Cool old othermarket KZ400

This is my brother in laws bike in Costa Rica. Up here in Canada, our insurance rates are stepped at 100, 400, 750,1000cc and over. So I think a 400 four is pretty cool. I guess its a de stroked 550 with a smaller bore, it still has the 6 speed as well.

That's at least the second one posted here. The other one was in the Philippines and later moved back to Norway, then disappeared. It is indeed related to the 550, the other guy upgraded his using 550 parts IIRC.

Very nice bike!

Yes, cool bike.

I think it is a KZ400J model. It uses almost everything the KZ550A has, except the pistons, crank, cylinders camshafts and cam-timing gears. The ignition timing may be slightly different as well.

I think it uses TK21 carbs which are almost the same as the TK22 carbs found on the 550's.

In my signature, I have manuals for that bike along with a note about the valve train which you should be aware of, along with cam timing notes specific to the 400.

Nice 400.
I've never seen one in person.

loudhvx wrote: Yes, cool bike.

I think it is a KZ400J model. It uses almost everything the KZ550A has, except the pistons, crank, cylinders camshafts and cam-timing gears. The ignition timing may be slightly different as well.

I think it uses TK21 carbs which are almost the same as the TK22 carbs found on the 550's.

In my signature, I have manuals for that bike along with a note about the valve train which you should be aware of, along with cam timing notes specific to the 400.

Yes, Aaron said it is a Z400-J. He and my sister ride it 2 up all over Costa Rica and even into Guatemala They own modest properties in both area's and spend the winters there.
good info about the valve maintenance issues, although I doubt he would ever take the cover off, probably better off leaving it alone rather than chance bending valves.