Newbee here,
I have a problem I hope those here can help. I recently purchased a blaster with a non running yz 490 in it. I find out that not only did the rings siezed up but the piston skirt is gone on one side as well as the bottom of one side of the cylinder sleeve is gone as well. The engine case number suggests its a 1986 motor. My question is, can I use the cylinder even though its missing part of the sleeve? Not sure if its needed for support or not? If not then I have an opportunity to purchase a used 1982 cylinder and head combo, but not sure it would fit my 86 case? Is there any way to cheaply solve this or any other yamaha engines that interchange with my 490? Or do I give up and look for a different engine? Very confused! Look forward to a reply. Thanks.
I have a problem I hope those here can help. I recently purchased a blaster with a non running yz 490 in it. I find out that not only did the rings siezed up but the piston skirt is gone on one side as well as the bottom of one side of the cylinder sleeve is gone as well. The engine case number suggests its a 1986 motor. My question is, can I use the cylinder even though its missing part of the sleeve? Not sure if its needed for support or not? If not then I have an opportunity to purchase a used 1982 cylinder and head combo, but not sure it would fit my 86 case? Is there any way to cheaply solve this or any other yamaha engines that interchange with my 490? Or do I give up and look for a different engine? Very confused! Look forward to a reply. Thanks.
