FMF Powercore and carb rejetting done!

Thread Tools
 
Search this Thread
 
  #1  
Old 08-04-2010 | 02:34 AM
Kobrakriss's Avatar
Thread Starter
|
Senior Member
1st Gear Member
Joined: Jun 2010
Posts: 131
From: Cedar Creek (fayetteville) NC
Default FMF Powercore and carb rejetting done!

Well I installed the slip on (Powercore 4) and installed a Six Sigma Racing jet kit.

WOW the bike feels alive now. I actually pulled the front tire shifting into second

The jet kit I ordered came with 3 main jets 125, 130 and 135. It had steel shims and a plastic shim for the needle valve. It also came with a couple of drill bits and a screw (to remove the mixture cover). The kit instructions claimed that drilling the slide would have adverse affects on slower driving speeds and was only recommended for off road use.

So I used the 130 main. Installed the thick plastic shim and backed off the mixture screw 3 turns (as recommended in the instructions)

The kit came with no pilot jet but I figured that by backing off the mixture screw 3 turns is where they are richening up the idle to 1//4 throttle range.

Anyway the bike runs much better and there are no flat spots in the throttle.It also warms up much faster and I hardly ever need to use the choke.

Oh and the Powercore 4 is mega loud when you jump on it. not so bad just putting around though.


Just though I would share what I had done so far.

ETA

Fell free to advise me on what I should do next
 

Last edited by Kobrakriss; 08-04-2010 at 02:42 AM.
  #2  
Old 08-04-2010 | 02:46 AM
tremor38's Avatar
Senior Member
Joined: Oct 2006
Posts: 3,106
From: Misawa Japan
1st Gear Member
Default

Glad you like it.....errrr, but you'll have to dyno it to be sure you are getting at least 30rwhp at 11,000RPM, otherwise the bike is under-powered and you'll have to spring for a KTM. :-)

I tell ya, Kawi really missed the mark on this one, IYKWIM. LOL!
 
  #3  
Old 08-04-2010 | 02:51 AM
Kobrakriss's Avatar
Thread Starter
|
Senior Member
1st Gear Member
Joined: Jun 2010
Posts: 131
From: Cedar Creek (fayetteville) NC
Default

Originally Posted by tremor38
Glad you like it.....errrr, but you'll have to dyno it to be sure you are getting at least 30rwhp at 11,000RPM, otherwise the bike is under-powered and you'll have to spring for a KTM. :-)

I tell ya, Kawi really missed the mark on this one, IYKWIM. LOL!
LOL next youll tell me Im too old or have no ***** because I ride a 250
 
  #4  
Old 08-04-2010 | 02:53 AM
GaryC's Avatar
Senior Member
1st Gear Member
Joined: Nov 2008
Posts: 542
Default

I tell ya, Kawi really missed the mark on this one, IYKWIM. LOL![/QUOTE]

WTF?????? is IYKWIM.
 
  #5  
Old 08-04-2010 | 03:02 AM
Arctra's Avatar
Senior Member
Joined: May 2010
Posts: 494
From: Sydney
1st Gear Member
Default

Have you put on a freer breathing air filter (e.g. TwinAir)?
The 13 tooth front chain sprocket was a worthwhile change IMO.
Depending on your weight, getting your front and rear springs done would be money VERY well spent.

Otherwise your bike sounds very similar to mine now. My next steps are:
  • LED/EDGE tail light
  • New Pro-Taper Universal handlebars (only coz my stock ones are bent though). Might look into risers as well.
  • Y junction carb breather pipe mod so I don't struggle going through deep water
  • Braided front brake line (though I'm not in a huge rush to do this)
  • Decent offroad tyres when my stock Dunlops wear out (quite liking WestOzKLX's choice)
 
  #6  
Old 08-04-2010 | 03:11 AM
tremor38's Avatar
Senior Member
Joined: Oct 2006
Posts: 3,106
From: Misawa Japan
1st Gear Member
Default

Originally Posted by GaryC
I tell ya, Kawi really missed the mark on this one, IYKWIM. LOL!
WTF?????? is IYKWIM.[/QUOTE]

I make up acronyms as I go sometimes ... 'If you know what I mean'
 
  #7  
Old 08-04-2010 | 03:17 AM
Kobrakriss's Avatar
Thread Starter
|
Senior Member
1st Gear Member
Joined: Jun 2010
Posts: 131
From: Cedar Creek (fayetteville) NC
Default

Originally Posted by Arctra
Have you put on a freer breathing air filter (e.g. TwinAir)?
The 13 tooth front chain sprocket was a worthwhile change IMO.
Depending on your weight, getting your front and rear springs done would be money VERY well spent.

Otherwise your bike sounds very similar to mine now. My next steps are:
  • LED/EDGE tail light
  • New Pro-Taper Universal handlebars (only coz my stock ones are bent though). Might look into risers as well.
  • Y junction carb breather pipe mod so I don't struggle going through deep water
  • Braided front brake line (though I'm not in a huge rush to do this)
  • Decent offroad tyres when my stock Dunlops wear out (quite liking WestOzKLX's choice)
Snorkel has been removed and it has a Twin Air filter. Ill probably get a 13 tooth front sprocket eventually since everyone says its the way to go.

BTW I just drove it on the highway (I95) and had no trouble keeping up with traffic going 70-75 but Id rather not run those speeds if I can help it.

Im still looking to clean up the rear fender and plate mount and the Edge kit seems only to work on the later model bikes. Mine is a 2006.

Suspension on dirt bikes is something Ill have to study up on. Im 170lbs but I can tell the suspension is a little soft if I ever want to do some hardcore off road riding.
 

Last edited by Kobrakriss; 08-04-2010 at 03:21 AM.
  #8  
Old 08-04-2010 | 03:52 AM
bootmud's Avatar
Senior Member
1st Gear Member
Joined: May 2010
Posts: 102
From: Chambersburg, PA
Default

Adding the 13 tooth front sprocket was the icing on the cake for me. Give just the right amount of torque yet still is enough gearing for on the road.
 
  #9  
Old 08-04-2010 | 04:03 AM
punkenduro09's Avatar
Senior Member
1st Gear Member
Joined: Jul 2008
Posts: 1,439
From: Murrieta, Ca
Default

just ride it. if you find that something bothers you or your missing something, change it. everyones diffrent and expects diffrent things.
 
  #10  
Old 08-04-2010 | 04:35 AM
Kobrakriss's Avatar
Thread Starter
|
Senior Member
1st Gear Member
Joined: Jun 2010
Posts: 131
From: Cedar Creek (fayetteville) NC
Default

Originally Posted by punkenduro09
just ride it. if you find that something bothers you or your missing something, change it. everyones diffrent and expects diffrent things.
Im very happy with the way it is right now. I just want to tune and optimize to get the most out of the platform without sacrificing dependability.

Tweaking and testing is half the fun
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Malves
KLX 250S
33
03-25-2013 07:52 PM
Kobrakriss
KLX 250S
4
07-22-2010 04:33 AM
09klx
KLX 250S
7
04-29-2010 01:47 PM
speedracer138
KLX 250S
0
08-13-2008 04:21 AM
patmandoo
PRIVATE For Sale / Trade Classifieds
1
06-12-2006 12:21 AM




All times are GMT. The time now is 07:58 AM.