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Buell Forum » Quick Board Archives » Archive through May 15, 2005 » Holes on top of engine « Previous Next »

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Nemster
Posted on Friday, May 06, 2005 - 02:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
What are these for? I was wiping down my S-1 and noticed the square spaces on the tops of each cylinder. I am guessing for airflow purposes??
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Cataract2
Posted on Friday, May 06, 2005 - 07:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
I've always wondered that myself. I would think it would be better to close them up.
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Rockbiter1
Posted on Friday, May 06, 2005 - 07:37 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
Many evo-based rocker covers have that verticle hole. I can only figure its for airflow to the center of the head, but there are no cooling fins there, so extra airflow woulddn't help much, would it?
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Aaomy
Posted on Friday, May 06, 2005 - 07:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
i think the one your talking about is the access hole for dual plugged head. to run the wire threw and change that plug. also will allow rising hot air to "vent" when the bike isnt moving.
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Nemster
Posted on Friday, May 06, 2005 - 01:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
And I thought I was just asking a stupid question again!!
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Blackbelt
Posted on Friday, May 06, 2005 - 02:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
On the FI bikes, like my X1 it is where the temp sensor goes... just FYI
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Sportyeric
Posted on Saturday, May 07, 2005 - 02:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
Cycle World, a few months ago, did an issue on V-Twins and traced their development. One of the things they gave the Harley engine credit for was the cooling of the head that is possible with pushrods and isn't possible with overhead cams. With just the rockers up there, you can have such a hole in the rocker covers for airflow.
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Rageonthedl
Posted on Sunday, May 08, 2005 - 09:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
TC motors dont have the hole
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Sportyeric
Posted on Monday, May 09, 2005 - 03:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
That's cause the guys that ride TCs never rev them over 2000rpm.
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Sportyeric
Posted on Monday, May 09, 2005 - 03:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
No Sorry. I shouldn't have done that. LOL
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Smoke
Posted on Monday, May 09, 2005 - 06:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
hey sportyeric,
you should have said "most" and you would have been accurate. Ha!
tim
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Rockbiter1
Posted on Monday, May 09, 2005 - 07:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
Thats another thing i wonder about...I see guys build a sweet 95" TC, put in the 6200 rpm ignition module, and then deliberately not go above 2500 rpm. Why go big bore, if you don't use it? i just don't understand...

MY TC88 gets to use its upper RPM band...quite a bit actually : )

(Message edited by rockbiter1 on May 09, 2005)
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Blublak
Posted on Monday, May 09, 2005 - 12:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)
Funny you should mention that.. I seem to have 'bumped' my limiter Saturday on my Fatboy.. Damn.. who'd have thought you could get that big TC95 to miss a beat like that? heheheheh.. Ok, I was probably going a little hard in third when it happened..but it's a tough motor, it'll take it till it can't..
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