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400EX bottom end

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I've heard of some guys swapping out 400EX bottom ends to get electric start, but that the gear ratio is different and it also has a reverse gear.

 

How exactly does the reverse gear work? Does it replace 1st with reverse, like you click down to go into reverse?

 

How different is the gear ratio? Good/bad for street use?

 

 

Thinking of doing a big bore and either swapping in a 400EX bottom end or just the crank part.

 

 

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I just used the crank and gear from the trx had to spilt the cases anyway and I heard you need to move mounts to fit a trx bottom end.

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Oh I thought it bolted right up. Definitely will just do the crank and starter then.

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