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| Item No. | Part No. | Description | 490 |
|---|---|---|---|
| 1 | 8027 | Crankcase right hand 490 | 1 |
| 2 | 8026 | Crankcase left hand 490 | 1 |
| 3 | 8030 | Crankcase gasket | 1 |
| 4 | 8023 | Clutch case gasket | 1 |
| 5 | 8024 | Clutch cover 250/490 | 1 |
| 6 | 8025 | Oil plate | 1 |
| 7 | 8031 | Oil plate | 1 |
| 8 | 400 | Oil drain plug complete | 1 |
| 9 | 410 | Sealing ring A 14x18 Din 7603 | 1 |
| 10 | 8284 | Crankshaft cpl 490 | 1 |
| 11 | 8067 | Needle bearing 25x31x20 | 1 |
| 12 | 8290 | Inner ring 25x31.45x13 | 1 |
| 13 | 8175 | Oil seal 18x24x3 | 1 |
| 14 | 8121 | Bearing output shaft 3205 2RS C3 | 1 |
| 15 | 8126 | Ball bearing mainshaft 6204 ZC3 | 1 |
| 16 | 6813W | Piston 86.42 Wiseco | 1 |
| 17 | 6814W | Piston ring std 86.5 | 1 |
| 18 | 8501 | Wrist pin 18x46 | 1 |
| 19 | 536 | Piston pin clip | 2 |
| 20 | 8302 | Cylinder cpl 490 | 1 |
| 21 | 8297 | Cylinder sleeve 490 83-84 | 1 |
| 22 | 8301 | Cylinder head 490 | 1 |
| 23 | 7461 | Cylinder head gasket 490 83-84 | 1 |
| 24 | 7462 | Cylinder base gasket 0.3 | 1 |
| 25 | 6796 | Reed valve cpl | 1 |
| 26 | 6797 | Reed valve body | 1 |
| 27 | 6798 | Reed valve petal | 1 |
| 28 | 6799 | Reed valve stop | 1 |
| 29 | 6810 | Intake reed gasket | 1 |
| 30 | 8101 | Clutch housing cpl 490 | 1 |
| 31 | 8094 | Clutch gear 66T 490 | 1 |
| 32 | 8082 | Fiber clutch plate | 6 |
| 33 | 8083 | Steel clutch plate | 6 |
| 34 | 8084 | Pressure plate | 1 |
| 35 | 8087 | Clutch bearing | 1 |
| 36 | 8089 | Clutch push rod | 1 |
| 37 | 8091 | Needle roller | 1 |
| 38 | 8092 | Clutch nut lock tab | 1 |
| 39 | 8100 | Clutch body | 1 |
| 40 | 8071 | Clutch spring 490 | 6 |
| 41 | 8105 | Clutch spring bolt | 6 |
| 42 | 8070 | Crankshaft gear 31T | 1 |
| 43 | 6803 | Primary chain single row | 1 |
| 44 | 8306 | Mainshaft 15T F | 1 |
| 45 | 8307 | 2nd gear MS 18T F | 1 |
| 46 | 8340 | 3rd gear MS 21T FL | 1 |
| 47 | 8332 | 4th gear MS 24T FL | 1 |
| 48 | 8148 | 5th gear MS 25T C1 | 1 |
| 49 | 8316 | 1st gear OP 31T F | 1 |
| 50 | 8317 | 2nd gear OP 28T F | 1 |
| 51 | 8329 | 3rd gear OP 25T FL1 | 1 |
| 52 | 8335 | 4th gear OP 23T F | 1 |
| 53 | 8242 | 5th gear OP 22T CD1 | 1 |
| 54 | 8237 | Output shaft | 1 |
| 55 | 8216 | Shift drum 490 | 1 |
| 56 | 8214 | Shift fork A5 | 1 |
| 57 | 8215 | Shift fork H5 | 1 |
| 58 | 8184 | Shift crank | 1 |
| 59 | 8185 | Shift lever 83-86 | 1 |
| 60 | 8187 | Shift shaft 83-86 | 1 |
| 61 | 8195 | Shift return spring | 1 |
| 62 | 8197 | Shift ratchet dog | 1 |
| 63 | 8198 | Spring pin | 1 |
| 64 | 8200 | Pressure spring | 1 |
| 65 | 8201 | Shift fork spindle | 1 |
| 66 | 8204 | Pawl screw | 1 |
| 67 | 8205 | Detent spring | 1 |
| 68 | 8206 | Detent pin | 1 |
| 69 | 8207 | Shifting cam cover plate | 1 |
| 70 | 8164 | Kickstarter joint | 1 |
| 71 | 8165 | Kick pivot bolt | 1 |
| 72 | 8171 | Kick ratchet | 1 |
| 73 | 8172 | Pressure spring for kickstarter gear | 1 |
| 74 | 8173 | Spring cup | 1 |
| 75 | 8174 | Kickstarter return spring | 1 |
| 76 | 8176 | Thrust washer | 1 |
| 77 | 8177 | Kick shaft bearing | 1 |
| 78 | 8265 | Kickstarter idle gear | 1 |
| 79 | 8266 | Needle bearing 18x22x100 | 1 |
| 80 | 8267 | Kickstarter shaft | 1 |
| 81 | 8268 | Circlip 18x1.2 | 1 |
| 82 | 8269 | Kickstarter ratchet gear cpl | 1 |
| 83 | 8250 | Sprocket 13T | 1 |
| 84 | 8255 | Crankshaft nut SW 32 | 1 |
| 85 | 8278 | Hexagon nut M 16x1.0 | 1 |
| 86 | 8279 | Clutch lever welded | 1 |
| 87 | 8283 | Clutch return spring | 1 |
| 88 | 8298 | Decompression rel valve cpl | 1 |
| 89 | 8325 | Carburetor cpl V54-2 0 40 490 | 1 |
| 90 | 681 | Spacer tube | 1 |
| 91 | 3143 | Rubber flange | 1 |
| 92 | 683 | Clamp | 3 |
| 93 | 343 | Rubber sleeve | 1 |
| 94 | 603 | Spark plug | 2 |
| 95 | 8379 | Exhaust welded 490 | 1 |
| 96 | 8382 | Silencer cpl 490 | 1 |
| 97 | 7465 | Intake elbow 490 ALUM | 1 |
| 98 | 7467 | Intake flange 490 rubber | 1 |
NOTES:
1983 490 uses F-series gearbox (8306-8335) — different from 250
New cylinder head gasket 7461 (490 83-84)
New cylinder sleeve 8297 (490 83-84)
Decompression valve standard on 490
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