Originally Posted by
arlaunch
I noticed there is an O'ring at the base of the cylinder. Kind of melted and deformed up in the crevice between the sleeve and the cylinder body.
The O'ring is not needed, not many manufactures used them when installing pressed in sleeves. When building big bore motors with oversized sleeves O'rings are not used. Be sure to remove all melted material as it may have contributed to your failure.
"HJ"
’84 YT60
’85 350x (423cc) with ’81 XL500 head conversion
’83 XR500 (628cc) converted 3 Wheel hybrid
’73 CB750 K3 converted 3 Wheel hybrid
’86 TRX250R chassis XR650L engine hybrid
’89 TRX250R (stock )
’90 LT500 Quadzilla
’85 FL350 Odysses ( water cooled head )
Lost (sold) but not forgotten ’80 ATC 110 (205cc on alcohol ) ’83 200x ( 222cc ) ’83 200x ( 185s eng ) ’85 350x ( stock )
added to the collection recently, (2) '70 US90 Aquarius Blue and '74 ATC90 Daytona Orange