About Boss Racing
Performance four-stroke camshafts, valves, and engine internals
Boss Racing manufactures performance four-stroke engine internals — camshafts, valves, valve springs, and related top-end components — for motocross, ATV, and UTV applications. The brand's camshaft regrind and replacement programs are popular among engine builders looking for more aggressive valve timing without going to a full-race custom grind.
Chaparral Motorsports has been an authorized motorcycle and powersports dealer since 1980. We stock Boss Racing alongside the full range of motorcycle, ATV, and UTV gear, and our parts counter can confirm fitment and compatibility before you order.
What Boss Racing Makes
The major product lines you'll find under the Boss Racing name at Chaparral Motorsports:
| Product Line | What It Is |
|---|---|
| Boss Racing camshafts | performance-ground camshafts for popular four-stroke MX engines |
| Boss Racing valves and valve springs | OEM-replacement and performance-upgrade valve-train components |
| Boss Racing top-end performance kits | matched cam, valve, and spring combinations |
Who Boss Racing Is For
- Motocross engine builders: performance valve-train upgrades for race engines
- ATV and UTV tuners: more aggressive cam profiles for power-add builds
- Riders doing top-end refreshes: performance valves and springs at rebuild time
