jetting?

[riderssb250x]

alright my r is fiannaly almost done!!

new top end bottom end crank hone and rings and gaskets(moneypittt!)

im running the stocukon transmisiion new shaftsk 34mm pj what should my jetting be at to start /? i needa break it in so i dont wan it leanin out and screwin it up!

mods
wiseco .60 over
hotrod crank
yukon trans. new gears and shafts
fmf goldseries and powercore 2
foam filter
open box no lid
stock electronics


what should my jetting be guys?
? help me out soon!

[riderssb250x]

bumpp. Help me!

[1promodfan]

Why not just start with a 175 main and work your way down?? Are you needing help with your pilot too? If you want to be on the safe side for breaking it in, maybe start with a 180 main.

[riderssb250x]

should the poilot be changed to to have it running rich for the break in? i dont wana run it lean and blow it up

[1promodfan]

Yea I guess it wouldn't hurt to have the pilot rich for the initial break in. Then after that start fine tuning.

[riderssb250x]

so what is a good setup for the jettingon thebreakin?

Main- 180?
Pilot-?
needleposition?
A/fscrew?

[norcalduner]

Main - 175
Pilot - 55
Needle clip - 3rd groove
Air screw - 1 1/2 turns out from fully seated position

This should be close and SAFE if your elevation is at sea level. You WILL need to readjust accordingly after break-in.

[Honda 250r 001]

Originally posted by 1promodfan
Why not just start with a 175 main and work your way down?? Are you needing help with your pilot too? If you want to be on the safe side for breaking it in, maybe start with a 180 main.

i would start without a main jet. to get your pilot correct, and to be sure you wont blow up the motor.

[Honda 250r 001]

Originally posted by Honda 250r 001
i would start without a main jet. to get your pilot correct, and to be sure you wont blow up the motor. you need to start with a 168. that way it wont just flood the crap out of it at the top end,but it will have plenty plenty of oil to keep it lubed.

[riderssb250x]

man im confused?

put a 55 pilot in? start it and leave it?

AND WHAT SHOULD I START THE 168 OR 175 OR 180 EVERYONES SAYIN DIFFERENT!?

help me i gota go but jets tomorow so i can gert this going


im thinkin of geting a 55 pilot, a 168 main. 175, 180 and needle clip 3rd from toop i should be good top break in right?

[1promodfan]

Originally posted by riderssb250x
man im confused?

put a 55 pilot in? start it and leave it?

AND WHAT SHOULD I START THE 168 OR 175 OR 180 EVERYONES SAYIN DIFFERENT!?

help me i gota go but jets tomorow so i can gert this going


im thinkin of geting a 55 pilot, a 168 main. 175, 180 and needle clip 3rd from toop i should be good top break in right?


Thats the thing....its hard to tell someone how to jet because every location is different. It depends on where you're at, sea-level range, how your bike is set up, and most of all atmosphere (weather conditions.) Weather is the biggest factor is jetting. Thats why most guys don't comment on jetting question because there are so many different scenrio's.

Like I said before, put a 180 in just for the break in. Run through your heat cycles etc. Then when it comes to fine tuning, start with your pilot, then needle and do your main last. I had to learn the hard way on that one. No one can really tell you how to jet your bike because there are so many different factors. We can only help get you started. Its trial & error!!! Click on this link, it should help you.
http://www.duncanracing.com/techfaq/Tech_keihin-carburetion-jetting.phtml

[IcutMetl]

Listen to what these guys say; run a real fat main to begin with and start with the slow speed circuits first- the main is the easiest part to tune.

The pilot and the needle tuning gave me the most fits by far. There are so many different needle variations out there, it's mind boggling, but you should be able to get it tuned in well starting in the middle clip. I started out with a 60 pilot and 178main when I broke mine in, and worked progressively down to a 175/48 where it runs the best. However; I have a larger carb than you if yours is still stock, so I wouldn't be surprised if you ended up a little lower than what I did.

Good luck; break it in well, and have fun!

[riderssb250x]

so maybe start with a 180/65 to be on the fat side for break in
?

what about the needle and screw?

i know most of yous cant help perfectly but any input helps

im in ri (ocean state) elevation is 326 feet

the weather is usually from 50-75 this time of year

please help guys

[riderssb250x]

bumpp..

i meant 180/60 is that a good start? then 3rd clip and 1.5 turns out?

[riderssb250x]

also im not sure what needle i have im guessing stock, i just bought a rebuild kit for the stock 86 34mm carb so im guessing it comes with a stock needle i havent checked it out yet?


will this jetting be diferent with a diferent needle?

i really dont want a lean attack on the motor and seize it up i just got like 1,900 into it i need it to run awesome lol

[riderssb250x]

bump..

[Aceman]

Damn son, your fuel is going to gel by the time you get around to starting that thing! Quit screwing around and get with it. You're not going to lean the thing out, you'll probably end up fouling plugs if anything. Just follow Norcal's advice, unless you're looking for 20 more people to say the same thing.:confused:


Originally posted by norcalduner
Main - 175
Pilot - 55
Needle clip - 3rd groove
Air screw - 1 1/2 turns out from fully seated position

This should be close and SAFE if your elevation is at sea level. You WILL need to readjust accordingly after break-in.

[Honda 250r 001]

buy jets from 155-175. and start with the 175, you will find thats wayyyyyyy to rich, really fast, but thats the process of learning how to jet. put the slide on the 4th clip from the botttom, one clip slot down from the middle.

I was at the races last weekend and i blew a base gasket, ran lean and the temp of the motor was 250, plug was pure white, not a spot of black to be seen. But when i pulled it apart to replace the gasket, everyhting looked great, no scarring on the piston, scarring on the cylinder. those little machines are tuffer than you think.

you will be fine just start with a 175

[riderssb250x]

alright so for break in the 175 should be good,

what's ur opioniob in the pilot and air screw?