Thank you for allowing me to join the group.
I've been riding for well over 25years started with Honda big red the last quad I owed was a Suzuki LT500R had it when I was 15 sold it when I was 17 I just bought my 1988 Honda trx250R it was used for racing all its life with tons of mods from the exhaust fmf to the cool head which I was given the head that is in it now (not sure which size) plus a dome marked 18 for it.
It has a Keihin flat slide carb and is bored 30 over as well.
I'd like to know what do I need gaskets o-rings to change from the dome in it to the 18
08-26-2019, 09:24 AM
Sometimes the shell needs to be resurfaced flat, that is internally on the dome sitting shelf. These shells get Hobbed over extended use, and when a new square & flat dome is installed; they tend to leak or fail.
Otherwise; you just need to order a new 18CC dome, it will come with two new o-rings. Plus a new OEM Metal head gasket.
My suggestion is always perform a UCCR when changing compression or fuel or both...safe is Best IMO.