Hi all, hoping to get some advice from the Experts.
We run 2 x CRF230F bikes ( 2005 and 2008 ), identically setup carbs.
One of the bikes seem to be running a bit lean, see picture attached for your comments.
The only difference between Bike A and B is that Bike B has a fresh new top-end rebuilt. Standard OEM piston, rings. Valve-stem seals, valves lapped
Both were run for quick 20 minute out-ride with new plugs, mostly low to mid range rpm and about 3-5 runs WOT for 20 seconds or so.
In case picture is unclear, here are the details:
Plug Left = Bike A Plug Right = Bike B
Both carbs are identically setup.
45 Pilot
125 Main
Needle clip 4th from top ( running 03-05 needles )
Airbox restrictor = OFF
Standard Header
Performance ( silencer only )
Altitude 4,500 ft
Temp 20-35Deg C ( 70-90f )
Comment: We have run 128 Mains before with no issues, maybe reconsider going back to 128 main jets ?
Your opinions / recommendations will be appreciated.