Posts
122
Joined
5/17/2022
Location
Costa Mesa, CA, USA
Well since I found the spot, I will post the project that I did with my son. This started in Covid but we were never able to find any good base bike. I wanted more that just paint and replace parts. With items of this age, there is slways more than meets the eye. We saw this bike run and ride. After taking it apart it was lucky it ran. 
The list of missing bits was long.
Missing bearing spacer in rear wheel.
Missing steel water pump impeller. ( still available )
Carburator was too small for the intake boot.
Tank was cracked.
Missing fuel tank cap.
Water in fuel.
Rust in cylinder.
Would not shift correctly
Shock had broken clevis and rusty shaft.
For those items NLA from Kawasaki or aftermarket, Ebay provided the necessary replacement bits. Transmission was able to shift with some things replaced. A different shock was found. UFO plastics seemed to match the colors available from the local powdercoater. The tank seemed to be the missing piece.
Pete at Motoman Dist was able to source a tank that fit the 1991 250. Kawasaki shows that both 1990/1991 125 and 250 share the same tank. My photo shows the small variance between the aluminum and OE plastic tank. I used a mount spacer to give the coil some clearance. Moving the coil before frame painting or dimpling the tank are options that I did not explore.
This current part number can provide a workable lower brake line guide. Any details on shock upgrade?
1990/1991 KX125/250 tanks share the same part number now but you can't put a 1990 tank on the 1991s and bolt it down all the way. The middle mount got moved down and back about 10mm for 1991. Apparently, it's fine putting a 1991 tank on a 1990 though. I learned this the hard way.
Gcrites,
Maybe you and my photo tell the correct story. The tank was fitted on a 1991 250. The depression for the coil seemed to be the location of the interference. Did the coil get relocated on the 1991 125? Do both 1991 and 1992 250’s have the coil in a different location from the 125’s?
The Shop
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
Luxon 4-Post Bar Mounts
$189.95 - $239.95
The Aluminum tank was made to fit a 250 not a 125. Kawasaki made 1 tank to fit both 125 and 250.
I only have access to my 1991 125, but that sounds like the exact type of thing that would cause the misalignment I have when trying to use a 1990 tank. Both the KX125 and 250 received new microprocessor ignitions for 1991.
Post a reply to: 1990 Kawasaki KX 125