Micron system jetting

There seems to be more and more members appearing that are racing the ZXR400 so i've created a special section just for you to show off results, discuss meets etc etc.

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ChowderV4
Posts: 98
Joined: Mon Dec 24, 2012 7:57 pm
My Bike: Zxr400L racer

Micron system jetting

Post by ChowderV4 »

I've had a few searches and came up with between 100-105 main jets and a decent race filter will give good results, only issue is i cant find anywhere to buy the jets, only place i saw was on wemoto but they went up in incriments of 5mm so i can either get 1.00mm or 1.05mm, here's the page for reference.
http://www.wemoto.com/bikes/kawasaki/zx ... _main_jet/

Is that right or am i missing somewhere i can get them?

for the record ive just got a full micron system and can.
Deswilkie
Posts: 127
Joined: Fri May 08, 2009 2:11 pm
My Bike: ZXR400L, Trumpet 675

Re: Micron system jetting

Post by Deswilkie »

Minuki, Kehin and Dynojet jets have different diameter sizes. So a 100 in one isn't the same size as a 100 in another. If you have an engine tuner close by (or at least one with a dyno) they should hopefully keep a stock and it's definitely worth a dyno run to ensure you have stuck on the right size. When I ran a micron I think it was 112.5 kehins I ran (but that was with no air filter).
ChowderV4
Posts: 98
Joined: Mon Dec 24, 2012 7:57 pm
My Bike: Zxr400L racer

Re: Micron system jetting

Post by ChowderV4 »

Deswilkie wrote:Minuki, Kehin and Dynojet jets have different diameter sizes. So a 100 in one isn't the same size as a 100 in another. If you have an engine tuner close by (or at least one with a dyno) they should hopefully keep a stock and it's definitely worth a dyno run to ensure you have stuck on the right size. When I ran a micron I think it was 112.5 kehins I ran (but that was with no air filter).
I was assuming those on wemoto were standard kehin jets as i dont want to mess about with dynojet stuff, only thing i was a little confused about was the unit it was measured in.

they state sizes 1.00mm and 1.05mm am i right in saying that they are #100 and #105 size jet as they would be stated in the manuals ie. standard size is #95 so would that be 0.95mm
Deswilkie
Posts: 127
Joined: Fri May 08, 2009 2:11 pm
My Bike: ZXR400L, Trumpet 675

Re: Micron system jetting

Post by Deswilkie »

Have a wee look on http://www.jetsrus.com/FAQs/FAQ_mikuni_ ... _sizes.htm for a comparison.
ChowderV4
Posts: 98
Joined: Mon Dec 24, 2012 7:57 pm
My Bike: Zxr400L racer

Re: Micron system jetting

Post by ChowderV4 »

Yeh i see that.
So where does everyone get their jets from and what sorta price are you paying
BENJ
Posts: 8
Joined: Wed Feb 24, 2010 11:08 pm
My Bike: Yamaha R1
Location: Basingstoke

Re: Micron system jetting

Post by BENJ »

You should not be guessing your size of jetting. This will only lead to problems.
The only way for sure is to run it on a dyno and get the exhaust gases analyzed.
H2 Race Bike
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ChowderV4
Posts: 98
Joined: Mon Dec 24, 2012 7:57 pm
My Bike: Zxr400L racer

Re: Micron system jetting

Post by ChowderV4 »

yeah i know that, i was going to go for a base setting that i've read is used a lot with full systems and filters then see how it goes, then dyno, adjust and perfect.
Found that honda and zxr main jets are the same, i've got a set of 110 jets, but will order a set of 102 and 105 jets and see how it goes.
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