Phone (360)805-0272  FAX (707)248-0726  E-Mail: sales@thumperstuff.com

Review the parts listed below. Enter part numbers and prices for those items you wish to order on our printable order form, or call us direct at (360) 805-0272 between 10:00 a.m. and 4:30 p.m. PST. For details go to How To Order. Have some suggestions or comments? Go to our feedback page!

Due to the age of the bikes we sell components for, some parts may be temporarily or permanently unavailable. We are currently in the process of updating and verifying our parts lists. We apologize for any inconvenience this may cause.

Manuals, Tools, Misc. / Engine Components / Pistons / Carburetors / Exhaust Systems & Supplies / Suspension & Frame Supplies / Shock Absorbers / Brakes / Drive / Controls / Brake Lines / Electrical / Chassis & Body / BSR Components / Polishing

MANUALS, TOOLS, MISC.

GB500

CHAIN BREAKER: You could use a file, but it takes forever

1005
$28

DEGREE WHEEL: Made of aluminum, a "must" for setting up engines

1013a
$18

FLYWHEEL PULLER:  The right tool for the job

3010
$15

MANUAL, FACTORY SERVICE, 

4025
$50

MANUAL, OWNERS, 

4025H
$25

RIM SAVER: Slips easily over alloy rims for changing tires, protects finish

1015
$10

ENGINE COMPONENTS

GB500

CAM CHAIN, STANDARD

4108
$66

CAM, PERFORMANCE, STREET, Megacycle,  Needs spring kit.   No core required.  On c.c., see below

4120
$299

CAM, PERFORMANCE, RACE, Megacycle, Needs spring kit,  On Customer Core.  On billet cam, see above

4121
$219

CANISTER ELIMINATION KIT (racing applications only)

4136
$24

CLUTCH FRICTION PLATE KIT, STANDARD: Equivalent to original

4161
$74

CRANKCASE BREATHER, K&N: Race application

1193
$25

CYLINDER SLEEVE: Standard to + 1mm

4119
$88

GASKET SET, COMPLETE ENGINE: All the gaskets you'll need for your engine.

4140
$91

GASKET SET, TOP END: All that is required for a "top end" job.

4141
$75

GASKET, EXHAUST: Replace them every time you loosen your head-pipe.  Price each

4144
$2

MAGNETIC DRAIN PLUG, Capture flakes of metal in your engine, NEW LOWER PRICE

4134
$12

OIL FILTER, O.E. EQUIV., 6-PACK: You can't change them too often

4150
$16

OIL FILTER, BETTER QUALITY: Provides better filtration than O.E.

4151
$7

OIL SEAL SET, Whole engine

4149
$31

PISTONS

GB500

BORE, STOCK, mm (Ref.)>

92mm

FACTORY ORIGINALS

PISTON & RINGS, STD BORE, !st over

4137
$150

RING SET, FACTORY, specify size

4109
$59

RING SET, WISCO, specify size

4109A
$27

VALVE GUIDE SEALS (set)

4128
$10

VALVE GUIDES, HIGH PERFORMANCE (set)

4127
$95

VALVE SPRING KIT (alloy retainers)

4125
$155

VALVE SPRING KIT, with GUIDES (alloy retrainers)

4126
$235

VALVE SPRING KIT, with GUIDES (titanium retainers)

CARBURETORS

GB500

FILTER, AIR, Stock

4210
$48

EXHAUST SYSTEMS and SUPPLIES

GB500

4301
Call

SUSPENSION & FRAME SUPPLIES

GB500

FORK BELLOWS,  Honda original.  Price per pair

4910
$75

FORK SEALS, O.E. EQUIV.: Make those oozing forks good as new. Price per pair

4405
$10

FORK SEALS, LOW FRICTION: Less initial drag means a smoother ride, $ per pair

4407
$25

FORK SPRING: Progressive spring rate, reduce "bottoming" Price per pair

4401
$82

FORK SPRING KIT, (springs, oil & best seals): Give that sagging front end a boost .

4450
$100

FORK TUBES (hard chromed,centerless ground)  Special Order

4454
$243

SHOCK ABSORBERS

GB500

BASIC SHOCKS, WITH SPRINGS., "fair" quality.  No spring options

1418
$85

"PROGRESSIVE", MAGNUM: "Better" quality, improved ride/handling. Black springs

1424
$268

"PROGRESSIVE", MAGNUM: "Better" quality, improved ride/handling. Chrome Springs and Cap.

1424C
$296

IKON - formerly KONI.  Quality, improved ride/handling. Chrome Springs and Cap.  Adjustable spring and damping.  No spring selection at this time.

4424
$348

SPRING SELECTION for SHOCK ABSORBERS

NO.

#1

#2

#3

#4

BRAKES

GB500

BRAKE PADS, FRONT

4514
$33

BRAKE SHOES, REAR DRUM (O.E. EQUIV.) .

4512
$25

MASTER CYLINDER, REBUILD KIT, Specify front/rear.  SR front only.

4531
$24

CALIPER REBUILD KIT

4532
$26

CALIPER PISTONS, Per Pair

3533F
$38

GB500

Standard chain
&
sprocket data ---------->

CHAIN DATA, Size:

525

No. Links:

108

SPROCKET DATA, Front:

15

Rear:

37

CHAIN, DRIVE, O-RING, STANDARD: Strength similar to factory equipment

4542
$75

SPROCKET, REAR, STANDARD SIZE, ALUMINUM

4553
$47

SPROCKET, REAR, +2 TEETH, ALUM., Pulls better, quicker acceleration

4554
$54

SPROCKET, REAR, -2 TEETH, ALUM., Slows engine RPM, better mileage

4555
$47

Note: Selected chains are appropriate to engine displacement and horsepower, per chain manufacturers recommendations.  All chains are provided with extra links to accommodate various ratios, therefore a chain-breaker will be helpful.

CONTROLS

GB500

CABLE, CLUTCH - Out of stock, trying to get more

4610
$30

CABLE, TACHOMETER

4616
$17

1CABLE, SPEEDO (XT,'76-'79= -A,'80-'81= -B)

4615
$16

"EASY CLUTCH": Adds mechanical advantange, pulls heavy duty springs easier

1625
$38

GRIPS, WRIST SAVER, Soft molded palm "blade" for relaxed grip

1608
$16

LEVER, FRONT BRAKE

4621
$8

LEVER, CLUTCH

4620
$8

BRAIDED STAINLESS STEEL BRAKE LINES

GB500

BRAKE LINE, FRONT, BRAIDED STAINLESS STEEL 

4504
$64

ELECTRICAL

GB500

BATTERY ACID CATCH TANK: Keep battery acid off of your paint and frame

1705
$6

TURN SIGNAL LENS

4721
$5

CHASSIS, BODY

GB500

WIND SHIELD, CAFE STYLE, handlebar mount

1860
$59

"BSR" COMPONENTS
("BSR" refers modifications to somewhat resemble a British BSA)

GB500

"BSR" TAIL LIGHT KIT, POLISHED CAST ALUMINUM BODY, Drilling required.

1902
$42