piston swaps???????

[KY250r]

ok i got a 86 250r. i ran a short rod crank with a 86 style piston and no spacer plate when i first bought it. well then it screwed up a rod bearing so i swapped over to a 87-89 style longrod crank with my 86 style piston and a spacer plate. well now we got a new cylinder that ported out and polished. its broed .60 over. i was wondering if i could use a 87-89 style piston .60 over without the spacer plate? or could i run an 82-84 style atc piston in it? all help appreciated cuz i want htis thing done lol!

Ty

[deathman53]

here are the opinions:

1. 86 piston and spacer plate
2. 87-89 piston

[matt250r21]

Here are some more options with the 87-89 long rod

83-87 YZ250 piston with 2mm spacer plate. If you use the YZ piston in a 87-89 OEM cylinder, I think the ring pins need to be moved so they don't catch a port

97-01 CR250 flat top piston with 2mm spacer plate. But you head must be cut right to use the flat top CR piston

[kiesta00]

easiest would be the 87 piston...just pop it on and go!