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Please select the right Jet Kit for your bike year and model. Please make sure to read each Stage for information on that nfo section for the listed model for proper compatibility with your motorcycle.

Important: Below are the Jet Kit Stage descriptions. Be sure to read each Stage, by clicking each button below, before purchasing the corresponding Jet Kit.

Jet Kit: 050 cc YAM 87-92 YSR50 Stage 2 Dynojet Research Inc. 4223
Jet Kit: 250 cc YAM 08 Y250F Dynojet Research Inc. 4132
Jet Kit: 250 cc YAM 2010 YZ250F Dynojet Research Inc. 4157
Jet Kit: 250 cc YAM 2012 YZ250F Stage 1 Dynojet Research Inc. 4158
Jet Kit: 250 cc YAM WR250F 01-04 STG1 Dynojet Research Inc. 4112
Jet Kit: 250 cc YAM WR250F 05-12 STG2 Dynojet Research Inc. 4125
Jet Kit: 250 cc YAM YZ250F 01-04 STG1 Dynojet Research Inc. 4104
Jet Kit: 250 cc YAM YZ250F 05 STG1 Dynojet Research Inc. 4121
Jet Kit: 250 cc YAM YZ250F 06 STG1 Dynojet Research Inc. 4119
Jet Kit: 250 cc YAM YZ250F 07 STG1 Dynojet Research Inc. 4120
Jet Kit: 350 cc YAM 84-85 RZ350 Stage 3 Dynojet Research Inc. 4304
Jet Kit: 400 cc YAM 88-90 FZR400 Stage 1 & 3 Dynojet Research Inc. 4126
Jet Kit: 426 cc YAM 00-02 YZ426F Dynojet Research Inc. 4190
Jet Kit: 450 cc YAM 03-04 WR450F Dynojet Research Inc. 4118
Jet Kit: 450 cc YAM 05-08 WR450F STG2 Dynojet Research Inc. 4150
Jet Kit: 450 cc YAM 06 YZ450F STG 1 Dynojet Research Inc. 4144
Jet Kit: 450 cc YAM 07 YZ450F Dynojet Research Inc. 4136
Jet Kit: 450 cc YAM 08-09 YZ450F Dynojet Research Inc. 4154
Jet Kit: 450 cc YAM YZ450F 03-04 Dynojet Research Inc. 4117
Jet Kit: 450 cc YAM YZ450F 05 Dynojet Research Inc. 4130
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