head gasket thickness - MVAgusta.net
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post #1 of 11 (permalink) Old 10-11-2016, 04:39 AM Thread Starter
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head gasket thickness

how do you tell which thickness head gasket you have in a f4 750 i heard its marked on a tab. i cant find anything. apart from alto and a triangle with tp init.. i urgently need another gasket as only have 3 weeks till next race meet..im buying an spr motor but need this in the mean time
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post #2 of 11 (permalink) Old 10-11-2016, 05:43 AM
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Isn't there a process to measure the deck height of the head relative to the piston to select the gasket?
Regardless, I think MV only supplies one gasket now.

Could be wrong. Haven't studied it. Speaking from knowledge of a different brand 750 from the late 80's.

All has to do with archiving optimal squish band in the combustion chamber.

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post #3 of 11 (permalink) Old 10-11-2016, 06:16 AM
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There is but you need a specific tool according to the manual. The tabs are the easiest method to ID but Gasket can't see any on his. I know this question is asked often so below is the image from the 750 engine manual under the 2000 S section not the ORO. Document page number is top left of screen grab.
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2000 F4 750

Last edited by Glenno; 10-11-2016 at 06:23 AM. Reason: Fixed picture.
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post #4 of 11 (permalink) Old 10-11-2016, 06:18 AM
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Now the question is if Gasket could ensure/confirm piston to valve clearance would a thinner one be a problem? What are the other risks if the clearance is there?

2000 F4 750

Last edited by Glenno; 10-11-2016 at 06:31 AM.
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post #5 of 11 (permalink) Old 10-11-2016, 07:49 AM
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You can emulate that tool easily...nothing but a dial indicator and a mounting device.

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post #6 of 11 (permalink) Old 10-12-2016, 04:13 AM Thread Starter
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well im going to risk the thinner gasket. the 1.2 is quite easy to get a hold of. it seems it is the one that gets sold as a 750 brutale gasket. all 3 are still sold tho time is of the essence. i cant get them here guaranteed in time. glenno has one so he has kindly offered that and ill replace it when another arrives.. i have been through every avenue i know in Australia and quite a lot of os sites. i can actually get one made locally by a company but price is insane as has to be made.
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post #7 of 11 (permalink) Old 10-12-2016, 05:49 AM
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Quote:
Originally Posted by Glenno View Post
There is but you need a specific tool according to the manual. The tabs are the easiest method to ID but Gasket can't see any on his.
No holes means the medium thickness gasket. The thinner gasket will raise compression and thin out the squish band. Be alert for signs of detonation.

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post #8 of 11 (permalink) Old 10-12-2016, 03:04 PM
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Excuse my ignorance,, but would running 98 help to mitigate this?

2000 F4 750
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post #9 of 11 (permalink) Old 10-15-2016, 09:08 PM
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I'm sure the more practiced people on here will not find this as useful as those of us less experienced.
I took some pictures today for those trying to locate the tab. From what I saw of the one I sent to Gasket the holes are marked by semi circle cutouts of the edge of the tab, not full circles as in the drawing above. Presumably so it can be seen without pulling the head.

The position is left side of the bike under the 1st header.
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2000 F4 750

Last edited by Glenno; 10-16-2016 at 01:28 AM. Reason: Added image
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post #10 of 11 (permalink) Old 10-16-2016, 06:11 AM Thread Starter
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youve done an awesome job Glenno.. I looked for ages for that info, i was looking for actual numbers tho when I was told marked on tab.. now to hope valve doesnt meet piston lol
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