Home>Make: Norton>1975 Norton Commando 850 Mk3>Engine, Primary Drive & Clutch>Crankshaft, Conrods, Pistons, Cam, Timing Gear

1975 Norton Commando 850 Mk3 Crankshaft, Conrods, Pistons, Cam, Timing Gear
1975 Norton Commando 850 Mk3 Engine: Crankshaft, Connecting Rods, Pistons, Camshaft, Timing Gear
Scroll sideways to view the table completely.
Plate #Part NamePart #Qty FittedDescription
1Connecting Rod0648962Billet 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 +0.010 - 1.74". Set of 4.
4Big End Shell Set, 0200642871Oversize +0.020 - 1.73". Set of 4.
4Big End Shell Set, 0300642881Oversize +0.030 - 1.72". Set of 4.
4Big End Shell Set, 0400642891Oversize +0.040 - 1.71". Set of 4.
5Crankshaft, Assembled0656601Not available.
6Crankshaft Dowel Stud0656711Part of crankshaft studs and nuts kit - not sold separately.
7Crankshaft Stud0666094Part of crankshaft studs and nuts kit - not sold separately.
8Crankshaft Stud Nut06567314Part of crankshaft studs and nuts kit - not sold separately.
9Fitted Stud0666072Part of crankshaft studs and nuts kit - not sold separately.
10Fitted Stud Washer60232223/8" plain, thin.
6-10Crankshaft Studs & Nuts Kit0670951Stronger than bolts.
11Crankshaft Oilway Screw0676001
12Crankshaft Timing Pinion0656701Half time pinion.
13Crankshaft Timing Pinion Key0656751
14Timing Pinion Back Plate0675251Triangular, at rear of timing pinion.
15Oil Pump Drive06788916 start.
16Camshaft, Standard0626081
17Camshaft Thrust Washer0610861Steel chamfered.
18Intermediate Gear0656671Complete with bush.
19Intermediate Gear Bush0656691
20Intermediate Gear Shaft0610781
21Intermediate Gear Shaft Circlip0676901At rear.
22Camshaft Sprocket0610801
23Camshaft Sprocket Key0005721
24Camshaft Sprocket Nut0677741
25Camshaft Drive Chain067689138 links.
26Cam Chain Tensioner Slipper0646471
27Cam Chain Tensioner Backing Plate0675752
28Cam Chain Tensioner Stud06266525/16 UNF.
29CamChain Tensioner Washer06770025/16" serrated.
30Cam Chain Tensioner Stud Nut06269225/16" UNF, small hexagon.
31Timing Side Bearing Washer0675261Fits behind 067525 back plate.
32Piston Set, Standard0638381Includes circlip, piston rings and gudgeon pin, 8.5:1.
32Piston Set, +20 Oversize (Hepolite)0640411Includes rings, gudgeon pins and circlips.
32Piston Set, +40 Oversize (Hepolite)0640421Includes rings, gudgeon pins and circlips.
32Piston Set, +60 Oversize0640431Includes circlip, piston rings and gudgeon pin, 8.5:1.
33Piston Ring Set, Standard (Hepolite)0679581For both pistons, 77mm.
33Piston Ring Set, +200679601For both pistons, 77mm.
33Piston Ring Set, +60 (Hepolite)0679621For both pistons, 77mm.
34Piston Gudgeon Pin0638422Wrist pin.
35PIston Wrist Pin Circlip0678344
-Bottom End Rebuild Kit0840051Includes main bearings, big end bolts, shells, chain, seals, gaskets, etc.