Donate!
Welcome, Guest. Please Login or Register :: View Members
Pages: 1
Send Topic Print
Power adder....? (Read 230 times)
Blue04Savage
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 63

Power adder....?
09/15/12 at 17:35:19
 
Well I did a little looking to find HP, and Torque ratings for the savage.  Apparently from what i've found it's 31hp, and 37ft lbs.  I'm wondering..........

What kind of power gain would you get from putting on a harley muffler (not sure which yet), rejetting the carb, and possibly a better air filter if there's a recommended one?  

I'm assuming it would be somewhat noticeable no?  Any other relatively cheap mods for these bikes to pull a little more power, without sacrificing dependability?

I can't decide if I want to keep, or sell my 04' next year.  I like the bike in general, but it's a little small for me (i'm 6'), and just a bit underpowered for those longer trips.

On the flip side, I only paid $2G for it, so perhaps I could mod it a bit and make something a bit more fun out of it.

Thoughts?
Back to top
 
 
  IP Logged
Serowbot
YaBB Moderator
ModSquad
*****
Offline

OK.... so what's the
speed of dark?

Posts: 28660
Tucson Az
Gender: male
Re: Power adder....?
Reply #1 - 09/15/12 at 17:57:25
 
Although it's rated 31hp,... if you dyno'd it,.. it would probably be more like 28 or 29hp stock...
A Harley shorty and a K/N slip-in filter with rejet, will likely add 2 to 4 ponies...
... add, porting the exhaust to match the pipe (leave 90% of the torque hump in there, just smooth it)... and I'm at 34hp, and still around 37ftlbs...

Noticeable,.. but not that impressive...  the biggest gain is psychological from a much nicer exhaust tone...
Back to top
 
 

Ludicrous Speed !... ... Huh...
  IP Logged
Blue04Savage
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 63

Re: Power adder....?
Reply #2 - 09/15/12 at 18:26:38
 
Gotcha.  Makes perfect sense.  Thanks for the info Serowbot.  I guess on a % basis that's a decent gain, but it's just making something slow a little less slow. lol

After doing the exhaust, and rejet, did you still get much backfiring?

What would a shop typically charge to rejet a carb on these bikes?  Any idea?  I wouldn't know how to properly do it.

Thanks again
Back to top
 
 
  IP Logged
Serowbot
YaBB Moderator
ModSquad
*****
Offline

OK.... so what's the
speed of dark?

Posts: 28660
Tucson Az
Gender: male
Re: Power adder....?
Reply #3 - 09/15/12 at 19:45:20
 
I get pops, and blats, on decel,.. but no backfires...  occasional poof, on shutdown...

I'm guessing a shop would charge $50 to $100 to dyno and rejet...
... but,... it's not that hard to change jets... and you can get a good idea of what you need to do from a few simple tests...
...if you like to learn,.. it can be fun...
Here's a sorta' guide to what I generally do... Wink...
Serowbot's carb tuning tips for beginners...
Back to top
 
 

Ludicrous Speed !... ... Huh...
  IP Logged
justin_o_guy2
Serious Thumper
*****
Offline

What happened?

Posts: 55279
East Texas, 1/2 dallas/la.
Re: Power adder....?
Reply #4 - 09/15/12 at 21:27:12
 
Blue04Savage wrote on 09/15/12 at 18:26:38:
Gotcha.  Makes perfect sense.  Thanks for the info Serowbot.  I guess on a % basis that's a decent gain, but it's just making something slow a little less slow. lol

After doing the exhaust, and rejet, did you still get much backfiring?

What would a shop typically charge to rejet a carb on these bikes?  Any idea?  I wouldn't know how to properly do it.



Sometimes jetting needs played with,, if you wanna tune it, learn to tune it, YOure gonna hafta learn to maintain it, or youre gonna watch your bike sit in the shop while you should be riding & youre gonna be paying out way too much $$$.
Thanks again

Back to top
 
 

The people never give up their liberties but under some delusion.- Edmund Burke.
  IP Logged
Blue04Savage
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 63

Re: Power adder....?
Reply #5 - 09/15/12 at 21:57:52
 
Alright cool.  I'll read through the link you posted serowbot.  

I've never worked on bikes, other than just doing oil changes, so this will be new to me.  I just don't want to screw something up, and not realize it.

Thanks again.
Back to top
 
 
  IP Logged
justin_o_guy2
Serious Thumper
*****
Offline

What happened?

Posts: 55279
East Texas, 1/2 dallas/la.
Re: Power adder....?
Reply #6 - 09/16/12 at 01:03:01
 
Yea, well,, I understand that, we all do, but Id just hafta stay in bed if I wasnt willing to take a chance on screwin something up. & you just might screw something up, too, but most things will unscrew. Havent seen anyone ruin their bike by trying to jet it. We have seen a couple engines ruined by "mechanics" at the shop putting oil filters in backwards.
A small set of tools will save you enough $$$ to p[ay for them many times over,
Back to top
 
 

The people never give up their liberties but under some delusion.- Edmund Burke.
  IP Logged
LANCER
Serious Thumper
Alliance Member
*****
Offline

Savage Beast
Performance Parts

Posts: 10665
Oklahoma
Gender: male
Re: Power adder....?
Reply #7 - 09/16/12 at 03:11:40
 
This engine responds very well to mod's that improve air flow (muffler) and correcting the air/fuel mixture which is very lean as set by the factory.  This lean mixture, especially in the pilot fuel circuit, is largely responsible for the backfiring issue that plagues every LS650 rolling off the assembly line.  The factory PR line on this issue is that "it's just the nature of a large single".  Really ? ?  Does the DR650 or KLR650 or the Honda 650 or any of the 650's from Europe backfire ?  They are large singles too but for some reason don't seem to have this problem.  Hmmmm.  
Backfiring is simply the result of an incorrectly jetted/tuned carb.
With a HD dyna muffler in place of the stock muffler, changing the pilot jet to a #52.5 and a 152.5 main jet & then adjusting the pilot screw to richen the mixture will take care of the backfiring, improve power and make a noticeable difference in the riding experience.
The white spacer mod on the jet needle will also improve performance but is a bit more difficult for a "first timer" doing carb work.  It can be done later if you are not comfortable with it yet.

Carb function:

There is overlap but in general the following applies.

Pilot jet:  controls idle to 1/4 throttle
Jet needle:  controls 1/4 to 3/4 throttle
Main jet:  controls 3/4 to wide open throttle

The tech section has lots of helpful info on doing these mod's.

Back to top
 
 
  IP Logged
Blue04Savage
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 63

Re: Power adder....?
Reply #8 - 09/17/12 at 11:51:17
 
Excellent.  You all make very good points.  I guess i'll just do it myself if I decide to keep the bike and do so.  I'm not a "mechanical retard", but like I said i'm just hesitant to work on bikes since I haven't before.  

I heard somewhere (probably on here), that it's not uncommon to be able to go to a harley dealership, and say "hey, i'm looking for this muffler.....", and have them sell you a used one for real cheap.  Is this correct?  I understand that it would vary on the dealership.

The last thing I was wondering is if the harley mufflers that have been recommended, by people on here for our bikes, are a quick slip on deal?  Or is there need for mounting bracket modifications, and/or PITA adapter pieces?

Thanks again!
Back to top
 
 
  IP Logged
SALB
Serious Thumper
*****
Offline

FSO

Posts: 668
Whittier, AK
Gender: male
Re: Power adder....?
Reply #9 - 09/17/12 at 11:57:29
 
Sound like you need to get acquainted with the tech section! Cool

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1181745927
Back to top
 
 
  IP Logged
Bock
YaBB Newbies
*
Offline

SuzukiSavage.com
Rocks!

Posts: 27

Re: Power adder....?
Reply #10 - 09/17/12 at 12:16:44
 
LANCER wrote on 09/16/12 at 03:11:40:
This engine responds very well to mod's that improve air flow (muffler) and correcting the air/fuel mixture which is very lean as set by the factory.  This lean mixture, especially in the pilot fuel circuit, is largely responsible for the backfiring issue that plagues every LS650 rolling off the assembly line.  The factory PR line on this issue is that "it's just the nature of a large single".  Really ? ?  Does the DR650 or KLR650 or the Honda 650 or any of the 650's from Europe backfire ?  They are large singles too but for some reason don't seem to have this problem.  Hmmmm.  
Backfiring is simply the result of an incorrectly jetted/tuned carb.
With a HD dyna muffler in place of the stock muffler, changing the pilot jet to a #52.5 and a 152.5 main jet & then adjusting the pilot screw to richen the mixture will take care of the backfiring, improve power and make a noticeable difference in the riding experience.
The white spacer mod on the jet needle will also improve performance but is a bit more difficult for a "first timer" doing carb work.  It can be done later if you are not comfortable with it yet.

Carb function:

There is overlap but in general the following applies.

Pilot jet:  controls idle to 1/4 throttle
Jet needle:  controls 1/4 to 3/4 throttle
Main jet:  controls 3/4 to wide open throttle

The tech section has lots of helpful info on doing these mod's.




LANCER, I have a HORRIBLE backfire problem on my 2006 S40.  I just bought it this summer (first bike). When I roll off quickly, I get a bang.  I was told it's probably running too rich.  I think that is true, because I'm getting around 30mpg on it.  Not sure what I need to do to fix this problem. But shouldn't I be getting a lot better gas mileage than 30mpg?

Thanks!
Back to top
 
 
  IP Logged
LANCER
Serious Thumper
Alliance Member
*****
Offline

Savage Beast
Performance Parts

Posts: 10665
Oklahoma
Gender: male
Re: Power adder....?
Reply #11 - 09/17/12 at 15:46:22
 
Quote:
LANCER, I have a HORRIBLE backfire problem on my 2006 S40.  I just bought it this summer (first bike). When I roll off quickly, I get a bang.  I was told it's probably running too rich.  I think that is true, because I'm getting around 30mpg on it.  Not sure what I need to do to fix this problem. But shouldn't I be getting a lot better gas mileage than 30mpg?

Thanks!


YESSSSSSSSSSSSSSSSSSSS

A stock engine should get at least 50 mpg.
Pull the carb and take off the float bowl and check the pilot and main jets...what size are they ?
You should also pull out the slide and remove the jet needle to see if the white spacer is still there or has been modified.
There is definitely something up with it and you need to know what's in the carb.  That is square 1.
Back to top
 
 
  IP Logged
Bock
YaBB Newbies
*
Offline

SuzukiSavage.com
Rocks!

Posts: 27

Re: Power adder....?
Reply #12 - 09/17/12 at 21:40:02
 
[quote author=68656A6761763633040 link=1347755719/0#11 date=1347921982] Quote:
YESSSSSSSSSSSSSSSSSSSS

A stock engine should get at least 50 mpg.
Pull the carb and take off the float bowl and check the pilot and main jets...what size are they ?
You should also pull out the slide and remove the jet needle to see if the white spacer is still there or has been modified.
There is definitely something up with it and you need to know what's in the carb.  That is square 1.


I'll have to do a little research on how to do this/understand what you are saying.  I have never done any type of mechanical work.  I'm hoping to start learning.
Back to top
 
 
  IP Logged
LANCER
Serious Thumper
Alliance Member
*****
Offline

Savage Beast
Performance Parts

Posts: 10665
Oklahoma
Gender: male
Re: Power adder....?
Reply #13 - 09/18/12 at 13:36:08
 
[quote author=193438305B0 link=1347755719/0#12 date=1347943202]LANCER wrote on 09/17/12 at 15:46:22:
Quote:
YESSSSSSSSSSSSSSSSSSSS

A stock engine should get at least 50 mpg.
Pull the carb and take off the float bowl and check the pilot and main jets...what size are they ?
You should also pull out the slide and remove the jet needle to see if the white spacer is still there or has been modified.
There is definitely something up with it and you need to know what's in the carb.  That is square 1.


I'll have to do a little research on how to do this/understand what you are saying.  I have never done any type of mechanical work.  I'm hoping to start learning.


Do you have the Haynes manual for the bike ?  If not get one.  If you do then find the pages with the "exploded carb parts" and use that as reference as you read through the jetting/tuning info in the tech section of this forum.  That is a good place to start your Savage/S40 education.  There is quite a bit of stuff there.  If you need further help let me know.
Back to top
 
 
  IP Logged
Bock
YaBB Newbies
*
Offline

SuzukiSavage.com
Rocks!

Posts: 27

Re: Power adder....?
Reply #14 - 09/18/12 at 14:23:56
 
Thank you!
Back to top
 
 
  IP Logged
Pages: 1
Send Topic Print


« Home

 
« Home
SuzukiSavage.com
09/28/24 at 08:36:47



General CategoryRubber Side Down! › Power adder....?


SuzukiSavage.com » Powered by YaBB 2.2!
YaBB © 2000-2007. All Rights Reserved.