I have an older 650sx 87 or 88 can't remember exactly but trying to upgrade to the cdk 2 38mm carb have the carb and intake was wanting a rebuild kit for it and the gaskets to slap it all on my older engine. The hard thing I'm having trouble figuring out is which intake and carb gaskets to get since theres different ones for the year obviously the carb gasket is bigger. But unsure on intake, I had to have the intake machined out for bigger carb so I'm assuming its still the older model intake?