Snowmobile Fanatics banner

1 - 5 of 5 Posts

·
Registered
Joined
·
57 Posts
Discussion Starter · #1 ·
With the bed compression in my indy 400, I was told to put a wiseco piston kit in it. Is it even worth it and how much more power will it give me? Also should I keep it stock or should I bore?
 

·
Registered
Joined
·
2,731 Posts
I highly doubt putting in only new pistons will magically cure bad compression. I suspect cylinders would need to be bored ($$$) and then get wiseco/oem pistons ($$$). Might be better off buying a whole motor (400, 440 or 500 will drop right in without modifications) for less than $250. But then again, it's an 89 400, you don't want to dump a ton of money in it. A mint one would sell for $500-$600 tops in the late fall, or 200-300 bucks now. YOU are the one that has to decide if it's worth it or not.

A wiseco kit won't give you any more power than stock-from-the-factory pistons. But obviously it will give you a running motor seeing as yours currently has bad compression.
 

·
Registered
Joined
·
1,458 Posts
Prob just need rings. But if your pistons are out of spec due to high mileage, then replacing them is a good idea. Dont bother with oem, too pricey, and stay away from wiseco unless you have your cylinders redone to fit them exactly.

Expensive pistons wont give you any extra hp, but fixing the comp issue will help.
 

·
Super Moderator
Joined
·
11,279 Posts
Get some SPI pistons off ebay,good quality and cheap. Take the motor apart to see what it all needs before ordering any parts though.
 

·
Registered
Joined
·
564 Posts
How many miles does that motor have?? One of the guys in our group has around 9000 on his and it runs like a top, also I have been told to recheck the compression when the engine is hot, see if its any better after running before you go tearing it all apart.
 
1 - 5 of 5 Posts
Top