A few of us noticed that Polaris has upgraded (increased the size) of the crank bearing on the monoblock XLT engine and has added an oiling line to that bearing. One of our group is bummed that his XLT Limited SP doesn’t have the “XC Motor” which he claims is this updated crank bearing/oil lined engine. Further, another of our group found his XLT SPs does not have the oiling line. It appears some have them and some don’t. This sounds real fishy to me. Why do they need direct oiling of their crank bearings when most of the other MFGs don’t?
There are actually several different versions of what we all refer to as the “XLT engine”, or “600cc monoblock”. The ’97 XC 600 uses a unique PL08 cylinder block, while the XLT Specials use a PL04 block, and the rest of the XLTs use a PL03 block. All indicating a different level of port timing. The PL08 was the first version to use the extra PTO bearing oiler – the logic being that this was the most likely one to have pipes installed and be spinning at a higher RPM – nothing more.