We have completed testing of the valve train components for the TRX450.
Valves, guides, and spring kits are now available.
For those who don't know- Honda has used a mild steel intake valve on the TRX450, as opposed to the titanium piece on the CRF450. Unfortunately, they left the spring pressure the same. The only way to make that work is to turn the the volume down on the loud pedal, er lever. It no longer goes to 11. (Spinal Tap fans will understand)
Anyways- if you are planning on pushing your TRX past the stock engine's ability to rev, I would suggest upgrading the spring kit.
Best To All
Mike Perry
R&D Dept
Kibblewhite Precision Machining Inc.
PS- Yes we are working on the RMZ/KXF and the CRF 250s,
and even some new Husky stuff!