Honda Dirt Bikes Forum

My 2oo4 cr85 is running like crap from 3/4 throttle and up. Have cleaned carb,rejetted,air filter,new plug,gas,need Help  

wat elevation you at. do you have any aftermarket pipe or reeds. what is your current jetting at, i need to know your main, pilot, needle postion, air screw.  
1998 cr125
2002 cr80

Elevation range from 500 to 1000,stock pipe,140 main,45 pilot,flat slide kiehin carb,vforce reeds,needle postion at 4 from the bottom  Thanks  

Elevation 500-1000,stock pipe,vforce reeds,140 main 45 pilot,position 4 from bottom   Thanks  

i cant find the stock jetting for your bike so do you know what it is.  
1998 cr125
2002 cr80

FMF recommends a 125 main for this bike, so I'd say the 140 is your problem. They also recommend 3rd clip position from the top. We count from the top, not the bottom. Top=blunt end, bottom=point  

yeah his pilot is lean and his main is way rich i just wanted to know what the stock setting are so i can tell him what to change it too. the stock needle position is the 3rd. and i am going to go on a limb and say the stock main is probably around 128 or 130 and the pilot should be around 50. but the stock setting should be fine. i looked at v-force webseite and they said that the stock setting are normally good for their reeds.  
1998 cr125
2002 cr80

I forgot to say the motor is 90cc with porting done also.the first 4 races the bike ran like a champ. Then hit a large puddle on the track. Been down hill since then. What about the stator  Thanks  

What about the stator? Were the temps cooler for the first 4 races?  

Average temps around 75/85. race last weekend was hot week before cooler and rain, with same problem. wondering if getting odd readings from stator. Anyone know the voltage readings for the stator and pickup  

Running like crap at 3/4+ throttle is an issue w/ main jet.  Install the next smaller main and see if this solves your problem.  

does the problem continue all the way from 3/4 to wot.  
1998 cr125
2002 cr80

does the problem continue all the way from 3/4 to wot.

it could also be a needle issue if its only at 3/4. if it continues all the way to wot then it is a main issue.  
1998 cr125
2002 cr80

I have a 138 and a 135, I will try that tomorrow and see what that does  Thanks guys will let you know  

When I put the 135 in, it pops and backfires, way to lean. Put in the 138 no change from the 140. Back to square one again.