KX Riders
  Home Help Login Register   *
Welcome, Guest. Please login or register.
Did you miss your activation email?
July 15, 2019, 09:38:17 PM

Login with username, password and session length
Recent
[July 14, 2019, 10:54:03 PM]

[July 14, 2019, 03:36:07 PM]

[July 14, 2019, 09:09:34 AM]

[July 14, 2019, 08:58:15 AM]

[July 13, 2019, 09:19:26 PM]

[July 13, 2019, 05:50:32 AM]

[July 13, 2019, 05:49:07 AM]

[July 12, 2019, 02:04:04 PM]

[July 12, 2019, 12:51:50 PM]

[July 11, 2019, 07:09:18 PM]

[July 10, 2019, 04:42:58 PM]

[July 10, 2019, 09:06:57 AM]

[July 09, 2019, 04:56:17 PM]

[July 09, 2019, 08:35:25 AM]

[July 08, 2019, 11:57:47 AM]
Pages: 1 [2]   Go Down
  Print  
Author Topic: 07 KTM 250sxf/500kx conversion  (Read 21504 times)
0 Members and 1 Guest are viewing this topic.
umberto
Administrator
Hero Member
*****
Offline Offline

Joined: 01.14.15
Posts: 2,462


First Ride 02-02-19


« Reply #15 on: September 06, 2016, 08:06:48 AM »

You're building quite the stable of cool KTM/K5 conversions.  We'll need pics of this build also.   grin
Logged

Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
Foxx4Beaver
Hero Member
*****
Offline Offline

Joined: 09.08.11
Posts: 8,909


James Stewart DID NOT invent the scrub!!..JoJo


« Reply #16 on: September 06, 2016, 11:47:30 AM »

Fox - Just trying to help out the next guy that might try one of these, as it seems its the small things that are the things that seem to be the issues that need figuring out.

I know....and a fine job you did. afro
all good.
Logged

Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ
hunter
Jr. Member
**
Offline Offline

Joined: 07.24.16
Posts: 19


« Reply #17 on: September 26, 2016, 07:47:51 PM »

Update-

Not much has happened lately, using my buddies garage for the project so the last few weeks hes needed it. Exhaust is done and mounted but really not happy with it. Sticks up above the rear fender, needs some pipe cut down and a mount made. With that said, its not a high priority and can be done when ever.

For those that might be trying to run the G2 2stroke perch and PWK39 (or other PWKs ?) I ended up using a Motion pro T3 #10-3000. Threads into the carb cap and the perch and solves the WOT if the cable gets pulled. This cable is for KTM 2strokes and is 5inches longer then there stock cable, and is about factory length for the two Kx500 cables I have here.

Just need a day to put it all back together, mount the two perches and prey like hell it starts up lol. Getting excited, should have been done by now. Hopefully get to ride it a bit then I will tear it all down for powder coating this winter and take care of any details that need to be addressed.
Logged
hunter
Jr. Member
**
Offline Offline

Joined: 07.24.16
Posts: 19


« Reply #18 on: October 02, 2016, 03:47:42 PM »

Update:

Bike runs, no leaks, started 3rd kick and idled somewhat lol.

Still lots of small things to do along with getting jetting correct. I did ride it around a bit and it seemed pretty boggy in the bottom end but seemed to clear up some in the higher rpms. Also seemed to power out pretty fast. Most certainly not a wheelie monster yet lol

I was ear to ear smiles when she started and idled.
Logged
hunter
Jr. Member
**
Offline Offline

Joined: 07.24.16
Posts: 19


« Reply #19 on: October 09, 2016, 12:25:12 AM »

Update:

My buddy and I worked on my jetting today, started off at 168/58 needle in 3 clip, 1.5 out on the air screw which was my base jetting. I was running extremely Rich. We started leaning things out and at this time we are at 158/42 , needle clip in the second from the top 1.5 out on the air screw.

Mid has cleaned up tremendously, still a little bit fat down low. Going to hopefully try a 40 tomorrow and see if that helps.
Logged
Smokinbigbore
Newbie
*
Offline Offline

Joined: 12.17.16
Posts: 2


« Reply #20 on: December 17, 2016, 05:27:59 PM »

Build is looking great! I am creating the same monstrosity- 2007 450 SXf with 1985 KX500.
I have made an adapter plate to convert the carb boot to the later 6 bolt later type. I've also got the later Kehin carb also(1994). I used a 2007 300 exc air box boot to connect box to carby which fits perfect.
Logged
hunter
Jr. Member
**
Offline Offline

Joined: 07.24.16
Posts: 19


« Reply #21 on: June 16, 2019, 04:46:08 PM »

LONG OVERDUE UPDATE! -

SO a lot of things went sideways on me on this build.

1. Lost compression out doing final jetting. Don't know if I ran it to lean or what. Was able to limp the bike home. Looking back, was probably low compression to begin with as it wasn't to hard to kick over.

2. Had my jug bored out for a 87mm Wosner piston. Went to install and ring gap was all wrong and to wide. Come to find out the guy that bored it went to far so I had to much slop. Had to take it somewhere else a yr later to bore it once more to 87.5. New Wosner piston of course.

3. When I had the motor out I said aww screw it Ill have the frame and some misc parts Powdercoated Kawi Green. Powdercoat Shop screwed the pooch and I lost my VIN. 7months of back and forth with WSP and a drive finaly across the state and I was able to recover my VIN....it now looks like a drunk 3yr old punched the numbers into my frame. WSP....if your read this figure out a new system.


Where I am now! -


1. Motor is put back together minus the head which is currently with our very own Larry getting his work done.

2. Just picked up a older PWK 38 airstriker to replace the pwk39

3. Figure out a better airfilter system - looking at going pod with cover or possibly a newer airstriker that is shorter to allow the ktm boot to fit better.

4. Fix my muffler mounting, guy that welded up my stinger went all free lance on me. Need to cut the welds and redo it so I dont have to cut the rear fender to fit.

5. Buy supermoto tires to put on my Behr Supermoto wheels

6. Wire up the bike for the street and get in inspected and get a plate.

7. Terrrorize the back roads!!!!

On a side note, Ive been searching some starting points with this carb for the 5-hundy. Theres nothing wild about my motor 1.5mm over with some porting in the jug. The airstriker currently has a #6 slide, and r1172n needle. There are some scratches on the front of the slide, nothing you can feel. I have read about useing the Yamaha needle and thats about it. Also heard the STIC metering block is the tits...just dont have the coin for that right now.
Logged
dave916
Hero Member
*****
Offline Offline

Joined: 04.06.09
Posts: 537



« Reply #22 on: June 17, 2019, 06:33:03 AM »

jetting i would be starting AROUND 1368n needle  52piloT 170main

Check the metreing block oing before you start {youtube it}
Logged
umberto
Administrator
Hero Member
*****
Offline Offline

Joined: 01.14.15
Posts: 2,462


First Ride 02-02-19


« Reply #23 on: June 17, 2019, 08:44:35 AM »

jetting i would be starting AROUND 1368n needle  52piloT 170main

Check the metreing block oing before you start {youtube it}
Mine was bad on my carb before I changed over to a Lectron.  Changing that o-ring made a big difference.
Logged

Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
dave916
Hero Member
*****
Offline Offline

Joined: 04.06.09
Posts: 537



« Reply #24 on: June 17, 2019, 11:13:14 AM »

jetting i would be starting AROUND 1368n needle  52piloT 170main

Check the metreing block oing before you start {youtube it}
Mine was bad on my carb before I changed over to a Lectron.  Changing that o-ring made a big difference.
Most metering block oring seals are leaking on secondhand pwk /  3 or four differant points where the leak 


https://www.ebay.com/itm/Jet-block-o-ring-1-Keihin-PWK-33-41-carburetor-35-36-38-39-40-mid-body-gasket-/201306545569

the price of them seems to gone up over the past  months smiley
Logged
dave916
Hero Member
*****
Offline Offline

Joined: 04.06.09
Posts: 537



« Reply #25 on: June 17, 2019, 11:15:55 AM »

What kind of gasket carb sealer does everbody  use to hold oring in position for fitting?
Logged
hunter
Jr. Member
**
Offline Offline

Joined: 07.24.16
Posts: 19


« Reply #26 on: June 17, 2019, 06:08:09 PM »

Will definitely look into the metering block oring. Thanks for the heads up on that one.
Logged
hunter
Jr. Member
**
Offline Offline

Joined: 07.24.16
Posts: 19


« Reply #27 on: June 17, 2019, 06:11:17 PM »

jetting i would be starting AROUND 1368n needle  52piloT 170main

Check the metreing block oing before you start {youtube it}

Keep the #6 slide as well?
Logged
dave916
Hero Member
*****
Offline Offline

Joined: 04.06.09
Posts: 537



« Reply #28 on: June 20, 2019, 03:15:54 PM »

jetting i would be starting AROUND 1368n needle  52piloT 170main

Check the metreing block oing before you start {youtube it}

Keep the #6 slide as well?

never noticed much differance with slides / 6 or 7 fine
Logged
Pages: 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
TinyPortal v0.9.7 © Bloc
Valid XHTML 1.0! Valid CSS!
Page created in 0.119 seconds with 27 queries.