Welcome to Performance Engineering Services

PES. New motorcycle parts manufactured for bikes produced in the past. BSA specialist. Making dreams come true and banishing the nightmares of owning a classic bike.

Performance Engineering Services

From a single washer to a complete bike, PES is your answer. Although we don't claim to always have eveything in stock, you can pre-order from the next batch to be manufactured. Fast moving parts can normally be dispatched next day.

Price List

Check out our price list of over 2,200 products for your classic motorbike. We manufacture and sell parts for BSA, Triumph and Norton.

Postal Rates

We deliver parts worldwide. All packages posted in the UK are sent first class recorded delivery. For overseas customers, please get in touch with regards to airmail.

Spare Parts

Browse by model. Our online catalogues are digital versions of the original spare parts catalogues. Read more...

New and Featured Products

View our showcase of the various parts, kits and conversions we have remanufactured or developed to make your classic motorcycle ownership more rewarding. Read more...

Engineering

Off-road design, manufacture and preparation of competition motorcycles. Read more...
© 2022 Performance Engineering Services, Elim Church, Beever Street, Goldthorpe, South Yorkshire, S63 9HT, United Kingdom
Telephone: 01709 894192. Email: pes.sales@btconnect.com. Facebook: facebook.com/performance-engineering-services.
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Home/New and Featured Products/Gearbox & Clutch

Gearbox & Clutch

272 products

4 Speed Selector Fork Mainshaft A3D110 TG4 Trials and Race Gearbox(PES)
57-2732 BSA Clutch Tab Washer
66-3071 Packing washer mainshaft
66-3080 M20, M21, B31, B33 Kickstart Ratchet Pinion
66-3083 Gear control shaft
66-3258 NOS BSA B31 B32 B33 B34 M20 M21 CONTROL SHAFT PEG
66-3259 BSA B31 B33 M21 M20 KICKSTART RETURN STOP RUBBER
66-3283 Gearbox Mainshaft BSA M20/21 and B31/33
9/16" Half Nut PES A65 JH29
AMAL CARB NEEDLE JET, 106, MARK 2, GENUINE, 2928/122-106
B50 GEARBOX DRAINPLUG WITH MAGNET(STAINLESS STEEL) 21-2111A
BSA 4 Speed Sleeve gear inner spacer G11 PES
BSA 4 Speed Sleeve Gear Kit G4A replaces 57-3872 and 41-3061 22T (needle roller) PES
BSA A B M Gearbox Adjuster Locking Washer 42-4075
BSA A50 A65 B50 Triumph Clutch Thrust Washer 57-3931 68-3278 57-1735
BSA A50 A65 PES Sleeve Gear Support Bush for G5
BSA A65 5S RACE GEARBOX FULL ROLLER BEARING/UNDERCUT DOGS. (PES)
BSA A7 A10 A50 A65 B31 B32 B33 B34 M20 M21 Clutch Key 02-0433 K139
BSA A7 A10 B31 B32 B33 B34 C10 C11 M20 M21 M33 6 Spring Surflex Friction Clutch Plate
BSA A7 A10 B31 B32 B33 B34 M20 M21 M33 Gearbox Sprocket Lock Washer 24-4263
BSA A7 A10 B31 B33 Gearbox Sliding Plate 66-7520
BSA A7 A10 Clutch Centre 6 Spring 42-3107 42-3220
BSA A7 A10 M20 M21 B31 B32 B33 B34 Clutch Spring 66-3800
BSA B/M Plunger Gearbox Gasket Set BSA 344
BSA B25 B40 B44 B50 Clutch Mounting Hub 57-4200 40-3201 PES
BSA B25 B40 B44 B50 Clutch Spring 41-3091 40-3231 57-1742 57-2727 57-1145
BSA B25 B40 Regina Primary Chain 70 Link 19-8613 60-0951
BSA B25 B44 B50 Aluminium Clutch Basket 57-4198 57-4303 40-3203
BSA B25 B44 B50 Triumph TR25 Mainshaft 1st Gear 16T 41-3089 57-2663 PES
BSA B25 C25 B44 B50 Triumph Layshaft Circlip 41-3078 57-2669
BSA B31 B32 B33 B34 M20 M21 C10 C11 Engine Sprocket Cush Drive Bearing Nut
BSA B31 B32 M20 M21 Pawl Carrier Arm Assembly (top)
BSA B31 B33 B34 M20 M21 Kickstart Ratchet Lock Washer 24-4278
BSA B31 B33 M20 M21 M33 Crankshaft Timing Pinion 65-0692
BSA B31-B33 A7 A10 Clutch Adjuster Screw
BSA B44 B50 3 Speed 18T Slider Gear PES(layshaft) G47 PES (runs with G46)
BSA B44 Mainshaft 3 speed G22A PES
BSA B44 PES 3 Speed Gearbox (Needle roller) A40A
BSA B50 B44 19 TOOTH FRONT SPROCKET
BSA B50 B44 3 Speed 14T Fixed Gear Layshaft A2D1-09 G31 PES
BSA B50 B44 3 Speed 16T Spinner Gear PES Mainshaft G46 (runs with G47) + needle bearing PES
BSA B50 B44 3 Speed 18T Slider Gear (mainshaft) G17 A2D1-27 PES
BSA B50 B44 3 Speed Layshaft Large Thrust Washer A2D1-14 G25 PES
BSA B50 B44 3 Speed Selector Fork Layshaft A2D1-16 G23 PES
BSA B50 B44 3 Speed Selector Fork Mainshaft A2D1-17 G21 PES
BSA B50 B44 3 Speed Thrust Washer, Layshaft Driving Side A2D1-19 G32 PES std
BSA B50 B44 B25 Camplate Spindle Split Pin 60-2724
BSA B50 B44 B25 CLUTCH ARM 57-2750 (PES) STAINLESS
BSA B50 B44 B25 Sleeve Gear Bearing Retainer A2D1-29 G16 PES
BSA B50 B44 B40 B25 C15 Triumph 300 500 Mainshaft Bush Clutch Pushrod 57-1391 40-3007 PES
BSA B50 B44 B40 B25 C25 Sleeve Gear Bush 41-3045 57-2753 PES
BSA B50 B44 B40 B25 Uprated Clutch Alloy Pressure Plate 57-4019 PES
BSA B50 B44 Layshaft 3 speed G24 A2D1-06 PES
BSA B50 CAM SHAFT WOODRUFF KEY E75
BSA B50 Clutch rivet set 57-4507
BSA B50 HEAVY DUTY CLUTCH SPRING 41-3091 E35 PES
BSA B50 Mainshaft 3 speed A2D1-28 G22 PES
BSA B50 PES 3 Speed Gearbox (Needle roller) A40
BSA Bantam Clutch Spring
BSA Bantam Gerchange Shaft 90-1143
BSA C15 B25 B40 B44 B50 Clutch Pushrod 57-2733 40-3265 PES
BSA C15 B25 B40 B44 B50 CLUTCH WOODRUFF KEY 40-3150 57-2714
BSA C15 B25 B40 B44 B50 Spring Nut 41-3215 57-2748 57-1146 40-3219
BSA C15 B40 B25 B44 B50 Spring cup 57-4121 40-3218
BSA C15 C25 B25 B40 B44 B50 Surflex Plain Clutch Plate 40-3220 57-2725
BSA C15 C25 B25 B40 B44 B50 TR25W Primary Chaincase Gasket 71-1418 40-0247
BSA C15 C25 B25 B40 B44 B50 TR25W Surflex Clutch Friction Plate 40-3233 57-2726
BSA C15, B25, B40, B44, B50 Clutch Spider 41-3209 57-2715
BSA Clutch operating pinion 57-2700 40-3283
BSA Gear Selector Shaft 57-2688 40-3032 PES
BSA Gearbox Mainshaft bearing circlip 76-0528 70-8152
BSA GENERATOR WOODRUFF KEY C15 C25 B25 B40 B44 B50 41-0673 70-8144
BSA Layshaft 1st 29T PES0001 (to go with PES0002)
BSA Layshaft 1st Gear Bush 40-3262 57-2752 PES
BSA M20 24-4232 Mainshaft Felt Seal.
BSA M20 66-3214 2nd and 3rd gear bush PES
BSA M20 Chaincase Gasket Hallite 66-7573
BSA M20 Chaincase Securing Bolt 65-7550
BSA M20 Clutch Adjuster lock nut reduced hex 27-4411 1/4 x 26tpi
BSA M20 Clutch Adjuster Nut NOS 27-4411 1/4 x 26tpi
BSA M20 Clutch Cap Lock Washer 26-4138
BSA M20 Clutch Lever Fulcrum Pin NOS 65-3162
BSA M20 Clutch Lever NOS 65-3160
BSA M20 Clutch Lever Rubber Cover 65-3161
BSA M20 Clutch Pushrod
BSA M20 CLUTCH Pushrod Thrust Pin 25-4251
BSA M20 Clutch Rod Gland Washer Felt 15-270
BSA M20 Clutch Sleeve Cork Ring 66-3813
BSA M20 Clutch Spring
BSA M20 Dog Clutch NOS
BSA M20 Front and Rear Chaincase Fixing Screw Stainless Steel Black 24-7065 01-4606
BSA M20 Gear Control Fork NOS
BSA M20 GEARBOX AND CHAINCASE WASHER CORK 66-3090
BSA M20 Gearbox Layshaft NOS
BSA M20 Gearbox Screw 1 1/2" 66-3065
BSA M20 Gearbox Screw 2 1/4" 65-3062
BSA M20 Gearbox Screw 2 1/4" 66-3062
BSA M20 Gearbox Welch Blanking Plug 35-1079
BSA M20 Inner Cover Bolt 21-2888
BSA M20 Inner cover gear control quadrant bush NOS
BSA M20 Inner Cover Screw 24-4214
BSA M20 Kickstart Ratchet Sleeve Nut NOS 24-4282
BSA M20 Layshaft 2nd Gear 25T NOS
BSA M20 Layshaft Gear 17T x 20T NOS
BSA M20 Layshft 1st Gear 29T NOS
BSA M20 M21 B31 A10 4 Lobe Engine Sprocket 17T - 15-1567
BSA M20 M21 B31 A10 4 Lobe Engine Sprocket 18T - 15-1566
BSA M20 M21 B31 A10 4 Lobe Engine Sprocket 19T - 15-1565
BSA M20 M21 B31 A10 4 Lobe Engine Sprocket 20T - 15-1564
BSA M20 M21 B31 B33 Cush Drive Splined Hub/Sleeve with Spacer 4 Lobe 65-2534
BSA M20 M21 Clutch Roller Set (22)
BSA M20 M21 Mainshaft End Nut NOS 15-0374
BSA M20 M21 Oil Flinger Washer 24-4235 PES
BSA M20 M21 Pre 48 Clutch Hub 66-3799
BSA M20 M21 WD Models Clutch Sleeve Nut 15-4312
BSA M20 Main shell gear control bush 66-3084 NOS
BSA M20 Mainshaft 2nd Gear 20T x 16T NOS
BSA M20 Mainshaft 3rd Gear 25T NOS
BSA M20 Outer Cover Bolt 15-4207 NOS
BSA M20 Pawl carrier arm main spring 15-4139
BSA M20 Pawl carrier Return Spring
BSA M20 Ratchet Lever Sleeve Bush 15-4227 PES
BSA M20 Sleeve Gear Bush 66-3155 15-4120
BSA M20 Sleeve Gear with Bush NOS
BSA M20 Surflex Clutch Friction Plate 15-2419
BSA M20WD Clutch Cover Gasket 15-4316
BSA Mainshaft 1st 14T PES0002 (to go with PES0001)
BSA Mainshaft 1st gear 18T 41-3065 MX PES
BSA Mainshaft half nut 76-0271 57-2686 PES
BSA Mainshaft spacer washer A2D1-10 G20 PES
BSA Shim layshaft 1st gear 40-3258 57-2670
BSA Sliding Gear Wide Ratio Conversion PES0003 19T
BSA TIMING WOODRUFF KEY B25 B44 B50 70-1580 41-0560
BSA Triumph Clutch roller set (25) 40-3206 57-2719
BSA Unit single 1st gear layshaft 25T 41-3073 MX PES
BSA Unit single 1st gear layshaft 27T 57-3874 41-3087 PES
BSA Unit single 3rd gear 24T Mainshaft 41-3063 small bore PES
BSA Unit single 3rd gear 24T Mainshaft 57-4665 large bore PES
BSA Unit Single Drive/Gearbox Sprocket Lock Washer 57-2702 40-3121 40-3050
BSA Unit single Sliding gear 19t 57-3877 41-3069 layshaft PES
BSA Unit single Sliding gear 21t 57-3876 41-3064 Mainshaft PES
C15 B40 B44 GEARBOX DRAIN PLUG WITH MAGNET 40-1034A 16TPI
C15 B40 B44 STAINLESS STEEL GEARBOX DRAIN PLUG WITH MAGNET 40-1034B
Cam Plate A3D112 TG10 (see G40) (PES)
Cam plate BSA 3 speed G14 PES A2D1-18
Camplate Plunger Spring A65
Crankpin locking washer screw (41/64-1/4)
Dynamo Brush Plate
Gear control operating shaft
Gearbox connecting bolt (front)
Gearbox connecting bolt (rear)
Gearbox sprocket nut 57-1434 40-3051 C15 B25 B44 B50 A65 A7 (PES)
Gearchange return spring 57-1109 40-3061
K19x23x13 PES JH26 A65 needle roller bearing
K19x23x17 Needle Roller Bearing PES Sleeve Gear Quaife G10A
K20x24x17 Needle Roller Bearing PES Mainshaft G19
K21x25x17 Layshaft Needle Cage Bearing G28
K22x26x13 JH25 PES A65 needle roller bearing
K22x26x17 PES A65 needle roller bearing JH27
Kickstart Quadrant 19mm x 33 spline B50 inc. bearing PES. Uses Yamaha kickstart Lever
Kickstarter ratchet pinion sleeve locknut
Layshaft 1st. Gear 27T TG11 Trials (A3D206) (PES)
LAYSHAFT 2ND GEAR 22T B25-B50 41-3070 57-2668 PES
Layshaft 3rd Gear 20T Trials (A3D208) This gear is marked TG6, should be TG15 (PES)
Layshaft 4 speed Trials A3D107 TG17 (PES)
Layshaft 41-3068 57-2667 14T PES
Layshaft Fixed 4th Gear 14T TG16 Trials (PES)
Layshaft Sliding 2nd Gear 24T TG14 Trials (A3D207) (PES)
Mainshaft Fixed 1st. Gear 15T TG8 Trials (PES)
Mainshaft Sliding 3rd. Gear 21T TG5 Trials (PES)
Mainshaft Spinning 2nd Gear 18T Trials This gear is marked TG15, should be TG6 (PES)
Mounting Clip, Heat Shield, Triumph High Level Exhaust, 70-9688
Norton Clutch Diaphragm Circlip 06-0751
Norton Clutch Diaphragm Spring 06-0770
Norton Commando 750cc/850cc Clutch plate steel Surflex 06-0746
Norton Commando Hardened Clutch Centre 06-3979
PES 3 Speed 16T Spinner Gear Layshaft with Needle Roller Bearing G27 A2D1-08
PES 4 SPEED RACE GEARBOX BSA B50 NEEDLE BEARING GEARS A100
PES 4 Speed Race Gearbox Camplate G110
PES 4 Speed Race Gearbox selector fork G113
PES 4 Speed Race Gearbox Slider Gear G114
PES 4 Speed Race Layshaft Fixed Gear G116
PES 4 Speed Race Layshaft G118
PES 4 Speed Race Mainshaft Fixed Gear G108
PES 4 Speed Race Mainshaft G117 B50
PES 4 Speed Race Mainshaft G117A (B25,B44)
PES 4 Speed Race Mainshaft Sliding Gear G105
PES 4 Speed Race Sleeve Gear Bearing Spacer G102
PES 4 Speed Race Sleeve Gear G101
PES 4 Speed Race Spinning Gear Mainshaft G115
PES 4 Speed Race Spinning Layshaft 1st Gear G111
PES 4 SPEED RACE SPINNING LAYSHAFT 3RD GEAR G106
PES A65 5 speed Camplate JH14
PES A65 5 speed Fixed Gear Layshaft 18T JH07V2
PES A65 5 speed Fixed Gear Mainshaft 13T JH02V2
PES A65 5 speed Layshaft 2nd Sliding/Spinning Gear JH08 V2 complete
PES A65 5 speed Layshaft JH06
PES A65 5 speed Mainshaft
PES A65 5 speed Mainshaft 2nd 3rd Sliding Gear 16T 18T JH04
PES A65 5 speed Mainshaft 4th Spinning Gear 19T JH03 Complete
PES A65 5 speed Sleeve Gear Complete JH05
PES A65 5 Speed Sliding Gear Layshaft 4th 19T JH10V3
PES A65 5 SPEED SPINNING GEAR LAYSHAFT 21T JH09V2
PES A65 Clutch Hub Conversion G51
PES A65 Layshaft 2nd .08 wire bearing retainer JH23
PES A65 LAYSHAFT BRONZE THRUST WASHER JH16
PES A65 Layshaft circlip
PES A65 Mainshaft Spacer Washer JH13
PES A65 Selector Fork into JH04 JH17
PES A65 Selector Fork into JH08 JH18
PES A65 Selector Fork into JH10 JH19
PES A65 Sleeve Gear Bearing Spacer JH20
PES A65 Sleeve Gear bronze Thrust Washer JH15
PES BSA A65 5 SPEED SPINNING GEAR LAYSHAFT 26T JH11V2
PES BSA A7 A10 Twin M20 Bar Turned Nut 02-0124 EA60
PES BSA B31 B32 M20 M21 Inner Cover Pedal Shaft Bush 15-4226
PES BSA B31 B33 M20 M21 Gearbox Sprocket Lock Nut 24-4226
PES BSA B44 B25 4 Speed Race Gearbox Needle Bearing Gears A100A
PES BSA B50 B44 3 Speed Sleeve Gear Complete G15
PES BSA B50 B44 B40 B25 4 Speed Camplate 57-3850 40-3294
PES BSA B50 B44 B40 B25 Multiplate Clutch CL23
PES BSA B50 B44 Kickstart Lever Rebuild Kit
PES BSA B50 B44 Splined Mainshaft 4 speed G1A
PES BSA C15 C25 B40 B44 B25 B50 TR25W Clutch Retaining Nut 40-3227 57-2730 M20 66-2726
PES BSA Clutch Circlip CL13
PES BSA Clutch Friction Plates (8 per set) CL12
PES BSA Clutch Pressure Plate CL03
PES BSA CLUTCH PUSH-ROD WITH LOCK-NUT CL10
PES BSA Clutch Spring Bolt CL07
PES BSA Clutch Spring CL06
PES BSA Clutch Spring Cup CL05
PES BSA Clutch Steel Plates (7 per set) CL11
PES BSA Clutch support washer CL08
PES BSA Clutch Thrust Hub CL04
PES BSA KICKSTART PINION BUSH 40-3272 57-2682
PES BSA Layshaft Thrust washer 0.078-0.080 41-3072 57-2672
PES BSA Layshaft Thrust washer 57-2671 41-3074 0.083-0.085
PES BSA M20 Clutch Cap Bush 25-4861
PES BSA M20 Clutch Operating Cap 15-4313
PES BSA M20 Gear Control Quadrant Operating Lever Lock Washer 15-4232
PES BSA M20 Gearbox Distance Washer-Hardened and Ground 24-4237
PES BSA M20 Inner + Outer Cover Bolt Locking Strip 15-4246
PES BSA Mainshaft circlip G7
PES BSA Mainshaft Thrust washer 0.070-0.071 40-3119
PES BSA Mainshaft Thrust Washer 0.075-0.076 40-3019
PES BSA Mainshaft Thrust washer 0.080-0.081 40-3120
PES BSA Mainshaft Thrust Washer 0.093-0.094 40-3020 57-2678
PES BSA Mainshaft Thrust Washer 0.098-0.099 40-3126 57-2679
PES BSA Mainshaft Thrust Washer 0.098-0.099 40-3126 57-2679
PES BSA Mainshaft Thrust Washer 0.103-0.104 40-3127 57-2680
PES BSA Mainshaft Thrust Washer 0.103-0.104 40-3127 57-2680
PES BSA Sleeve gear support bush 57-2753P
PES Clutch Basket Bearing CL01A
PES Inner Spacer 3 Speed Sleeve Gear G13 A2D1-12
PES Layshaft circlip G30
PES Machined BSA C15 B40 B25 B44 B50 Spring cup 57-4121 40-3218
PES Machined BSA C15 B40 B25 B44 B50 Spring cup 57-4121 40-3218
PES Mainshaft 4 speed Trials A3D102 TG9 (PES)
PES Rear Sprocket 66 Tooth Grooved (silver) (PES)
PES Splined BSA Clutch Hub G2
Primary Chaincase Felt Washer - BSA M20, M21, M33, A7, A10 42-7504 15-8814
Rear brake pedal fulcrum pin washer (thin)
Rear stand bolt nut (5/16) Thin
Retainer Needle Bearings Sleeve Gear TG3 (PES)
Selector Fork Layshaft A3D110 TG13 (PES)
Sleeve Gear Bearing Retainer A2D1-29 G16 4.3mm PES
Sleeve Gear TG1 Trials
Spacer Needle Bearings Sleeve Gear TG2 (PES)
Suzuki RM125 250 450 Rear Sprocket 49T 1980 onwards Gold
TA17 Unit single trials gearbox
Tank rear support bolt washer
Triumph Kickstart Lever T90 T100 early models - T90,T100,T21,3TA,5TA etc

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