Whether we’re freshening up a stock motor, or tuning a racing motor to the ragged edge, we can make your old motor run better than the day it left the production line, and look absolutely stunning. We measure bores, calculate piston-to-wall, set deck heights and squish bands, and provide all blueprinting and documentation.
Complete NYC Norton Motor Rebuild: Every motor is disassembled completely, inspected, measured, and documented. Cylinder head is fit with new Kibblewhite Black Diamond valves and Kibblewhite bronze guides reamed for perfect fit, new valve springs, inlet seals, and heat insulators, precision three angle valve seats cut, head is skimmed and trued for flatness, new rocker arm thrust washers and springs, NYC Norton polished stainless head fasteners, NYC Norton one-piece polished alloy rocker spindle covers and hardware and Goodridge stainless overhead oil lines. New pistons and pins are fit with Hastings rings, cylinder barrel is trued for flatness, piston rings set to perfect gap based on bore size, barrel is bored and honed for perfect piston-to-wall clearance, tappets are reground, cylinder barrel is painted in a high heat ceramic gloss black or silver finish and fit with NYC Norton stainless base nuts. The crankshaft is split, cleaned, magnafluxed, and completely rebuilt with new crank and connecting rod hardware, and new rod shells are fit to rods. Crankcases are cleaned and finished better than new, and assembled with NYC Norton polished stainless hardware. New cam bushings are fit as required and line bored for perfect tolerance. New NJ306 “Superblend” roller main bearings on both drive and timing side are installed with crank end float shimmed to perfect spec. The oil pump is rebuilt and lapped, timing and rocker covers faced flat for oil tight fit, all covers are show polished and all fasteners replaced with polished stainless, new crank and camshaft keys, new Andover Norton gaskets and seals used throughout, new rubber faced cam chain tensioner, and new spark plugs. Tachometer drive is modified with our NYC Norton seal fix, and motor fit with our complete NYC Norton sump reed valve breather setup – virtually eliminates oil leaks. We supply a set of NYC Norton polished stainless engine-to-frame mounting hardware. When it’s all done, we provide complete motor specification & blueprinting documentation for your files. What comes back to you is one of the most beautiful, performing Norton Twin motors available today, ready to fit.
— Custom builds and performance work are welcomed
Please CONTACT US with your rebuild needs