2006 KX450f idle problems
Posted 18 October 2010 - 01:38 PM
Posted 18 October 2010 - 04:50 PM
Posted 18 October 2010 - 09:57 PM
pilot = 42
screw 2.25 (+/- 1/4 turn depending on conditions).
needle = stock.
needle clip = middle or +1 (stock or richer).
main = 175 or 172 (stock or leaner).
If the previous owner had the screw in all the way, then perhaps the idle was set way high. That could mean it was lean and hanging high and/or the throttle position sensor never knows you want the throttle properly shut so the CDI wont reduce the spark advance. There is a chance the TPS is faulty, but sounds like you know the problem now.
Wont help a hanging idle, but next time the carb is off, check the action of your accel pump and condition of the AP diaphragm.
New throttle cables aint a bad idea. Check everything on the bike. Do more than a fluid swap. Consider reinstalling (locktite or lubing) most things like brakes, sprockets, bars, kick starter, hotstarter plunger and also re-grease the headstem, swingarm and linkage bearings. The spokes will probably need checking too, and maybe need some anti-seize on all nipple threads (remove rubber). If the piston age is unknown then just get it replaced with an after-market part. The stock wheels are pretty tough and light.
As you probably know, with good suspension and chassis setup it becomes a great bike and worth "restoring". The engine is beautiful and pulls tall gears with relative ease but still revs a long way. You'll probably like long start straights. After 06, the KX450 became 2 to 4 lbs heavier every year.
Posted 19 October 2010 - 08:45 PM
Posted 22 October 2010 - 03:08 PM