RMZ-250(2007) Valves, Replace or not?!

[csimmi]

Hej guys! I have an RMZ-250(2007), 80-90 hours in it(approximately) but it is a hobby bike. Last season was my first in MX. This year im a bit better. Im asking for some help! Its for sure that I have to adjust the valve clearance but Im wonder that I need to replace them at all? And what about the piston? Should it be replaced or what determines the replacement of the piston or the valves? thanks in advance
adam

[DRGSin393]

I slept at a Holiday Inn Express last night. Ill give it a stab. Def check the clearances on your valves. You wont need to replace them unless theres something wrong with them or you want to upgrade them to a better quality valve. A compression check will tell you if your rings need changing and you can mic the piston to check if youre within normal specs.

[pjg351]

With that amount of hours on your bike, and intending to race it. I would definatley replace the piston and at the least shim the valves if required, but for peace of mind i would replace them as well and the valve springs, if your going to race the whole season.