Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
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
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Hot Cams Exhaust Camshaft for Suzuki DR-Z400E 2000-2008 2252-2E
HOT CAMS
$340.21If you're running a DR-Z400E and serious about extracting every bit of performance from your engine, a quality exhaust camshaft is non-negotiable. Hot Cams' 2252-2E delivers measurable gains in throttle response and power consistency across the RPM...09250694- SKU:
- 09250694
- Availability:
- Ships Same Business Day
- Weight:
- 1.14 LBS
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- EXHAUST LIFT METRIC:
- 9.07 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- EXHAUST DURATION IMPERIAL:
- 238°
- APPLICATION:
- EXHAUST
- TYPE:
- STAGE 2
$340.21 -
Hot Cams Stage 2 Intake Camshaft for KTM 250 SX-F 2011-2012 3227-2IN
HOT CAMS
$171.67The Hot Cams Stage 2 intake camshaft is engineered specifically for KTM 250 SX-F riders who demand peak horsepower and consistent power delivery at high RPMs. If you're pushing your 2011-2012 machine to its limits on the track, this cam's optimized valve...09250699- SKU:
- 09250699
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 253°
- INTAKE LIFT METRIC:
- 10.73 MM
- UNITS:
- EACH
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- RIDING STYLE:
- OFF-ROAD
$171.67Qty in Cart: 0Quantity:Price:$171.67Subtotal: -
Hot Cams 10mm Valve Shim Kit for KTM 1190 Adventure 2014-2016 HCSHIM31
HOT CAMS
$109.95Valve clearance directly impacts combustion efficiency, engine longevity, and power delivery—and the Hot Cams 10mm Valve Shim Kit gives you the precision adjustment needed to dial in your KTM 1190 Adventure's performance. Whether you're running increased...09250726- SKU:
- 09250726
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 5 PACK
- DIAMETER METRIC:
- 10.00 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
$109.95 -
Hot Cams Cam Chain for Honda CRF250R 2004-2009 and CRF250X 2004-2017 HC92RH2015104
HOT CAMS
$85.81A worn or failing cam chain compromises valve timing precision and can lead to catastrophic engine damage if it breaks. The HOT CAMS HC92RH2015104 delivers OEM-exceeding durability with heat-treated links that resist wear and maintain tight tolerances...09250761- SKU:
- 09250761
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BASE FINISH:
- RAW
- CHAIN SIZE:
- 92RH2015
- MATERIAL:
- STEEL
- MODEL:
- SILENT
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- RAW
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
$85.81 -
Hot Cams Cam Chain for KTM 450 SX-F 2007-2012 HC98XRH2015080
HOT CAMS
$51.95The OEM cam chain on your KTM 450 SX-F is a wear item that directly impacts engine reliability and performance. HOT CAMS' upgrade delivers heat-treated links that resist friction and impact better than stock, reducing the risk of chain stretch and...09250985- SKU:
- 09250985
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
- MATERIAL:
- STEEL
- MODEL:
- SILENT
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 98XRH2015
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- BASE FINISH:
- RAW
$51.95Qty in Cart: 0Quantity:Price:$51.95Subtotal: -
Hot Cams Cam Chain for Honda CRF100F 2004-2013 HCDID25H090
HOT CAMS
$43.41A worn or stock cam chain is a common failure point on high-mileage Honda CRF100F engines, leading to timing issues and reduced performance. The HOT CAMS HCDID25H090 replaces OEM specifications with heat-treated links that resist friction and impact,...09250989- SKU:
- 09250989
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MODEL:
- ROLLER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CHAIN
- BASE FINISH:
- RAW
- CHAIN SIZE:
- DID25H
- TYPE:
- CAM
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$43.41 -
Hot Cams Cam Chain for Honda TRX200 FourTrax 1990-1991 HCDID25H100
HOT CAMS
$57.19A worn or failing cam chain compromises valve timing and engine reliability—especially critical on high-mileage TRX200 builds. The HOT CAMS HCDID25H100 delivers OEM-exceeding durability with heat-treated links that resist stretch and wear, restoring...09250990- SKU:
- 09250990
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BASE FINISH:
- RAW
- CHAIN SIZE:
- DID25H
- RIDING STYLE:
- STREET
- TYPE:
- CAM
- PRODUCT NAME:
- CHAIN
- MODEL:
- ROLLER
$57.19 -
Hot Cams Exhaust Camshaft for Kawasaki KLX450R 2008-2009 2199-2E
HOT CAMS
$154.71If you're building a KLX450R engine for serious track duty, cam selection directly determines your power band characteristics and throttle response. The Hot Cams 2199-2E exhaust camshaft delivers measurable gains in mid-range and top-end power while...09250566- SKU:
- 09250566
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- EXHAUST LIFT METRIC:
- 9.91 MM
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- EXHAUST DURATION IMPERIAL:
- 250°
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
$154.71 -
Hot Cams Exhaust Camshaft for Yamaha YZ450F 2010-2013 4164-1EX
HOT CAMS
$321.95If you're running a YZ450F in competitive conditions, your stock exhaust camshaft is limiting your engine's potential across the RPM band. The Hot Cams 4164-1EX delivers measurable gains in torque and horsepower while maintaining the reliability demanded...09250568- SKU:
- 09250568
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- EXHAUST LIFT METRIC:
- 8.64 MM
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 1
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 249°
- UNITS:
- EACH
$321.95Qty in Cart: 0Quantity:Price:$321.95Subtotal: -
Hot Cams Exhaust Camshaft for Yamaha YZ450F 2010-2013 4166-2EX
HOT CAMS
$341.27The HOT CAMS Exhaust Camshaft 4166-2EX is engineered to unlock measurable gains in both torque and horsepower across your YZ450F's entire powerband. If you're running this bike in competitive racing or serious trail riding, this Stage 1/Stage 2 upgrade...09250570- SKU:
- 09250570
- Availability:
- Ships Same Business Day
- Weight:
- 1.02 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- EXHAUST DURATION IMPERIAL:
- 254°
- EXHAUST LIFT METRIC:
- 8.90 MM
- UNITS:
- EACH
$341.27 -
Hot Cams Stage 2 Intake Camshaft for 1996-2018 Kawasaki KLR650 2116-2IN
HOT CAMS
$289.95If you're running a KLR650, the stock camshaft is holding back your engine's potential. The Hot Cams Stage 2 Intake Camshaft delivers measurable gains in peak horsepower and throttle response without requiring valve spring upgrades or extensive machine...09250324- SKU:
- 09250324
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- INTAKE DURATION IMPERIAL:
- 235.75°
- INTAKE LIFT METRIC:
- 9.11 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- APPLICATION:
- INTAKE
$289.95Qty in Cart: 0Quantity:Price:$289.95Subtotal: -
Hot Cams Stage 2 Exhaust Camshaft for Kawasaki KLR650 1996-2018 2117-2E
HOT CAMS
$347.63If you're running a KLR650 and want measurable power gains across the entire RPM band, the Hot Cams Stage 2 Exhaust Camshaft is a bolt-on upgrade that delivers. This cam is engineered specifically for racing applications where peak horsepower matters,...09250325- SKU:
- 09250325
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 235.75°
- EXHAUST LIFT METRIC:
- 9.10 MM
- TYPE:
- STAGE 2
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- PRODUCT NAME:
- CAMSHAFT
$347.63 -
Hot Cams 8.9mm Valve Shim Kit for 2005-2018 KTM 250 SX-F HCSHIM00
HOT CAMS
$93.95Precise valve clearance is critical to maintaining peak performance and preventing costly engine damage on your 250 SX-F. Hot Cams' 8.9mm valve shim kit gives you the adjustment range needed to dial in optimal clearances after cam upgrades, high-mileage...09250332- SKU:
- 09250332
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- DIAMETER METRIC:
- 8.90 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SHIM KIT
- UNITS:
- 5 PACK
- TYPE:
- VALVE
$93.95 -
Hot Cams Stage 3 Camshaft for Honda CRF250R 2004-2009 1104-3
HOT CAMS
$475.89The HOT CAMS Stage 3 Camshaft transforms your CRF250R's power delivery by optimizing valve timing and lift across the entire RPM band—critical for competitive racing where mid-range responsiveness and top-end power separate winners from the field. This...09250269- SKU:
- 09250269
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- INTAKE DURATION IMPERIAL:
- 254°
- PRODUCT NAME:
- CAMSHAFT
- INTAKE LIFT METRIC:
- 8.61 MM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 261.5°
- EXHAUST LIFT METRIC:
- 8.13 MM
- TYPE:
- STAGE 3
- UNITS:
- EACH
$475.89 -
Hot Cams Stage 2 Intake Camshaft for Yamaha YZ450F 2003-2009 4089-2IN
HOT CAMS
$356.11Stock cam profiles limit your YZ450F's potential across the entire powerband. The Hot Cams Stage 2 Intake Camshaft delivers measurable gains in throttle response and mid-to-top-end power without requiring valve spring upgrades or extensive modification...09250276- SKU:
- 09250276
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- INTAKE DURATION IMPERIAL:
- 260°
- INTAKE LIFT METRIC:
- 8.89 MM
- TYPE:
- STAGE 2
$356.11 -
Hot Cams Honda CRF150R 2007-2021 Stage 1 Camshaft 1079-1
HOT CAMS
$386.85Stock camshaft profiles limit your CRF150R's potential—the Hot Cams Stage 1 unleashes measurable torque gains across the midrange without requiring valve spring upgrades or custom machine work. Whether you're prepping for competition or maximizing your...09250131- SKU:
- 09250131
- Availability:
- Ships Same Business Day
- Weight:
- 1.47 LBS
- EXHAUST DURATION IMPERIAL:
- 265°
- TYPE:
- STAGE 1
- INTAKE DURATION IMPERIAL:
- 238°
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- APPLICATION:
- INTAKE
- EXHAUST LIFT METRIC:
- 7.45 MM
- INTAKE LIFT METRIC:
- 8.00 MM
- UNITS:
- EACH
$386.85 -
Hot Cams Stage 2 Camshaft for Honda CRF150R 2007-2020 1080-2
HOT CAMS
$386.85If you're running a CRF150R in competitive racing or serious recreational riding, your stock camshaft is limiting your engine's potential across the entire RPM band. The Hot Cams Stage 2 delivers measurable gains in peak horsepower and mid-range power...09250132- SKU:
- 09250132
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
- INTAKE DURATION IMPERIAL:
- 254°
- APPLICATION:
- EXHAUST
- INTAKE LIFT METRIC:
- 8.70 MM
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- EXHAUST DURATION IMPERIAL:
- 273.5°
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- EXHAUST LIFT METRIC:
- 7.75 MM
- RIDING STYLE:
- OFF-ROAD
$386.85 -
Hot Cams Stage 1 Camshaft for Honda CRF250X 2004-2009 2012-2013 2015-2017 1039-1
HOT CAMS
$425.01If you're running a CRF250X and want measurable gains in low-to-mid range torque without tearing into your engine, the Hot Cams Stage 1 is your answer. This drop-in camshaft works with your existing valve springs and delivers real horsepower improvements...09250049- SKU:
- 09250049
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- INTAKE DURATION IMPERIAL:
- 244°
- INTAKE LIFT METRIC:
- 8.10 MM
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 1
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 250°
- EXHAUST LIFT METRIC:
- 8.10 MM
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
$425.01 -
Hot Cams Stage 1 Intake Camshaft for 2004-2009 Kawasaki KX250F 2004-2007 Suzuki RM-Z250 2041-1IN
HOT CAMS
$289.33If you're running a KX250F or RM-Z250 in competitive racing or serious trail riding, camshaft selection directly determines your power delivery and throttle response. The Hot Cams Stage 1 intake camshaft gives you a genuine upgrade path without the...09250050- SKU:
- 09250050
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- TYPE:
- STAGE 1
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 253°
- INTAKE LIFT METRIC:
- 9.14 MM
- UNITS:
- EACH
$289.33 -
Hot Cams Exhaust Camshaft for Kawasaki KX250F 2004-2010 2040-1E
HOT CAMS
$289.33If you're serious about KX250F performance, your stock exhaust cam is leaving horsepower on the table. The Hot Cams 2040-1E is purpose-built to unlock measurable gains in torque and peak power, giving you the edge in competitive racing and aggressive...09250051- SKU:
- 09250051
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- EXHAUST DURATION IMPERIAL:
- 244°
- EXHAUST LIFT METRIC:
- 7.98 MM
- TYPE:
- STAGE 1
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$289.33
