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Author Topic: Not to use head motor mount?  (Read 1030 times)

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Not to use head motor mount?
« on: June 20, 2013, 07:02:48 am »
Super noob here.....I just read that it is recommended not to use the motor mount that bolts to the head. Can someone explain the reasoning please?
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Re: Not to use head motor mount?
« Reply #1 on: June 20, 2013, 07:37:44 am »
Quote from: ZeroZeroMinusOne on June 20, 2013, 07:02:48 am
Super noob here.....I just read that it is recommended not to use the motor mount that bolts to the head. Can someone explain the reasoning please?

This was recommended by those engine builders that were still in the dark age and attempting to make a copper head gasket seal.  They also thought that running the head stay contributed to cracking their improperly reinforced ears on the back of the LT 500 cylinders. 
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Re: Not to use head motor mount?
« Reply #2 on: June 20, 2013, 07:49:30 am »
Thanks for the quick reply. Your info is much appraciated.  +k2
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Re: Not to use head motor mount?
« Reply #3 on: June 20, 2013, 10:19:10 am »
So Jerry if I have an o ringed head but didn't get my ears reinforced should I not use the head stay mount?
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Re: Not to use head motor mount?
« Reply #4 on: June 20, 2013, 10:40:26 am »
Jerry do you recommend running the head stay on your lt500 top ends?
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Re: Not to use head motor mount?
« Reply #5 on: June 20, 2013, 06:34:13 pm »
I dont run mine. I prob would tho on a play/duner
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Re: Not to use head motor mount?
« Reply #6 on: June 20, 2013, 07:20:18 pm »
i've always ran the upper mount, never had a blown head gasket in all the 15 years i've owned it.  but its mostly stock, just bolt on's.  my buddies 87 never blew a gasket either.   
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Re: Not to use head motor mount?
« Reply #7 on: June 20, 2013, 10:26:52 pm »
Quote from: Buckeye513 on June 20, 2013, 10:19:10 am
So Jerry if I have an o ringed head but didn't get my ears reinforced should I not use the head stay mount?

I would recommend that the ears be PROPERLY reinforced on all cylinders that have been ported.  If it has a fresh bore, you should reinforce the ears before it needs bored the next time.

I have seen a hand full of  stock cylinders with a lot of miles on them crack the ears.  I have also had many customers who would not spend the money to reinforce the ears or they had someone not properly reinforce the ears, break on the first outing after we put some power into the engine.

It might be a good idea not to use the head stay until your ears are modified.
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Re: Not to use head motor mount?
« Reply #8 on: June 21, 2013, 12:56:53 am »
To each his own, I haven't ran 1 in 14 years.
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Re: Not to use head motor mount?
« Reply #9 on: June 21, 2013, 03:33:23 am »
Thanks Jerry I plan on having the ears reinforced this off season or next. And if they crack and I melt a piston that gives me reason to do it sooner lol.
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Re: Not to use head motor mount?
« Reply #10 on: June 21, 2013, 12:05:21 pm »
I don't like running anything but the swingarm bolt on the engine.
That way I can do an engine wheelie every time I give it throttle.
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Re: Not to use head motor mount?
« Reply #11 on: June 21, 2013, 01:12:19 pm »
I completely cut off the mount on my frame so i guess even if i did want to run one i cant. im thinking about cutting the tab off my coolhead for looks.
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Re: Not to use head motor mount?
« Reply #12 on: June 21, 2013, 04:24:55 pm »
I dont run one but i also tore apart a good motor to replace the thrust washers after i rode it a half hour.. Call me... Paranoid or cautious.
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Re: Not to use head motor mount?
« Reply #13 on: June 21, 2013, 04:28:54 pm »
i cut my head mount off my frame as well. I left the plate the is welded to the frame, just cut the ears off the frame.
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