Engine Work?

Right now i'm running a 2000 WR400 with a Wisco 94mm piston, so my motor is now 417cc. It put down 44.3 hp on a dyno earlier this year. I'm considering going up to a higher compression piston, hot cams, rebuilding the head & porting it and of course tuning the jetting. I'm running a titanium scorpion exhaust system currently. This bike will be used for road racing with CCS since I have it converted to a supermoto. Anybody have any idea how long this motor will last? I'm fairly new to the dirtbike game, so I'm not sure how fragile a motor like this is. Anybody have any idea what kind of power numbers it could put out if i were to go with this setup? Suggestions?

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