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12-31-2006, 07:32 PM
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#1 (permalink)
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Registered User
Join Date: Dec 2004
Location: Ohio
Posts: 97
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670 vs. 670 H.O.
What is the difference in these two motors? Is it just porting or compression or what?
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01-11-2007, 10:39 AM
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#2 (permalink)
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Registered User
Join Date: Jan 2007
Location: Sweet Valley PA
Posts: 95
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i was told it was the different cam shafts.
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01-11-2007, 11:37 AM
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#3 (permalink)
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King of the Universe
Join Date: Jan 2005
Location: Rochester Hizzle, MI
Posts: 6,188
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Quote:
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Originally Posted by MXZ670Rider
i was told it was the different cam shafts.
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The HO has solid rollers & a very lumpy idle! 
__________________
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2003 AC F5 (Jr's Dec 07 SOTM & 2008 SOTY)
2003 AC F7 EFI SP (April 06 SOTM)
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01-11-2007, 12:46 PM
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#4 (permalink)
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Registered User
Join Date: Nov 2006
Location: Erie Michigan
Posts: 69
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Quote:
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Originally Posted by IndianRvrShiver
The HO has solid rollers & a very lumpy idle! |
Wonder what duration there running  
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03 Ski Doo rev x 800
02 Yamaha vmax 700
02 Polaris edge 600
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01-11-2007, 12:54 PM
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#5 (permalink)
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Moderator
Join Date: Feb 2005
Location: Groton NY
Posts: 10,205
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LOL, cam shaft in a 2 stroke.
Good one there IndianRvrShiver
King of the Universe
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Old Cat Rider
w/ Comet 108 Pro-4 clutch
80 PANTERA 500 F/C w/ Comet 102 clutch
'90 Wildcat Project in progress.
Trail Boss; Dryden to Summerhill trail.
http://www.dcdrifters.net/
Senior Deacon; F&AM Lodge# 472
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01-11-2007, 06:18 PM
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#6 (permalink)
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A god among men
Join Date: Sep 2005
Location: Toronto, ontario
Posts: 2,466
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After market cams for the 670 are available so if you want a more agressive lobe or a longer duration on the intake, that is possible.
Different carbs, gearing, compression, and probably some clutching.
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01-11-2007, 06:49 PM
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#7 (permalink)
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Registered User
Join Date: Nov 2006
Location: INDIANA
Posts: 877
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Man, you guys ain't right!!  
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"If you're not the lead dog, the scenery never changes"
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98 Jag (for the kids)
03 MXZ-X 800 (Blair Morgan)
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01-11-2007, 09:43 PM
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#8 (permalink)
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Registered User
Join Date: Dec 2006
Location: Alberta
Posts: 4
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no, seriously now. what is the difference?
You guys are funny |
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01-11-2007, 10:08 PM
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#9 (permalink)
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Registered User
Join Date: Jan 2007
Location: Sweet Valley PA
Posts: 95
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just for the rcord that wasnt me my buddy was on my comp n put that. sorry guys.
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01-12-2007, 07:35 AM
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#10 (permalink)
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King of the Universe
Join Date: Jan 2005
Location: Rochester Hizzle, MI
Posts: 6,188
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Quote:
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Originally Posted by MXZ670Rider
just for the rcord that wasnt me my buddy was on my comp n put that. sorry guys.
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Good thing you didn't throw your Mom under the bus!!
__________________
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2003 AC F5 (Jr's Dec 07 SOTM & 2008 SOTY)
2003 AC F7 EFI SP (April 06 SOTM)
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02-22-2007, 11:18 PM
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#11 (permalink)
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Registered User
Join Date: Jan 2007
Posts: 29
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the Ho is ported and poished from the factory and i think the carb MM is larger as well is the only difference ive read about the two motors. also larger exhaust ports on the HO motor
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02-22-2007, 11:19 PM
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#12 (permalink)
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Registered User
Join Date: Jan 2007
Posts: 29
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And UMMMMMMM the camshaft thing ill LEAVE ALONE LOL
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