Honda CR 250R 86-03 year standart jettings
Добавлено: Пн апр 04, 2011 8:00 pm
18033 S. Santa Fe Ave
Rancho Dominguez, CA 90221-5514
PH: 310-631-4363 FX: 310-900-5699
www.fmfracing.com tech@fmfracing.com
[02-03 / #000300]
HONDA CR250 JETTING RECOMMENDATIONS
Here are our jetting suggestions for your CR250. We’ve spent countless hours of testing to determine which settings work best
when bolting on one of our pipes and silencers to a stock machine. These are recommendations only, based upon our testing at
sea-level atmospheric pressure, a 65-80F degree ambient air temperature, a 32:1 fuel to oil mixing ratio on super unleaded
pump fuel with a stock motor.
For some models we offer a Power Up jet kit for optimum tuning. Kits may include jets, needles and any necessary hardware
and have been developed with the assistance of Dynojet.
There are too many variables outside of our control to give you an exact configuration that works perfectly under all conditions. Our
recommendations are just that, a starting point to reference from. 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. FMF Racing is not
responsible for problems derived from improper jetting and/or usage.
Always check that your jetting is correct when changing parts that could affect the intake system, exhaust system and any product or change
that could alter fuel combustion in the cylinder (ie. aftermarket ignition module).
Check out our website www.fmfracing.com for additional information.
Use the following suggestions when using a FMF Fatty, Factory Fatty, Gnarly, Rev or SST exhaust pipe.
2003
Main Jet 400
Pilot Jet 40
Needle 38-70
Clip Position 1ST
Air Screw 1.5 out
2002
Main Jet 380
Pilot Jet 32.5
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
2000
Main Jet 178
Pilot Jet 45
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1999
Main Jet 178
Pilot Jet 42
Needle STOCK
Clip Position 2ND
Air Screw 1.5 out
1997
Main Jet 172
Pilot Jet 55
Needle STOCK
Clip Position 2ND
Air Screw 1.5 out
1996
Main Jet 175
Pilot Jet 52
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
1998
Main Jet 172
Pilot Jet 55
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1995
Main Jet 172
Pilot Jet 52
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
2001
Main Jet 400
Pilot Jet 30
Needle STOCK
Clip Position 2ND
Air Screw 1.5 out
1994
Main Jet 172
Pilot Jet 55
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
1993
Main Jet 175
Pilot Jet 55
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
1992
Main Jet 170
Pilot Jet 55
Needle R1369N
Clip Position 2ND
Air Screw 1.5 out
1991
Main Jet 175
Pilot Jet 55
Needle R1369N
Clip Position 2ND
Air Screw 1.5 out
1990
Main Jet 175
Pilot Jet 55
Needle R1369N
Clip Position 2ND
Air Screw 1.5 out
1988
Main Jet 185
Pilot Jet 62
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1987
Main Jet 175
Pilot Jet 58
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1989
Main Jet 178
Pilot Jet 58
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1986
Main Jet 175
Pilot Jet 60
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
Rancho Dominguez, CA 90221-5514
PH: 310-631-4363 FX: 310-900-5699
www.fmfracing.com tech@fmfracing.com
[02-03 / #000300]
HONDA CR250 JETTING RECOMMENDATIONS
Here are our jetting suggestions for your CR250. We’ve spent countless hours of testing to determine which settings work best
when bolting on one of our pipes and silencers to a stock machine. These are recommendations only, based upon our testing at
sea-level atmospheric pressure, a 65-80F degree ambient air temperature, a 32:1 fuel to oil mixing ratio on super unleaded
pump fuel with a stock motor.
For some models we offer a Power Up jet kit for optimum tuning. Kits may include jets, needles and any necessary hardware
and have been developed with the assistance of Dynojet.
There are too many variables outside of our control to give you an exact configuration that works perfectly under all conditions. Our
recommendations are just that, a starting point to reference from. 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. FMF Racing is not
responsible for problems derived from improper jetting and/or usage.
Always check that your jetting is correct when changing parts that could affect the intake system, exhaust system and any product or change
that could alter fuel combustion in the cylinder (ie. aftermarket ignition module).
Check out our website www.fmfracing.com for additional information.
Use the following suggestions when using a FMF Fatty, Factory Fatty, Gnarly, Rev or SST exhaust pipe.
2003
Main Jet 400
Pilot Jet 40
Needle 38-70
Clip Position 1ST
Air Screw 1.5 out
2002
Main Jet 380
Pilot Jet 32.5
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
2000
Main Jet 178
Pilot Jet 45
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1999
Main Jet 178
Pilot Jet 42
Needle STOCK
Clip Position 2ND
Air Screw 1.5 out
1997
Main Jet 172
Pilot Jet 55
Needle STOCK
Clip Position 2ND
Air Screw 1.5 out
1996
Main Jet 175
Pilot Jet 52
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
1998
Main Jet 172
Pilot Jet 55
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1995
Main Jet 172
Pilot Jet 52
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
2001
Main Jet 400
Pilot Jet 30
Needle STOCK
Clip Position 2ND
Air Screw 1.5 out
1994
Main Jet 172
Pilot Jet 55
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
1993
Main Jet 175
Pilot Jet 55
Needle R1369N
Clip Position 3RD
Air Screw 1.5 out
1992
Main Jet 170
Pilot Jet 55
Needle R1369N
Clip Position 2ND
Air Screw 1.5 out
1991
Main Jet 175
Pilot Jet 55
Needle R1369N
Clip Position 2ND
Air Screw 1.5 out
1990
Main Jet 175
Pilot Jet 55
Needle R1369N
Clip Position 2ND
Air Screw 1.5 out
1988
Main Jet 185
Pilot Jet 62
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1987
Main Jet 175
Pilot Jet 58
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1989
Main Jet 178
Pilot Jet 58
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out
1986
Main Jet 175
Pilot Jet 60
Needle STOCK
Clip Position 3RD
Air Screw 1.5 out