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Engine Rebuilding Process
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Tech Center
Instructions
Technical Documents
Rebuild Process & Shipping
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Products
2-Stroke Engine
2-Stroke Engine
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Vortex
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Duncan Racing International
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4-Stroke Engine
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4-Stroke Bolt-on Kits
4-Stroke Engine Kits
4-Stroke Pistons
4-Stroke Porting & Valve Seat Cut
4-Stroke Pro Flow Air Cleaner Kits
4-Stroke Specialty Products
Big Bore Kits
Camshafts & Valve Springs
Carburetors - Keihin 4-Stroke
HP4 Valve Train Kits UTV
HP4 Valve Train Kits-ATV
PC 4000 Power Cylinders
CALL FOR DETAILS/AVAILABILITY
Honda TRX 450R HP4 Valve Train Kit
$0.00
CALL FOR DETAILS/AVAILABILITY
Yamaha YFZ 450R (EFI) HP4 Valve Train Kit
$0.00
CALL FOR DETAILS/AVAILABILITY
Suzuki LT-R450 HP4 Valve Train Kit
$0.00
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Yamaha YFZ 450 HP4 Valve Train Kit '04-'09
$0.00
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Yamaha Raptor 700 HP4 Valve Train Kit
$0.00
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Yamaha Raptor 660 HP4 Valve Train Kit
$0.00
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Honda 400EX HP4 Valve Train Kit
$0.00
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Yamaha Raptor 250 HP4 Valve Train Kit
$0.00
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Suzuki LTZ 400- Kawasaki KFX 400 HP4 Valve Train Kit
$0.00
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Warrior/Wolverine/Raptor 350 HP4 Valve Train Kit
$0.00
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Honda 700XX HP4 Valve Train Kit
$0.00
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Honda 300 EX HP4 Valve Train Kit
$0.00
Honda TRX 450R ('04-'05) Pro Flow Air Cleaner Kit
from $24.95
Honda TRX 450R ('06-'16) Pro Flow Air Cleaner Kits
from $24.95
Suzuki LTR 450 Pro Flow Air Cleaner Kit
from $24.95
Pro Flow Air Cleaner Kit Yamaha YFZ 450
from $24.95
Yamaha Raptor 700 Pro Flow Air Cleaner Kit
from $45.00
Yamaha Raptor 660 Pro Flow Air Cleaner Kit
from $24.95
Pro Flow Air Cleaner Kit Yamaha Raptor 250
from $45.00
Pro Flow Air Cleaner Kit LTZ/KFX 400
from $24.95
CALL FOR DETAILS/AVAILABILITY
Pro Flow Air Cleaner Kit Yamaha Raptor 350
from $99.95
Pro Flow Air Cleaner Kit Honda 700xx
from $0.00
Pro Flow Air Cleaner Kit Honda TRX 400EX
from $24.95
Yamaha Warrior Pro Flow Air Cleaner Kit
from $24.95
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HD 4-Stroke Valve Springs
$0.00
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Shortened Bronze Valve Guides
$29.95
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Honda TRX 450R Camshafts
$699.00
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Suzuki LT-R450 Hi Performance Camshafts
$699.95
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Yamaha YFZ 450/YFZ 450R Hi Performance Camshafts
$999.95
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Yamaha Raptor 700 Camshafts
$499.95
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Yamaha Raptor 660 Camshafts
$0.00
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Honda 700XX Camshafts
$0.00
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Yamaha Raptor 250 Camshafts
$0.00
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Honda 400EX Camshafts
$499.00
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Suzuki LTZ400 - Kawasaki KFX 400 Camshafts
$549.00
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Honda 300EX Camshafts
$0.00
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Yamaha Warrior-Wolverine Camshafts
$0.00
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Polaris RZR 900 HP4 Valve Train Kit
$0.00
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Honda TRX 450R DRI 470/478cc Big Bore Kits
$0.00
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Honda TRX450 ('06-'13) DRI National 500cc Kit
$0.00
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Suzuki LT-R450 "475cc" Big Bore Kit
$0.00
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Yamaha YFZ 450R Aluminum Overflow Bottle
$149.00
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YAM YFZ450R ZIP Hi Capacity Oil Cover w/Window
$249.00
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Yamaha YFZ 450 ('04-'06) Oiler Upgrade Kit
$649.00
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Custom AirBox Lid - Enduro Honda 700XX
$139.00
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Honda TRX 450R DRI 470cc National Engine Kit
$0.00
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Honda TRX 450R ('04- '05) DRI 515cc National Engine Kit
$0.00
Yamaha YFZ 450R Hi Performance Bolt-on Kits
from $1,549.00
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Honda TRX 450R ('06-'16) DRI National 500/510/525cc Kit
$0.00
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Suzuki LTR 450 DRI 475cc National Engine Kit
$0.00
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Yamaha YFZ 450 DRI 450/460cc National Engine Kit
$0.00
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Yamaha Raptor 700 DRI 715/727cc National Engine Kit
$0.00
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Yamaha Raptor 700 DRI 740cc National Engine Kit
$0.00
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Yamaha Raptor 250/280cc National Engine Kit
$0.00
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Honda 400EX DRI 440 National Kit
$0.00
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Yamaha Raptor 660 DRI 660cc National Engine Kit
$0.00
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Suz LTZ / Kaw KFX 400 DRI 435cc National Engine Kit
$0.00
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Suz LTZ / Kaw KFX 400 DRI 470cc National Engine Kit
$0.00
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Yamaha Warrior DRI National Engine Kit
$0.00
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Honda TRX 300EX DRI National Engine Kit
$0.00
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Honda TRX450R Bolt-on Kits
from $799.00
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Suzuki LT R450 ('06-'10) Bolt-on Kits
$0.00
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Yamaha Raptor 700 Bolt-on Kit
$0.00
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Yamaha Raptor 660 Bolt-on Kit
$0.00
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Honda 400EX Bolt-on Kit
$0.00
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Yamaha YFZ 450 ('04-'09 Carb Model) Bolt-on Kits
$0.00
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Yamaha Raptor 250 Bolt-On Kit
$0.00
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Kawasaki KFX 450 Bolt-on Kit
$0.00
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Suzuki LTZ 400/Kawasaki KFX400 Bolt-on Kit
$0.00
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Yamaha Warrior Bolt-on Kit
$0.00
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Yamaha Raptor 350 Bolt-on Kit
$0.00
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Honda 700XX Bolt-on Kit
$0.00
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Honda 250EX Bolt-on Kit
$0.00
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Honda 250X/300EX Bolt-on Kit
$0.00
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Keihin FCR Carburetor for '04-'16 Honda TRX 450R
$749.00
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Polaris RZR 800 HP4 Valve Train Kit
$0.00
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Suzuki LTR 450 DRI 500cc Big Bore Kit
$0.00
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Raptor 700 DRI 715/727cc Big Bore Kit
$0.00
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Yamaha Rhino 700 HP4 Valve Train Kit
$0.00
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Yamaha YFZ 450 (Carb) DRI 470/480 Big Bore Kit
$0.00
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Yamaha YFZ 450 (Carb) DRI 500cc Big Bore Kit
$0.00
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DRI 4-Stroke Porting & Valve Seat Machining
$595.00
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JE 4-Stroke Forged Piston Kits
$0.00
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PC 4000 4-Stroke Power Cylinder for 400EX
$1,095.00
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Oversized Radiator
$525.00
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700XX Oversized Radiator with Dual Fans (Fans Included)
$799.00
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CBR Radiators
$0.00
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Yamaha Raptor 250 DRI 280cc Big Bore Kit
$0.00
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Yamaha Rhino 660 HP4 Valve Train Kit
$0.00
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Oil Cooler Kit '06-'14 Honda TRX 450ER
$1,095.00
CALL FOR DETAILS/AVAILABILITY
Honda 400EX-440cc Big Bore Kit
$399.00