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cometic

THIS MUCH WE KNOW! HOW TO DEAL WITH A CATASTROPHIC YAMAHA YZ250 BLOW-UP

She gave up the ghost and we set out to revive it. Engines blow up! It’s a fact. You can?t avoid it. But, you can be prepared with enough knowledge to know what to do when your bike lets you down at the least opportune time. The MXA wrecking crew has a 2007 Yamaha YZ250 that we built as a project bike several years ago. We use it to test parts, mods and aftermarket accessories. Sadly, it blew up. We didn?t need to call in Scotland Yard to find the culprit in the explosion. The test rider admitted that h…

WE RIDE CYLINDER WORKS’ BIG-BORE HONDA CRF501

When it comes to building or rebuilding a Honda CRF450 , the MXA wrecking crew has several options. First, we could go with OEM-spec engine parts for a freshly rebuilt 450cc engine. This is the most common rebuild, and it breathes new life into a tired warhorse. Second, we could take the opportunity during the rebuild phase to add a little extra oomph to our CRF450 by going to a fairly straight-forward big-bore 470cc kit with a new cylinder, rings and piston. We could have done either of these things, b…