Port and polish 2005 1000S - MVAgusta.net
 
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post #1 of 10 (permalink) Old 02-20-2016, 03:22 PM Thread Starter
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Port and polish 2005 1000S

I'm pulling her apart for valve adjustment anyways. I've done it before on my car. Is it worth it? I figure 15 hours to complete it.

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post #2 of 10 (permalink) Old 02-20-2016, 03:51 PM
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If you can do it, I say why not?
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post #3 of 10 (permalink) Old 02-20-2016, 04:23 PM
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If you can improve on the factory's handiwork work, yes why not. Do you have access to a flow bench?
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post #4 of 10 (permalink) Old 02-20-2016, 04:51 PM
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If you know what you are doing yes!

What a beast of a motorcycle!
It growls and rages and flies across the tarmac like a wild animal that has escaped the confinement of a cage and after merely waiting restlessly until the release, will not endure being locked up ever again.


Skye I miss you. L'essentiel est invisible pour les yeux.
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post #5 of 10 (permalink) Old 02-20-2016, 04:52 PM Thread Starter
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Originally Posted by Tony F View Post
If you can improve on the factory's handiwork work, yes why not. Do you have access to a flow bench?
I do not. It would just be taking down the sharp casted edges and putting a mirror finish on the exhaust ports.
I have no idea what the factory casting looks like. If it's reasonably smooth I'd leave it alone. If it looks anything like my car head did...could likely free up a few horses.

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post #6 of 10 (permalink) Old 02-20-2016, 07:08 PM
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No expert myself but have attempted a few with good results. Equalising the size of the chambers is probably as important as shape and polish. Make up plates to seal the ports with a hole in the centre (Perspex is good), then with the valve in place and seated measure the capacity of the chambers (inlet and exhaust) with diesel using a measuring burette. You'll be surprised by how much (in cc's) they differ. Open out the ports to the largest measured port cc. How far out the MV ports would be I don't know but on some I've done it has been as much as 9cc.

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post #7 of 10 (permalink) Old 02-20-2016, 07:13 PM
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Personally I wouldn't touch it without a flow bench

Cheers
Terry
2011 F4
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post #8 of 10 (permalink) Old 02-21-2016, 06:37 AM
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Personally I wouldn't touch it without a flow bench
I can't agree more. You will effect the exhaust gas flow and scavenging. Possibly ruining your low end torque.

If you do decide to port the exhaust side, please familiarize yourself with the water jacket locations, and how much material you can remove before you put a hole in one.

Porting and polishing usually nets good results higher up the power band. It's hardly worth the effort unless your racing and the motor is living in high RPM's. Other than that, it could be a waste of time.

Too many unknowns here for me, if it runs fine, I'd leave it alone.

"When the people fear their government there is tyranny,when the government fears the people there is liberty. My reading of history convinces me that most bad government results from too much government"--Thomas Jefferson
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post #9 of 10 (permalink) Old 02-21-2016, 06:47 AM
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Quote:
Originally Posted by Matt M. View Post
I can't agree more. You will effect the exhaust gas flow and scavenging. Possibly ruining your low end torque.

If you do decide to port the exhaust side, please familiarize yourself with the water jacket locations, and how much material you can remove before you put a hole in one.

Porting and polishing usually nets good results higher up the power band. It's hardly worth the effort unless your racing and the motor is living in high RPM's. Other than that, it could be a waste of time.

Too many unknowns here for me, if it runs fine, I'd leave it alone.
+10 yup

even a blind squirrel gets a nut once in a while!!
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post #10 of 10 (permalink) Old 02-22-2016, 04:10 PM
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I'd agree with taking any dingles off and polishing the exhaust side. Not sure I'd reshape anything though. Might be interesting to see how well the ports match the inlet and exhaust.
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