Wiseco Piston Numbers

[cactus250]

Guys, I am trying to find out what piston I have in my '87 LT250. Do any of you know the older Wiseco numbers? The number on it is: 5381G. Also, is there any way to tell if this cylinder is an '87 or a newer year? Thanks!

[fiveOnick]

The intake is the obvious way to tell. Does it have a bridge or not.

[cactus250]

I'm going to show my ignorance here but what is a bridge?

[fiveOnick]

Originally Posted by cactus250

I'm going to show my ignorance here but what is a bridge?

88-92
http://photos.everything2stroke.com/...icture_001.jpg

87
http://photos.everything2stroke.com/...69DVC00095.JPG

[Kane]

Wiseco never used a G in any of their ATV/MC part numbers. The old #'s are 534PS through P8(85/86), 552PS through P8(87), and 571PS through P8(88-92). Sudco used a G in some of their numbers but I don't have their book handy to check.