Hi Guys,
I have a 04 CRF450R that I have owned for a few months. The bike has been great until recently. After changing my air filter (I think) the bike started to idle funny. It would initially idle high, then I would turn it down a little and then it would almost stall so I have to turn it up again. It also seems to stick on a high idle when I blip the throttle. During startup the exhaust pops and backfires at times. I should also mention that I can get a perfect idle with the choke on and the idle screw turned down. On the other hand, off idle performance is great.
Does this indicate a lean condition? How did this happen without any adjustments?
On a side note, when I leave the bike idling for 5-10 minutes (while I am trying to figure out this problem). It seems to heat up quite a lot and it spits out some coolant. Is this normal?
Thank you for your help,
Alex