I was reading the installation instuction for the new S&S 4.250 cylinders and they supply a plug to block off an oil passage in the head on oil cooled models. I attached a link to the pdf instuctions. Any idea what oil flow is getting blocked off?
https://assetcloud.roccommerce.net/files/_sscycle/3/9/1/510-0481-4-_25-bore-for-m8.pdf
It's a cross drilled passage- HD didn't plug it because the head gasket seals it on 107/114/117 cylinders.
With the numbers the M8 124" is putting down, how are the cranks holding up?
look at fuel moto's latest test build 160 hp and 145 tq on a stock crank. previous to this buid they had the motor at 136hp and 143 tq and i was told they beat on that bike to see if they could break it. still running
Quote from: Goopdienes on October 09, 2018, 10:38:30 AM
look at fuel moto's latest test build 160 hp and 145 tq on a stock crank. previous to this buid they had the motor at 136hp and 143 tq and i was told they beat on that bike to see if they could break it. still running
Nice-
160 out of an M8 124". Blows S&S 124" kit away with those numbers. Looks like the M8 crank is up to the task-
Any link to that sheet?
Who's Dyno?
Is 160 available as a kit, bolt on for sale (customers can repeat these #'s), or is this a "test mule", which is apples and oranges....
Didn't see it on their site...
https://www.fuelmotousa.com/p-33981-m8-cvo-124-big-bore-kit.html
This run looks pretty good!
been following this thread since they started experimenting that was the latest results.
https://www.hdforums.com/forum/milwaukee-eight-m8/1156763-milwaukee-8-big-bore-kit-install-step-by-step-by-fuel-moto-14.html#post17708961
this one too.
https://www.hdforums.com/forum/milwaukee-eight-m8/1156763-milwaukee-8-big-bore-kit-install-step-by-step-by-fuel-moto-14.html#post17821758
Quote from: Goopdienes on October 09, 2018, 10:38:30 AM
look at fuel moto's latest test build 160 hp and 145 tq on a stock crank. previous to this buid they had the motor at 136hp and 143 tq and i was told they beat on that bike to see if they could break it. still running
would like to see this with 20-30K on it.if going 124",its a no brainer to get the lower end addressed
Do these cylinders have cast liners ?
Quote from: rigidthumper on October 03, 2018, 05:31:49 AM
It's a cross drilled passage- HD didn't plug it because the head gasket seals it on 107/114/117 cylinders.
Here is a 4.250 gasket on the head along with OEM gasket to show how they sealed the head and 124 cylinder sitting on a stock head , so why the need to seal it off at all as you can see the cometic gasket covers that entire area , Not really sure why they are doing this , unless they are worried it may leak later ?? or maybe less than flat surface etc
(https://farm8.staticflickr.com/7909/46026958774_bdefe2e03d_b.jpg) (https://flic.kr/p/2d8fchJ)Untitled (https://flic.kr/p/2d8fchJ) by GMR Performance (https://www.flickr.com/photos/146449314@N07/), on Flickr
(https://farm8.staticflickr.com/7863/46751962011_ea9b002e1b_b.jpg) (https://flic.kr/p/2eej2ux)Untitled (https://flic.kr/p/2eej2ux) by GMR Performance (https://www.flickr.com/photos/146449314@N07/), on Flickr
(https://farm5.staticflickr.com/4890/46751967621_80672aa52d_b.jpg) (https://flic.kr/p/2eej4ag)
Untitled (https://flic.kr/p/2eej4ag) by GMR Performance (https://www.flickr.com/photos/146449314@N07/), on Flickr
(https://farm8.staticflickr.com/7842/46751967431_cbe06e9f5e_b.jpg) (https://flic.kr/p/2eej46Z)Untitled (https://flic.kr/p/2eej46Z) by GMR Performance (https://www.flickr.com/photos/146449314@N07/), on Flickr
I was told by Fuel Moto that Cometic had recently modified their head gasket where the plug in the head was no longer needed