Some of the cooling fins on my engine have chunks snapped out of them and some are a bit bent out of shape and I don't have the missing pieces it looks like the bike has been dropped by a PO or something. Has anybody repaired there's? Is it an easy job or shall I just replace the cylinder head/ block? Don't really want to spend much money as it's costing me enough to repair the bike as it is so if I can repair that would be better.