What kind of jetting does a Honda CR250 need?
Higher elevations, high humidity, hotter temperatures are examples that will require leaner jetting. Colder temperatures are an example that will require richer jetting. If you are unknowledgeable or don’t feel comfortable tuning your machine yourself, find a mechanic in your area who is.
Why does my CRF250R have a lean bog?
I recently had the pleasure of performing a complete frame down rebuild on a 2007 CRF250R that came to me with an intolerable bog issue when the throttle was stabbed from idle or low RPM (both when riding, and on the stand). After the head was rebuilt, and the engine freshened up with a new piston and rings, the lean bog was still there.
What makes a 2007 Honda CRF250R better?
The Honda race team has been using a small vent in the bottom end that releases some of the extra pressure developed on the piston’s downward return, allowing the engine to work slightly more efficiently and therefore deliver more-and better-power. The 2007 comes with this race-team trickery.Honda didn’t ignore the rest of the bike.
Do you need a PWK for a Honda CR250?
Now to find out which PWK A/S will fit your motocross bike, you must determine the year of your Honda CR250 or CR125. The 2000-2003 CR125’s have the older, long-body style with no TPS (85mm length). They will need the longer A/S with the screw cap, which is the first one on the left in the image above.
Higher elevations, high humidity, hotter temperatures are examples that will require leaner jetting. Colder temperatures are an example that will require richer jetting. If you are unknowledgeable or don’t feel comfortable tuning your machine yourself, find a mechanic in your area who is.
I recently had the pleasure of performing a complete frame down rebuild on a 2007 CRF250R that came to me with an intolerable bog issue when the throttle was stabbed from idle or low RPM (both when riding, and on the stand). After the head was rebuilt, and the engine freshened up with a new piston and rings, the lean bog was still there.
What kind of carburetor does a Honda CR250 use?
The 2001-2003 CR250 also uses the same carburetor (the ’00 already has the PWK A/S). The 2004 and newer Honda CR two-strokes have the newer, short-body (75mm). If you can’t remember that, just remember that if your bike doesn’t have a TPS carb, then you need the older long-body with the screw cap.
Now to find out which PWK A/S will fit your motocross bike, you must determine the year of your Honda CR250 or CR125. The 2000-2003 CR125’s have the older, long-body style with no TPS (85mm length). They will need the longer A/S with the screw cap, which is the first one on the left in the image above.