If you have increased the performance of your LUI or J50, you will also need to adjust the translation. Casa Lambretta offers the front sprocket with 13 and 15 teeth. With the LUI the 13er sprocket is used. With the J50/B> there is original the front sprocket with 11 teeth or with 13 teeth. Here it must be upgraded from 11 to 13 and from 13 to 15 teeth.
Possible sprocket combinations and required chain lengths can be found in the table:
table border=1> | sprocket combination | chain links |
| 13/45 | 74 |
| 13/46 | 74 lengthened |
| 13/47 | 75 |
| 15/45 | 75 |
| 15/46 | 75 |
| 15/47 | 76 |
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DE | €
