differences between 800 and 800HO engine - ArcticChat.com - Arctic Cat Forum

PROCROSS F/ZR/ElTigre/RR 2012 + chassis, Not C-Tec2 talk.

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Old 02-17-2017, 12:50 PM   #1
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differences between 800 and 800HO engine

Does anyone know what the actual differences are in between the pre-2010 800 and the 2010 and up 800 HO? Curious what parts interchange, is it just porting and fuel differences or is it deeper? If I were going to build a motor, can I start with the older case and crank and just put the newer 98B4 cast jugs on it and it would be a HO if put into an HO sled with the EFI of the same? Curious, thinking about building another engine is all, just wondered.
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Old 02-18-2017, 08:02 PM   #2
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No parts that I'm aware of will interchange.
If memory serves me:
The deck height is different.
Cylinders are different
The crank bearing diameters are different.
The crank itself is a light weight crank and completely different.
The pistons are different
The head is different

And I'm sure there are many other things.
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Old 02-19-2017, 07:20 AM   #3
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Thanks. I figured there must be differences to them.
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