Welcome to NSR-WORLD, Zurgel.

You will have to replace the main bearings when the crank is split, as they will be damaged when removing them. Usually, not always though, the big-end bearings will be fine. As Eric says, the crank should be built buy someone with good experience, particularly with NSR and RS cranks, as the components are not indexed, and will need assembling very carefully.

Please keep us updated on your progress.
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Andy.
NSR-WORLD.COM

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