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Author Topic: How much to mill off head to still run 93 Oct?  (Read 551 times)

Offline Jeremy250

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How much to mill off head to still run 93 Oct?
« on: June 10, 2017, 09:29:50 pm »
Hello to everyone, I just got a 90LT250R and want to know how much can be Milled off a head to still run 93 Octane fuel with a ported cylinder? I have a friend who has a ported cylinder and milled head he is selling to me and I nor him know how much the head is Milled, I do want a race fuel quad lol :( ANY help is appreciated.

                         (The head is milled down to where the squish band just begins)

THANK YOU FOR ALL THAT REPLY!

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Offline Jeremy250

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Re: How much to mill off head to still run 93 Oct?
« Reply #1 on: June 12, 2017, 08:10:25 pm »
Hello to all new guy here in need of help.

Offline ZillaFreak

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Re: How much to mill off head to still run 93 Oct?
« Reply #2 on: June 13, 2017, 04:49:56 am »
measure the squish, the band, the the dome size.
Just milling a head is the worse thing to do.

Offline Jeremy250

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Re: How much to mill off head to still run 93 Oct?
« Reply #3 on: June 13, 2017, 08:02:34 pm »
I do not have the tools needed to measure all that but it sounds like I would be better off going with a coo head set up if the dome would need re shaped.

Offline Q2W

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Re: How much to mill off head to still run 93 Oct?
« Reply #4 on: June 14, 2017, 08:32:00 am »
cool head domes will require the same.

Offline Jeremy250

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Re: How much to mill off head to still run 93 Oct?
« Reply #5 on: June 14, 2017, 08:06:50 pm »
Ok never mind, thanks for the info guys. I think I will play it safe and keep my stock head better safe then sorry.

Offline Jeremy250

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Re: How much to mill off head to still run 93 Oct?
« Reply #6 on: June 14, 2017, 08:13:03 pm »
So I am new to power valved engines, is it possible to adjust my power valve so that it hits in the lower RPM'S of the power band? if so how is it done?

Again THANK YOU to all that apply.

Offline Nekrofilliak

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Re: How much to mill off head to still run 93 Oct?
« Reply #7 on: July 03, 2017, 05:47:33 am »
use the power valve adjusting knob ........  +k2
88 Lt250r.
79 Lawnboy 21" ;-P

 

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