Home>Make: Norton>1973-74 Norton Commando 750 & 850>Engine, Primary Drive & Clutch>Crankshaft, Conrods, Pistons, Cam, Timing Gear

1973-74 Norton Commando Crankshaft, Conrods, Pistons, Cam
1973-74 Norton Commando 750 & 850 Engine: Crankshaft, Connecting Rods, Pistons, Camshaft, Timing Gear
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Plate #Part NamePart #Qty FittedDescription
1Connecting Rod0680212Billet type - even stronger.
2Connecting Rod Big End Bolt06648643/8", forged, and uses rolled threads.
3Connecting Rod Self Locking Nut06782743/8" CEI.
4Big End Shell Set, Standard0642851Standard - 1.75". Set of 4.
4Big End Shell Set, 0100642861Oversize +10 - 1.74". Set of 4.
4Big End Shell Set, 0200642871Oversize + 20 - 1.73". Set of 4.
4Big End Shell Set, 0300642881Oversize +30 - 1.72". Set of 4.
4Big End Shell Set, 0400642891Oversize +40 - 1.71". Set of 4.
5Crankshaft, 8500642541
6Crankshaft, 7500631061
7Crank-cheek, Timing Side, 750NM232621Not available.
8Crank-cheek, Drive Side, 7500605421Not available.
9Flywheel, 7500607311Balance after fitting.
10Dowell, Crankshaft Centre0675581Fits through flywheel and cheeks.
11Crankshaft Tab Washer0675342Part of crankshaft studs and nuts kit - not sold separately.
12Crankshaft Stud0641844Part of crankshaft studs and nuts kit - not sold separately.
13Crankshaft Stud Nut0641608Part of crankshaft studs and nuts kit - not sold separately.
14Crankshaft Stud0641852Part of crankshaft studs and nuts kit - not sold separately.
15Crankshaft Stud Nut0641894Part of crankshaft studs and nuts kit - not sold separately.
-Crankshaft Studs & Nuts Kit0670941Stronger than bolts.
16Crankshaft Oilway Screw0676001
17Crankshaft Timing Pinion0675371Half time pinion.
18Crankshaft Timing Pinion Key0005721
19Timing Pinion Back Plate0675251Triangular, at rear of timing pinion.
20Oil Pump Drive06788916 start.
21Camshaft, Standard0610841
21Camshaft, 2S0635361Has more power at the top end at the expense of bottom end torque.
21Camshaft, 4S0648581More midrange power than the 2S, for sports road use and road racing.
22Camshaft Thrust Washer0610861Steel chamfered.
23Intermediate Gear0610771Complete with bush.
24Intermediate Gear Bush0610791
25Intermediate Gear Shaft0610781
26Intermediate Gear Shaft Circlip0676901At rear.
27Camshaft Sprocket0610801
28Camshaft Sprocket Key0005721
29Camshaft Sprocket Nut0677741
30Camshaft Drive Chain067689138 link.
31Cam Chain Tensioner Slipper0610941
32Cam Chain Tensioner Plate, Thin0675751Inner plate, long end up.
33Cam Chain Tensioner Plate, Thick0675761Outer plate, short end up.
34Cam Chain Tensioner Stud06266525/16 UNF.
35CamChain Tensioner Washer06770025/16" serrated.
36Cam Chain Tensioner Stud Nut06269225/16" UNF, small hexagon.
37/38Piston Set, 750, Standard0670551Complete with circlip, piston rings and gudgeon pin, 9:1.
37/38Piston Set, 750, +20 Oversize (Hepolite)0670561Complete with rings, gudgeon pins and circlips.
37/38Piston Set, 750, +40 Oversize (Hepolite)0670571Complete with rings, gudgeon pins and circlips, 73mm, 8.9-1.
37/38Piston Set, 750, +60 Oversize0671101Complete with circlip, piston rings and gudgeon pin, 9:1.
39Piston Set, 850, Standard0638381Complete with circlip, piston rings and gudgeon pin, 9:1.
39Piston Set, 850, +20 Oversize (Hepolite)0640411Complete with rings, gudgeon pins and circlips.
39Piston Set, 850, +40 Oversize (Hepolite)0640421Complete with rings, gudgeon pins and circlips.
39Piston Set, 850, +60 Oversize (Hepolite)0640431Complete with circlip, piston rings and gudgeon pin.
40Piston Ring Set, 750, Standard (Hepolite)0670581For both pistons, 73mm.
40Piston Ring Set, 750, +10 (Hepolite)0679541For both pistons, 73mm..
40Piston Ring Set, 750, +20 (Hepolite)0670601Hepolite, for both pistons, 73mm.
40Piston Ring Set, 750, +300671221For both pistons, 73mm, compression ratio 8.9-1.
40Piston Ring Set, 750, +40 (Hepolite)0670621Hepolite, for both pistons, 73mm.
40Piston Ring Set, 750, +600671231For both pistons, 73mm.
41Piston Ring Set, 850, Standard0679581For both pistons, 73mm.
41Piston Ring Set, 850, +200679601For both pistons, 73mm.
41Piston Ring Set, 850, +400267301For both pistons, 73mm.
42Piston Gudgeon Pin, 8500638422Wrist pin.
43Piston Gudgeon Pin, 7500609552Wrist pin.
44PIston Wrist Pin Circlip0678342
45Timing Side Bearing Washer0675261Fits behind 067525 back plate.
-Bottom End Rebuild Kit0840041Includes main bearings, big end bolts, shells, chain, seals, studs, nuts, gaskets, etc.