Example Engine Specs

Example Engine Specifications:
All power figures are at the Flywheel and are approximate

Stage 1: 85 Bhp

	K&N air filters
	4-2-1 Tubular exhaust system with straight through silencers (don't bother having a radio after getting these!)
	Richer Carb needles

Stage 2: 90 Bhp

	K&N air filters
	4-2-1 Exhaust
	Richer still carb needles
	Electronic Ignition
	Oil cooler
	Wide radiator
	Mild head flow work

Stage 3: 110 Bhp

	All the above
	Lightened flywheel (just makes it rev up faster)
	Fully Balanced internals
	Uprated con rod bolts with polished rods
	Triumph Tune Fast road 83 camshaft
	Compression > 9.75/1
	Triumph Tune stainless steel valves, bigger 1.475" inlets with standard size exhaust valves
	Bronze valve guides
	Flowed head
	Slightly stiffer valve springs
	Three angle valve seats

Stage 4: 120 Bhp+

	All the above
	Nitrided crankshaft (wears less)
	Performance bearings
	Fast road 89 camshaft
	Vernier duplex timing chain & sprockets
	Twin Weber 40DCOE carburettors
	Exhaust wrap
	ARP flywheel bolts
	Drilled crank & flywheel for additional fasteners
	Lightened & nitrided cam followers
	Chrome moly push rods
	Roller rockers
	Bigger exhaust valves

Many parts and operations can be swapped from stage to stage and these are just a guide to give you an idea about what you might like to do. Triumph Tune lay out the general procedure as follows.

	Exhaust system
	Carburation improved or changed
	Modified cylinder head
	Performance camshaft