I am rebuilding the top and bottom end of my boy's IT200. All new bearings, rod pin, rod bearing , con rod, piston with fresh bore job etc. I am going to install a hour meter on his bike when finished so how many hours before a top end rebuild is needed and a another bottom end rebuild is needed?? I know there is a lot of variables so I am looking for just a rough estimate. Any one have a good idea?? I am using Yamaha Lube R at 32 to 1 premix. Thanks guys.