Quote from: FD3SHere is a link to those pics I took.

http://rx7.voodoobox.net/images/jets/

And thanks for the pictures.

OS

QuoteFirst, here is the definite info on the jets:

The pilot is a N224.103 type
The mains (both) are N102.221

I have a V&H SS Full Exhaust, stock intake box w/OEM filter, stock timing.

I used a #20 pilot (part # 004.564 from Sudco), #62.5 mid-main (004-270), and 132.5 main (004.298). I also got a 137.5 (004.300) that I may try later. The mains were $3 each and the pilots were #4.75 each.

I've got a stock intake and stock exhaust on my 2001. How would that change which jets I would want to choose?

i will place order for the jets today.

I got my K&N filter, my Jardine Exhaust (courtesy of Linh) is on its way - should be here tommorow.

I just need to get the jets and then do teh actual rejetting on it.

Resurrecting this thread instead of posting a new question.  I will be rejetting for a lunchbox and stock exhaust on my 2001.  From the matrix on the wiki, there are two people using a K&N filter and stock exhaust (come on, there must be more of you):

K&N(s) 20/62.5/137
K&N(p) 20/??/142.5

stock setup is 17.5/60/127.5, right?

I was just thinking about this from a math standpoint (I read somewhere that Mikuni jets are rated by fuel delivery rate and not diameter):

17.5 to 20 is 14% more fuel
60 to 62.5 is 4% more fuel
127.5 to 140 is 10% more fuel

Do those numbers make sense or mean anything?  I'm just curious... wondering if there's a reason the change is not linear.


Anywho, I think I'll go with 20/62.5/140 and see how it works, unless someone has anything to add that hasn't been included in the wiki jetting matrix.  Anyone stop me before I hit the "Order" button?  Or suggest any extras I should buy should things require it.  (I thought maybe a 65/67.5 mid, or 142.5/145 pilot which I seem to recall worked for some folks.)

I'm too lazy to change the exhaust (and I like the quiet), so I'm only trying to ease out some of the cold-blooded-ness.


While I'm blabbing, here's a guy that says actual flow rates compared to their ratings are really sloppy:
http://rd500lc.free.fr/technics/jet_size_en.htm

Umm... discuss?

Are the 04-06 carbs different?  I know the factory jetting was a bit different, but I think the carbs are otherwise the same.

I ran 22.5/65/137.5 with my Lunchbox and stock exhaust.  Honestly...I think it was on the lean side.

The lunchbox increases airflow a large amount.  You're going to want to bump the fuel more than just one step on all of the circuits.

I was also running 3 turns out on the mixture screws.

If you run the jets you were thinking about running with the lunchbox, you will make the bike run even worse in the cold.  It will be way lean.

Best of luck,

-Turd.

Good data point.  Was it lean all over, or just in a certain range?

I don't know about 01/04 differences.

C4

I'm going to get Alpha to chime in here, he had the same jetting as me with just a Lunchbox and he had it dyno-tuned.  I think he'll have better insight than me on this issue...

-Turd.

When I had my bike dynoed, I was running 22.5/62.5/135, I belive, and it was too lean for my tastes. I bumped it up to 22.5/65/137.5 and it is still just a tad lean, but not too bad. I think I could bump it up to a 140 and be perfectly happy, but I have not noticed any surging or bogging down on the upper end, and it pulls quite strongly (for a 500).

I don't have a scanner, so I'll take a picture of my dyno run and post it up here some time. It was lean all over, but only by a point or so. I figured the changes I made to my jetting were enough to correct the lean conditions, but another size up on the main jet won't hurt it I think.

The '01 and '04 carbs are pretty much the same, I believe. The '04 just added the TPS (Throttle Position Sensor) and a few other minor changes, I believe. However, they are pretty much exactly alike. The TPS was simply for emissions reasons, no doubt.

Quote from: Wrecent_Wryder on October 27, 2006, 04:34:44 PM
Couldn't be more pleased with the running performance, though it takes a little more choke than I thought it would below 50 F. I might have gotten the same using a 145 main, but it's done so well I've been hesitant to touch it.

The necessity of choke is dictated by the pilot screw and air fuel screw. The main jet has no influence over that, as it comes into operation at roughly 7000RPM.

 05' GS500F
Stock exhaust
K&N  stock type filter
20 pilot
65 mid
137 main
3 mm washers
3 turns on mixture
I'm at sea level and find this set up work's great for me.

[87

Hmm.. maybe I'll try 22.5/65/140 then?

[7

I'm shooting for lunchbox and stock exhaust.  I'm just looking for a selection of jets to start with, and if I'm not happy I'll buy more.  Given where I'm at now, I have to get the thing to not run like poop in a stock setup.  (It's a 2001 engine that's been sitting for 3 years.)  I took the carbs apart and did a really crappy cleanup and got the thing running. 

I'll probably buy 20, 22.5, 62.5, 65, 135, 137.5 and 140 or something like that and go with what works.

7j7