nd4speed Tecate 3

[nd4speed]

I also bought a green one for $17 like this one that I forgot to bid on:
http://cgi.ebay.com/ebaymotors/Cycra...em230210667563

I do not believe Cycra makes these any more.

[nd4speed]

Well I bought a KX500 motor with radiators,shock, busted pipe, and motor mounts for $500. The waterpump cover is broke. It is supposed to run and drive. Shifts through all gears, seems to have compression, and the motor turns the primary shaft in all gears. Looks like the head has been off before. No porting. One intake bridge looks to have the infamous crack at the top. I think I paid too much but oh well.

Put some Yamalube in the cylinder. The pics are not that good but a few ?'s:

What is the black stuff flaking off in the intake?
Do the power valves look gunked up?
The cylinder walls looked a bit scraped but not gouged?
How do I tell if the cylinder is plated?

This is going to be expensive and time consuming.

[3Razors]

What year 500 motor? The black stuff in the intake is just paint.

[nd4speed]

It does look like paint but I don't get why it is there unless you are suggesting this is an old black painted motor.

After the KX500 on the frame VIN it said E1 but on the motor it says B1 I think. I have yet to decode the VIN. The guy thought it was a 96.

[nd4speed]

The motor VIN says KX500BE017080

[BigGreenMachine]

89-04, a little vague but hey.

[nd4speed]

The frame VIN did not have "B" in it and did not look like a 1986 frame.

kx500BE;
000001-001800 = '85
001801-004100 = '86
004101-006600 = '87
006601-008500 = '88
008501- on = '89
010701- 004000 ='90
013001- on ='91,'92, '93

[porscheguy944]

I have a KX500 motor but no frame to get the year off of.what year is this motor or where can I find this out at?
email me if you can help me figure this out.
rhedstromii@hotmail.com
the numbers o n the engine cases is KX500BE009101
I think it is between a 1989 and a 2002 enigine but I don't remember the year it was from and I need to order some parts for it and the local kawasaki dealer has been of no help figuring this out for me.

[nd4speed]

Well I am tired of the old 39mm Mikuni VM. I think it has float issues anyway. Just to check I swapped my PWK from my running, problem free KX.

With the good carb, 160 main, at 49 degrees (w/ 1000 ft elevation) in my garage all I could get is a back fire after about six kicks.

Last time I started the motor it smoked a lot like I loaded up the crank case with gas (have had this happen before with the bad VM carb).

Tried to start with fresh plug. Pulled plug and the post above tip (?) had drop of oily dark gas on it.

What makes a 2 stroke backfire? besides the obvious- compression and timing off. The timing is good and it ran with the other carb.

[3Razors]

160 main is pretty lean. Team Green recommends 170 for PWK and that is at sea level to 3000 ft and 70's temp.


http://www.teamgreennews.ca/pdf/2004_jetting_chart.pdf

[nd4speed]

Yes I am pulling that lean PWK off and trying a richer 39mm Mikuni TM. Have to check the reeds now anyway.

New filter and gas. No fuel obstructions.

The spark could be weak or timing off (sheared key),doubt it, but it is a Tecate.
The crank seals could be bad.
The crank case or pipe could have excess fuel in them.
The carb was lean.

[3Razors]

I wouldn't change the whole carb to another you will still be starting from square 1 again. I would jet the PWK according to what Kawasaki recommends the engineers/techs have done the homework for us. If that doesn't work move on to the next area that could be causing the trouble. When you have too many variables at once an accurate troubleshoot cannot be diagnosed. Each component works in conjunction with the other and if one is out of tune then everything is compromised.

[nd4speed]

I just don't have jets for the PWKs that I have. I have lots of Mikuni jets though. I figured I start with the carb.

Just wanted to know if lean condition or excess fuel in crank case would cause this exhaust backfire?

The backfire literally blew a small plastic oil drain pan off a stand like 3 feet from the silencer.

Tonight I also started my $300 86 KX250 for the first time with the junky 40mm VM carb and 330 main it came with. Not much of an option cause it leaks out the bowl overflow pretty bad.

[3Razors]

Both a lean condition or excess fuel can cause a backfire. 2 strokes are very meticulous about having their fuel just right. Dont get into a hurry and try and fix with whatever is handy around the garage. If you dont have the jets just get/order them, do it once and do it right. Follow team greens chart EXACTLY. Also check the float level while you are at it. It should be at 15-17mm.

[nd4speed]

Thanks for all the help and the chart.