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Author Topic: KX500 AF Running like a 200  (Read 26727 times)

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Offline RKPerformance

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Re: KX500 AF Running like a 200
« Reply #45 on: May 17, 2013, 02:31:46 PM »
No I welded the kx500 mouth (cylinder mount) on the cr500 pipe.  But things just dont seem to line up at all and dont fit where they are supposed to.  s**t hits the left radiator and waterpump side is no where near close to clearing the cylinder etc.  Im lost when it comes to this unless i can get a custom made pipe
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Offline motopunk

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Re: KX500 AF Running like a 200
« Reply #46 on: May 17, 2013, 05:07:34 PM »
i used the original k5-radiators on my projekt... and all fits well in the ī93-steel-frame .


i think in first you should find out, how much you can lift up the left radiator for pipe-clearance.. and in the case that it works,  weld on new rad-mountings to the frame...

post some pics, that we can see your major-problems.



Today we stand at the edge of the canyon, tomorrow we are one step further... :evil:... :-D
« Last Edit: May 17, 2013, 05:13:04 PM by motopunk »
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

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Offline RKPerformance

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Re: KX500 AF Running like a 200
« Reply #47 on: May 18, 2013, 06:14:21 AM »
So i put the original pipe back on and ran it again.  It runs like the choke is stuck on (but it is not).  Im at a loss without being able to try a 500 pipe and silencer. 
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Offline motopunk

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Re: KX500 AF Running like a 200
« Reply #48 on: May 18, 2013, 07:24:48 AM »
Quote from: RKPerformance on May 18, 2013, 06:14:21 AM
So i put the original pipe back on and ran it again.  It runs like the choke is stuck on (but it is not).  Im at a loss without being able to try a 500 pipe and silencer. 

 :roll: :roll:... i repeat: post some pics, that the kawasaki-doctor can help with the right therapy for your sick bike...  :wink:
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline sandblaster

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Re: KX500 AF Running like a 200
« Reply #49 on: May 18, 2013, 07:50:55 AM »
Men of steel can't read to good.
We like pics  :-D
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Offline RKPerformance

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Re: KX500 AF Running like a 200
« Reply #50 on: May 18, 2013, 01:06:09 PM »
I'll get pics up for ya'll when it quits raining and snowing here!  I went out took the governor rod cover off and checked valve operation again and it sure seems to be going out and in just fine.  The carb is a 40.5mm bored PWK.  How does a bigger carb affect the jetting?  Does anyone know what kind of main and needle a guy would run with this carb?  That might be why it has a kx250 needle in it.  I finally figured out a way to get the cr pipe to get in there but it needs quite a bit of denting to get it runable.  then i will be on to figuring out the cr5 silencer, which i dont think will be to bad to get to mount up. :evil:
« Last Edit: May 18, 2013, 01:33:59 PM by RKPerformance »
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Offline motopunk

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Re: KX500 AF Running like a 200
« Reply #51 on: May 18, 2013, 04:31:20 PM »
that sounds, that you slowly find the way to finish this problem...  :wink:

question: it snows and rains also inside your garage, if you want to make the pics??  :lol:.... the kawasaki-doctor-team need no pro-pics to see the bike with the wrong exhaust and details of your fitting problems with the cr500-pipe .  8-)


...big bored carbs like your 40mm pwk or bigger are used for more airflow which makes sure, that the bike runs well in higher rpmīs like its needed for example in highspeed-runs.

for use on small mx-tracks or wood-riding, where is much power from bottom needed are smaller carbs like the stock 39mm or a 38mm in use on the k5.
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline nirvanafan98

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Re: KX500 AF Running like a 200
« Reply #52 on: May 18, 2013, 05:49:34 PM »
Like reading this thread . But I don't think my problem is crankcase seal related .
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Offline conbread

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Re: KX500 AF Running like a 200
« Reply #53 on: May 19, 2013, 02:52:19 AM »
i just got mine back togeather and it was running super lazy.. so i checked the plug and it was fine... so i got to thinking about timming, so i looked in my manual of how to set the timming up... when i pulled the flywheel off sure enough it was fully retarded... now its back at the factory marks and the bike runs great...  so mabey u guys can check your timming..
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Offline motopunk

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Re: KX500 AF Running like a 200
« Reply #54 on: May 19, 2013, 04:06:38 AM »
Quote from: conbread on May 19, 2013, 02:52:19 AM
i just got mine back togeather and it was running super lazy.. so i checked the plug and it was fine... so i got to thinking about timming, so i looked in my manual of how to set the timming up... when i pulled the flywheel off sure enough it was fully retarded... now its back at the factory marks and the bike runs great...  so mabey u guys can check your timming..

you can timing night and day, but a 500  will never run properly with a 250 pipe...cause the expansion chamber is much to small. thats the point,that we turning around ... timing and eventual jetting are the steps 2 and 3 after installing the right expansion chamber. and i think, if this 3 steps are done the beast awakes with its true powers...  :-D
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline brooksie

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Re: KX500 AF Running like a 200
« Reply #55 on: May 24, 2013, 02:28:34 PM »
Change the freakin' pipe!  :-D

It could be that the 250 pipe afforded a longer left rad to be fitted. The PO clearly didn't have any reservations about using whatever he had lying around to get the thing up and running. You need a short left rad for the 500 pipe to clear, ie a STOCK KX500 rad with the mounts changed to suit. The pipe really curls round and back on its self on the left, you won't make it work any other way.

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Offline LundMx

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Re: KX500 AF Running like a 200
« Reply #56 on: May 24, 2013, 05:40:19 PM »
Had to try this and guess what, after i adapted the kx250 pipe on there, though it fit better, it ran like a 125! I had to clutch the thing to get it on pipe! Cr500 pipe is a must! (Here is some pictures of the kx250 pipe while it is still on
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LundMx

Offline motopunk

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Re: KX500 AF Running like a 200
« Reply #57 on: May 24, 2013, 06:21:44 PM »
Quote from: LundMx on May 24, 2013, 05:40:19 PM
Had to try this and guess what, after i adapted the kx250 pipe on there, though it fit better, it ran like a 125! I had to clutch the thing to get it on pipe! Cr500 pipe is a must! (Here is some pictures of the kx250 pipe while it is still on



a 500  will never run properly with a 250 pipe...!!!  :wink:
 i used a cr500 pipe and thats the only way for the sf-projekt...  :-D
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big 2 stroke bikes are weapons for real men, who donīt fear death or devil. ;O)
ī83 kx250, ī87 kx250 (with 360 big bore), 87 kx500, ī93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline RKPerformance

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Re: KX500 AF Running like a 200
« Reply #58 on: May 26, 2013, 01:41:09 PM »
HAHA well guys finished my monster garage pipe fabrications and used a cr500 pipe from a SH CR500.  Mounted the kx flange and made a little roll dent around the waterpump pipe and blamo she fit like a glove.  Got a pro circuit silencer for a cr500 and cut the mounts off and tig welded it in the center where the bike mount was.  Easy to get the silencer on the money.  Welded my mounts into place and kicked her over.  Instantly upon twisting the throttle i knew better things were to come.  Geared up and went for a rip, 1000000X better!  Changed the kx250 needle out for the stock kx5 needle.  Ran even better.  Doesnt idle so great tho.  Seems to idle high and then after awhile it will idle down and stall.  Think there is a 52 slow in there.  165 main.  Anyone got any suggestion for me.  Vforce 3 reeds, and 40.5mm carb. 
PS ya'll were right that old yz bulls**t hillbilly pipe was killin me.  I will get pics up of my custom exhaust!
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Motorrad

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Re: KX500 AF Running like a 200
« Reply #59 on: May 26, 2013, 02:10:51 PM »
Quote from: RKPerformance on May 26, 2013, 01:41:09 PM
HAHA well guys finished my monster garage pipe fabrications and used a cr500 pipe from a SH CR500.  Mounted the kx flange and made a little roll dent around the waterpump pipe and blamo she fit like a glove.  Got a pro circuit silencer for a cr500 and cut the mounts off and tig welded it in the center where the bike mount was.  Easy to get the silencer on the money.  Welded my mounts into place and kicked her over.  Instantly upon twisting the throttle i knew better things were to come.  Geared up and went for a rip, 1000000X better!  Changed the kx250 needle out for the stock kx5 needle.  Ran even better.  Doesnt idle so great tho.  Seems to idle high and then after awhile it will idle down and stall.  Think there is a 52 slow in there.  165 main.  Anyone got any suggestion for me.  Vforce 3 reeds, and 40.5mm carb. 
PS ya'll were right that old yz bulls**t hillbilly pipe was killin me.  I will get pics up of my custom exhaust!

whats your altitude?

sea level  you should be..

58m
168 - 170 M   

middle clip on needle.

2-2.5 turn on air screw
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