Nah, no damage up front...just the motor...ugh! So what's the recommended headkit to put on if I need to rebuild the GP290? ported, 27cc or get another 290 head?
I like the idea of a 2mm stroker crank, and a head modified to take the stroker. But, if you go the ported route, look at all the extra money you will have in the head, then when you break it again, the replacment cost is higher.
Seems to me you have always been satisfied with the power of the 290 stock. If that is really the case, then just another cylinder and piston will do it.
I am just rambling, you decied, it is actually none of my business. Main thing I feel is you should do what makes you happy and what you can easily afford.
Dennis