The block box was the culprit!
I recenlty picked up a low-time 2001 KDX220 - ran really rich off of idle through mid, kinda seemed like a needle problem or a cork up it's arse. The previous owner had stuck a humongous needle in it to compensate - but no matter how lean the jets, it seemed like the plug was always wet after shut down and at mid-throttle it would never run clear. Jetting did help tho' which kinda faked me out some.
After the usual routine, checking for exhaust restriction, air way obstruction, wiring, etc...I swapped out the black box...and it ran perfectly.
Just something to file under troubleshooting "could be's".
Mystery rich condition
- kawagumby
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Mystery rich condition
1994 KDX200, Beta 200rr, yz125, yz250, kx100 modded for adult, gasgas contact 250.
- Velocity_Stack
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He is talking about the CDI box which is your ignition system.
Youtube Channel: WildAzzRacing
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R
AZ State Parks & Trails OHV Ambassador - Trail Riders of Southern AZ
Current KDX: '98 KDX220
Old KDX: '90 KDX200 -White/Blue
'11 GasGas EC250R