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[Twolanerider]

I owe apologies to someone.  Trouble is I forget who.  The subject of bridges and compression releases came up two or three months ago.  Someone saw the thread two or three weeks ago and ask for imagery.  I promised it for the near future but have forgotten who requested it. 

To whomever I owe the pics; here you go.  Sorry for forgetting who wanted these.

Standard bridge laying in a head with rough layout marks to show where to start working with a holesaw:

[Twolanerider]

Heads with releases installed to give an idea of what you're working around:

[Twolanerider]

If you're doing anything extra, like chrome plastic caps on top of the releases, be sure and allow room for that:

[Twolanerider]

And with a very little time and effort, a holesaw to make the initial cut, and a small rotary grinder and buffing wheel to finish the edges can leave perfectly functional cylinder head bridges for use with compression releases.

[sadunbar]

And with a very little time and effort, a holesaw to make the initial cut, and a small rotary grinder and buffing wheel to finish the edges can leave perfectly functional cylinder head bridges for use with compression releases.

I did something very similiar (less the awesome powdercoating and diamond cutting) to allow access to my compression releases.  I have not taken pictures, but I will.  I didn't use a holesaw - I just milled clearance on a Bridgeport.  But, I like the end result!  Yours look great!   

[SBB]

Clearly I am wayyyyyyyyyyyyyyy behind on this build.
When did the compression releases show up?

 

[Twolanerider]

I did something very similiar (less the awesome powdercoating and diamond cutting) to allow access to my compression releases.  I have not taken pictures, but I will.  I didn't use a holesaw - I just milled clearance on a Bridgeport.  But, I like the end result!  Yours look great!   

Scott, a buddy here has a full machine shop.  He'll let me in evenings or weekends.  So the problem was almost deciding which way to clear the material.  It was easier to spend 45 minutes in my own garage with a holesaw and a dremel than anything else though.  Some time the easy solution really is the best.

[Fired00d]

Clearly I am wayyyyyyyyyyyyyyy behind on this build.
When did the compression releases show up?

 

Not to speak for Scott, but I guess this is similar to something someone we know is doing (holding back) on the mods they making to their SERG.

* Fired00d is still waiting for those said "upgrades" to that "slightly modified" SERG.

 
Ride Safe,
Fired00d
 

[SBB]

Not to speak for Scott, but I guess this is similar to something someone we know is doing (holding back) on the mods they making to their SERG.

* Fired00d is still waiting for those said "upgrades" to that "slightly modified" SERG.

[/s]
Ride Safe,
Fired00d
 

WAIT!

I hear some noise in the background.

Can my computer have static?

NAW!

It's winter time, it's just the wind blowing!

SBB

[Twolanerider]

Clearly I am wayyyyyyyyyyyyyyy behind on this build.
When did the compression releases show up?

 

Chip, during the zipped up effort it was my choice.  And as we've discussed I decided against them.  Since those heads could not be reused the new head choice took the compression releases choice away from me.  The button fly resurrection is using the HTCC heads and they are machined for releases from new.  So... there we go.

Static CR is going to be in the 10.25:1 range.  So it would've been an iffy call one way or the other.  As is they'll likely get used on hot days for hot restarts.  Rest of the time, not so much.

[Fired00d]

WAIT!

I hear some noise in the background.

Can my computer have static?

NAW!

It's winter time, it's just the wind blowing!

SBB

Butthead!!!

 
Ride Safe,
Fired00d
 

[SBB]

Chip, during the zipped up effort it was my choice.  And as we've discussed I decided against them.  Since those heads could not be reused the new head choice took the compression releases choice away from me.  The HTCC heads are machined for them new.  So... there we go.

Static CR is going to be in the 10.25:1 range.  So it would've been an iffy call one way or the other.  As is they'll likely get used on hot days for hot restarts.  Rest of the time, not so much.

Thanks Don!

Now I'm going to tell you what was told to me.

Not really hearsay but something I consider a fact based on who told me.

Brad from Freedom Cycle said that in the higher elevations it wasn't necessary to use the C/R's.

But at sea level and the 500' elevation where I lived it would be necessary.

The SEEG cranked fine in Reno without them.

Home and the beach it labored with out them.

He said, the higher the elevation the thinner the air!

Always thought that was an interesting reason!

 

[Twolanerider]

Thanks Don!

Now I'm going to tell you what was told to me.

Not really hearsay but something I consider a fact based on who told me.

Brad from Freedom Cycle said that in the higher elevations it wasn't necessary to use the C/R's.

But at sea level and the 500' elevation where I lived it would be necessary.

The SEEG cranked fine in Reno without them.

Home and the beach it labored with out them.

He said, the higher the elevation the thinner the air!

Always thought that was an interesting reason!

 

Atmospheric pressure is going to push in only so much volume.  If that volume happens to be denser that is a difference.  The zipped up version did ok without releases.  On rare occasion if the engine had gotten very very hot I'd have to be sure and start it in neutral.  The Buttonfly Resurrection is going to have a similar CR.  So having them, just in case, doesn't bother me at all.  Especially since they're mostly hidden.

[rednectum]

twolane, great work and love that red powder.

just a recommendation, but i would devise a tool (maybe a bent wire) that i could use to pull up on the release if it ever stuck in the open position (as they WILL do). and carry that tool in your bag.

great mod!! you got your hole drilled yet henry??/

[Twolanerider]

twolane, great work and love that red powder.

just a recommendation, but i would devise a tool (maybe a bent wire) that i could use to pull up on the release if it ever stuck in the open position (as they WILL do). and carry that tool in your bag.

great mod!! you got your hole drilled yet henry??/

Oh lordy, been there and done that on motors past.  Already found the little bent fork tool thingy that'd been thrown in the junk drawer of the tool box and moved it over to the bike .


It's too bad there's not a better more completely reliable manual release.  For what they do they're effective enough.  But they've really not changed a bit in years and years and years.  And they came to motorcycles from other applications where immeidate reliability every time wasn't a great concern anyway. 

[REGGAB]

twolane, great work and love that red powder.

just a recommendation, but i would devise a tool (maybe a bent wire) that i could use to pull up on the release if it ever stuck in the open position (as they WILL do). and carry that tool in your bag.

great mod!! you got your hole drilled yet henry??/

Nope.  Sold 'em.  Decided I like the look of the C/Rs.  Besides, I'd burn my fingers tryin' to mash 'em since they're so far down in the bridge holes.

[porthole]

And they came to motorcycles from other applications where immediate reliability every time wasn't a great concern anyway. 

We have them in all of our chainsaws and power saws, have to use them to start.
The units get started everyday, 365 days a year and we haven't had a failure yet.

Wonder why they can't make them as reliable for bikes.

[porthole]

Not really hearsay but something I consider a fact based on who told me.

 

[HWYMAN1]

I owe apologies to someone.  Trouble is I forget who.  The subject of bridges and compression releases came up two or three months ago.  Someone saw the thread two or three weeks ago and ask for imagery.  I promised it for the near future but have forgotten who requested it. 

To whomever I owe the pics; here you go.  Sorry for forgetting who wanted these.

Standard bridge laying in a head with rough layout marks to show where to start working with a holesaw:

Don,
this is great piece of work, had to take of my bridge covers for CR placement after cyclerama head work. Did you center the bit on the second wing or the top plate? also did you have to bevel or perpendicular to surface? thanks john

[Twolanerider]

Don,
this is great piece of work, had to take of my bridge covers for CR placement after cyclerama head work. Did you center the bit on the second wing or the top plate? also did you have to bevel or perpendicular to surface? thanks john

John,
The pilot hole was in the beveled (angled) part.  I simply extended the pilot bit a lot from the hole saw.  Drilled in to the angle straight on to it then backed out a bit.  Rounded out the pilot hole just a bit then brought the hole saw down perpendicular to the flat surface on top.  It was taking it out in steps but a sharp saw and only moderate RPMs made it really a very simple little chore.  Dressed the edges when done with a Dremel and you'd never know they weren't made this way to begin with.

[REGGAB]

John,
The pilot hole was in the beveled (angled) part.  I simply extended the pilot bit a lot from the hole saw.  Drilled in to the angle straight on to it then backed out a bit.  Rounded out the pilot hole just a bit then brought the hole saw down perpendicular to the flat surface on top.  It was taking it out in steps but a sharp saw and only moderate RPMs made it really a very simple little chore.  Dressed the edges when done with a Dremel and you'd never know they weren't made this way to begin with.

WOW.  You're good.   

[Twolanerider]

WOW.  You're good.   

Henry, went out earlier this evening and did my very best trying to convince a particular lass to let me prove that very point (or at least make a valiant effort of it!).  Alas, she spurned me.  So I came home and worked on the bike for a couple hours or so.  She loves me .

[HWYMAN1]

thanks Don,
I guess I will boldly go where only 2lane has gone before ( even if I screw them up , they were just sitting in a box anyway!) john

[Twolanerider]

thanks Don,
I guess I will boldly go where only 2lane has gone before ( even if I screw them up , they were just sitting in a box anyway!) john

And they're (relatively) cheap by Harley standards.  It'll be an adventure .


Since this first came up one of our brethren mailed me his to mess with.  I can understand that buying a set of decent hole saws is more expense than the project is probably worth. 

I drilled out that 2nd set and the material worked as it did the first time.  Was a little concerned that a fin might break off or something if the saw hung up.  But nothing happened either time.  So it might just be a fairly repeatable process.

[REGGAB]

Henry, went out earlier this evening and did my very best trying to convince a particular lass to let me prove that very point (or at least make a valiant effort of it!).  Alas, she spurned me.  So I came home and worked on the bike for a couple hours or so.  She loves me .

Well Don, we can't be good at "everything."   
The sled will always be there for the rider.  Problem is, she don't care who's riding, and will happily take a poundin' from anyone.  Wonder does that make her a Sierra Lima Uniform Tango?

[Twolanerider]

Well Don, we can't be good at "everything."   
The sled will always be there for the rider.  Problem is, she don't care who's riding, and will happily take a poundin' from anyone.  Wonder does that make her a Sierra Lima Uniform Tango?

Henry, it just might.  But we'll never judge.  Certainly don't want to piss them off either.  A cranky bike is a bad thing .

[rednectum]

Henry, it just might.  But we'll never judge.  Certainly don't want to piss them off either.  A cranky bike is a bad thing .

yep, she may just pull to the side of the road with arms crossed. every time you push her button she will respond with a b^tchin sound. talk sweet, rub all the right places and when she is damn good and ready---------------she may start to purr again.

[Twolanerider]

yep, she may just pull to the side of the road with arms crossed. every time you push her button she will respond with a b^tchin sound. talk sweet, rub all the right places and when she is damn good and ready---------------she may start to purr again.

Too true.  A bike with an attitude and a mind of it's own might lift your spirits only to break your heart again around the next turn.  She's a mean animal best to be avoided.  Keep her happy.