GT6 Engines

Click the Triumph Catalog or Triumph GT6 link to view more products.

Triumph 6 cylinder Engine Rebuild

Triumph 6 cylinder Engine Rebuild

At MotoCancelli we apply our tried & true performance techniques to our Triumph engine rebuilds with astonishing dyno and racetrack results.  Our “entry level” stage one engine rebuilds nearly double the horsepower of the engines in their original state.

For custom specs and availability please call 281-881-8476

Please read our purchase policy.


Stage 1 engines are precisely machined and meticulously assembled.

All Triumph engines are built with care and attention to detail.

Cylinder Head Work

  • Hot tank cleaning
  • Magnafluxed for cracks
  • Blend porting
  • Performance valve job
  • C.C. combustion chambers and Surface head to desired compression ratio
  • Rebuild rocker assembly
  • Install new rocker shaft
  • Install new rockers
  • Install new valve guides
  • Install new intake and exhaust valves
  • Replace valve springs
  • Replace spark plugs
  • Replace freeze plugs
  • Fresh paint
  • New hardware if needed
  • New gasket set

Engine Block Work

  • Hot tank cleaning
  • All parts magna-fluxed for cracks
  • Line bore main saddles if needed
  • Rebuild rods, resize big end, re-bush small end, polish beams, match weights
  • Bore and hone cylinders
  • Turn (if needed) and polish crankshaft
  • Regrind camshaft
  • Degree camshaft
  • Set piston deck height
  • Match piston weights
  • Balance crank assembly
  • Replace piston set
  • Replace rod bushings, bearings and bolts
  • Replace cam bearings if applicable
  • Replace main and thrust bearings
  • Install new lifters
  • Install new cam chain (gear if needed)
  • Install new oil pump
  • Replace water pump
  • Replace seals and gaskets
  • Replace oil galley plugs
  • Fresh paint
  • Freeze plugs

To balance with the newly rebuild crank assembly it is recommended to replace the clutch assembly.

*MotoCancelli  warranties only non-upgraded stage 1 engine packages on a conditional 12 months or 12,000 miles.

All parts for the stage 1 rebuild are o.e. type and not MotoCancelli parts.

With in-house precision rebuilds for performance upgrading parts are offered at a 10% discount.

*Any performance upgrades other than what is listed below will void this warranty.


  • CARBURETION: Single Weber, 2 barrel draft progressive. Keihin CR, side draft quad set 31mm only.
  • EXHAUST SYSTEMS: Any header and free flow exhaust is OK but must be in optimum condition. *We currently offer modified PaceSetter headers and our own tuned performance exhaust systems.
  • modified PaceSetter header
  • performance exhaust systems for Triumph
  • Replacement catalytic converters

Catalytic converter systems are required to be new with no cracks in manifold, or replaced with a performance header. We have after- market rebuilt cats for those unfortunate cars that may require them.

Speciality Built Engines – Stage 1, Triumph GT6 = $5,692.50 USD

Serious inquiries please call: 281-881-8476

*This price does not include re-sleeving block if necessary.


Includes everything in the Stage 1 Engine Rebuild above, but for more zip, we throw in:

  • 10/1 compression
  • Lightened flywheel
  • Stage 2 cam

Speciality Built Engines – Stage 1 PLUS, Triumph GT6 = $6,500.00 USD

Triumph Spitfire Cylinder Head

Triumph Spitfire Cylinder Head

Please call if you are seriously interested. 281-881-8476



All that is done on the Stage 1 Engine Rebuild plus the following:

Cylinder Head Work

  • Extreme Performance Cylinder Head Conversion Kit
  • Roller Rockers chose from 1.55 or 1.65 ratio
  • Maximum Port Work Flow Bench Tested

Block Work

  • Complete Engine ARP Hardware set
  • Exterior Oil Line to feed Rocker Shaft
  • Stock Rods are lightened, polished and shot peened
  • Light Tubular Push Rods
  • Lightened Lifters
  • Lighten Flywheel

Additional parts available with a 10% Discount!

(with the exception of the ARP hardware already discounted)

Speciality Built Engines (6cylinder) – Stage 2, Triumph GT6 = $8,386.95 USD

Serious inquiries please call: 281-881-8476

High Performance Cylinder Valve Kit

High Performance Cylinder Valve Kit



Professional Race Application

Includes all that is done on the Stage 2 Engine Rebuild plus the following:

Cylinder Head Work

  • Pro comp series head conversion kit (Titanium valves available)

Block Work

  • 4340 Chrome Moly steel, or Titanium connecting rods MotoCancelli designed
  • Ultra-light JE Piston set with gapless low friction ring package
  • MotoCancelli Stage 3 cam
  • MotoCancelli tubular Chrome Moly “heat treated” push rod set
  • MotoCancelli  crank case venting kit w/K&N filter

Stage 3 engines are also built in street-able specification.

Speciality Built Engines (6cylinder) – Stage 3, Triumph GT6 = $13,225.00 USD

Serious inquiries please call: 281-881-8476



We have decades of experience and proven race performance. Let’s talk.

We do not email information about our engines.

Serious inquiries please call: 281-881-8476