engine reliability question

[JDH]

I have an 04 trx450r. I was woundering what yall might think my reliability would be if i went with 12-1 compression piston, 500 big bore, stoked crank, and lightened fly wheel ? I would chang oil every four weekend rides and keep the air filter clean.

depeneds on how well the job is done, how lucky you are, and also what kind of parts are used

[MAD450r]

4 weekend rides sounds like your pushing the envelope some. If you build up the motor some and start riding harder you should change oil more often just as a safety measure.

Just my opinion though.