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oldmanjob
01-29-2009, 11:23 AM
The only if you call it an engine mod is a Big Suck Stage one, air intake (no re-jetting done but carb was re-adjusted). When my two into one was installed the shop put on all 12 disk's. After riding approx 300 miles on this setup, I would get a engine hesitation when down shifting into third gear, and when I rolled on in the same gear, the same hesitation I assumed that the bike was running too lean even though the plugs were a good color. . I then removed 3 disk's and have run 9 for the last 100 miles. I have found a power increase, but the third gear problem still exists, but less noticeable. The plugs still look good but just a tad darker.

I called customer relations (before I found this(orum) and the young lady suggested I drop it down to 8. So this morning I dropped it down one, cleaned the plugs, and will put 100 miles in this setup. Now the question is if this last adjustment doesn't solve the third geat problem should I re-jet and if so what size jet should I use?:confused:

jwells
01-29-2009, 12:21 PM
You can reduce the number of discs and try it, but you are not getting the full benefit of the pipe and the air intake you paid good money for.
You say it was not 'Re-Jetted' but it was 're-adjusted'
With the free flowing air cleaner and free flowing exhaust, it need more jetting changes, air/fuel screw will not do enough. I'm going to also guess that the problem exists in all gears, just most noticeable in 3rd? Carburetion does not know what gear your in and it doesn't care, if it's wrong it's wrong in every gear.
I would suggest looking into purchasing a dyno jet kit for the bike or the Screaming eagle jet kit (i think it's the same as/made by dyno-jet). You will use a bigger main as well as shimming up the needle and bigger pilot circuit. With that you should be albe to go back up to the proper number of discs.

oldmanjob
01-31-2009, 01:49 PM
The jet kit has been ordered, should be in Mon or Tues. Ran with 8 and it was awful. Went up to 10, and it runs much better. To pick your brain, when re-jetted what would be the best number of disk's to start off with?

jwells
02-02-2009, 07:36 AM
Start with 14-16 and go from there, be sure to use plenty of anti-seize on the bolt threads also.

oldmanjob
02-09-2009, 07:53 PM
Well the bike was re-jetted with a Keihin no hassle jetting kit. Followed the kits instructions and used a #45 slow jet, #165 main jet and a NOKH jet needle, and put on 16 disc's with a closed end cap. Mad dog (great name for a mechanic) took the bike out ran it through all gears and even a run at 80 MPH:eek: Bike ran smooth and the third gear miss was gone.

Picked up the bike this afternoon. Ran it on the interstate between 65-75 plenty of power and ran smooth. Then it was stop and go traffic and no problem there neither. Ran it on some twisties and had plenty of pull through the gears (I have changed the front sprocket from a 27 tooth to a 26 so my shift point comes a lot quicker than stock). With this solid mounted motor the vibration between 40-60 was annoying, but with this new setup the bike seems to run smoother. Will try to get another 100 miles on this setup and will report back in :D

oldmanjob
02-26-2009, 01:25 PM
After over 200 miles, the bike is running great with the new setup. After getting back from the bike show in Greenville S.C. Saturday, over 100 miles with a side trip through the watershed twisties, the plug's looked fine and averaged 50 MPG.

jwells
02-26-2009, 01:56 PM
sounds perfect, go ride and enjoy it.

kz550
02-27-2009, 01:02 AM
After over 200 miles, the bike is running great with the new setup. After getting back from the bike show in Greenville S.C. Saturday, over 100 miles with a side trip through the watershed twisties, the plug's looked fine and averaged 50 MPG.

I enjoyed reading your review. Like you, I too have to wipe the smile off my face after a ride. My Supertrapp equipped sport bike charges from as little as 3K RPM & pulls the wheel off the ground above 7K, all while getting 4 - 9% better fuel economy than before the Trapp. I belong to a Kawasaki forum where I hear riders incessantly talking about more power. Some achieve that goal at the expense of having a peaky bike with limited range, sometimes upwards of 40% less. :confused: Never do I hear any of them compensating for altitude.

I barely touched my jetting, fixing a known low RPM lean spot. The Supertrapp universal (http://forums.supertrapp.com/showthread.php?p=1632) does the rest. Swapping bikes with other riders for short stints is always a treat.
Give me my 9r back!!! http://www.zxforums.com/forums/images/smilies/evil6.gif

Enjoy your new bike!

~50MPG, 238+MPT, 5 gallon tank, base elevation 4,500', 899cc ZX-9r exhaust slip on (9 of 12 discs), pilot air screws adjusted, jet needle raised 0.5mm, main jets lowered two sizes, with more power than I'm skilled to control.

oldmanjob
03-20-2009, 07:20 AM
After a couple of hundred more miles, from the color of the plugs, the bike seems to be running on the rich side. Would it be a good idea to increase the disc's from 16 to 18 before messing around with carb adjusting:confused:

jwells
03-20-2009, 08:41 AM
Try adding two and see how it works. Keep in mind, probably better to be a little rich vs. lean?

oldmanjob
04-20-2009, 10:57 AM
Latest news is that I went on a poker run Saturday which was 103.5 miles from door to door. When I refilled the tank it took 1.65 gallons:eek: So the 883 Sporty with the carb re-jetting and 16 disc's averaged 62.72 MPG. :D Plus many inquires about the system.

hugger
04-21-2009, 08:35 AM
After a couple of hundred more miles, from the color of the plugs, the bike seems to be running on the rich side. Would it be a good idea to increase the disc's from 16 to 18 before messing around with carb adjusting:confused:

Now that you have the carb set do not go back into it. Do your tuning with the SuperTrapp the way it was intended. Like Jeff said be sure to use anti seize on the screws everytime you put them back in.

oldmanjob
04-21-2009, 12:10 PM
Thanks Hugger for the advice. After my last post
Latest news is that I went on a poker run Saturday which was 103.5 miles from door to door. When I refilled the tank it took 1.65 gallons So the 883 Sporty with the carb re-jetting and 16 disc's averaged 62.72 MPG. Plus many inquires about the system. I believe I will be leaving everything alone for a while:D

hugger
04-21-2009, 03:34 PM
After a couple of hundred more miles, from the color of the plugs, the bike seems to be running on the rich side. Would it be a good idea to increase the disc's from 16 to 18 before messing around with carb adjusting:confused:

At this point leave the carb alone and do your tuning with the SuperTrapp! Adding a couple of discs will lean it up a tad. If you get any popping when you roll off the throttle at speed then take one disc off. And go fo another test ride.

oldmanjob
05-25-2009, 09:17 AM
News about latest adventure. Just came back from a 3 day 800 mile round trip from Dana NC to the Barber Motorcycle Museum and Motorsports Park in Leeds Alabama. (Even did 4 laps around the track:D). With the #45 slow jet, #165 main jet and a NOKH jet needle, and 16 disc's with a closed end cap, the 883 averaged 61 MPG and this included Interstate, back roads, twisties, traffic, and the 340 mile stop only for gas ride home in the rain:eek: By the way the bright gold sparkling pipes are sure an attention getter.:D

kz550
05-25-2009, 05:15 PM
I hear you (http://forums.supertrapp.com/showthread.php?t=755). :cool: I've been on group rides for four weekends straight. As much as I love watching the other riders having to fill up over and over again, I don't like the wait or the views from gas stations. To me, it's about the riding, scenery, taking in small towns, and talking with the locals, not about hunting for gas stations and sweating in the heat while filling up the gas tank.