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81.25 bore...better to use Cometic 81 or 81.5mm ?

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Old 07-11-2006, 05:31 PM
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Default 81.25 bore...better to use Cometic 81 or 81.5mm ?

I have a 81.25mm bore...should I use the Cometic 81mm head gasket or the 81.5mm? They do not make a 81.25mm one. The pistons that I will be using will not stick out of the head so I hope that piece of info helps....it is .014 in the hole. Thanks
Old 07-11-2006, 06:51 PM
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use the 81mm
i have a 81.50 bore and im using a 81mm headgasket.
no problems
Old 07-11-2006, 08:11 PM
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Default Re: 81.25 bore...better to use Cometic 81 or 81.5mm ? (PickleTeg)

The stock head gasket will accomodate an 81.5mm bore, no problem
Old 07-11-2006, 08:34 PM
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been hearing a few problems from cometic latley wonder if its true never actually seen any in person...but yeah stock would work great for yoyu.
Old 07-12-2006, 07:30 AM
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Default Re: (lvcrx)

I'm using an OEM 84mm on a 84.5 bore. Yes its a larger bore but its the same concept. If it will work for 0.5 sizes overbore it will also work for 0.25
Old 07-12-2006, 07:58 AM
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i have a 81.25mm also, and i use the oem honda 81 one with no problems.
Old 07-12-2006, 10:24 AM
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Default Re: (candy eg)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by candy eg &raquo;</TD></TR><TR><TD CLASS="quote">i have a 81.25mm also, and i use the oem honda 81 one with no problems.</TD></TR></TABLE>
didnt you blow that motor?
Old 07-12-2006, 02:47 PM
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Default Re: (racerx023)

I guess what I am asking is since the 81mm OEM gasket is actually 82mm, are the Cometics the same way ie....the 81mm actually an 82mm, the 81.5 actually a 82.5........you all see what I am getting at?
Old 07-12-2006, 10:43 PM
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Default Re: (PickleTeg)

how about 81.75mm bore? oem gasket okay?
Old 07-13-2006, 09:04 AM
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Default Re: (Coyote1800cc)

the best thing to do is call Cometic and ask them. 1-440-354-0777
Old 07-13-2006, 07:43 PM
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Default Re: (racerx023)

Thanks...I will do that.
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