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 RM-Z250 2016-2020 2309-1E
HOT CAMS
$289.95If you're running a 2016-2020 Suzuki RM-Z250 and want measurable gains in torque and horsepower, the Hot Cams Exhaust Camshaft 2309-1E is engineered to deliver across the entire RPM band. This precision-machined component swaps directly into your engine,...09251191- SKU:
- 09251191
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- EXHAUST LIFT METRIC:
- 8.38 MM
- UNITS:
- EACH
- EXHAUST DURATION IMPERIAL:
- 239°
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 1
$289.95 -
Hot Cams Stage 2 Intake Camshaft for 2016-2022 KTM 250 SX-F 3308-2IN
HOT CAMS
$679.95Stock valve timing limits your 250 SX-F's potential across the entire RPM range. The Hot Cams Stage 2 intake camshaft unlocks measurable horsepower and torque gains with a simple bolt-on installation that works with your existing valve springs. If you're...09251190- SKU:
- 09251190
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STAGE 2
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 253°
- INTAKE LIFT METRIC:
- 11.63 MM
- PRODUCT NAME:
- CAMSHAFT
$679.95 -
Hot Cams Exhaust Camshaft for 2016-2022 KTM 250 SX-F 3307-E
HOT CAMS
$629.95If you're running a 2016-2022 KTM 250 SX-F and serious about extracting every bit of performance from your motor, cam selection directly determines your power band characteristics and throttle response. The HOT CAMS 3307-E exhaust camshaft gives you...09251189- SKU:
- 09251189
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- EXHAUST DURATION IMPERIAL:
- 238.30°
- TYPE:
- STAGE 1
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- EXHAUST LIFT METRIC:
- 10.51 MM
$629.95 -
Hot Cams Stage 1 Intake Camshaft for 2016-2022 KTM 250 SX-F 3306-1IN
HOT CAMS
$726.95If you're serious about extracting more mid-range torque and throttle response from your 250 SX-F, the Hot Cams Stage 1 Intake Camshaft delivers measurable gains without requiring valve spring upgrades or extensive machine work. This drop-in camshaft...09251188- SKU:
- 09251188
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 242°
- INTAKE LIFT METRIC:
- 10.86 MM
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 1
$726.95 -
Hot Cams Camshaft Stage 1 Honda CRF250R 2016-2017 1318-1
HOT CAMS
$403.95If you're serious about extracting every bit of performance from your CRF250R, the HOT CAMS Stage 1 Camshaft is engineered to deliver measurable gains in mid-range torque and throttle responsiveness. This drop-in upgrade bridges the gap between stock and...09251183- SKU:
- 09251183
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- EXHAUST LIFT METRIC:
- 8.84 MM
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 266.26°
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- TYPE:
- STAGE 1
- INTAKE DURATION IMPERIAL:
- 241.61°
- INTAKE LIFT METRIC:
- 9.27 MM
- PRODUCT NAME:
- CAMSHAFT
$403.95 -
Hot Cams Cam Chain 2004-2005 Honda TRX450R HC92RH2015114
HOT CAMS
$57.95A worn or failing cam chain directly compromises valve timing precision, leading to power loss, rough idle, and potential engine damage. The HOT CAMS HC92RH2015114 delivers heat-treated durability and silent operation that exceeds OEM specs, making it...09250759- SKU:
- 09250759
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MODEL:
- SILENT
- RIDING STYLE:
- STREET
- CHAIN SIZE:
- 92RH2015
- PRODUCT NAME:
- CHAIN
- BASE FINISH:
- RAW
- TYPE:
- CAM
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$57.95 -
Hot Cams Cam Chain for Yamaha WR250R 2008-2020 HC98XRH2010118
HOT CAMS
$67.95A worn or degraded cam chain compromises valve timing precision and can lead to catastrophic engine damage if it fails entirely. The HOT CAMS HC98XRH2010118 replaces your OEM chain with heat-treated links that resist friction and impact far better than...09250757- SKU:
- 09250757
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BASE FINISH:
- RAW
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CHAIN
- CHAIN SIZE:
- 98XRH2010
- MODEL:
- SILENT
- TYPE:
- CAM
$67.95 -
Hot Cams Cam Chain for Honda CRF450R 2002-2008 and CRF450X 2005-2017 HC92RH2015112
HOT CAMS
$57.95The cam chain is a critical component that directly impacts your CRF450's reliability and engine longevity. Over time, OEM chains wear and stretch, causing timing issues and potential catastrophic engine damage. The HOT CAMS HC92RH2015112 delivers a...09250756- SKU:
- 09250756
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 92RH2015
- PRODUCT NAME:
- CHAIN
- BASE FINISH:
- RAW
- COLOR/FINISH:
- RAW
- UNITS:
- EACH
- MODEL:
- SILENT
- TYPE:
- CAM
$57.95 -
HOT CAMS Cam Chain HC82RH2010128
HOT CAMS
$97.95A failing cam chain doesn't just compromise performance—it threatens catastrophic engine damage. The HOT CAMS HC82RH2010128 silent chain delivers the reliability of OEM specifications with engineering that exceeds factory tolerances, keeping your valve...09250755- SKU:
- 09250755
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- BASE FINISH:
- RAW
- CHAIN SIZE:
- 82RH2010
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MODEL:
- SILENT
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
$97.95 -
Hot Cams Exhaust Camshaft for Kawasaki KX250F 2004-2010 2068-2E
HOT CAMS
$294.95If you're running a KX250F and serious about extracting maximum performance from your engine, the Hot Cams 2068-2E Exhaust Camshaft is essential. This Stage 1/Stage 2 design delivers measurable gains in throttle response and mid-range torque while...09250149- SKU:
- 09250149
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 248°
- UNITS:
- EACH
- EXHAUST LIFT METRIC:
- 8.25 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
$294.95 -
Hot Cams Stage 2 Intake Camshaft for Kawasaki KX250F 2004-2010 2067-2IN
HOT CAMS
$294.95The Hot Cams Stage 2 intake camshaft is engineered to unlock peak horsepower across your KX250F's RPM range, delivering the high-speed performance gains serious racers demand. If you're running stock cams, you're leaving power on the table—this Stage 2...09250148- SKU:
- 09250148
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- TYPE:
- STAGE 2
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 258°
- INTAKE LIFT METRIC:
- 9.14 MM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CAMSHAFT
$294.95 -
Hot Cams Stage 3 Camshaft for Honda TRX400EX 1999-2008 1051-3
HOT CAMS
$383.95The HOT CAMS Stage 3 Camshaft transforms your TRX400EX into a focused racing machine by delivering aggressive valve timing that maximizes both low-end torque and top-end horsepower. Stock camshafts compromise across the RPM band—this one doesn't. Drop it...09250083- SKU:
- 09250083
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- EXHAUST LIFT METRIC:
- 9.00 MM
- INTAKE DURATION IMPERIAL:
- 262°
- INTAKE LIFT METRIC:
- 9.10 MM
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- EXHAUST DURATION IMPERIAL:
- 257°
- APPLICATION:
- EXHAUST
- TYPE:
- STAGE 3
$383.95 -
Hot Cams Stage 2 Camshaft for Honda CRF250R 2004-2009 1139-2
HOT CAMS
$415.95If you're running a CRF250R in competition or looking to unlock measurable performance gains on the track, camshaft selection directly impacts your power delivery and throttle response. The Hot Cams Stage 2 delivers a measurable bump in peak horsepower...09250082- SKU:
- 09250082
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- EXHAUST LIFT METRIC:
- 8.35 MM
- PRODUCT NAME:
- CAMSHAFT
- INTAKE LIFT METRIC:
- 8.40 MM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 267°
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- INTAKE DURATION IMPERIAL:
- 252°
- TYPE:
- STAGE 2
$415.95 -
Wossner Top End Bearing Kawasaki KX 500 1988-2004 N1052
WOSSNER
$18.50Top-end bearings are critical wear items in high-revving two-stroke engines, and a worn bearing will quickly degrade engine efficiency and create catastrophic damage if left unaddressed. The Wossner N1052 is engineered to OEM specifications for the...09240463- SKU:
- 09240463
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH METRIC:
- 24.8 MM
- PRODUCT NAME:
- BEARING
- TYPE:
- TOP END
- INSIDE DIAMETER METRIC:
- 19 MM
- OUTSIDE DIAMETER METRIC:
- 24 MM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- CONNECTING ROD
- UNITS:
- EACH
$18.50Qty in Cart: 0Quantity:Price:$18.50Subtotal: -
Wossner Top End Bearing 18x22x23.5 mm Kawasaki KX250 2002-2007 N1049
WOSSNER
$18.50The Wossner Top End Bearing is a critical wear item that directly impacts engine reliability and performance in your KX250. Over time, original bearings degrade under the intense heat and friction of high-RPM operation, leading to increased play, noise,...09240462- SKU:
- 09240462
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 18 MM
- PRODUCT NAME:
- BEARING
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- LENGTH METRIC:
- 23.5 MM
- TYPE:
- TOP END
- UNITS:
- EACH
- OUTSIDE DIAMETER METRIC:
- 22 MM
$18.50 -
Wossner Top End Bearing for Yamaha YZ125 2005-2022 N1047
WOSSNER
$18.50The top end bearing is critical to maintaining proper crankshaft-to-connecting rod alignment and minimizing friction at peak RPM—neglecting this component leads to catastrophic engine failure. The Wossner N1047 is engineered to OEM tolerances for the...09240461- SKU:
- 09240461
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH METRIC:
- 17.3 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 15 MM
- TYPE:
- TOP END
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- OUTSIDE DIAMETER METRIC:
- 19 MM
$18.50 -
Wossner Top End Bearing for 1998-2022 KTM 65 SX N1037
WOSSNER
$18.50The top end bearing on your KTM 65 SX takes a beating during aggressive riding and racing—worn bearings lead to increased friction, excessive play, and premature piston wear. Wossner's precision-engineered top end bearing is built to OEM specifications...09240460- SKU:
- 09240460
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- LENGTH METRIC:
- 16.3 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- APPLICATION:
- CONNECTING ROD
- INSIDE DIAMETER METRIC:
- 12 MM
- UNITS:
- EACH
- OUTSIDE DIAMETER METRIC:
- 15 MM
$18.50 -
HOT RODS Crank Bearings K067
HOT RODS
$165.95A crankshaft is only as reliable as the bearings supporting it. The HOT RODS K067 crank bearing kit ensures precise fitment and consistent oil pressure across all main bearing journals, eliminating play that compromises engine stability and longevity...09240234- SKU:
- 09240234
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$165.95 -
HOT RODS Crank Bearings K066
HOT RODS
$118.95A quality crankshaft is only as reliable as the bearings supporting it. The HOT RODS K066 crank bearing kit delivers precision-engineered main bearing and seal components designed to handle the loads and RPM demands of high-performance engines. Whether...09240233- SKU:
- 09240233
- Availability:
- Ships Same Business Day
- Weight:
- 1.28 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$118.95 -
HOT RODS Crank Bearings K065
HOT RODS
$118.95A crankshaft assembly is only as reliable as its bearing system. The HOT RODS K065 Crank Bearings are precision-engineered main bearing and seal kits designed to work seamlessly with HOT RODS crankshaft assemblies, ensuring proper load distribution,...09240232- SKU:
- 09240232
- Availability:
- Ships Same Business Day
- Weight:
- 1.07 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BALL
$118.95
