Motorcycle on a lift inside the TSR shop
TSR Hi Performance American V-Twins, Piedmont SC — 250th anniversary logo

High performance is a habit

Service, repair and dyno tuning for every motorcycle that rolls through the door. Built on a lifetime of racing, run out of Piedmont, South Carolina.

V-Twin · Metric · Sport · Vintage

What we do

One shop for the whole bike — from a routine oil change to a fully tuned build sheet.

Maintenance & Service

Oil, fluids, belts, valves, plugs — the routine work that keeps a bike honest, done right the first time.

Diagnostics & Repair

Electrical gremlins, hard starts, weird noises, leaks. We chase the cause, not the symptom.

Dyno Tuning

Real numbers on our in-house dyno: horsepower, torque and air/fuel dialed for how you actually ride.

Performance Builds

Cams, heads, big bores, exhaust and intake packages built as a complete, tuned combination.

Tires, Brakes & Suspension

Mount and balance, brake service, fork rebuilds and shock setup for your weight and riding style.

Every Make, Every Model

V-twins are our heritage — but metric, sport, adventure, vintage and everything else rolls through these doors.

Motorcycle strapped to the dyno with telemetry screens glowing behind it

In-house dyno

Numbers, not guesses

Every tune, build and "it feels a little flat" complaint ends up on the dyno. You leave with a printed horsepower and torque curve, a corrected air/fuel trace, and a bike that pulls clean everywhere you actually ride it.

  • Baseline pulls before and after any performance work
  • Air/fuel and ignition mapping for street or track
  • Fuel-injected and carbureted bikes welcome
  • Printed results you keep with the bike
Tommy, owner and founder of TSR High Performance

Owner & Founder

Tommy

Tommy has been around motorcycles his entire life — first as a kid in the garage, then through a long run in high-performance V-twin racing where tenths of a second came down to how carefully a motor was assembled.

TSR is where that legacy keeps going. Same standards, same obsession with detail, only now it's aimed at your bike. Whatever you ride, Tommy would rather you ride it more — and he built this shop so you can. Come by, talk bikes, join the ride.

Life on two wheels

Tommy launching his flamed nitro V-twin drag bike at the strip
Tommy with friends and the Motorcycle Cannonball endurance race award
Tommy riding with his daughters on a vintage Harley-Davidson
Tommy and family arm in arm at a motorcycle rally
Tommy and his wife at the waterfront
Tommy launching his flamed nitro V-twin drag bike at the strip
Tommy with friends and the Motorcycle Cannonball endurance race award
Tommy riding with his daughters on a vintage Harley-Davidson
Tommy and family arm in arm at a motorcycle rally
Tommy and his wife at the waterfront