RD400 'Motopaika'...Yeah I'm back.

Yes its for cooling, that duct and a special one piece head. they were only on the later 400's cylinder head temps kill rd's. that was yamaha's last attempt befor the water cooled 350lc & rz's/banshee

bike looks rad glad your back congrats on the big win
you still selling those dry fuel break fittings
Those Rd look so fun.. One day. Keep it up, I like it.

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