Polaris 440 Case Mod - HCS Snowmobile Forums

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Old 03-29-2007, 03:11 AM   #1 (permalink)
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Here is a link to the 440 Pre Mix Mod. A few guys were asking for something so I threw it together.

This mod has been discussed here before but I finally put some text and pictures together. It is preferrable to split the case to perfor this modification like the Ripperd Mod did but I feel confident that if performed properly your '04 and newer 440 could last for many miles.

We use only Polaris VES Racing oil mixed 28:1. The motors are jetted fairly lean 290-320MJ depending on conditions.

Oil Injection would still be the preferred choice but this mod cost about the price of a base gasket.

Feel free to ask any questions or comments.

Enjoy.

440 PreMix Case Mod
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Old 03-29-2007, 08:15 AM   #2 (permalink)
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great writeup
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INTERNAL MOD---->
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Old 03-29-2007, 11:36 AM   #3 (permalink)
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Very,very, informative!!!!! Thanks for sharing AK
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Old 03-29-2007, 10:12 PM   #4 (permalink)
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Excellent! I have had good success with this also.
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Old 03-30-2007, 10:05 AM   #5 (permalink)
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pin ttt?????????????
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Old 04-02-2007, 10:06 PM   #6 (permalink)
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PIN TTT
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Old 08-12-2007, 12:00 PM   #7 (permalink)
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whats the method of not spliting the case?
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Old 08-12-2007, 05:30 PM   #8 (permalink)
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you cant edit your post on hcs.. any ways so the 06 iq's have the case mod is already done from factory??
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Old 08-13-2007, 07:05 PM   #9 (permalink)
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Freddy

This modification is primarily for the Polaris '04 440, the later years would benifit from this mod as well but it definately isn't needed on '05 and newer 440's unless you expect to put over 3-4 thousand miles on them.

My link explains how to drill this hole without splitting the case, you still have to pull the PTO Cylinder but not split the case. Splitting the case would be the preferred method but this method does work and will last for a long time if you are careful not to allow shavings to enter the water pump gear cavity.

The later modle 440's, '05 and newer do not have to have this mod because they have a revised water pump and crank gear and maybe a revision to the cooling cavity in the case. These revisions basically eliminate the gear failures that plague the '04 440's.
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Old 08-13-2007, 07:09 PM   #10 (permalink)
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heys its guy from dootalk.


thanks alot for you help tom
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