These are Valve Buckets/Tappets from Supertech. They are Standard size and will fit in an OEM Cam Tower. These are shim under bucket shims just like the OEM buckets.
This is for the set of 2 tappets. Singles are the available as well, please click here to purchase single tappet.
These will fit multiple Honda Engines:
-04-05 TRX450R
-06+ TRX450R/ER
-02-16 CRF450R
-05-07 CRF450X