2005 KX 125 Tip & Tricks?

Arkmx
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Arkmx
Edited Date/Time 10/28/2014 7:32pm
Just picked one up for Trace to move up too yesterday (he does not know about it yet).

No pics yet. Needs a little TLC but overall not bad, stock tires and a fresh motor.

There are things in the works like re-jetting, some plastic with graphics and numbers, change heavy springs back to stock & re-valve and go from there, add Engine Ice & Lucas Oil as required, tires etc., etc.

I know there are all kinds of things that can be done to it, but I was wondering what Tips & Tricks you have done that worked or did not work for what ever reason?

Pics when it's ready to go....

Thanks in advance!

JG.
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kripple428
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kripple428 7/27/2011 1:40pm
7/27/2011 1:40pm
Arkmx wrote:
Just picked one up for Trace to move up too yesterday (he does not know about it yet). No pics yet. Needs a little TLC but...
Just picked one up for Trace to move up too yesterday (he does not know about it yet).

No pics yet. Needs a little TLC but overall not bad, stock tires and a fresh motor.

There are things in the works like re-jetting, some plastic with graphics and numbers, change heavy springs back to stock & re-valve and go from there, add Engine Ice & Lucas Oil as required, tires etc., etc.

I know there are all kinds of things that can be done to it, but I was wondering what Tips & Tricks you have done that worked or did not work for what ever reason?

Pics when it's ready to go....

Thanks in advance!

JG.
it's not really anything amazing but it does look cool! you can take the 09-11 kawi 250f front fender and front number plate and put on the 03-05 model 125's
rmpilot
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rmpilot 7/27/2011 1:48pm
7/27/2011 1:48pm
twisting the throttle father usually works.
crf250pilot
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crf250pilot 7/27/2011 1:56pm
7/27/2011 1:56pm
V-force3 reeds and race fuel work wonders. I use torco hot rod 110.
Cygnus
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Cygnus 7/27/2011 1:57pm
7/27/2011 1:57pm
Vforce and a pro circuit pipe can't hurt.

The Shop

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millertime603 7/27/2011 2:59pm
7/27/2011 2:59pm
I ran d.e.p pipe and silencer, Vforce, and an i-cat/ I boost. on my 125's. People bad mouth the icats but it made a pretty big noticiable difference in the low to mid range. The I cat is deff worth the money
aFACEdismembered 7/27/2011 3:58pm
7/27/2011 3:58pm
rmpilot wrote:
twisting the throttle father usually works.
I thought only factory guys could get their hands on throttle father's?

All in good fun. Cheerful
Arkmx
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Arkmx 8/16/2011 6:02am
8/16/2011 6:02am
Thanks for some of the ideas!

Here are a couple of photos during phase 1... Getting numbers...

Full graphics kit will be later along with other odds and ends...









Trace was excited when he found out about the bike. Zach wants to race it next year in Schoolboy 1 for the LL's qualifiers....

More photos as the 2005 KX 125 project continues.

When do I need to shim the valves on this bike?? Tongue

JG.
nytsmaC
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nytsmaC 8/16/2011 7:52am
8/16/2011 7:52am Edited Date/Time 8/16/2011 7:53am
Shorten the throttle cable so that the slide is hung wide open.
jeffro503
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jeffro503 8/16/2011 8:11am
8/16/2011 8:11am
Unbolt the motor and suspension and send the whole package to Mitch at PC......just tell him to "make it sing".
jeffro503
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jeffro503 8/16/2011 8:11am
8/16/2011 8:11am
nytsmaC wrote:
Shorten the throttle cable so that the slide is hung wide open.
HAHA!! Woohoo
mxb2
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mxb2 8/16/2011 8:25am
8/16/2011 8:25am
Nice plug for lucas oil and engine ice, i guess you get it free lol
tbanks
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tbanks 8/16/2011 8:32am
8/16/2011 8:32am
A change in reeds are a must. Vforce or Boyesen? are good. For my KX125 I wanted as much bottom as I can get. The mid-to-high rpm range is where it shines, but some more bottom wouldn't hurt.

I hope your boy has fun on that thing......
mx196
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mx196 8/16/2011 9:22am
8/16/2011 9:22am
If u want to do a little internal work i reccomend getting it port and polished. It feels like a brand new bike once the cylinder is cleaned up. And of course a pipe setup, it'll be alot crisper.
Arkmx
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Arkmx 8/16/2011 11:05am
8/16/2011 11:05am
mxb2 wrote:
Nice plug for lucas oil and engine ice, i guess you get it free lol
They are some of our sponsors, along with others. Any type of help is always appreciated.!
Arkmx
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Arkmx 8/16/2011 11:12am
8/16/2011 11:12am
jeffro503 wrote:
Unbolt the motor and suspension and send the whole package to Mitch at PC......just tell him to "make it sing".
I have sent a few emails inquiring about some things, but their customer service seems to be lacking in customer service at this point.

Not bagging PC, but most emails I send inquiring about service, product etc., I get a reply within a few minuets to a couple of hours, not days with no response..... Just saying...
Arkmx
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Arkmx 8/16/2011 11:13am
8/16/2011 11:13am
tbanks wrote:
A change in reeds are a must. Vforce or Boyesen? are good. For my KX125 I wanted as much bottom as I can get. The mid-to-high...
A change in reeds are a must. Vforce or Boyesen? are good. For my KX125 I wanted as much bottom as I can get. The mid-to-high rpm range is where it shines, but some more bottom wouldn't hurt.

I hope your boy has fun on that thing......
Yes it does need more bottom end.!

Thanks for the info!
Switch
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Switch 8/16/2011 11:20am
8/16/2011 11:20am
My personal preference would be black rims and gold chain, but everyones different.

x2 on the fender/number plate.
Arkmx
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Arkmx 8/16/2011 11:45am
8/16/2011 11:45am
jeffro503 wrote:
Unbolt the motor and suspension and send the whole package to Mitch at PC......just tell him to "make it sing".
Arkmx wrote:
I have sent a few emails inquiring about some things, but their customer service seems to be lacking in customer service at this point. Not bagging...
I have sent a few emails inquiring about some things, but their customer service seems to be lacking in customer service at this point.

Not bagging PC, but most emails I send inquiring about service, product etc., I get a reply within a few minuets to a couple of hours, not days with no response..... Just saying...
I did get a call from PC while I was out to lunch, all is good!

Pit Row

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mxb2
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mxb2 8/16/2011 11:48am
8/16/2011 11:48am
jeffro503 wrote:
Unbolt the motor and suspension and send the whole package to Mitch at PC......just tell him to "make it sing".
Arkmx wrote:
I have sent a few emails inquiring about some things, but their customer service seems to be lacking in customer service at this point. Not bagging...
I have sent a few emails inquiring about some things, but their customer service seems to be lacking in customer service at this point.

Not bagging PC, but most emails I send inquiring about service, product etc., I get a reply within a few minuets to a couple of hours, not days with no response..... Just saying...
Tell them your last name is Pourcel, they will get back to you quicker LOL!
MIKE246102
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MIKE246102 10/25/2014 6:47pm
10/25/2014 6:47pm




Tom Morgan Racing porting,v force,scalvini pipe,PCR shorty.Race Tech suspension
Sir Roostsalot 10/25/2014 7:25pm
10/25/2014 7:25pm
See if you can get a set of forks from an 05 to 07 KX250 (2 stoke) they are twin chamber KYB as opposed to single chamber non recirculating KYB on the 125. FAR better forks and they will bolt right up to wheel , caliper and triple clamps. Springs should crossover.(?)
jloucks742
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jloucks742 10/25/2014 7:27pm
10/25/2014 7:27pm


V Force reed cage, pipe and exhaust will make a huge improvement without having to really do anything major with the engine. Oh, and add a tooth to the rear sprocket...
MIKE246102
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MIKE246102 10/27/2014 6:02pm
10/27/2014 6:02pm
anyone tried Yamaha sss forks on one? I have a 06 YZ and all the dimensions are the same.curious to bolt then on my KX and see how it works
Greg726
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Greg726 10/28/2014 1:05pm
10/28/2014 1:05pm





Here is a few pics of my 03 125.

V-force reeds
Athena works cylinder kit
Powder coated Flo green frame
Ti white bro foot pegs
PC works pipe
Answer carbon fiber silencer
Devol suspension
breaking wave front rotor
#991
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#991 10/28/2014 1:17pm
10/28/2014 1:17pm Edited Date/Time 4/3/2015 3:42am
...
superorbital
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superorbital 10/28/2014 6:59pm
10/28/2014 6:59pm
52 tooth sprocket add a pro circuit rear linkage along with the pipe and silencer. Just ask pro circuit everything they did to their 125s and you will have it made.

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