FZR 400 with YZF 600 engine, which radiator ?

[Jamezzz]

damn, guess ill have to keep a close eye on the temp guage if i ever get the bike on the road

[thatkid]

If and when the bike overheats, the white metals will suffer first, Pistons, Big End Bearings, and Main Bearings. That damage is permanent, and will result in lower oil pressure, other components will suffer from lack of oil supply.

Id go the cheapest way Upgrade the radiator. Unless you have wads of cash and a source of engines/spare parts!