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exhaust port (Read 2379 times)
BurnPgh
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exhaust port
06/02/10 at 22:27:16
 
Has anyone opened the exhaust port and kept the stock header? Any considerable difference? I know I should get a better header but im broke at this point. No more fun money to play around with, I dont know anyone that welds and is reliable, and Im tired of in depth tinkering. I can spend a little time clearing that lip out of the way but would it be worth it? If not I'll just wait until i do get the header situation figured out.
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LANCER
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Re: exhaust port
Reply #1 - 06/03/10 at 03:20:44
 
I think opening the outside of the exhuast port is worth the little time it takes to do it, even if you are still using the stock header.
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earlytimz
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Re: exhaust port
Reply #2 - 06/03/10 at 06:03:10
 
I can't give an accurate before & after, but I agree with Lancer. It's an easy job & I don't see any way it'll hurt your performance.
I opened the port up to match the size of the header ID & I also took off that crazy "ledge" inside.

FWIW... I didn't ride the bike much before I tore it down so like I said, it's hard for me to give a good comparison. I can tell you though, it will absolutely scream when you open her up now so I don't think it hurt anything! I've been porting heads on various machines for years & this is one of the easiest to do. There's lots of material in there, so you don't have to worry about taking out too much...

Some of the best performing port jobs I've seen were also the ugliest!!
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justin_o_guy2
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Re: exhaust port
Reply #3 - 06/03/10 at 07:31:04
 
Some of the best performing port jobs I've seen were also the ugliest!!



Ive seen that hold true in other areas of life.
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earlytimz
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Re: exhaust port
Reply #4 - 06/03/10 at 07:46:53
 
LOL!!
You ain't a joking bro!!!
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earlytimz
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Re: exhaust port
Reply #5 - 06/03/10 at 10:24:11
 
Don't forget to get rid of that stud on the intake side. Otherwise it's in pretty good shape. I cleaned up the casting seams a little too, but you don't want this side too smooth. That affects atomization & fuel drop out...
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klx650sm2002
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Re: exhaust port
Reply #6 - 06/03/10 at 11:17:38
 
To me the exhaust port is the worst thing about the savage, anything you can do with it would be good.
Clive W Smiley
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JohnBoy
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Re: exhaust port
Reply #7 - 06/03/10 at 11:37:33
 
If you choose to do it, would you take pictures for us of before and after?
Please...please...please! Smiley
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BurnPgh
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Re: exhaust port
Reply #8 - 06/03/10 at 11:39:27
 
If you want before and after pics search "lancer upgrade" with the search function for "all posts". If you want to see a serious port job before/after search "clutch slippage on tuned savage"
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Chief Gunner
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Re: exhaust port
Reply #9 - 06/03/10 at 12:40:58
 
BurnPgh I checked the two posts you recommended.
Other than the pics on lancer's showing the lip at exit being opened up, is there any additional 'meat' that could be taken out that would improve the flow? I'm running stock pipe with and HD muffler. I'll be doing some extensive engine clean up and if a mod like this will improve the performance I have the tools and the time.
Would like to see some before and after pics so I don't go too far and punch through anywhere. I tend to get carried away with power tools!  Grin
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BurnPgh
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Re: exhaust port
Reply #10 - 06/04/10 at 00:33:29
 
whoops. the second thread i recommended wasnt the one i thought. Its one of Kwaknut's more recent posts but IDK exaclty where its at. I'll see if i can find it.
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Re: exhaust port
Reply #11 - 06/04/10 at 08:05:15
 
found a thread entitled exhaust port back in 07, it had a lot of pictures attached but the links have expired.

Lancer / Savage Greg / klx650sm2002, this discussion was between you guys. You don't happen to have those pictures saved anywhere do you? Any lessons learned?

Anything would be appreciated. As always thanks!
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LANCER
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Re: exhaust port
Reply #12 - 06/04/10 at 09:29:42
 
VALVE AREA ... BEFORE






EXHAUST PORTS ... BEFORE








EXHAUST PORTS ... AFTER







VALVE AREA ... AFTER








INTAKE ... AFTER




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« Last Edit: 06/05/10 at 03:27:11 by LANCER »  

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klx650sm2002
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Re: exhaust port
Reply #13 - 06/04/10 at 10:07:09
 
Lancer, are the valve springs above that horizontal bit in the top of the port, how much is it safe to take off there ?
Clive W Smiley
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ralfyguy
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Re: exhaust port
Reply #14 - 06/04/10 at 10:26:45
 
LANCER wrote on 06/04/10 at 09:29:42:

Ok dumb question: Is this before or after?
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