KEC400/21 pistons

JDman21 · Post by **JDman21** » Tue Mar 07, 2006 7:41 pm

What is the standard piston size for a KEC400/21 engine. I think its out of a 74 JDX6. Ordered pistons and was sent two different size pistons.

400brian · Post by **400brian** » Tue Mar 07, 2006 9:21 pm

I looked in the specs section on the home page.
'74 X6 is listed as having a 63mm bore.

bverboy · Post by **bverboy** » Sun May 12, 2013 10:28 am

i had 63mm std pistons on my 1975 jd 800!!!!!. how does this work??

JDT · Post by **JDT** » Mon May 13, 2013 11:03 am

The bottoms of the CCW engines are all the same.
The tops are different: ie heads, cylinders and pistons.

Someone switched them around in the past. They put 400 top on a 440 bottom.

I have even seen a 440 top on one side and 400 top on the other. And it was a running engine.

bverboy · Post by **bverboy** » Mon May 13, 2013 7:01 pm

thank you jdt.