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Discussion Starter #1
im trying to check my jetting but i dont have a exhaust temp guage. i am trying to check the idle, the mid range, and the top end. could i just start it let it idle for a minute and shut it off and check the plugs, then run the sled at 50 mph and shut it off and check the plugs and then run it full open shut it off and check the plugs. i bought a 96 mxz583 for 800$ with 4500 miles on it he just got it ported last year and he cant figure the jetting out so i bought it to mess around with. just woundering how i can check the jetting. thanks for any help
 

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First of all, I would be most concerned with the full throttle jetting more than any other range. From there you can try different pilot jets and needle settings. Without a EGT sensor, it will be difficult to get it absolutely perfect in all carb positions, but you will have it very close. Remember too, everytime the temperature changes, you would have to adjust the jetting if you wanted it spot-on. Figure out which main jets you want to use, and then you can try different needle positions and pilot jets. To figure out the mains, remember to check the piston wash as well as the plugs.
 

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Discussion Starter #3
when doing this should i run it at full throttle then hit the kill switch and keep the throttle held open till the sled comes to a complete stop or should i let off the throttle after i hit the kill switch. thanks for any help
 

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Can you read piston wash? We can point you to a site that gives some
good info if not. The 583's were fairly easy to read the wash on. Much
different than the series 3 engines. Do you have a bend-a-light to stick
into down the head to read the wash?

I wouldn't be concerned about idle or midrange for not. Just don't hold
it on one spot for very long. Keep blipping the throttle.

For WOT, I would run it a very short distance WOT and then shut it down.
Check the wash and go from there. I would extend my WOT runs if I
was sure the jetting was safe. Then you can do the same in midrange (actually
less than 1/2 throttle). For the idle - you are more concerned does it
idle and does it have a smooth throttle response - not EGT's.

Good luck.
 

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Discussion Starter #5
well im familiar with the wash but i would like to look at the site if you can find it. ill go buy a bend a light thanks for the help this will help alot. you also dont think i should go by the color of the spark plug just go buy the wash.
thanks guys
 

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Get the ATACC from Holtzman Engineering and you will never have to adjust for temp or altitude again!
www.holtzmaneng.com check out the site, I bought mine for $200 at Haydays.

FZ700
 

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go to

www.eric-gorr.com

follow the links to technical articles and then to
diagnostic piston guide.

It will tell you what you are looking for when people
say they want to see a wash about the size of a thumbnail,
dime, you get the point.

One you get the wash right - take a look at your plugs.
This will give you a good indication on what "jetted right
on the spot" plugs look like.

Remember, if you get it perfectly at 20 degrees F, and then
ride at -10 F, you'll be lean.. If you don't want to switch
jets everytime you ride in a different set of conditions, I would
jet for normal riding conditions and go two sizes up to
be safe for bad gas, cold temps, etc.
 
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