How long will it last?

[xben719]

I was wondering how long you guys think I can except to get out of my top end before I have to rebuild it again. I have a 416kit with a stage 1 hotcam 10.5 to 1 compression. I keep my air filter clean and oiled and change oil filter and oil about every 15-20 hours. I ride about once a week and may do 2 harescrambles a year. How long do you guys have on yours?

[bayou boy]

i have almost 2 years on mine. but it is about time to freshen up the top end