need more help... carb this time

[04blasterkid]

ok well as u guys know i just bought this, it has a kehith carb (stock?) reed spacer (stock?) and only performance mods besides those are fmf head pipe (stock silencer) and uni air filther with the lid on...

problem: i was riding it all day, running good, smokes for a while after start up (20-30min) and then goes good, i was going down a dirt road 6th WOT and it just died, so i thought i blew sumtin... wouldnt start... waited 15-20 min and it started road home fine, took it easy... so i thought everything was alirght

then today i go out for a ride, get into 6WOT for about 20 sec and it started to cut out and die... pulled in clutch and reved... it was fine, decided to turn around before i went any father and it would cut out in 4th, down shift to 3rd it would be alright for a lil then cut out... before i knew it i was in first and it stalled, wouldnt start for a couple mins.. then i putted home...

soz for the long post, but anyone have troubls like this before? i havnt checked the jetting but the plug is a lil black, im mixing 40:1

also i put a b7es plug in because it was foulin 8's... idk if this is the prob. or not.. wouldnt think it could be

[my88r]

WHAT NEEDLE POSTION IS THE CLIP ON
WHAT MAIN JET
WHAT PILOT JET
FLOATS AT THE RIGHT HIGHTH 16MM

need to know this stuff and run the bre8es plug.

[04blasterkid]

i took the carb out, cant get the bowl off..

[my88r]

Originally posted by 04blasterkid
i took the carb out, cant get the bowl off..

do you mean the screws on the bowl or what. what are the numbers on the needle.

[04blasterkid]

uhh yea i cant get the screws out, do you have aim? my sn is tcreighton0826 if you do...

[my88r]

Originally posted by 04blasterkid
uhh yea i cant get the screws out, do you have aim? my sn is tcreighton0826 if you do...

no i did.

[04blasterkid]

i used vicegrips to get screws out, um the jet is a symbol and then numbers 172... this is the jet thats in the cente rof the bowl

im not sure how to check the other stuff... the needle is attched to throttle cable right? it has left to right play in it but no visble numbers, is the pilot same as air screw? soz for newb Q's

[my88r]

Originally posted by 04blasterkid
i used vicegrips to get screws out, um the jet is a symbol and then numbers 172... this is the jet thats in the cente rof the bowl

im not sure how to check the other stuff... the needle is attched to throttle cable right? it has left to right play in it but no visble numbers, is the pilot same as air screw? soz for newb Q's

if your this inexperienced i would get a honda service manuel. stock is a 150 so the 172 is to big for your mods.

[04blasterkid]

i changed the main jet on my blaster, and ajusted air screw.. thats all iever had to do though... does it sound like its jetted for winter? cause the ice raced. and then it sat for about a year so im not sure if they ever put it back down for the summer... should i try a 160 main? im also gona check the reeds while its apart

[2StrokeGod]

172 is a little fat for the mods try a 168 and do your plug chops and go from there and find out what needdle and what clip its in.

[04blasterkid]

what needdle and what clip its in.

this is my problem... im a good learner haha, anyway u could throw a pic up?

[my88r]

Originally posted by 04blasterkid
what needdle and what clip its in.

this is my problem... im a good learner haha, anyway u could throw a pic up?

GET A MANUEL

[04blasterkid]

its not just that easy when you want to ride in 2 days...

you helped alot, if i take my airbox lid off wil this even it out more or lean it out way to much?

[my88r]

Originally posted by 04blasterkid
its not just that easy when you want to ride in 2 days...

you helped alot, if i take my airbox lid off wil this even it out more or lean it out way to much?

not that much. i would put it back to stock jetting. 150 main,needle in the 3rd groove,and 45 pilot.but what year 250r motor and carb is it in it.

[04blasterkid]

soz i thought i said it was a 1987 250r, as far as i know it is a stock carb. and the motor is .20 bore if that matters... and a reed spacer, possible reeds... i just bought it trying to get it running right, the guy told me it just had head pipe bore and uni

[04blasterkid]

tommaro when i get out of school at noon i will come on here and post pics of my reeds,carb, and everything... so you guys can help me out if you want...

[2StrokeGod]

When i was running the same mods i had a 162 main needle in the middle and 47 pilot. dont go any leaner than 162 on the main until u do plug chops.

[04blasterkid]

is the piolet next to the main and it screw in wit a regular screw driver?

[86 Quad R]

read THIS (http://www.duncanracing.com/techfaq/Tech_keihin-carburetion-jetting.phtml) tech article. it'll help you better understand whats going on with a carb and how it works. great info