Vtwin head service which one - Road Glide Forums
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post #1 of 4 (permalink) Old 08-14-2019, 07:49 AM Thread Starter
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Vtwin head service which one

I have A 2010 roadglide with a.107 build with a 58 mm TB, pro pipe 777 cams,the heads are stock. it actually runs really nice but I would like to do the heads to get the most out of the TB which do you prefer hand porting or CNC thanks as usual ride safe
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post #2 of 4 (permalink) Old 08-14-2019, 08:49 AM
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Fuel Moto does performance work; they're in Wisconsin and a sponsor on this forum.
https://www.fuelmotousa.com/

There's a guy on here @Freedom74 that just had work done by Sheffer Performance and he was very satisfied with hand porting.
They're in Evansville IN
https://www.roadglide.org/54-dyno-re...oto-venti.html
https://www.shefferperformancehd.com/#!

i would recommend speaking with a builder to assure a matched set of parts.

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Last edited by Little Wing; 08-14-2019 at 08:52 AM.
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post #3 of 4 (permalink) Old 08-14-2019, 09:56 AM
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If you need to take the heads off anyway because they may need a valve job to freshen things up due to high mileage I guess it would not be a bad idea to port them while they're off. If you are just doing it to gain more power then there is a very good chance you will be disappointed. Like LW posted above I would speak with your builder to make sure the whole recipe makes sense and you might need to change some other components to make it worthwhile. Maybe have the cylinders shaved a bit to get them at zero decking and/or use a Cometic .030" head gasket to raise the compression. Possibly new type of performance pistons depending on what you have.
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post #4 of 4 (permalink) Old 08-14-2019, 12:04 PM
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As it is now, you're getting nothing out of that throttle body. And with those cams, you're leaving some power on the table because of the restriction on the intake side of the head. Intake valve isn't open long enough.

Porting the heads and bumping up the intake valve size should be the next thing on the stage list for a 103, after deciding to go with power cams.

How you go about it up to you. Hand porting can be as good and better than CNC work. But it can also be worse. With CNC you know what you are getting.

It comes down to time and money. How long do you want the scooter apart, and what do you have to spend. Its going to be upwards of a grand when you get done. And you'll be needing a set of high flow injectors to feed that throttle body. Plus a fresh tune. Fast turn around is two weeks plus shipping time. If you go with off the shelf heads, its a Saturday job.


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