Recent Posts

1

KX500 Original / Re: KX500 RH Crankcase cracked

« Last post by sandblaster on Today at 02:08:15 AM »

Welcome to the forum.
PM me the pics and I will post them.
I have fixed a fair sized pile of cases so depending on the specifics my bet is that it can be done.

2

KX500 Original / KX500 RH Crankcase cracked

« Last post by Dad of Alf on November 11, 2019, 09:57:23 PM »

Hello all,
This is my first post on the forum, but I have been reading the topics on here for some time now. My son races a KX500 in the UK, he's only 19 and loves the 500.

Our 1989(?) KX500 showed typical drive side main oil seal gone symptoms (oil loss, smoking). Upon strip down found a small crack on the oil seal/main bearing housing. I'm a bike mech and an engineer so I like to think I know what I'm taking about (unless you speak to my Wife, daughter, son, family, close friends etc etc).
The plan is to weld up said crack, dress the inside oil seal/bearing faces whilst leave the outside for strength.

I am unable to post pics, sorry.

What are peoples thoughts about this issue.
Many thanks in advance for your help.
Kingsley

3

OEM-CYCLE / Re: 2016 Pumpkin seed build...

« Last post by sandblaster on November 11, 2019, 04:38:48 PM »

The KtX500e being used for taxi service 😆
#Motocrossactionmagazine #KXGuruRacing #KtX500e #Kawakaze

4

I didn't find an answer or I need more info / 1987 KX250 Jetting Baseline for Standard PWK38

« Last post by Faceplant on November 11, 2019, 03:54:17 PM »

Looking for a good starting point for a new Standard PWK38 for post Classic racing. Searches have failed to find anything other than what was stock 32 years ago. Has anyone upgraded from the stock round slide to the standard PWK38mm? What jets needle and slide did you run?
 
My ride;

Running on,
Super Premium Fuel
40-1 mix

Bike 1987 KX250 with,
Stock Porting
Stock Pipe
Rad 12 Valve Block

Environment,
25 °Celsius / 77 °Fahrenheit to 32°Celsius / 87 °Fahrenheit
0-400 meter Alt.

Thanks in advance for any suggestions.
Phil

5

KX500 Original / Re: Bolt Mod Alternative Question

« Last post by Rubix1555 on November 11, 2019, 03:38:55 AM »

Thanks for the reply.  I’ll try that and post my results.

6

KX500 Original / Re: Bolt Mod Alternative Question

« Last post by dave916 on November 10, 2019, 11:04:06 PM »

You will need to fit a 4mm aprox/ stopper spacer on primary side of kips rod/ or the open position will be wrong { over open}
 i made one from a little nut/ drill the centre to size so it a tight fit on kips rod/ grind the outsde and locite it in position /simple 
 
Once you get the fully opened position correct {with locking screw tight} you can fine tune the closed position with kipps bolt {shims or washers}
check my old post here to see  the stop/nut   BLACK  ARROW bottom timber  point to nut/stop
http://www.kxriders.com/forums/index.php/topic,15479.msg124009.html#msg124009

7

KX500 Original / Bolt Mod Alternative Question

« Last post by Rubix1555 on November 10, 2019, 05:41:28 PM »

Hello,

I've read a lot about the bolt mod to fix the valves from over closing but I've also seen a video on youtube where the the exhaust valves are lined up in the closed position (flush not overclosed).  Then the shaft with the timing marks is installed after the bolt on the other side of the cylinder has already been screwed in.

Is this a good alternative or will this mess up the power valve operation?

youtube video about 7 minutes in is the part I am referencing : https://www.youtube.com/watch?v=sjTFXqWl3n0

8

OEM-CYCLE / Re: 2016 Pumpkin seed build...

« Last post by sandblaster on November 10, 2019, 10:39:56 AM »

Met a ton of cool people at Glen Helen, From far left to right.. Blake Clark, David Olsen, Me, Adam MillAr, Destry Abbott, Jason Tanner, and Cooper Destry Abbott
#Motocrossactionmagazine #Kawakaze #ktx500e

9

OEM-CYCLE / Re: 2016 Pumpkin seed build...

« Last post by sandblaster on November 10, 2019, 06:04:25 AM »

Sweet!...looks awesome!... I like the looks of the "shorter" silencer too.

Thanks!
I received some criticism about killing performance ect on other social media sites.
Nobody that has rode the bike has complained about not having enough power 

What we are doing to get the power is far different then how we use to get the power..

10

OEM-CYCLE / Re: 2016 Pumpkin seed build...

« Last post by Foxx4Beaver on November 10, 2019, 03:55:26 AM »

Sweet!...looks awesome!... I like the looks of the "shorter" silencer too.