Jetting!!! Again and again and again!

[alexander-vmann]

Im looking for a starting point, i want to switch to 32:1 becuse i heard this will help with sealing the piston rings better, im hoping this can help with the scratches that are on the front wall of the cylinder, i supsect fuel might leak past the rings, but i doubt it, at least i want to make sure the scratches dont get worse until i can fix it, anyways i want to use 32:1 on 98 octane fuel (norwegian/european rating) im at sea level, temprature is between 10 to 25 celius, my engine is a 1987 mod but the carb is a 1993 mod,

[dave916]

https://www.revzilla.com/assets/0000/9709/fmf_gold_series_gnarly_pipe_kawasaki_kx50019882004.pdf

1988 jetting would be a good safe starting point {only year with same case volume}/ stock needle 1368n/ 175/ 62
87/ 88 should in theory require richest jetting due to bigger case volume
Say that i am running 160main/50pilot on a 88 but the has been blueprinted /modified inlet/differant header lenght on exhaust/ reduced case volume/ 
Things can vary so much from motor to motor 

[alexander-vmann]

https://www.revzilla.com/assets/0000/9709/fmf_gold_series_gnarly_pipe_kawasaki_kx50019882004.pdf

1988 jetting would be a good safe starting point {only year with same case volume}/ stock needle 1368n/ 175/ 62
87/ 88 should in theory require richest jetting due to bigger case volume
Say that i am running 160main/50pilot on a 88 but the has been blueprinted /modified inlet/differant header lenght on exhaust/ reduced case volume/ 
Things can vary so much from motor to motor 


Mine seems to always be running rich even on stock 1993 jetting, (lots of smoke and oil in the exhaust)

[dave916]

double check the choke circuit

Could be a carb problem , I have a pwk carb that seem to run crazy rich {like if the choke is on} even though i have triple checked everthing, I ended up swapping it for another one

[alexander-vmann]

double check the choke circuit

Could be a carb problem , I have a pwk carb that seem to run crazy rich {like if the choke is on} even though i have triple checked everthing, I ended up swapping it for another one

i have installed a new choke, maybe i got it wrong somehow, i put in a 165 main and 55 pilot, set the airscrew when the bike was running and ran a little test, the bike was scary powerfull and ran so strong i didnt dare use full throtle, but my dad say that it was smoking alot? Im running at 32:1 but i still dont think it should be smoking tjis much, there is also alot of oil in the exhaust so i think a cylinder hoon and repair is needed, anyways, i think its pinging? Does anyone have a video of a bike pinging so i can compare the sounds?

[dave916]

If it running strong and smoking alot it could be crank seal{sucking gear oil}

[alexander-vmann]

If it running strong and smoking alot it could be crank seal{sucking gear oil}

i think ill start with thd carb first😂

[alward25]

What Pre-mix?  Is it formulated to run @ 32:1?  If not, may explain the spooge.  Unless your over 3000ft, I would not run a 165 main.  Assume your are running a 39 PWK.

[alexander-vmann]

What Pre-mix?  Is it formulated to run @ 32:1?  If not, may explain the spooge.  Unless your over 3000ft, I would not run a 165 main.  Assume your are running a 39 PWK.

a 39 pwk yes,  sandblaster pointed out that motul 800 should be 50:1, so im changing that and main

[umberto]

Glad to see you back alexander-vmann.  Keep us posted on your progress.

[alexander-vmann]

Glad to see you back alexander-vmann.  Keep us posted on your progress.

today the oil plug fell out. So i got a random plug from a subaru rally car, and ALOT of loctite

[Markafc]

CHECK the needle valve, they wear out, it'll look oblong and you'll be in the 40's on the idle jet and it'll still run rich. It's located in the jet block on pk series, mine a 39mm and everyone will say you can't find them but they are available. Contact http://www.sticsupertorque.com/shop.html; they don't publish them as available but they have them, just ask. Under a 100 bucks and no need to buy another carb.