Manufacturer:	Triumph					Class: E
Model:		TR-4
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DESCRIPTION:
	2-Seater Steel Roadster
	Dry Weight: 2072 lbs
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ENGINE:	Type ..............	4 cyl ohv in line
	Bore & stroke .....	86mm x 92mm
	Capacity ..........	2138 cc
	Comp ratio ........	9.0
	Head material .....	Cast Iron
	Port size .........	Intake 1-5/8" dia, Exhaust 1-3/8" x 1-3/16"
	Piston material ...	Alloy
	Piston weight .....	1.44 lbs (with pin)
	Timing data:
		Intake ....	Open 15° BTDC, Close 55° ABDC
		Exhaust ...	Open 55° BBDC, Close 15° ATDC
				-or-
		Intake ....	Open 31° BTDC, Close 67° ABDC
		Exhaust ...	Open 70° BBDC, Close 28° ATDC
	Valve lift: .......	0.376" or 0.411"
	Valve head dia:
		Intake ....	1.56"
		Exhaust ...	1.30"
	Valve spring ......	Outer: 125lbs, Inner 69.5lbs, Aux Inner (Ex) 21.4lbs
	Carburation .......	Two SU H6
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TRANSMISSION AND DRIVE TRAIN:
	Ratios:	
		1	3.139
		2	2.01
		3	1.325
		4	1.00
		5
	Final drive ratios: 3.7(37/10), 4.1(41/10), 4.3, 4.625
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CHASSIS
	Wheelbase ...................	88"
	Track dimension, front ......	49" (disc), 50" (wire)
	Track dimension, rear .......	48" (disc), 49" (wire)
	Shock absorber ..............	Front-telescopic, Rear-lever
	Steering ratio ..............	12:1
	Brakes ......................	
	Tire size ...................	5.50 x 15, 155 x 15, 5.90 x 15
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APPROVED OPTIONAL EQUIPMENT
	Competition valve springs (02065-TR4)
	Overdrive (211020)
	Wire wheels (60 spoke) (506169)
	Aluminum sump (502126)
	Competition front springs (201899)
	Anti-roll bar (02052-TR4)
	Undersize pistons and liners (1991 cc)
	HD competition clutch (02051-TR4)
	Oil radiator (02053-TR4)
	Rear shock absorber kit (telescopic) (02054-TR4)
	Limited slip differential (02055-TR4)
	Competition push rods (02069-TR4)
	Rear suspension torque rods (02056-TR4)
	Competition exhaust system (02070-TR4)
	HD Comp. valves
	Cast alloy wheels (02057-TR4)
	HD Steel comp. wheels (02058-TR4)