[rhiocrf230]

I JUST BOUGHT 2007 CRF 230 WITH ABOUT 10 HOURS ON IT. THE BIKE IS ALL STOCK. I JUST ADDED THE POWER UP KIT AND REMOVED THE AIRBOX AN TAIL PIPE RESTRICTIONS. WE LIVE IN N CA. RIDING ELEVATION ABOUT 2000 FEET TEMP IN THE 60-S THE BIKE RUNS GREAT WITH NO ISSUES AT ALL EXCEPT THE SPARK PLUG IS SHOWING BLACK SOOT. I BELIEVE IT IS RUNNING TO RICH BUT SEES TO RUN GREAT. SHOULD I JUST LEAVE IT ALONE OR CHANGE SOME OF THE JETTING. THE NEEDLE JET IS IN THE MIDDLE POSITION AND AM RUNNING A 132 MAIN AND 48 PILOT. ADVISE WOULD BE GREAT...[/b]

[Old Dude]

The 120 main and a 45 or 48 pilot combo in the 230 have been thoroughly tested by Mike Coe (google the name) with some very imressive results.
O.D.

[Old Dude]

He (Mike aka CoeShow) has some interesting findings with regard to the power up needle vs specific OEM 230 needles.
O.D.