I have a 2004 TRX450 with Honda cams. I picked it up used (slightly). I was wondering how long I should run between top end rebuilds. Also, how long do you suggest between bottom end rebuilds? Thanks in advance
check the valve lash periodically to monitor valve condition. when the valve lash has to be adjusted frequently, that is the tell tell sign that the valves need to be replaced. chang the oil regularly and inspecting the oil filter for signs of thrust washer material. if no signs of material are in the filter, ride.
rebuild intervals will vary by machine, rider, and maintenance.
It Depends on how you ride it hinestly. This sounds crazy but I change my oil after any hard rides day long rides and as OCP said check the oil filter. Ever if you din't change the oil just two 8mm Bolts pop the filter out after every other ride and check it out for metal flakes. I would recomend running some Rotella in it too. It's very goood oil, it's cheap, high on zinc and phosphorus also cheap Diesel Oil.