Honda Dirt Bikes Forum

ok so my friend has a 2001 cr125 and he asked me to jet it for him and i was wondering if anything is wrong with the stock jetting on that bike. he lives around 1000 feet.  
1998 cr125
2002 cr80

probably not. but if you want the bike to run top notch, and not spooge.. i'd jet it. also, it depends if you have the bike piped or not. clean the carb for him too.. he'd be happy.  

i was just curious cause i know that a lot of the cr's were jetted rich. he has the stock pipe on it.  
1998 cr125
2002 cr80

The biggest problem with the jetting on that bike was a stupid-rich pilot.  Switch to a 37.5 and dial in the airscrew.
As for the rest, the main is fine, but he should try the needle in clip #2 and see if it doesn't run a little snappier.  
Since when is Dirt blue??!!!

thanks skip i will try that and see how it works  
1998 cr125
2002 cr80

ok so i found the jetting that mxa used on their stock bike.

they left the main and pilot the same. the stock needle is a 6BEG20-68 but they changed that to this 6BEG21-69, put the clip on the 1st position, the moved the air screw for 2.25 turns to 1.5 turns, and slide stock is 5 but they recommend 4.5

do you think these changes sound right and do you think i should make these changes to his bike.  
1998 cr125
2002 cr80

Elko - I don't agree with their jetting... before you go spend a lot of time with that, change the pilot and try the clip move I recommended.  If it doesn't make it run right, then you can go hog wild with MXA's jetting changes  Slides aint cheap, brother!  
Since when is Dirt blue??!!!

yeah. thats what i thought i just wanted to see if their jetting would really be worth it.  
1998 cr125
2002 cr80