SPROCKETS
SPROCKETS
ALUMINUM REAR SPROCKETS
  • The 7075 T651 aluminum we use for these sprockets receives an extra tempering which
  • reduces distortion and provides optimal thickness vs. typically thinner 7075 T6 sprockets
  • 100% machined, no stamping or grinding
  • Optimal tooth thickness results in maximum tooth and chain contact
  • We leave the “cleaning” grooves out of our sprockets, because more aluminum contacting
  • your chain means longer chain and sprocket life
  • Moose Racing rear sprockets come anodized in black; select Moose Racing rear sprockets
  • are available in blue, orange, and red
  • See price list on page 391
  • Made in the U.S.A.
  • CHROMOLY STEEL FRONT SPROCKETS
  • Machined from impact and wear resistant chromoly steel
  • Inner splines are broached to provide maximum spline-to-countershaft contact – this helps distribute driveline forces over the largest possible area
  • Heat-treated, then finished with a nickel coating for corrosion resistance and lubricity
  • BE SURE TO CHECK FOR CLEARANCE WHEN ORDERING SIZES LARGER THAN STOCK
  • See price list on page 391
  • Made in the U.S.A.
  • STANDARD
    FRONT
    REAR
    STANDARD
    FRONT
    REAR
    FITS MODEL
    CHAIN
    GEARING
    SIZE
    P ART  #
    SIZE
    P ART  #
    FITS MODEL
    CHAIN
    GEARING
    SIZE
    P ART  #
    SIZE
    P ART  #
    HONDA
    HONDA (CONT)
    MB 5 82
    420-106 13/43
    12
    M603-21-12 4 -
    -
    CR80R 85
    420-114 15/49
    12
    M603-21-12 4 49
    M630-25-49
    MR50 74-75
    420-92
    -
    13
    M603-21-13 -
    -
    13
    M603-21-13 49
    1211-0660 1
    Z50A 69-71
    420-74
    13/34
    14
    M603-21-14 -
    -
    14
    M603-21-14 50
    M630-25-50
    Z50A 72-78
    420-76
    12/37
    15
    M603-21-15 -
    -
    15
    M603-21-15 50
    1211-0661 1
    Z50R 79-81
    420-76
    12/37
    -
    -
    -
    51
    1211-0662 1
    Z50R 82-87
    420-76
    13/37
    -
    -
    -
    52
    1211-0663 1
    Z50R 88-99
    420-76
    14/37
    -
    -
    -
    55
    1211-0666 1
    ZB50 88
    420-100 15/39
    -
    -
    -
    56
    1211-0150
    CRF/ XR50R 00-16
    420-78
    14/37
    14
    M603-25-14 35
    1211-0003
    -
    56
    1211-0667 1
    15
    M603-25-15 37
    M630-61-37
    CR80R 86-95
    420-114 15/49
    14
    M603-25-14 49
    M630-25-49
    -
    39
    1211-0004
    CR80R 96-02
    420-116 15/49
    15
    M603-25-15 49
    1211-0660 1
    CR60R 83-84
    420-104 14/45
    12
    M603-21-12 4 36
    M630-23-36
    CR85R 03-04
    420-116 15/50
    -
    50
    M630-25-50
    13
    M603-21-13 46
    M630-23-46
    CR85R 05-07
    420-116 15/49
    -
    50
    1211-0661 1
    14
    M603-21-14 -
    -
    CR85RB EXP 03-04
    420-116 15/56
    -
    51
    1211-0662 1
    15
    M603-21-15 -
    -
    CR85RB EXP 05-07
    420-116 15/55
    -
    52
    1211-0663 1
    CL70 69-70
    420-102 13/47
    12
    M603-21-12 4 -
    -
    -
    55
    1211-0666 1
    CL70 71-72
    420-102 13/49
    13
    M603-21-13 -
    -
    -
    56
    1211-0150
    C70 72-83
    420-96
    14/36
    14
    M603-21-14 -
    -
    -
    56
    1211-0667 1
    CT70 3-Speed 69-94 420-88
    -
    15
    M603-21-15 -
    -
    XL100S 79-80
    428-118 15/45
    13
    M603-31-13 -
    -
    CT/ SL70 71-72
    420-96
    -
    -
    -
    XL100S 81-83
    428-108 15/42
    14
    M603-31-14 -
    -
    XL70 74-76
    420-96
    13/44
    12
    M603-21-12 4 -
    -
    15
    M603-31-15 -
    -
    13
    M603-21-13 -
    -
    XR100R 81-84
    428-112 14/50
    13
    M603-31-13 -
    -
    14
    M603-21-14 -
    -
    14
    M603-31-14 -
    -
    15
    M603-21-15 -
    -
    15
    M603-31-15 -
    -
    XR70R 97-99
    420-86
    15/36
    12
    M603-21-12 4 36
    M630-23-36
    CRF/ XR100R 85-13
    428-118 14/50
    13
    M603-31-13 48
    1211-0002
    13
    M603-21-13 46
    M630-23-46
    14
    M603-31-14 48
    1211-0658 1
    14
    M603-21-14 -
    -
    15
    M603-31-15 50
    M630-34-50
    15
    M603-21-15 -
    -
    -
    50
    1211-0659 1
    CRF/ XR70R 00-12
    420-86
    15/36
    14
    M603-25-14 36
    M630-23-36
    CRF110F 13-16
    420-86
    14/38
    12
    M603-21-12 4 36
    M630-23-36
    15
    M603-25-15 46
    M630-23-46
    13
    M603-21-13 46
    M630-23-46
    XL75 77-79
    420-94
    14/36
    12
    M603-21-12 4 -
    -
    14
    M603-21-14
    -
    XR75 73-76
    420-100 14/44
    13
    M603-21-13 -
    -
    15
    M603-21-15
    -
    XR75 77-78
    420-100 14/46
    14
    M603-21-14 -
    -
    CB125S 70-73
    428-102 15/40
    15
    M603-32-15 -
    -
    15
    M603-21-15 -
    -
    SL125 71
    428-110 15/49
    -
    -
    XL80S 80-86
    420-96
    15/37
    12
    M603-21-12 4 -
    -
    NX125 88-90
    428-130 15/46-48
    15
    M603-32-15 -
    -
    XR80 79-84
    420-100 14/46
    13
    M603-21-13 -
    -
    CR125R 87-96
    520-114 13/51
    12
    M602-14-12 45
    M601-14-45
    14
    M603-21-14 -
    -
    CR125R 97
    520-114 12/49
    13
    M602-14-13 45
    1211-0648 1
    15
    M603-21-15 -
    -
    CR125R 98-99
    520-114 13/51
    -
    46
    M601-14-46
    CRF/ XR80R 85-13
    420-110 14/46
    12
    M603-21-12 4 36
    M630-23-36
    CR125R 00-01
    520-114 13/51
    -
    46
    1211-0649 1
    13
    M603-21-13 46
    M630-23-46
    CR125R 02
    520-114 13/51
    -
    47
    M601-14-47
    14
    M603-21-14 -
    -
    CR125R 03
    520-116 13/52
    -
    47
    1211-0650 1
    15
    M603-21-15 -
    -
    -
    48
    M601-14-48
    CR80R 80
    420-108 14/47
    12
    M603-21-12 4 -
    -
    -
    48
    1211-0651 1
    CR80R 81-83
    420-112 14/47
    13
    M603-21-13 -
    -
    -
    49
    M601-14-49
    14
    M603-21-14 -
    -
    -
    49
    1211-0652 1
    15
    M603-21-15 -
    -
    -
    50
    M601-14-50
    CR80R 84
    420-114 14/49
    12
    M603-21-12 4 36
    M630-23-36
    -
    50
    1211-0653 1
    13
    M603-21-13 46
    M630-23-46
    -
    51
    M601-14-51
    14
    M603-21-14 -
    -
    -
    50
    1211-0654 1
    15
    M603-21-15 -
    -
    -
    52
    M601-14-52
    -
    52
    1211-0655 1
    -
    53
    M601-14-53
    -
    53
    1211-0656 1
    -
    54
    M601-14-54
    -
    54
    1211-0657 1
    1 Red.
    4 P ART #M603-21-12 may require lock plate modification.
    SPROCKETS continued on next page.
    2018 PARTS UNLIMITED OFFROAD