Jetting 94 Honda CR250R
Posted 28 November 2009 - 01:16 PM
Here are the specs:
Keihin PJ style carb
55 pilot (stock size)
180 main (175 stock size)
Needle clip on 2nd notch (stock is 3rd)
Air screw 2 turns out (stock setting)
fuel mixture 40:1 Honda HP (stock mixture)
260 cylinder sleeve bored to 270 (what I was told by seller)
FMF exhaust (original)
Purchased 58 & 60 pilot, 170 thru 185 main jets
I tried the 58 pilot first with adjustment of air screw, then moved needle clip down one notch to 3rd (not sure if this has much impact on idle).
None of these changes improved my idling. Any ideas before I install the larger pilot jet?
Posted 28 November 2009 - 02:03 PM
It sounds as though a jet or passage is clogged.
Posted 28 November 2009 - 02:09 PM
Does float level affect idling? Maybe not enough feul getting to the pilot jet? Not sure how that works.
Posted 28 November 2009 - 02:14 PM
how many clicks out was it adjusted?
go richer on the pilot jet wont solve anything and will just make it run bad.
basically those carbs with that style idle adjustment were never meant to idle like that.
set up correctly it should idle for a few seconds than die off.
Posted 28 November 2009 - 02:20 PM
Posted 28 November 2009 - 07:10 PM
Adjusted probably 7 - 8 turns up.
Almost halfway to full choke
Doesn't the engine dying off in a couple seconds make it hard to ride?
easier,it wont try to tow yout hru the coraner when the idle fluctuates when its hot.
When riding in the woods now, it dies on me when pulling in the clutch to come to a stop. Is that right?
you need to blip the throttle to keep it running.
Maybe this is just the wrong bike for me
maybe.if you must have it idle just set the knob so it idles and move on.
Posted 28 November 2009 - 07:31 PM
If I can't get over having to blip the throttle all the time, I may have to invest in a newer 4 stroke enduro. I was really happy when I found this 2 stroke enduro, and it may be good for hare scramble races, but not for simple trail riding that I do.
Posted 08 January 2010 - 10:47 AM
Posted 08 January 2010 - 04:42 PM