Fouling.........again

[Kerick]

I just had my bike proffesionally rebuilt (crank, rod, piston, rings, bearings) Im mixing my gas Premium with a 40:1 ratio w/ Klotz R50 racing oil. I toook my bike to my local track and i started it and immediatley fouled the plug after idling ashort time.(BR9EG) Then all i had to switch o was a BR10EG so i put that in and raced 2 times. Went home cuz it got dark . The next day i started it before i washed it and a little bit after idling it bogged and died. Whats wrong?

[hondawasaki]

Sounds like your running too rich. BTW never let your two stroke idle, your asking for fouled plugs. Does the jetting feel crisp at the bottom, or blubbery? I always tend to jet my bikes lean on the bottom, and rich on top. makes for a crisper throttle response. you get it jetted right, and you'll never have to change the plug again. I ran the same plug in my '03 yz125 for 5 years. good luck.

[Kerick]

The kid I got it from said he jetted it for the pipe...FMF Fatty w/ Powercore 2

[Kerick]

should i switch to a BR8EG?

[beets442]

I've had problems with NGK in two strokes(84' yz 125,84' 250r,76' H1) I went to an Autolite and haven't fouled yet with a 40:1 ratio. Is it smoking alot after its warmed up?Beets

[Kerick]

Not ttoo bad when its warm no. what kind of autolite did u use in the YZ?

[300rman]

after its warm, it shouldnt smoke at all. your jetting is too rich. could be the main, could be the needle clip. move the needle clip UP one notch to lower the needle into the carb a bit and lean it out. if this doesnt help, put the needle back to what it was before and get the next size leaner main jet.

an idling 2 stroke wont make it foul plugs, assuming you arent just letting it sit there and run all day. when im riding, sometimes my bike will sit and idle for 30 seconds-a minute.

a br10 is cooler than a br9. my 250 has a BR7.....look it up and see what the bike is SUPPOSED to have in it.

I run NGK, no problems

[Kerick]

i have NO idea how to jet lol

[MonroeMike]

http://www.3wheelerworldforums.com/showthread.php?t=55086

[300rman]

i have NO idea how to jet lol

figure out what kind of carb you have. probably a PJ or PWK. now, go to carbparts.com, look it up, and look at the schematics. you will see a breakdown of the carb, and it will show you exactly where the jets are. if you are still clueless, find someone local who does.

[Kerick]

I know what the jets are and where they are i just dont know how to pick what size needle and all tht i need

[MonroeMike]

Here's a manual for your bike.

http://cgi.ebay.com/ebaymotors/SUZUKI-RM125-OWNERS-SERVICE-MANUAL-RM-125_W0QQcmdZViewItemQQ_trksidZp4999Q2ec0Q2em14QQha shZitem5634d3b053QQitemZ370253475923QQptZMotorsQ5f ManualsQ5fLiterature

[300rman]

you shouldnt need to change the needle. theres a c-clip on the needle, with about 5 slots in it. take the c-clip out of the current slot and move the c-clip UP one notch.

the needle comes out of the slide.


the main jet should have a number stamped in it. simply read that number, and buy the next size lower from that jet. MAKE SURE YOU BUY ORIGINAL JETS meaning, make sure they are Keijin/Mikuni jets, not aftermarket crap. it will make getting it adjusted a nightmare.

if the bike starts easily and doesnt sputter at low RPM, then you dont even need to think about the pilot jet.

[Kerick]

Itll idle maybe 45 seconds just to warm it up and sometimes when i start to go it boggs and fouls...WHich jet would tht be?

[300rman]

Itll idle maybe 45 seconds just to warm it up and sometimes when i start to go it boggs and fouls...WHich jet would tht be?

No Idea. mess with the clip first, go to main second. if that still doesnt do it, go to the pilot. but every time an adjustment doesnt work, put it back to the way it was before you change something else. and make a note of ALL the adjustments before you change anything, that way if you FUBAR, you can go back to the way it was.

[MonroeMike]

Itll idle maybe 45 seconds just to warm it up and sometimes when i start to go it boggs and fouls...WHich jet would tht be?

Did you read the Carb Jetting thread?

[Kerick]

so i can just move the clip i dont have to buy a new jet?

[300rman]

so i can just move the clip i dont have to buy a new jet?

you OBVIOUSLY didnt read my post. i CLEARLY told you what to do, one step at a time. RE READ IT, i cant type it any clearer.

the info can be found
you shouldnt need to change the needle. theres a c-clip on the needle, with about 5 slots in it. take the c-clip out of the current slot and move the c-clip UP one notch.

the needle comes out of the slide.


the main jet should have a number stamped in it. simply read that number, and buy the next size lower from that jet. MAKE SURE YOU BUY ORIGINAL JETS meaning, make sure they are Keijin/Mikuni jets, not aftermarket crap. it will make getting it adjusted a nightmare.

if the bike starts easily and doesnt sputter at low RPM, then you dont even need to think about the pilot jet.

and HERE.


No Idea. mess with the clip first, go to main second. if that still doesnt do it, go to the pilot. but every time an adjustment doesnt work, put it back to the way it was before you change something else. and make a note of ALL the adjustments before you change anything, that way if you FUBAR, you can go back to the way it was.