FZRSupport: the FZROnline Archive

Ok my setup is a 05 R6 header, yoshi slip, and KN drop in. FZR600.

Has anyone ever done the poor mans jetting with these 600s? With the washers and main jets?

If so let me know, or link me or something. THX!

yoshi slip on or full exhaust?

A stage one kit will be fine with a K&N and a slip on. A good synch and she'll run good.

I run DJ Stage 1 with DJ118 mains (Mikuni's 110s), a K&N drop-in and a full Micron system. She screams like a banshee!

Brandon

fzrbrandon wrote:I run DJ Stage 1 with DJ118 mains (Mikuni's 110s), a K&N drop-in and a full Micron system. She screams like a banshee!

Brandon

Guys,
There is a wiki section on working jet set ups please add your setups to it that way in the future it will be easy to pick and n mix jet settings

yamaha_george wrote:

fzrbrandon wrote:I run DJ Stage 1 with DJ118 mains (Mikuni's 110s), a K&N drop-in and a full Micron system. She screams like a banshee!

Brandon

Guys,
There is a wiki section on working jet set ups please add your setups to it that way in the future it will be easy to pick and n mix jet settings

Hi George,

Possible stupid question - Where exactly can I put this info? I checked the carb Wiki and I don't see where I can put it. Sorry.

Brandon

Brandon,
Sorry Mate put that down to a " senior moment" I had done a rough out on my web site:-


http://www.saltmine.org.uk/fzr/fzr-carb-settings.html

And then had trouble making the same neat look on the WIKI so use my link as reference while I put a link on the WIKI and try again at a decent table that can be edited.
'pologies Geo.

I cannot stress enough that the more of you that list your settings the better & easier it will make it for everyone else (may be even you) in the future !!!

Not a problem George! Maybe it might be easier for you to put in my specs? If so, here they are:

Main Jet DJ118 (equivalent to Mikuni 110s)
Pilot Jet ? (stock)
Start Jet 52.5 (stock)
Float height 24mm
Clip position 5 of 6 (DynoJet needles)
Air screws 3 turns out
Air filter type K&N w/ airbox
Headers Micron
Exhaust Can Micron
Elevation in feet 267 ft. (North Hollywood, CA)

Notes: She usually starts within a second or two of hitting the starter button with full choke and goes right to about 1000rpm. After a couple minutes she'll wind up to about 3000rpm. From there, I'll let her sit for another minute or so then close the choke at which point she'll drop right down to idle (which is set at right about 1200rpm).

Hope this helps!

Thanks a bunch!

Brandon

fzrbrandon wrote:Not a problem George! Maybe it might be easier for you to put in my specs? If so, here they are:



Notes: She usually starts within a second or two of hitting the starter button with full choke and goes right to about 1000rpm. After a couple minutes she'll wind up to about 3000rpm. From there, I'll let her sit for another minute or so then close the choke at which point she'll drop right down to idle (which is set at right about 1200rpm).

Hope this helps!

Thanks a bunch!

Brandon

Brandon,
Your settings have been added to the website (I cannot believe that NONE of you spotted that the table was missing the MAIN JET settings .
All working now & PDF download updated as well.

Thanks Y-G

yamaha_george wrote:

fzrbrandon wrote:Not a problem George! Maybe it might be easier for you to put in my specs? If so, here they are:



Notes: She usually starts within a second or two of hitting the starter button with full choke and goes right to about 1000rpm. After a couple minutes she'll wind up to about 3000rpm. From there, I'll let her sit for another minute or so then close the choke at which point she'll drop right down to idle (which is set at right about 1200rpm).

Hope this helps!

Thanks a bunch!

Brandon

Brandon,
Your settings have been added to the website (I cannot believe that NONE of you spotted that the table was missing the MAIN JET settings .
All working now & PDF download updated as well.

Thanks Y-G

Hi George,

Yeah, I actually DID notice that it was missing albeit after the fact. That's why my post was edited (to go back in and add it ). I was like, "Wait a minute! Something's missing here!" Anyway, thanks again for adding it to the table. I appreciate it !

Brandon

top this for new question

tampaFZR600 wrote:top this for new question

And the answer is ......................

yamaha_george wrote:

tampaFZR600 wrote:top this for new question

And the answer is ......................

what???

Ok my setup is a 05 R6 header, yoshi slip, and KN drop in. FZR600.

Has anyone ever done the poor mans jetting with these 600s? With the washers and main jets?

If so let me know, or link me or something. THX!

tampaFZR600 wrote:

yamaha_george wrote:

tampaFZR600 wrote:top this for new question

And the answer is ......................

what???

Ok my setup is a 05 R6 header, yoshi slip, and KN drop in. FZR600.

Has anyone ever done the poor mans jetting with these 600s? With the washers and main jets?

If so let me know, or link me or something. THX!

TFZR,
that mail did not pose a question so there was no answer, if you want to get your original post back in the new posts we just add "BUMP" to the mail body and it will go back in the new stuff.

No worries you original question about your set up is actually irrelevent, to atuner what arrives in front of him is an engine that is not making full power pure and simple exhausts etc are meaningless (unless 2 stroke engine)

Presumably the engine stumbles or has flat spot somewhere in the rev range and that you do not like

saying it stumbles at such and such RPM is actually fairly meaningless for the purposes of diagnostics. so we need aproceedure to tell us what is actually going on with the engine in relation to the jets in the carbs

Put a piece of duct / masking tape on the RH switch, then wrap a complete revolution of tape round the throttle rubber cover.
Mark aline on the switch tape along the axis of the handlebar, continue the line onto the tape circle. Now open the throttle to WFO and mark the circle again inline with the tape on the switch.Then by eye ( compasses or divider are better ) mark the half way point
between the two throttle body lines then divide the two equal spaces in half again. Divide these 4 spaces in half again but in another colour ink.

Take the bike for aride and see what line on the throttle lines up with the switch line as the bike hits stumble and where the stumble disappears.

Look up in the Mikuni book what jets are affected by your two reference points ie start of stumble & end of stumble and you will know what jets to go play with .

this trick was shown to a newbie years ago by Kel Curruthers I figure if it was good enough for Kel I will go along with it :-}


I think I will have to get busy in the WIKI & write this up and do some pictures as this is getting to occure too often as a question.

TampaFZR I hope that satisfies your curiosity as to what needs to be done on the bike, If not you can ask again here or feel free to PM me, any questions you do ask as to this stuff will not only help me do abetter cleare write up but help the community as a whole.
Thanks
Y-G

Hey guys. I found this site not long ago while I was running through my carb troubles.

Carb Trouble Shooting

Also, here is some information you can find in the web site as well about some general rule of thumb for jetting carbs. I did a straight copy/paste on it, but the info is in the web site. NOTE, THEIR WEB SITE IS A LITTLE SLOW SOMETIMES AND NOT ALWAYS AVAILABLE.

Jetting Recommendations
by Denny Zander

Here is a simple set of jetting guidelines that have worked for me. For those considering jet changes, this might help select a starting point.

1 jet size for custom 4 into 2 exhaust

2 jet sizes for 4 into 1 exhaust

1 jet size for K&N filter (single inside airbox)

1 jet size for drilling out the bottom of the airbox

2 jet sizes for both single K&N and drilled airbox

2 jet sizes for individual filters

2 jet sizes for no muffler (open header)

1 pilot jet size for every 3 main jet size increase

Add up all the jet size increases and subtract one. (Remember they go in steps of 2.5 for each jet size)

Under a mismatch condition, like individual filters and stock exhaust or 4 into 1 header with stock filter and air box, subtract an additional 1 jet size.

Check plug color often, sync carbs after each jet change, make sure the floats are set correctly, and seriously consider purchasing a Color Tune. (See "Color tuning Carburetors" in the Maintenance Section).

Make sure your carbs are in perfect working order before making jet changes.

Example from my '79 XS1100 F:
Stock main jets: 137.5

Stock pilot jets: 42.5

2 sizes for 4:1 exhaust (Jardine)

1 size for single K&N

1 size for drilled air box

4 (main sizes) - 1 = 3 or 137.5 + (2.5 * 3) = 145.0
1 (pilot jet size) or 42.5 + (2.5 * 1) = 45.0

With this jet configuration I get 32-38 mpg on the open road, Smooth idle, very strong acceleration from off idle to 80+ mph, and steady pull past 120 mph. My "F" has 65K mile on it, of which I have put 33K with this jet configuration.

Not sure how accurate it is, but the theory seams sound.