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Alter’d Motorsports

Cruisers & Harleys · Carrollton, TX

Big twins, tuned on the same rollers as the superbikes.

Harley-Davidson, Indian and metric cruisers get their own section here because they are not sportbikes with more chrome. Air-cooled heat, lean factory maps, belt drive and a service schedule built around three fluids change how the work is done. The dyno, the data and the printed sheet stay the same.

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Black V-twin cruiser strapped to the chassis dyno in the bay

What we do for big twins

Six jobs, one dyno, no guesswork.

Black V-twin cruiser strapped to the chassis dyno, rear tire on the roller
01

Harley & Indian Dyno Tuning

A big twin tune starts with heat and drivability. The horsepower comes after, and it comes with a printed sheet.

Details →
Diagnostic cable being connected to the port under the seat of a touring cruiser
02

ECU Flash & Tuner Modules

Flash the factory ECU or fit a tuner module. Either way the calibration is written for your parts and proven on the rollers.

Details →
Camshafts, high-flow air cleaner, big bore cylinders and pistons laid out on a bench
03

Stage 1 to Stage 4 Upgrades

Air cleaner and exhaust, then cams, then displacement, then heads. One rung at a time, each one tuned on the dyno.

Details →
Engine oil being drained from a big V-twin cruiser on the lift
04

Cruiser Service & Maintenance

Three fluids, a belt, a schedule and a record for your file. The service your dealer does, without the dealer.

Details →
Wide rear tire being mounted on the chrome wheel of a black bagger
05

Tires, Brakes & Drive Belts

Wide rears, whitewalls, belts and brakes. The wear items a cruiser goes through, done right and torqued to spec.

Details →
Bagger on the lift with new rear shocks being fitted
06

Suspension, Lowering & Bagger Fitment

A cruiser should fit the rider and hold the road. Shocks, forks, lowering and bars, set up for how and where you ride.

Details →

Why cruisers get their own section

Not a sportbike with more chrome.

01

Heat is the first problem, not horsepower

A factory V-twin map runs lean to pass emissions, and the rear cylinder pays for it in traffic. A proper tune richens cruise and idle, fixes the deceleration pop and the surge at 2,500 rpm, and only then goes looking for power.
02

Torque arrives low and the dyno has to be ready for it

A big twin makes its torque under 4,000 rpm, so pulls are loaded differently, strapping is different and the air-fuel targets are not the ones a 14,000 rpm inline-four wants. The session is built around the engine, not copied from one.
03

The parts path is a ladder

Air cleaner and exhaust, then cams, then displacement, then heads. Each rung needs its own calibration. We tell you which rung is worth the money for the way you ride and tune the bike once per step instead of guessing between them.
04

Service is three fluids, a belt and a schedule

Engine oil, primary and transmission are separate on most Harley-Davidson models; Indians and metric cruisers have their own intervals. Belt tension, compensator wear, brake fluid and the 1,000 / 5,000 / 10,000-mile items are checked against the factory book every time.

The stage path

One rung at a time, tuned at every step.

  1. Stage 1

    Breathe

    High-flow air cleaner, a free-flowing exhaust or slip-ons, and a dyno tune to match. The biggest drivability change per dollar on a stock bike, and the step that fixes the heat.

  2. Stage 2

    Cams

    A camshaft matched to the displacement and the way you ride: torque cams for touring, a bigger grind for a Softail that gets ridden hard. Installed with new lifters and pushrods where the platform needs them, then tuned.

  3. Stage 3

    Displacement

    Big bore kits take a 107 to a 114 or 117, a 114 to a 124 or 128, a 103 to a 107 or 110. Bored or sleeved cylinders, new pistons and rings, head work where it earns its keep.

  4. Stage 4

    Heads and compression

    Ported heads, higher compression, matched throttle body and injectors. A full-day dyno session with multiple maps for pump and race fuel when it applies.

Stage upgrades in detail →

Platforms

What rolls into the bay.

Harley-Davidson

  • Milwaukee-Eight 107, 114, 117, 121 and 131
  • Twin Cam 88, 96, 103 and 110
  • Evolution and Sportster Evolution
  • Revolution Max (Sportster S, Nightster, Pan America)
  • Touring, Softail, Dyna, Sportster, CVO and trikes

Indian

  • Thunderstroke 111 and 116
  • PowerPlus 108 and 112
  • Scout 1133 and 1250
  • Chief, Chieftain, Challenger, Springfield, Roadmaster and Pursuit

Metric cruisers and modern classics

  • Honda Rebel, Shadow and Fury
  • Yamaha Bolt, V Star and Raider
  • Kawasaki Vulcan
  • Suzuki Boulevard
  • Triumph Bonneville, Speedmaster, Thruxton and Rocket 3

Crash and insurance repair for cruisers runs through the same process as the rest of the shop: insurance repair. Not sure where your bike fits? Call (972) 510-9915.

Cruiser services A to Z

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Questions

Cruiser and Harley FAQ

Do you only work on Harley-Davidson, or Indian and metric cruisers too?

All of them. Harley-Davidson is the bulk of the cruiser work, Indian Thunderstroke and PowerPlus come in regularly, and metric cruisers from Honda, Yamaha, Kawasaki, Suzuki and Triumph are welcome for service, tires and tuning.

My bike is stock. Is a tune worth it?

Usually yes, for heat and drivability more than peak numbers. The factory map runs lean at idle and cruise; correcting it makes the bike cooler in traffic and smoother off idle. Add an air cleaner and exhaust and the gains get much bigger.

Flash the ECU or fit a tuner?

It depends on the model year, the ECU and whether you want to keep the bike reversible for a dealer. We will recommend the cleanest option for your bike and verify either one on the dyno.

Can you do the 1,000-mile or 5,000-mile service instead of the dealer?

Yes. Factory-schedule service with the correct fluids, the inspection items in the book and a record for your file. Ask your dealer how it treats warranty work done by an independent shop.

Will you work on a bagger with a stretched rear or air ride?

Yes. Custom baggers and lowered bikes need care on the dyno and on the lift, and that is part of the job. Tell us about the setup when you book.

Bring the big twin.

Tell us the year, model and what is on the bike, and we'll tell you what it needs. Carrollton, TX, off I-35E at Whitlock Ln.

Book a session(972) 510-9915