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[gpopvet]

I have been back and forth with my Local Dealer, I really like the appearance of a diamond cut motor any pros or cons I should know before I commit? Should I do anything else while motor is apart? They assured me if they do the work whatever it might be I would have no problem with factory or extended warranty.  Thanks

[Twolanerider]

I have been back and forth with my Local Dealer, I really like the appearance of a diamond cut motor any pros or cons I should know before I commit? Should I do anything else while motor is apart? They assured me if they do the work whatever it might be I would have no problem with factory or extended warranty.  Thanks

Get the warranty declaration in writing.  Personnel change and memories (intentionally or not) can fade.  The dealer is not the final arbiter of the factory warranty or the extended service agreement.  The dealer is only the agent for either Mother Harley or the contracting company.  Eventually it's up to either of them, and not the dealer, if a significant warranty claim is honored or not.

Admittedly under agency law either might be bound by the promises of their dealer agent.  But you'd hate to have to fight that out and you'd stand no chance unless you could prove the dealer originally made the statement.  Unless the dealer's GM is your mom an engine is a potentially large future failure to just trust them on.

[Talon]

Nice grader for your knuckles while wrenching near the cylinders! 

[Big Dog]

On the fence about this, the cut looks nice but you're trimming a fin that is designed for cooling and these motors run hot already, it's only what I've heard about diamond cutting. Maybe the little bit that is sacrificed may not factor into it.

[Midnight Rider]

Actually, you're increasing the surface area on the fins, so in theory, it should help with the cooling.  That's what they claim, anyhow...

Plus, it looks great, and that's really what it's about.

[cptdenny]

IMHO Do you want a show bike/garage queen or a touring bike?  Diamond cut looks nice at local bike nights and bike shows.  Out on the road it's worthless and may actually contribute to corrosion build up on the engine fins.  If you like to clean your bike often or like to do your own wrenching expect roughed up hands.  You'll have limited work space as it is with the lowers and all the other hardware that's in the way.

Still your choice, choose what works for you.

[murphy]

I've never seen corroded diamond cut cylinders, not sure where you may have

[Twolanerider]

I've never seen corroded diamond cut cylinders, not sure where you may have

Mine have been done for several years now.  No corrosion nor any other discoloration problem (that didn't come from a head gasket...). 

As for the scraped hands?  Yeah, it's possible.  But I work around my cylinders and heads all the time; including having them all off and back on again for inspection and maintenance.  My hands are fine.  Don't think I ever even drew blood (much).

[Twolanerider]

And they look so good.... 

[Midnight Rider]

Mine have been done for several years now.  No corrosion nor any other discoloration problem (that didn't come from a head gasket...). 

As for the scraped hands?  Yeah, it's possible.  But I work around my cylinders and heads all the time; including having them all off and back on again for inspection and maintenance.  My hands are fine.  Don't think I ever even drew blood (much).

I dont' know if I'd say your hands are "fine"...aren't you missing part of a digit?      Sorry...just couldn't pass that up...

[Twolanerider]

I dont' know if I'd say your hands are "fine"...aren't you missing part of a digit?    Sorry...just couldn't pass that up...

Shhhhh, remember; that's just Frank-n-finger's own version of "diamond cutting"  

[FreestateSE3]

I had the diamond cut on my 2007 SERK, with the Black engine, and have just done the process to my 2012 SESG (Granite engine).  I put 65K on the RK, and never had any corrosion.  IMHO- it does look better on the black, because of the higher degree of contrast.  But it still looks great on my new bike.  Anyway, have fun with it..

[JCZ]

I had the diamond cut on my 2007 SERK, with the Black engine, and have just done the process to my 2012 SESG (Granite engine).  I put 65K on the RK, and never had any corrosion.  IMHO- it does look better on the black, because of the higher degree of contrast.  But it still looks great on my new bike.  Anyway, have fun with it..

 

[Black Diamond]

Have mine done on my 08 SERK. I like the look with the granite motor.

JW

[Twolanerider]

Have mine done on my 08 SERK. I like the look with the granite motor.

JW

Have seen granite, black, silver and a few different powder coated colors all diamond cut.  It needs some contrast behind it to really stand out.  The only thing I've seen that really minimized the effect was diamond cutting on natural silver.  On that you have to look for it to really see the effect.  Give it some greater contrast behind the diamond cutting, however, and any color background makes the diamond cutting really pop.