hey neil, does the stock cdi have a rev limiter? I do not want to sound stupid but I had the opportunity to test my motor limit when I rode it at max throttle in a dry lake bed in the mojave desert. it sounds like the engine is bogging or cutting off at extended max throttle at 6th gear and I end up constantly pulling the plug ..... but the jetting seem spot on from the light brown color. Could it be a mismatched port/pipe combo. Im running ct 350 mx port, cr250 rad valve, trx5 centermount pipe. any input appreciated. thanks.