Hi
Breather hoses from the carb run down to the swing arm.
Is the oil pump working or are you running pre mix?
Have you tried cleaning the carb/jets? Fresh fuel, spark plug ....
Check for a good seal where the carb meets the inlet/airbox manifold.
How does it run at 1/4 throttle?

Hi Denes
Just looking on a KDX forum as it has pwk33/35 as stock. R1173N needle similar to BGP needle is popular.
I’m experiencing rich running from 1/8 -3/4 throttle. WOT is fine.

http://www.kyajet.de/?lang=en this is a helpful jetting calculator!

Will report back when I get somewhere.

Thanks Knackered
I have a few jets to try

Top

Thanks for the reply.
Mk2 fmf gnarly and fmf pipe
45 pilot
128 main
Cgm needle pos 1
Premix

Have you found a solution to this ?
I have tried similar but still running rich.

I'm struggling to cure this one... Recently bought this bike and its in pretty good nick, with a recent service. It has 30,000km on the clock and no service history. I believe it has been stored for some time. The bike idles well, starts okay and will keep up with crf's at WOT. When using gentle thr...

Bristol

This a great site with lots info, I like it. My first Crm 250 was sadly stolen 2 months after I bought it. It was a mk2 with just over 1000kms on the clock, GUTTED! However, that was over 10 years ago and 2 months is long enough to realise how great these bikes are! I am now on my 3rd and its a mk2 ...