i saw a set of 8jo-11631-00-93 pistons woth two holes on the skirt, are these real early or late ones? all the rest ive seen dont have any. thanks awsome site
YAMMIEGOD3:16
Active member
THOSE ARE YAMAHA 78-80 std bore SRX 440 PISTONS. I DON,T RECALL TWO HOLES ON THE SKIRTS. 3:16 (yammie tony)
dynofun
New member
- Joined
- Nov 14, 2005
- Messages
- 355
Somebody boost ported it. Used to be done years ago. You cut grooves in the cylinder wall above the intake port and holes in the piston skirt so there is over lap in filling the cylinder.ramblnman said:
yamaha one
New member
if boost ported the holes will be just about 1/4 inch under ring
hman
Member
I bought them and will post some pics of them when they show up but from the pics i seen they were just below the ring groove. hman.