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Street Bike Engine

Street Bike Engine

Street Bike Engine

Street Bike Engine Parts at JJ Motorsports

Rebuild and upgrade your street bike engine with precision parts from JJ Motorsports. Our inventory includes valves, complete gasket sets, and seals made from top-quality materials for optimal sealing, compression, and durability in high-performance applications. Compatible with Honda, Suzuki, BMW, Yamaha, and more, these components support full engine rebuilds, leak prevention, and enhanced reliability for sportbikes, cruisers, or tourers on the road or track.

Shop trusted brands like VESRAH for OEM-matching valves and gaskets. Explore related categories such as street bike air and fuel for intake upgrades or street bike drivetrain for transmission pairings.

Top Street Bike Engine Products

Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • ATHENA Complete Gasket Kit - Suzuki P400510850055

    ATHENA Complete Gasket Kit - Suzuki P400510850055

    ATHENA

    $237.95
    Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and superior tensile strength, Revolutionary transparent...
    09342039
    SKU:
    09342039
    Availability:
    Ships Same Business Day
    Weight:
    0.84 LBS
    RIDING STYLE:
    STREET
    ENGINE TYPE:
    4-STROKE
    PRODUCT NAME:
    GASKET KIT
    TYPE:
    COMPLETE
    UNITS:
    KIT
    $237.95
    Qty in Cart: 0
    Quantity:
    Price:
    $237.95
    Subtotal:
  • ATHENA Top End Gasket Kit - Honda P400210600229

    ATHENA Top End Gasket Kit - Honda P400210600229

    ATHENA

    $350.95
    Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression. Kits do not...
    09342042
    SKU:
    09342042
    Availability:
    Ships Same Business Day
    Weight:
    0.73 LBS
    MATERIAL:
    SPRING STEEL
    RIDING STYLE:
    STREET
    UNITS:
    KIT
    PRODUCT NAME:
    GASKET KIT
    TYPE:
    TOP END
    $350.95
    Qty in Cart: 0
    Quantity:
    Price:
    $350.95
    Subtotal:
  • ATHENA Top End Gasket Kit - Kawasaki P400250620052

    ATHENA Top End Gasket Kit - Kawasaki P400250620052

    ATHENA

    $143.95
    Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression. Kits do not...
    09342047
    SKU:
    09342047
    Availability:
    Ships Same Business Day
    Weight:
    0.18 LBS
    TYPE:
    TOP END
    UNITS:
    KIT
    PRODUCT NAME:
    GASKET KIT
    RIDING STYLE:
    STREET
    MATERIAL:
    SPRING STEEL
    $143.95
    Qty in Cart: 0
    Quantity:
    Price:
    $143.95
    Subtotal:
  • ATHENA Complete Gasket Kit - BMW P400068850750

    ATHENA Complete Gasket Kit - BMW P400068850750

    ATHENA

    $144.95
    Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and superior tensile strength, Revolutionary transparent...
    09342880
    SKU:
    09342880
    Availability:
    Ships Same Business Day
    Weight:
    0.61 LBS
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    ENGINE TYPE:
    -
    TYPE:
    COMPLETE
    UNITS:
    KIT
    PRODUCT NAME:
    GASKET KIT
    RIDING STYLE:
    STREET
    Qty in Cart: 0
    Quantity:
    Price:
    $144.95
    Subtotal:
  • ATHENA Top End Gasket Kit - Honda P400210600650/1

    ATHENA Top End Gasket Kit - Honda P400210600650/1

    ATHENA

    $133.95
    Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression. Kits do not...
    09342883
    SKU:
    09342883
    Availability:
    Ships Same Business Day
    Weight:
    0.38 LBS
    TYPE:
    TOP END
    UNITS:
    KIT
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    GASKET KIT
    $133.95
    Qty in Cart: 0
    Quantity:
    Price:
    $133.95
    Subtotal:
  • POWERSTANDS RACING Oil Cap Kit - Black - M24 x 2.0 00-01316-22

    POWERSTANDS RACING Oil Cap Kit - Black - M24 x 2.0 00-01316-22

    POWERSTANDS RACING

    $31.95
    CNC-machined from high-quality aluminum, E-clip is already safety wired to a mounting tab and the wire covered with silicon tubing that will not melt or discolor, Excellent resistance to extreme heat
    09500431
    SKU:
    09500431
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    COLOR/FINISH:
    ANODIZED
    COLOR/FINISH:
    BLACK
    UNITS:
    KIT
    DIAMETER - THREAD SIZE IMPERIAL:
    M24 X 2.0
    PRODUCT NAME:
    CAP KIT
    TYPE:
    OIL FILLER
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    STREET
    $31.95
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • POWERSTANDS RACING Oil Cap Kit - Silver - M27 x 3.0 00-01313-21

    POWERSTANDS RACING Oil Cap Kit - Silver - M27 x 3.0 00-01313-21

    POWERSTANDS RACING

    $31.95
    CNC-machined from high-quality aluminum, E-clip is already safety wired to a mounting tab and the wire covered with silicon tubing that will not melt or discolor, Excellent resistance to extreme heat
    09500433
    SKU:
    09500433
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    DIAMETER - THREAD SIZE IMPERIAL:
    M27 X 3.0
    TYPE:
    OIL FILLER
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    ANODIZED
    COLOR/FINISH:
    SILVER
    PRODUCT NAME:
    CAP KIT
    UNITS:
    KIT
    $31.95
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • POWERSTANDS RACING Oil Cap Kit - Black - M27 x 3.0 00-01313-22

    POWERSTANDS RACING Oil Cap Kit - Black - M27 x 3.0 00-01313-22

    POWERSTANDS RACING

    $31.95
    CNC-machined from high-quality aluminum, E-clip is already safety wired to a mounting tab and the wire covered with silicon tubing that will not melt or discolor, Excellent resistance to extreme heat
    09500434
    SKU:
    09500434
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    DIAMETER - THREAD SIZE IMPERIAL:
    M27 X 3.0
    MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    CAP KIT
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    ANODIZED
    COLOR/FINISH:
    BLACK
    TYPE:
    OIL FILLER
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • POWERSTANDS RACING Oil Cap Kit - Gun Metal - M27 x 3.0 00-01313-29

    POWERSTANDS RACING Oil Cap Kit - Gun Metal - M27 x 3.0 00-01313-29

    POWERSTANDS RACING

    $31.95
    CNC-machined from high-quality aluminum, E-clip is already safety wired to a mounting tab and the wire covered with silicon tubing that will not melt or discolor, Excellent resistance to extreme heat
    09500435
    SKU:
    09500435
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    DIAMETER - THREAD SIZE IMPERIAL:
    M27 X 3.0
    COLOR/FINISH:
    ANODIZED
    COLOR/FINISH:
    GUNMETAL
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    CAP KIT
    TYPE:
    OIL FILLER
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • POWERSTANDS RACING Oil Cap Kit - Silver - M30 x 1.5 00-01314-21

    POWERSTANDS RACING Oil Cap Kit - Silver - M30 x 1.5 00-01314-21

    POWERSTANDS RACING

    $31.95
    CNC-machined from high-quality aluminum, E-clip is already safety wired to a mounting tab and the wire covered with silicon tubing that will not melt or discolor, Excellent resistance to extreme heat
    09500436
    SKU:
    09500436
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    SILVER
    DIAMETER - THREAD SIZE IMPERIAL:
    M30 X 1.5
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    PRODUCT NAME:
    CAP KIT
    TYPE:
    OIL FILLER
    COLOR/FINISH:
    ANODIZED
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • SHOW CHROME Oil Dipstick - XVS950 VSTAR 63-214

    SHOW CHROME Oil Dipstick - XVS950 VSTAR 63-214

    SHOW CHROME

    $31.95
    Chrome dipstick with cap, Replaces OEM plastic cap and dipstick, Uses existing OEM O-ring
    09500324
    SKU:
    09500324
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    PRODUCT NAME:
    DIPSTICK
    COLOR/FINISH:
    CHROME
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    TYPE:
    ENGINE
    $31.95
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • K&L SUPPLY Valve Shim - 2.50 - 7.50mm 13-6749

    K&L SUPPLY Valve Shim - 2.50 - 7.50mm 13-6749

    K&L SUPPLY

    $14.30
    K&L SUPPLY Valve Shim 2.50 7.50mm 13-6749For shim-adjusted vehicles
    136749
    SKU:
    136749
    Availability:
    Ships Same Business Day
    Weight:
    0.02 LBS
    PRODUCT NAME:
    SHIM
    RIDING STYLE:
    OFF-ROAD
    VALVE SHIM THICKNESS METRIC:
    2.50 MM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    SNOW
    RIDING STYLE:
    UTV
    UNITS:
    5 PACK
    OUTSIDE DIAMETER METRIC:
    7.50 MM
    RIDING STYLE:
    STREET
    RIDING STYLE:
    WATERCRAFT
    RIDING STYLE:
    ATV
    TYPE:
    VALVE
    $14.30
    Qty in Cart: 0
    Quantity:
    Price:
    $14.30
    Subtotal:
  • K&L SUPPLY Valve Shim - 2.55 - 7.50mm 13-6750

    K&L SUPPLY Valve Shim - 2.55 - 7.50mm 13-6750

    K&L SUPPLY

    $15.00
    K&L SUPPLY Valve Shim 2.55 7.50mm 13-6750For shim-adjusted vehicles
    136750
    SKU:
    136750
    Availability:
    Ships Same Business Day
    Weight:
    0.01 LBS
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    ATV
    OUTSIDE DIAMETER METRIC:
    7.50 MM
    PRODUCT NAME:
    SHIM
    RIDING STYLE:
    STREET
    VALVE SHIM THICKNESS METRIC:
    2.55 MM
    RIDING STYLE:
    OFF-ROAD
    RIDING STYLE:
    SNOW
    RIDING STYLE:
    UTV
    TYPE:
    VALVE
    UNITS:
    5 PACK
    RIDING STYLE:
    WATERCRAFT
    $15.00
    Qty in Cart: 0
    Quantity:
    Price:
    $15.00
    Subtotal:
  • KIBBLEWHITE Spring Kit 60-60560

    KIBBLEWHITE Spring Kit 60-60560

    KIBBLEWHITE

    $144.69
    KIBBLEWHITE Spring Kit 60-60560Extensive R&D on all applications to provide high-performance components that last longer than OEM, Super-clean silicon wire used in valve springs is ground, not shaved, and X-rayed at regular intervals to check for flaws,...
    09260862
    SKU:
    09260862
    Availability:
    Ships Same Business Day
    Weight:
    1.60 LBS
    SPRING OPEN PRESSURE:
    195 LB
    SPRING SEAT PRESSURE:
    65 LB
    UNITS:
    KIT
    SPRING LIFT IMPERIAL:
    0.415'
    TYPE:
    VALVE
    APPLICATION:
    INTAKE
    MATERIAL:
    CHROME-SILICON
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    SPRING KIT
    RIDING STYLE:
    STREET
    $144.69
    Qty in Cart: 0
    Quantity:
    Price:
    $144.69
    Subtotal:
  • KIBBLEWHITE Intake Valve 30-4221

    KIBBLEWHITE Intake Valve 30-4221

    KIBBLEWHITE

    $31.01
    KIBBLEWHITE Intake Valve 30-4221Black Diamondâ„¢ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamondâ„¢ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U...
    09263048
    SKU:
    09263048
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    MODEL:
    BLACK DIAMONDâ„¢
    TULIP ANGLE:
    23°
    APPLICATION:
    INTAKE
    LENGTH IMPERIAL:
    3.535'
    STEM DIAMETER IMPERIAL:
    0.2157'
    UNITS:
    EACH
    HEAD DIAMETER METRIC:
    25.02 MM
    RIDING STYLE:
    STREET
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE
    $31.01
    Qty in Cart: 0
    Quantity:
    Price:
    $31.01
    Subtotal:
  • KIBBLEWHITE Exhaust Valve 30-4222

    KIBBLEWHITE Exhaust Valve 30-4222

    KIBBLEWHITE

    $31.01
    KIBBLEWHITE Exhaust Valve 30-4222Black Diamondâ„¢ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamondâ„¢ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U...
    09263049
    SKU:
    09263049
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    MODEL:
    BLACK DIAMONDâ„¢
    RIDING STYLE:
    STREET
    STEM DIAMETER IMPERIAL:
    0.2152'
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    TULIP ANGLE:
    29°
    HEAD DIAMETER METRIC:
    22.10 MM
    LENGTH IMPERIAL:
    3.475'
    $31.01
    Qty in Cart: 0
    Quantity:
    Price:
    $31.01
    Subtotal:
  • KIBBLEWHITE Valve Guide 60-60020-C

    KIBBLEWHITE Valve Guide 60-60020-C

    KIBBLEWHITE

    $5.57
    KIBBLEWHITE Valve Guide 60-60020-CAll valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.
    09263039
    SKU:
    09263039
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    OUTSIDE DIAMETER IMPERIAL:
    0.4170'
    PRODUCT NAME:
    VALVE GUIDE
    RIDING STYLE:
    STREET
    APPLICATION:
    EXHAUST
    INSIDE DIAMETER IMPERIAL:
    0.1931'
    MATERIAL:
    CAST IRON
    SIZE IMPERIAL:
    STANDARD
    UNITS:
    EACH
    $5.57
    Qty in Cart: 0
    Quantity:
    Price:
    $5.57
    Subtotal:
  • On Sale
    KIBBLEWHITE Intake Valve - Titanium - GSXR1000 60-61662T

    KIBBLEWHITE Intake Valve - Titanium - GSXR1000 60-61662T

    KIBBLEWHITE

    MSRP: $75.95
    Now: $49.00
    Was: $75.95
    KIBBLEWHITE Intake Valve Titanium GSXR1000 60-61662TTensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and...
    09263174
    SKU:
    09263174
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    HEAD DIAMETER METRIC:
    31.00 MM
    MATERIAL:
    TITANIUM
    TULIP ANGLE:
    25°
    APPLICATION:
    INTAKE
    PRODUCT NAME:
    VALVE
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    MODEL:
    TENSILITE®
    STEM DIAMETER IMPERIAL:
    0.1765'
    MSRP: $75.95
    Now: $49.00
    Was: $75.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $75.95
    Now: $49.00
    Was: $75.95
    Subtotal:
  • On Sale
    KIBBLEWHITE Valve Guide - Standard 60-61670

    KIBBLEWHITE Valve Guide - Standard 60-61670

    KIBBLEWHITE

    MSRP: $19.95
    Now: $13.00
    Was: $19.95
    KIBBLEWHITE Valve Guide Standard 60-61670Precision-machined from C630, Compatible with no-lead fuel and accept any type of valve-stem material, Provide maximum service with chromed valve stems, Feature a tapered nose design for maximum bearing service...
    09263175
    SKU:
    09263175
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    BASE COLOR:
    BROWN
    MATERIAL:
    C630 BRONZE
    PRODUCT NAME:
    VALVE GUIDE
    RIDING STYLE:
    STREET
    APPLICATION:
    INTAKE
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    COLOR/FINISH:
    BRONZE
    INSIDE DIAMETER IMPERIAL:
    0.1760'
    SIZE IMPERIAL:
    STANDARD
    OUTSIDE DIAMETER IMPERIAL:
    0.3773'
    MSRP: $19.95
    Now: $13.00
    Was: $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $19.95
    Now: $13.00
    Was: $19.95
    Subtotal:
  • On Sale
    KIBBLEWHITE Valve Spring Kit 40-41100

    KIBBLEWHITE Valve Spring Kit 40-41100

    KIBBLEWHITE

    MSRP: $705.95
    Now: $452.00
    Was: $705.95
    KIBBLEWHITE Valve Spring Kit 40-41100Designed to out-perform and outlast the factory valve springs, Kit features lightweight, high-strength CrSi valve springs,, H.T. steel base washers and titanium spring retainers, Complete kit, everything you need to...
    09263235
    SKU:
    09263235
    Availability:
    Ships Same Business Day
    Weight:
    1.60 LBS
    SPRING LIFT IMPERIAL:
    0.445'
    SPRING SEAT PRESSURE:
    INTAKE 50 LB, EXHAUST 44 LB
    UNITS:
    KIT
    SPRING LIFT:
    0,445'
    MATERIAL:
    TITANIUM
    PRODUCT NAME:
    SPRING KIT
    RIDING STYLE:
    STREET
    SPRING OPEN PRESSURE:
    162 LB
    MSRP: $705.95
    Now: $452.00
    Was: $705.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $705.95
    Now: $452.00
    Was: $705.95
    Subtotal:
  • Total: items /

Adding your products to cart

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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