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Savage underpowered??? (Read 146 times)
klx650sm2002
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Re: Savage underpowered???
Reply #30 - 10/18/04 at 06:58:20
 
The 10:1 to 10.5:1 was from someone looking for more power.

Clive W  Cheesy
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Savage_Greg
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Re: Savage underpowered???
Reply #31 - 10/19/04 at 03:07:06
 
klx650sm2002 wrote on 12/31/69 at 16:00:10:
Skiming the head/barrel will retard the valve timing so you may want to slot the cam sprocket to advance up again.

Clive W  Cheesy


How much would 1 mm affect the timing?
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klx650sm2002
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Re: Savage underpowered???
Reply #32 - 10/19/04 at 07:30:17
 
It varies depending on sprocket size.

Clive W  Cheesy
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Savage_Greg
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Re: Savage underpowered???
Reply #33 - 10/20/04 at 02:31:56
 
Doesn't sound like an ideal thing to do.  Maybe I'll have to consider a different piston  ???
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klx650sm2002
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Re: Savage underpowered???
Reply #34 - 10/20/04 at 03:09:41
 
You just need to note the std cam position,slot the cam sprocket,and keep the cam in place while retarding the sprocket. I can work out how many degrees if you give me cam sprocket diameter.
You should wrap the chain around the sprocket and measure from rivet centers.

Clive W  Cheesy
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klx650sm2002
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Re: Savage underpowered???
Reply #35 - 10/20/04 at 03:23:55
 
If You machine 1.5mm You will get 9.52:1 from 8.5:1.

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klx650sm2002
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Re: Savage underpowered???
Reply #36 - 10/20/04 at 03:27:57
 
You need to skim the barrel enough to get your squish down to 1.5mm then take the rest off the head.

Clive W  Cheesy
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Re: Savage underpowered???
Reply #37 - 10/20/04 at 10:53:26
 
I'd rather go with a slightly larger piston and move the compression only up to 9.0:1 ...that way I can still use 87octane on it.
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Re: Savage underpowered???
Reply #38 - 10/20/04 at 22:43:45
 
I was considering having some pistons made to raise the compresion ratio to 9.5:1. This will require higher octane and w/o changing cooling capacity this is all I expect the Savage might get by w/ on pump gas.
Other Suzukis  use internal oil cooling and was wondering if the LS650 sprays the piston and so forth like the other TSCC engines do? If so, an additional oil cooler might be added to help w/ the extra heat.
I don't  know how many pistons I would have to order to get a decent price break, but would like to hear from interested parties.
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klx650sm2002
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Re: Savage underpowered???
Reply #39 - 10/21/04 at 02:28:00
 
If you are getting different pistons you could go up on cubes at the same time say to 96mm giving 680.

Clive W  Cheesy
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Savage_Greg
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Re: Savage underpowered???
Reply #40 - 10/21/04 at 02:38:44
 
klx650sm2002 wrote on 12/31/69 at 16:00:10:
You just need to note the std cam position,slot the cam sprocket,and keep the cam in place while retarding the sprocket. I can work out how many degrees if you give me cam sprocket diameter.
You should wrap the chain around the sprocket and measure from rivet centers.

Clive W  Cheesy


Are you talking about slotting for the pin on the cam sprocket?  And the bolts too?

I am having a hard time with my math skills this early.  Hmmm, need more coffee... Shocked
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klx650sm2002
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Re: Savage underpowered???
Reply #41 - 10/21/04 at 02:46:45
 
Both I think, so the sprocket can move independantly of the cam.
Does your manuel give cam timing figures in degrees if so you could use a degree disc.
If not you will need to mark the cam so you can keep it in position while you retard the sprocket.

Clive W  Cheesy
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klx650sm2002
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Re: Savage underpowered???
Reply #42 - 10/21/04 at 03:18:04
 
The above should be done with the crank at TDC on the end of comprssion start of power so you can keep the cam+crank in the same position relative to each other.

Clive W  Cheesy
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klx650sm2002
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Re: Savage underpowered???
Reply #43 - 10/21/04 at 09:12:11
 
Hey Greg
I've been looking at the photos of LS's cylinder head (that I got from You)and it apears V difficult to time the cams in the manner I had described.
On the KLX the cams are held in place after the top has been taken off, alowing you to scribe the cam ends.

Clive W  Cheesy
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Re: Savage underpowered???
Reply #44 - 10/21/04 at 13:47:18
 
klx650sm2002 wrote on 12/31/69 at 16:00:10:
If you are getting different pistons you could go up on cubes at the same time say to 96mm giving 680.

Clive W  Cheesy


That would give a CR of 8.825:1 which is good enough for me...but then would the cylinder head need machining to match the larger bore?
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