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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KIBBLEWHITE Intake Valve 30-33662
KIBBLEWHITE
$37.55Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U.S.A.09263286- SKU:
- 09263286
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH IMPERIAL:
- 3.280'
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 30.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- STEM DIAMETER IMPERIAL:
- 0.1766'
$37.55 -
KIBBLEWHITE Top End Service Kit 30-33700
KIBBLEWHITE
$660.02Kit includes all necessary parts for a complete top-end service/rebuild: pistons, piston rings, piston pins, gaskets, valves, and valve springs, Pistons fully machined from 2618 aluminum alloy with a performance skirt coating, Lightweight racing valve...09263289- SKU:
- 09263289
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- TOP END SERVICE KIT
$660.02 -
KIBBLEWHITE Top End Service Kit 60-61850
KIBBLEWHITE
$660.02Kit includes all necessary parts for a complete top-end service/rebuild: pistons, piston rings, piston pins, gaskets, valves, and valve springs, Pistons fully machined from 2618 aluminum alloy with a performance skirt coating, Lightweight racing valve...09263290- SKU:
- 09263290
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- TOP END SERVICE KIT
$660.02 -
KIBBLEWHITE Intake Valve Guide 82-82270
KIBBLEWHITE
$18.54Precision-machined guides, Manganese bronze guide material is softer than nickel aluminum bronze valve guides, Excellent heat conductivity which promotes long valve life, Guides can be easily reamed with a battery-operated or electric drill and finished...09263291- SKU:
- 09263291
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- MATERIAL:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4353'
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$18.54 -
KIBBLEWHITE Exhaust Valve Guide 82-82420
KIBBLEWHITE
$18.54Precision-machined guides, Manganese bronze guide material is softer than nickel aluminum bronze valve guides, Excellent heat conductivity which promotes long valve life, Guides can be easily reamed with a battery-operated or electric drill and finished...09263292- SKU:
- 09263292
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE GUIDE
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4353'
- APPLICATION:
- EXHAUST
- MATERIAL:
- BRONZE
- SIZE IMPERIAL:
- STANDARD
$18.54 -
On Sale
KIBBLEWHITE Valve Spring Kit 82-83300
KIBBLEWHITE
MSRP: $355.28Now: $228.00Was: $355.28Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond® valves feature one-piece construction and hard chrome stems, Spring sets...09263293- SKU:
- 09263293
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- APPLICATION:
- INTAKE
- SPRING LIFT IMPERIAL:
- 0.450'
- RIDING STYLE:
- UTV
- APPLICATION:
- EXHAUST
- SPRING OPEN PRESSURE:
- 181 LB
- TYPE:
- VALVE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT:
- 0,450'
- SPRING SEAT PRESSURE:
- 64 LB
- UNITS:
- KIT
MSRP: $355.28Now: $228.00Was: $355.28 -
On Sale
KIBBLEWHITE Valve Spring Kit 82-83350
KIBBLEWHITE
MSRP: $262.77Now: $168.00Was: $262.77Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond® valves feature one-piece construction and hard chrome stems, Spring sets...09263294- SKU:
- 09263294
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT:
- 0,450'
- TYPE:
- VALVE
- RIDING STYLE:
- UTV
- SPRING SEAT PRESSURE:
- 64 LB
- MATERIAL:
- HIGH TENSILE STEEL
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- SPRING LIFT IMPERIAL:
- 0.450'
- SPRING OPEN PRESSURE:
- 181 LB
MSRP: $262.77Now: $168.00Was: $262.77 -
KIBBLEWHITE Valve Spring Kit 82-83450
KIBBLEWHITE
$262.77Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond® valves feature one-piece construction and hard chrome stems, Spring sets...09263296- SKU:
- 09263296
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT:
- 0,450'
- TYPE:
- VALVE
- SPRING OPEN PRESSURE:
- 181 LB
- SPRING SEAT PRESSURE:
- 64 LB
- UNITS:
- KIT
- MATERIAL:
- HIGH TENSILE STEEL
- MATERIAL:
- VITON
- RIDING STYLE:
- UTV
- APPLICATION:
- INTAKE
- SPRING LIFT IMPERIAL:
- 0.450'
$262.77 -
KIBBLEWHITE Spring Kit - Steel 80-81700
KIBBLEWHITE
$327.95Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs, Compatible with boosted or turbocharged applications, CNC-machined titanium retainers and Cr-Si dual springs provide valvetrain control at high...09263206- SKU:
- 09263206
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- SPRING OPEN PRESSURE:
- 167 LB
- RIDING STYLE:
- UTV
- SPRING LIFT IMPERIAL:
- 0.445'
- APPLICATION:
- EXHAUST
- SPRING LIFT:
- 0,445'
- TYPE:
- VALVE
- PRODUCT NAME:
- SPRING KIT
- SPRING SEAT PRESSURE:
- 53 LB
- UNITS:
- KIT
$327.95 -
KIBBLEWHITE Cylinder Head Service Kit 30-33430
KIBBLEWHITE
$466.23Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive...09263223- SKU:
- 09263223
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- C630 BRONZE
- MATERIAL:
- TITANIUM
- MODEL:
- BLACK DIAMOND™
- SPRING SEAT PRESSURE:
- 45 LB
- RIDING STYLE:
- OFF-ROAD
- SPRING LIFT IMPERIAL:
- 0.350'
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CYLINDER HEAD SERVICE KIT
- SPRING LIFT:
- 0,350'
- SPRING OPEN PRESSURE:
- 143 LB
$466.23 -
KIBBLEWHITE Cylinder Head Service Kit 30-33450
KIBBLEWHITE
$412.17Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive...09263224- SKU:
- 09263224
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- SPRING LIFT IMPERIAL:
- 0.440'
- SPRING SEAT PRESSURE:
- INTAKE 40 LB, EXHAUST 70 LB
- MATERIAL:
- TITANIUM
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- CYLINDER HEAD SERVICE KIT
- SPRING LIFT:
- 0,440'
- SPRING OPEN PRESSURE:
- INTAKE 147 LB, EXHAUST 203 LB
- MATERIAL:
- C630 BRONZE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$412.17 -
KIBBLEWHITE Cylinder Head Service Kit 30-33490
KIBBLEWHITE
$420.90Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive...09263226- SKU:
- 09263226
- Availability:
- Ships Same Business Day
- Weight:
- 1.96 LBS
- APPLICATION:
- EXHAUST
- SPRING OPEN PRESSURE:
- 185 LB
- SPRING SEAT PRESSURE:
- 70 LB
- RIDING STYLE:
- OFF-ROAD
- SPRING LIFT IMPERIAL:
- 0.400'
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- CYLINDER HEAD SERVICE KIT
- RIDING STYLE:
- STREET
- SPRING LIFT:
- 0,400'
- MATERIAL:
- C630 BRONZE
$420.90 -
KIBBLEWHITE Cylinder Head Service Kit 82-83210
KIBBLEWHITE
$668.26Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive...09263227- SKU:
- 09263227
- Availability:
- Ships Same Business Day
- Weight:
- 2.61 LBS
- MATERIAL:
- C630 BRONZE
- PRODUCT NAME:
- CYLINDER HEAD SERVICE KIT
- SPRING OPEN PRESSURE:
- 205 LB
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- 0.435'
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- SPRING LIFT:
- 0,435'
- SPRING SEAT PRESSURE:
- 80 IB
$668.26 -
KIBBLEWHITE Cylinder Head Service Kit 82-83220
KIBBLEWHITE
$652.03Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive...09263228- SKU:
- 09263228
- Availability:
- Ships Same Business Day
- Weight:
- 2.56 LBS
- MATERIAL:
- C630 BRONZE
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- CYLINDER HEAD SERVICE KIT
- SPRING LIFT:
- 0,435'
- SPRING OPEN PRESSURE:
- 205 LB
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- SPRING SEAT PRESSURE:
- 80 IB
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- 0.435'
$652.03 -
KIBBLEWHITE Valve Spring Kit 82-82550
KIBBLEWHITE
$232.66Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond® valves feature one-piece construction and hard chrome stems, Spring sets...09263229- SKU:
- 09263229
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- MATERIAL:
- VITON
- SPRING LIFT:
- 0,435'
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- 0.435'
- SPRING OPEN PRESSURE:
- 205 LB
- TYPE:
- VALVE
- PRODUCT NAME:
- SPRING KIT
- SPRING SEAT PRESSURE:
- 80 IB
- UNITS:
- KIT
$232.66 -
KIBBLEWHITE Cylinder Head Service Kit 82-83240
KIBBLEWHITE
$652.03Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive...09263230- SKU:
- 09263230
- Availability:
- Ships Same Business Day
- Weight:
- 2.61 LBS
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- SPRING OPEN PRESSURE:
- 205 LB
- SPRING SEAT PRESSURE:
- 80 IB
- MATERIAL:
- C630 BRONZE
- MATERIAL:
- STEEL
- SPRING LIFT IMPERIAL:
- 0.435'
- APPLICATION:
- INTAKE
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- CYLINDER HEAD SERVICE KIT
- RIDING STYLE:
- ATV
- SPRING LIFT:
- 0,435'
$652.03 -
KIBBLEWHITE Cylinder Head Service Kit 60-61790
KIBBLEWHITE
$335.14Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive...09263232- SKU:
- 09263232
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- 0.440'
- MATERIAL:
- C630 BRONZE
- MODEL:
- WHITE DIAMOND™
- SPRING OPEN PRESSURE:
- 171 LB
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- CYLINDER HEAD SERVICE KIT
- RIDING STYLE:
- ATV
- SPRING LIFT:
- 0,440'
- SPRING SEAT PRESSURE:
- 57 LB
$335.14 -
KIBBLEWHITE Valve Spring Kit - Beehive 91-91300
KIBBLEWHITE
$369.95Progressively wound springs using Kobe super-clean, chrome silicon-based wire that is heat treated and shot peened, Tight-tolerance, FEA-designed hardened steel Posi-Loc™ style upper retainers to ensure correct assembly height and resist keeper "pull...09263317- SKU:
- 09263317
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- APPLICATION:
- EXHAUST
- SPRING OPEN PRESSURE:
- 161 LB
- TYPE:
- VALVE
- STYLE:
- OVATE WIRE BEEHIVE
- UNITS:
- KIT
- MATERIAL:
- STEEL
- RIDING STYLE:
- UTV
- SPRING LIFT IMPERIAL:
- 0.350'
- SPRING SEAT PRESSURE:
- 51 LB
- APPLICATION:
- INTAKE
- COLLAR MATERIAL:
- STEEL
- PRODUCT NAME:
- SPRING KIT
$369.95 -
KIBBLEWHITE Valve Guide - Standard - Intake/Exhaust 91-91320M
KIBBLEWHITE
$14.36All 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.09263318- SKU:
- 09263318
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.1955'
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- OUTSIDE DIAMETER IMPERIAL:
- 0.3565'
- RIDING STYLE:
- OFF-ROAD
$14.36 -
KIBBLEWHITE Intake Valve - Standard 91-91312H
KIBBLEWHITE
$37.55White Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel or Inconel-751, Electroplated with a 360º anode, to produce an even coat of the highest grade hard chrome finish, Made in the U.S.A.09263319- SKU:
- 09263319
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE
- LENGTH IMPERIAL:
- 3.305'
- SIZE METRIC:
- STANDARD
- STEM DIAMETER IMPERIAL:
- 0.1960'
- RIDING STYLE:
- UTV
- HEAD DIAMETER METRIC:
- 29.01 MM
- MODEL:
- WHITE DIAMOND™
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 15°
$37.55
