Norton Commando - Engines

SRM Engineering offer a Quality and Professional Engine and re-conditioning service.

  • Crankshaft grinding
  • Dynamic crankshaft balancing
  • Rebores
  • Helicoils & thread repairs
  • Lead free valve seats
  • Exhaust thread repairs
  • Colisbro valve guides
  • Gas following
  • Fin repairs
  • Alloy polishing
  • Stove enamel for cylinders

 

CRANKSHAFT
Sludge tap thoroughly cleaned.
Regrinding accurately to  size and specified radii.
Best quality big end shells.
Dynamic balancing to smooth out the vibrations.

CONRODS
Checked and polished but we would recommend NEW billet conrods.
Failure of an old conrod will destroy the engine.

CYLINDER HEAD
Colsibro valve guide fitted and sized.
Hardened valve seats fitted to run on Unleaded fuel.
Fin and thread repairs.
Blasting and cleaning to restore the Original finish.
Gas flowing and tuning.

CYLINDER BARREL
Bored to within 0.002” (thou) then honed to an exact size, within two tenths of a thou (0.0002”) tolerance,
Bore size is matched to piston dimensions for correct clearance.
Bores are straight and parallel.
Barrels are shot blasted and a high quality stove enamel paint before machining.

BUSHES, BEARINGS & OIL SEALS
High quality bushes are always used and can be made to size to accommodate worn shafts or casings. 
New quality bearings and oil seals are always fitted.

EXHAUST THREAD REPAIRS

Oversize bronze sleeve fitted to the exhaust port and then threaded to accept downpipe collar.

ENGINE REBUILD
All our engines are carefully assembled by fully trained engineers in a purpose built dust free room with no machine tools present, this ensures the engine components and the partly assembled engines do not get contaminated.

OUR GUARANTEE

We rebuild engines to be used, be reliable and give thousands of trouble free miles.
We guarantee the engine for a full 12 Months unlimited mileage.

 

HOW MUCH DOES IT COST?

Before we commence the rebuild on your engine, it is inspected for wear and damage. An estimate is then compiled listing all new parts, engineering work and repairs required include a list of options such as exterior cosmetics and other useful modifications & options such as Needle Roller maim bearing conversion, dynamic balancing, lead free conversion and tuning options.