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Use TRX450r bottom end for E-start XR400?

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There's a guy parting out a TRX 450r. Is it something that I can use to change a 2003 XR 400 to Estart? I have never even seen a TRX so I have no idea if this is an impossible task, or what.

Pls let me know if this is doable, and just how doable. Thanks!

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There's a guy parting out a TRX 450r. Is it something that I can use to change a 2003 XR 400 to Estart? I have never even seen a TRX so I have no idea if this is an impossible task, or what.

Pls let me know if this is doable, and just how doable. Thanks!

trx450 is crf450 based. you need the trx 400 that is xr400 based for it to work.

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There's some good priced 400 bottom ends on fleabay at the moment. A lot of wrench time but those that have done it seem pleased with the results.

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