Posted: 2007-02-07 12:18
I've got a Honda CRF250X and over the winter I rebuilt my engine with new rings, cylinder head etc. It starts perfect but keeps sooting up the spark plug. The bike has plenty of top end power but it will not idle properly. What would cause this?
From what you've described it sounds like the carb is gunked up. Take the carb off and either bring it to someone who is qualified to clean and adjust it or give it good thorough cleaning yourself. Be sure to follow the section that details cleaning and adjusting the carb in the fuel section of your repair manual.
You can find repair items for your CRF250X here: http://www.repairmanual.com/motorcycles/2005/1/1/16403
Thanks.
RepairManual.com
http://www.RepairManual.com