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Discussion Starter #1 (Edited)
Ok, so I watch a video and read up on do a compensator swap, no proiblems.

Did lifters and SE Adjustable Pushrods on two different bikes.

Always do my own wheel and tire, brake, air cleaner and exhaust removal/replacement. Do my own wheel bearings.

Did my own cams on my 2013 RGU.

I have never taken the tank off any of my three harleys, but did it all the time on my metrics. Can tune a 6 carb bike (sync the carbs anyway).

I can usually watch a video several times, read all the boards, use the Service Manual and vendor instructions, and so far have good results.

I'd like to buy a kit from Hillside or GMR or FM. Somewhere between $550 and $750 for parts. $0 labor, and self tune with TTS Mastertune Flight Recorder.

Should I give the 107 upgrade a whack? I've never done any piston or head removal work on anything. Did not take shop class in high school, took electronics, lol.

Greg
 

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I would say you could handle a top end.
What is your goal?
IMO if your not doing headwork, there is no reason to take a 103 to 107 .
Your just going to pick up 3-4 hp tq over your 103 .
Now if your wanting to do some head work , bump the compression a little , and step up the game a little ? A 107 is a good platform.
 

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Discussion Starter #3
With my 57H cams, I'd probably be happy with a little more compression and keep the 103. But if Im in that far, why not the jugs too?

Decisions decisions decisions.

That good info, not much improvement. Not a high rpm rider, so headswork is not really gonna help me.

But a head gasket say .030 to increase compression just a teeny bit? That is an option.
 

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With my 57H cams, I'd probably be happy with a little more compression and keep the 103. But if Im in that far, why not the jugs too?

Decisions decisions decisions.

That good info, not much improvement. Not a high rpm rider, so headswork is not really gonna help me.

But a head gasket say .030 to increase compression just a teeny bit? That is an option.
Actually a good quality street type port on the heads will make a noticeable gain at low and mid rpms also.
 

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From what you've done in the past, I don't think you'll have any problems.
 

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With my 57H cams, I'd probably be happy with a little more compression and keep the 103. But if Im in that far, why not the jugs too?

Decisions decisions decisions.

That good info, not much improvement. Not a high rpm rider, so headswork is not really gonna help me.

But a head gasket say .030 to increase compression just a teeny bit? That is an option.
if you use a .030 head gasket and just surface your heads .020 ,you will have the same compressoin as a 107 flat top piston set up. 10.3:1

what exhaust do you have ?
what does it do for power now?
if your not somewhere between 95-100 hp and 105-115 tq now,then you either need a tune or diff exhaust.
thats a real sweet combo,even with stock heads.
 

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Discussion Starter #7
if you use a .030 head gasket and just surface your heads .020 ,you will have the same compressoin as a 107 flat top piston set up. 10.3:1

what exhaust do you have ?
what does it do for power now?
if your not somewhere between 95-100 hp and 105-115 tq now,then you either need a tune or diff exhaust.
thats a real sweet combo,even with stock heads.
I have not had it dynoed, have been tuning using the self tune features of the TTS. I went from stock with slip ons, to stage two, so the seat of the pants dyno tells me it really woke up.

I have seen similar dyno sheets at 95hp and 110tq for my setup, but the had .030 head gasket.

Big Sucker
Cobra Power Port Duals
57H cams
V&H twin slash slip ons.

It's just something I have never thought I could do. Now thinking sending the heads to Big Boyz for their street porting job and a .030 gasket. Have them take .020 off the head surface?
 

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I have not had it dynoed, have been tuning using the self tune features of the TTS. I went from stock with slip ons, to stage two, so the seat of the pants dyno tells me it really woke up.

I have seen similar dyno sheets at 95hp and 110tq for my setup, but the had .030 head gasket.

Big Sucker
Cobra Power Port Duals
57H cams
V&H twin slash slip ons.

It's just something I have never thought I could do. Now thinking sending the heads to Big Boyz for their street porting job and a .030 gasket. Have them take .020 off the head surface?
maybe you better leave it at the .030 gasket and street port.
thats a little to much compression for a v tuned bike.
with the exhaust you have it really won't benefit from the extra compression of surfacing the heads anyway.
 

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Here's what I'm doing. Going to leave the bike at 103. I am having the heads done, going with a set of Dragos 565 cams, new lifters and adjustable push rods. I can't see a huge difference in performance going from a 103 to a 107, just not enough cubes gained. If you are wanting to raise compression or go to forged pistons then I could see doing the jugs and pistons. Just my thoughts on the subject, I would imagine whichever way you go you will be happy.
 

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I also will leave mine a 103,will bump the comp up some with forged pistons,get the heads done,new lifters and push rods.
 

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Ok, so I watch a video and read up on do a compensator swap, no proiblems.

Did lifters and SE Adjustable Pushrods on two different bikes.

Always do my own wheel and tire, brake, air cleaner and exhaust removal/replacement. Do my own wheel bearings.

Did my own cams on my 2013 RGU.

I have never taken the tank off any of my three harleys, but did it all the time on my metrics. Can tune a 6 carb bike (sync the carbs anyway).

I can usually watch a video several times, read all the boards, use the Service Manual and vendor instructions, and so far have good results.

I'd like to buy a kit from Hillside or GMR or FM. Somewhere between $550 and $750 for parts. $0 labor, and self tune with TTS Mastertune Flight Recorder.

Should I give the 107 upgrade a whack? I've never done any piston or head removal work on anything. Did not take shop class in high school, took electronics, lol.

Greg
The hardest part of the whole job is adjusting the pushrods, and you already have a handle on that. Pulling the jugs and heads is not a huge challenge. The wrist pin retainers can be a little hard, but there's a tool for them.

Thing is, I'm not sure that a 107 is going to give you $500-700 worth of improvement. Sure if it was time to rebore the oem stuff, but with what you have being good to go, its a lot of bucks and work for just a few more horses.
 
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