Engines meeting these standards now produce only 3% of the HC emissions that previously unregulated engines did. Because both scientific studies and U. S. National Forest Service personnel have identified unregulated Off Road Vehicles ORVs as the source of major detrimental impacts on national forests, the U. S. Forest Service is currently engaged in the Travel Management Process, wherein individual forests are restricting all off road motorized travel to approved trails and roads. This is in contrast to its previously allowed, unregulated cross country travel across all national forest lands, except for specifically designated wilderness areas. Although ORVs had been identified 30 years ago as a threat to wild ecosystems by the Forest Service, only after pressure by an unlikely alliance of environmentalists, private landowners, hunters, ranchers, fishermen, quiet recreationists and forest rangers themselves who identified ORVs as a "significant law enforcement problem" in national forests. has action been taken. The Travel Management Rule was initiated in 2004; completion is expected in 2010. Championship Mud Racing/CMR saw its infancy in 2006 as leaders of the ATV industry recognized a need for uniformity of classes and rules of various local mud bog events.

30mm Carburetor Cable Choke PZ30 Carb 200cc 250cc Dirt Bike ATV Taotao SunL JCL Carburetor PZ30 30mm Carb 200cc 250cc Cable Choke Dirt Bike ATV Taotao SunL JCL PZ30 Carburetor Cable Choke Dirt Bike ATV Taotao SunL JCL 30mm Carb 200cc 250cc 30mm PZ30 Carburetor Carb 200cc 250cc Cable Choke Dirt Bike ATV Taotao SunL JCL Carburetor Carb For 250cc to 300cc engine For Yamaha Honda ATV UTV YZ80 YZ85 30mm Acceleration Carburetor Carb Kits For PZ30 200 250cc Dirt Bike ATV Replaces Carburetor & Intake Manifold & Air Filter Hose For 250cc ATV QUAD ATV250 JS250 250cc ATV QUAD ATV250 JS250 Carburetor W/ Intake Manifold & Air Filter Hose PZ30 Carburetor Carb Cable Choke Dirt Bike ATV Taotao SunL JCL 30mm 250cc 200cc Carburetor Carb Flange Manifold Intake Adapter 30mm Fit 200cc 250cc ATV Quad CL Mikuni VM26 30mm Carburetor Throttle Grip 200 250cc Taotao Apollo ATV Quad Pit B 30mm Carburetor PZ30 Carb 200cc 250cc Cable Choke For Dirt Bike ATV Taotao/SunL 42mm Air Filter For PZ30 Carburetor CG200-250cc Engine ATV Dirt Bike CG200cc/CG250cc/ATV/Kart/JQ109 Carburetor 30mm Intake Manifold Pipe CG 200-250cc 30mm Carburetor PZ30 Carb 200cc 250cc Cable Choke For Dirt Bike ATV Taotao/SunL 30mm PZ30 Carburetor Fits For ATV Quad 200cc 250cc Engine Dirt Bike Replaces Carburetor For 4 Stoke 50CC 110CC 125CC 150CC 200CC 250CC 500CC 800CC ATV Quad 4-stroke Carburetor PZ27mm Fit For 125cc 150/200cc 250cc 300cc ATV Bike Go Karts Vacuum Fuel Gas Pump Valve Switch Scooter Moped Gokart GY6 ATV 150 250CC Petcock Zinc alloy Carburetor Fit For Honda Elite CF250cc ATV,Go Kart,Moped,Scooter New 30mm ATV Carburetor Fit For Honda ELITE CH250 1985-1988 CF250cc Scooter Go Kart Vacuum Fuel Pump & Filter for GY6 50CC 125CC 150CC 250CC Scooters ATVs Go Karts Carburetor Carb Flange Manifold Intake Adapter 30mm For 200cc 250cc ATV Quad A Automotive PZ30 30mm Carburetor Fit For TaoTao ATV Dirt 200cc 250cc Carb 30mm PZ30 Hand Choke Carburetor for 4-Stroke 125 150 200 250cc Dirt Bike ATV New 4-stroke Carburetor PZ27mm For 125cc 150/200cc 250cc 300cc ATV Bike Go Karts CN Carburetor Carb Flange Manifold Intake Adapter 30mm For 200cc 250cc ATV Quad S PZ30 Carburetor Fit For 175/200/250cc ATV Quad 4 Wheeler Dirt Bike Carb 30mm 30mm Carburetor Cable Choke PZ30 Carb 200cc 250cc Dirt Bike ATV Taotao SunL JCL Carburetor Carb Flange Manifold Intake Adapter 30mm Fits 200cc 250cc ATV Quad GY6 ATV 50-250CC Vacuum Fuel Gas Pump Valve Switch Petcock Scooter Moped Gokart Double Twin Carb Carby Carburetor 200cc 250cc 300cc Farm Quad Gokart ATV Buggy PZ27 Carburetor 150cc 200cc 250cc ATV Go Kart Dirt Bike w/ Air Filter [B8]38F 4-stroke Carburetor PZ27mm Fit For 125cc 150/200cc 250cc 300cc ATV Bike Go Karts 4-stroke Carburetor PZ27mm For 125/150cc 200cc 250cc 300cc ATV Bike Go Karts CA New Carburetor Intake Manifold For JS250 Jianshe 250cc ATV Quad F15-701000-0 Carburetor Carb Choke Fit For Honda ELITE CH250 85-88 CF250cc ATV Go Kart Moped PZ27 Carburetor 27mm Carb 150/200/250cc Taotao SunL Roketa Peace Baja ATV Carby Motorcycle Carburetor PD30J For ATV Engine 250cc Honda CN250 CF250 GY6 250 4X4 4-stroke Carburetor PZ27mm Fit For 125cc 150/200cc 250cc 300cc ATV Bike Go Karts Carburetor Carb Flange Manifold Intake Adapter 30mm For 200cc 250cc ATV Quad Carburetor Carb Flange Manifold Intake Adapter 30mm For 200cc 250cc ATV Quad