The Doo bars last a long,long time.I stick with what works.The bars that came on my new mxz 500 lasted about 300 miles.I asked the dealer what the deal was,he said the bars that come on a new sled are "starter bars" and don't last at all,so I bought the Bombardier replacement bars and they lasted 2600 miles,and were still good when I traded the sled in last spring.
Bottom-lines are nice. They have flat-tops like woodys, but come in 75 degree inserts that are just as sharp as 60 degree but have more cross-sectional area and wear better. Also they space the inserts a bit so that if the bar flexes they won't tend to pop the inserts out. As a bonus they have twice the wear pads front and rear.
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