Ok a pretty good source over at thumper says this is the 2010 yz450f .... With fuel injection at the front of engine, exhaust straught out the rear of the head, cast alloy bolt together frame ,electronicaly controlled rear shock,
Dunno may just be rumour but a pretty cool concept
OOOPPPS just read MR YAMAHA Isnt happy about pics getting out so have removed them
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