or touched the jetting-on rare slow corners if i am trying to pull third and it is real tight and i lose momentum and crack the throttle wide open from idle with no clutch it has poped and stalled on me. I cured this with either a little clutch action or grabing 2nd- but 2nd on an 06 revs out real fast and you get alot of wheel spin. Are you guys recomending the 55 leak jet on the 06 also? My plug always looks good on inspection. The more i think about it i should just leave well enough alone, This bike holeshoted my last race and totally walked on everything outthere. But if it could be better that would be great. What are some tell tale signs the fuel screw should be adjusted? I may get a little more pop under decell when i am engine braking in 100 deg plus days. I guess in the winter months you would generally want to richen it up? That would be turning the screw out right? on an 06 is it an allen head needed to adjust it, I keep saying i am going to get a mirror so i can look at it without taking the card loose and the manual just says special tool part #etc.etc required for adjustment. Thanks for the info.

Just curious, Ive read a couple posts that said not to do the ap mod and the 55 leak jet together?

I have a boyesen quickshot and a pro circuit t-4 pipe, I plan on doing the ap mod, is it also recommended to do a 55 leak jet? pro circuit recommends a 70. I currently have no bog, but it just feels like there should be more crisp power especially mid throttle.

Pro circuit recommends a 55. 70 is stock. If you have no bog then you do not need the ap mod. This does not help power at any rpm, all it does is prevent the bog. If you do it then you should start with stock leak jet and tune from there. I did the mod and it works best for me with a 65 lj or 70 when its real hot. One thing to consider for all the nay sayers, hondas come stock with the linkage o'ringed and all factory teams do it. For the guys who say it will not decrease lap times you're probably right. It's the time your bike stalls from a bog during a race that will increase that particular lap time. If your bike runs fine without it and you are happy then by all means run it. For those of you who are in search of instant throttle responce then go for it. I did, and i have not seen any bad side effects. My jetting is stock and my bike rips. Awesome low end strong mid and never ending top end. All that and instant throttle responce and no bog, ever!!