Wimmer Compression Releases
Thread Starter
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Road Master
Joined: Jan 2012
Posts: 1,090
Likes: 243
From: Maine
Damn, I didn't think that was possible but I guess the hole into the combustion space is pretty small. I like having another possible option!
Cruiser
Joined: Aug 2012
Posts: 159
Likes: 0
From: OK
Does anyone know what a dealer charges to install MCRs or ACRs? I have a sticky situation with my heads. They have already been ported by S&S and I wish I had the new ACR head or stepped up to a SE head of some sort.
Seasoned HDF Member
Joined: Mar 2009
Posts: 24,729
Likes: 9,235
From: Snow Hill, NC
What the guy at the dealer told me is they drill really slow with grease on the bit to catch the metal flakes, if anything goes in it usually is blown out when you crank the bike up.....Above my skil grade...It was done for free on my bike to try to figure out my starter grind.
Seasoned HDF Member
Joined: Apr 2006
Posts: 10,675
Likes: 95
From: Billings,Mt.
What the guy at the dealer told me is they drill really slow with grease on the bit to catch the metal flakes, if anything goes in it usually is blown out when you crank the bike up.....Above my skil grade...It was done for free on my bike to try to figure out my starter grind.
Cruiser
Joined: Apr 2011
Posts: 110
Likes: 0
From: Marin County
What the guy at the dealer told me is they drill really slow with grease on the bit to catch the metal flakes, if anything goes in it usually is blown out when you crank the bike up.....Above my skil grade...It was done for free on my bike to try to figure out my starter grind.
Seasoned HDF Member
Joined: Mar 2009
Posts: 24,729
Likes: 9,235
From: Snow Hill, NC
I have no reason to lie about it...seems pretty simple to me...drill a hole, tap a hole, install MCR...voila...
Elite HDF Member
Joined: Jul 2008
Posts: 4,741
Likes: 45
From: Indian Land, SC
Right but there are metal shavings from drilling & tapping that could find its way into the motor causing issues later on.
Thread Starter
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Road Master
Joined: Jan 2012
Posts: 1,090
Likes: 243
From: Maine
Right but there are metal shavings from drilling & tapping that could find its way into the motor causing issues later on.
Next is to drill the hole for the threads, then tap the threads.
Last step is to drill a small hole into the combustion chamber.
I guess I can see where it can be done with hardly any metal making its way into the cylinder.
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Outstanding HDF Member
Joined: Oct 2009
Posts: 2,488
Likes: 30
From: Maryland near DC
I have seen seen spark plug holes redone with the head on..first they put a greasy rag in the spark plug hole, turn the engine until the cyclinder was almost to the top, put grease on the tap which catches most of the chips, then they use a small diameter piece of hose on a shop vac in the hole to pull out the chips you can see, next pull out the rag.and then turn the engine to open the valves and then blow the cylinder out with a air chuck with a skinny piece of brake line attached to it...the machinist says he does it all the time with no issues..
Outstanding HDF Member
Joined: Jan 2010
Posts: 2,916
Likes: 31
From: earth
You could also make an air QD adapter to thread into the spark plug hole, hook up the air hose and drill away, soon as you break through the air will blow any chips out, nothing will ever drop in the cylinder, you can tap it that way too.