Blue Restrictor Plates: Blue Restrictor Plates must be dated 6/09 or newer to be legal. Effective 4/1/10
Honda 120 Engines
For Thailand produced cylinder heads,casting number TKI-4 (MORE TO BE POSTED SOON) only: Short Raduis must be sharp edged. Minor imperfections may be present on coner between cast port and machined bowl area (short radius) Sharp edges on both sides of port,located between cast port runner and machined bowl must be intact. The intent of this description is to prohibit any attempt to alter the cylinder head ports as received from the manufacturer. NO PISTON POP UP WILL BE ALLOWED.
(See tech manual for more details)
Honda 160 Engines
No Piston pop up will be allowed
(See tech manual for more details)
