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Author Topic: DMR cylinder head (stock cylinder)  (Read 1619 times)

Offline croat1

DMR cylinder head (stock cylinder)
« on: April 28, 2022, 06:19:30 PM »
DMR cylinder head……

« Last Edit: July 07, 2022, 01:43:04 PM by croat1 »
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Offline croat1

Re: DMR cylinder head
« Reply #1 on: May 06, 2022, 08:37:48 PM »
With or without headstay

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Offline Jordanscott888

Re: DMR cylinder head
« Reply #2 on: May 08, 2022, 11:45:46 PM »
What FB group does he post in? I never see him on owners for life
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Offline croat1

Re: DMR cylinder head
« Reply #3 on: May 09, 2022, 04:02:18 AM »
Jordan, this is the page:

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Offline Jordanscott888

Re: DMR cylinder head
« Reply #4 on: May 09, 2022, 10:38:06 AM »
Thank you! Interested to see more info on that head.
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Offline croat1

Re: DMR cylinder head
« Reply #5 on: May 11, 2022, 05:40:57 PM »
Modquad branded

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Offline Jordanscott888

Re: DMR cylinder head
« Reply #6 on: May 11, 2022, 11:14:48 PM »
I’m curious what the improvements are that he was alluding to. He never specified.
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Offline atvmxr

Re: DMR cylinder head
« Reply #7 on: May 13, 2022, 10:12:36 AM »
Quote from: Jordanscott888 on May 11, 2022, 11:14:48 PM
I’m curious what the improvements are that he was alluding to. He never specified.

I think he said something about these use regular head gaskets.  guess the oring heads dont seal real well ?   Otherwise I can only imagine minimal gains with a change in the head chamber geometry
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Bunch of race quads that run on premix

Offline broken1

Re: DMR cylinder head
« Reply #8 on: May 13, 2022, 10:08:53 PM »
The benefit of using a head gasket in some of the 2 piece head designs is the coolant flow is focused toward the exhaust side like on an OEM head. I have a pro design cool head that uses a gasket.
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Offline ajbuilder250r

Re: DMR cylinder head
« Reply #9 on: May 14, 2022, 10:54:56 PM »
It uses a head gasket. I just installed this head on my bike this afternoon
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Offline The norm

Re: DMR cylinder head
« Reply #10 on: May 14, 2022, 11:25:52 PM »
I use oem heads machined by Pete that have o'rings with zero leakage nor any over heating. Do o'ring cool heads have issues? Why would the DMR head have issues? I personally like o'rings over gaskets because they can be reused unlike gaskets.
Loren
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1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

Offline hickwheeler

Re: DMR cylinder head
« Reply #11 on: May 14, 2022, 11:32:06 PM »
I have reused head gaskets in a pinch with success using copper seal
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88 hybrid 431 puma
88 (BOF Build) stock motor and oem 89 plastics
More in the works

Offline croat1

Re: DMR cylinder head
« Reply #12 on: May 22, 2022, 07:55:45 PM »
Info

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Offline ajbuilder250r

Re: DMR cylinder head
« Reply #13 on: May 27, 2022, 09:35:13 AM »
Got mine on and like it
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Offline 2ndmoto

Re: DMR cylinder head
« Reply #14 on: May 27, 2022, 01:33:23 PM »
Interesting. Are fins an option?
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