Luigic81 Posted April 11, 2010 Whats different internally between the 510 and 450 (SMR)? Is it just the crank and con rod? Is the diffferent con rod what leads to rod failure in some 510's? In theory could one replace the rod and crank in a 510, with a 450 rod and crank and basically have a SMR 450? Thansk Share this post Link to post Share on other sites
