Quads

 

Services

Honda TRX250R

Arlan has built his reputation as a world renowned engine builder with the TRX250R. These kits are famous for putting out big horesepower while still having the low-end grunt that is critical for acceleration and ridability. With the help of ATV Greats such as Gary Denton, Barry Hawk, and Bill Ballance, Arlan has developed engine packages for all types of racing and riding. With 15 major National Championships as well as 3 All-Japan championships claimed on Arlan Lehman built 250R engines, you can be sure that you are getting a World Class Honda engine. Check out the details below on these power products for the Honda TRX250R.

Performance Products

Carburetors: For larger displacement engine kits, we suggest running Keihin 38mm Air Striker or 39mm PWK Carbs for optimum performance.

Exhaust System: Standard Bore LRD Exhaust: This adjustable pipe is designed for modified performance engines. Utilizing a slip-fit adjustable design, riders can fine tune the powerband either for more bottom end, midrange, or top-end. Use the Big-Bore LRD Exhaust for engines over 310cc.

Reeds : Utilizing the Boyesen RAD 02B reed cage maximizes surface area and matches to the carburetors above for maximum performance.

Replacement Pistons: We have pistons for OEM cylinders, OEM Big-Bores, NIKS Cylinders, and more...Call us today and let us know what you need.

Replacement Crankshafts: HotRods stock stroke or +4mm stroker cranks come complete with HotRods connecting rods, top-end bearings, and crankshaft webs.

Performance Services & Engine Kits

Head Modification : We mill the cylinder head for optimized combustion and increased compression. We can also smooth out pitting from previous detonation.

Cylinder Porting : Each cylinder is ported to match the Rider's preferences. We optimize port shapes and timing to deliver significant power upgrades and throttle response.

300 Re-Sleeve Kit : This 72mm Big Bore kit on the OEM cylinder is one of the best performance values going. We install our 227 Brinell Hardness sleeve for strength. We mill and re-shape the head then port the cylinder to match your riding style. The result is an impressive 22hp over stock when using the LRD exhaust system. To improve cooling and reliability, we seal the head with high pressure Viton O-rings. This eliminates head gasket failures and increases cooling capacity by removing the heat barrier posed by conventional head gaskets.

LED / NIKS 300: This kit has potential for high-horsepower! We maximize the port area and optimize the port timing for your type of riding. The head is milled to our latest chamber configurations. We often get calls from people who have purchased this kit from other engine builders and are dissapointed. We offer upgrade kits for those cylinders as well.

LED 350 Powervalve: We build the 350PV cylinder to the same standards as we do the 250cc kits. This is the ultimate kit for big horsepower and gobs of torque. The low end is improved by the powervalve and makes a smooth transition into the power band when rolling on the throttle. Available with bore sizes from 77.50mm to 79.00mm. Kit includes PV Cylinder, PV Assembly, Piston, Wrist Pin, WP Bearing, top-end gaskets, Top-end o-ring kit, Spacer plate, Cylinder dowels, and Long Base studs.