I read about the head gasket mod for triples. Can the same thin be done with a factory twin head gasket or do I need to purchase an aftermarket gasket?
no you can do the same with the stock one.
blkmax600
New member
I did my 600 twin this fall, I bought a new stock gasket from yamaha and removed the center layer, I also installed reed spacers. throttle response seems to be much better.