well i sure hope it isnt tha bad i am confident that when i replace the crank it should be ok but just to be sure what would be a good route to go in finding out if my case has this problembgkid2966 said:Just my thoughts on the subject of the Polaris tripples. I did a lot of investigating after rebuilding one with a rebuilt crank new rods and pistons and having it go under 200 miles and spin the bearing in the case. The extra oil line did help some but did not fix the initial cause of the problem.
If you take the bottom half apart make sure to check the main bearing bores. The Polaris tripples tend to oblong the crankcase on the PTO side. This is what causes them to tear up the bearings. It is not caused by not having the extra oil line as many people think. Polaris put the extra oil line in as a fix and they still had some with the same problems.
This is just the information I found after hours and hours of research and conversations with a couple of performance engine builders.