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Adjust the power characteristic of your 250/300 two stroke with the optional power valve springs.
| Make | Model | Years |
| Husqvarna | TC 250 |
2014+ |
| Husqvarna | TX 300 | 2017-2019 |
| Husqvarna | TE 250/300 | 2014-2019 |
| KTM | SX 250 | 2007+ |
| KTM | XC/XCW | 2007-2019 |
| Husaberg | TC/TE 250/300 | 2011-2014 |
| Beta | 250/300 RR | All |
