Duncan Racing has been building ATV engines for almost 50 years- No one can match DR’s expertise and experience.
Whether recreational riding or racing the foundation to a reliable engine is based in the core of the lower end. Without a correctly assembled well-conditioned lower end, you can't expect it to perform to your needs and offer the reliability that you expect from your engine.
Customer must send their engine to Duncan Racing for Build/Rebuild. * See engine build section on HOME page for more details

Pricing
Complete Engine Rebuild labor price includes teardown, analysis, cleaning and reassembly
*Prices are + parts and machine work

Powder Coating, Polishing, Chrome Plating also available.

Call for a consultation with engine builder #619.258.6306

2-Stroke Models
Model: Hon TRX 250R $695.00
Model: Suz LT 250 $695.00
Model: Yam Blaster $595.00
Model: Yam Banshee $795.00
Model: Suz LT 500 $795.00

4-Stroke Models:
All 4-Stroke Singles 450cc and Below $995.00 - $1095
All 4-Stroke Singles 500cc and Above $995.00 - $1095

All labor prices are plus any parts required and plus any machine work costs

At Duncan Racing International we have had over 3000+ ATV engines apart, and rebuilt at our facility. This plus our extensive racing experience, has made us more aware of some of the small things that either need modifications or may go wrong with your engine.

All DRI workmanship is 100% guaranteed

DRI uses the absolute finest quality parts available in the world today

DRI performs their engine machine work in house

Each engine is completely dis-assembled with all moving components extensively checked; bearings, gears, clutch plates, rod, piston etc.

After DRI has disassembled and inspected each engine a file is filed with all data about each engine.

>DRI then has a meeting with the owner of each engine, either via telephone or in person. During the direct meeting a plan is generated between DRI and client.

DRI then performs all necessary machine work

DRI thoroughly washes all engine components, inspecting all components again, cleaning and prepping all surfaces

A DRI technician then reassembles engine, installing all required new parts

After assembly all engines are test shifted and run through the most thorough group of tests possible

When completed engine is received by customer it is completely assembled and ready to go. Install in chassis, add coolant, oil and ready to go.

All engines are supplied with Tech Documents that help with Break In, Jetting, Engine Reinstallation, Air Filter Maintenance

DRI also offers unlimited phone Tech support to engine clients