HCS Snowmobile Forums - View Single Post - throttle body porting
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Old 05-08-2019, 08:57 AM   #6 (permalink)
TommCat Performance
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Join Date: Mar 2005
Posts: 32,633
Current Sled(s): too many
Previous Sled(s): 10 F8, 06 F7, 03 ZR9, 02 ZL6, 98 ZR6, 86 El Tigre 6000
Location: Western Mass
Favorite Riding Area: Maine
Riding Since: 1977

Originally Posted by joe_f7 View Post
So it looks like it's all smoothed out and widened after the butterfly so it doesn't leak air past at idle like a bad bore job on a set of carbs like back in the day.
yep. i polished the area where the blades contact a tiny bit, but dont really remove material there, for that exact reason.
i'd like to do an actual over bore and use bigger throttle plates at some point, but this is a start.

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