I have just changed the gearing on the bike from stock 14/47 to 14/49 and the chain is being held up by the chain guide now do to the larger back sprocket. Has other owners found this a problem as it looks like the guide will wear out a lot sooner now. I know this was a problem on the KXF450 2009 bike and Kawasaki changed the guide on their 2010 bikes. Does anyone have a good fix for this or can you buy a more suitable guide, and if so can anyone recommend a good one cheers.