Do they really work? Do I need one? Those that I have seen installed are installed in place of the sprocket guard...is that safe? It seems like the sprocket guard is more likely to get some use than a case saver. Thoughts?
I have not needed mine yet. I do have a case saver on mine. The stock product is junk. Check out being star or lone star racing. They make some nice one. I have seen a chain thrown with the stock guard. The case was junk.
I read about them...
I bought an aluminum case saver, but read that metal ones can be hit by the chain and then bust through the case still.
Polyurethane is the way to go apparently.
I didn't feel like spending $40 on one, so i bought some urethane and made my own...
In my experience - if the chain is a quality chain (price usually = quality) and the sprockets are in good condition (new sprockets installed at the same time as a new chain) and the chain is adjusted properly and the suspension is maintained (axle and swing arm bearings serviced regularly, throughly and properly) - a case guard may not be needed. I have never broken a chain, so I can't say, but I have repaired many engines that got intimate with a chain and the cause was poor or no maintenance to the drive line. BTW - I have the OEM "chain guide" on my engine.
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