Just noticed the MPS graphics on the the 2 stroke. I've bought 2 bikes from there. Are you located somewhere around here in SW MO? Keep up the great vids!
Good question! Here's what I came up with: Low compression: -Compression test - 15% or more LESS than new -Keeps getting richer each time you ride -Very easy to kick over -Won’t idle even with idle cranked in and the air screw adjusted Rich jetting: -Symptoms have always stay the same unless there’s a big change in weather/elevation -An air screw adjustment makes a noticeable change in symptoms -Compression is still good -Feels strong when kicking over -Compression test shows proper PSI (same as new or within 10%) Let me know if that helps :) -Kelley
My bike has a lot of these but I was thinking carburetor and it is running rich because it has a lot of spooge and the top end was supposed to have just been redone. It does idle good and doesn't foul out spark plugs it just gets covered in black mess until it won't fire until I wipe it off after a bit usually idling too long though. I did also notice the needle valve has no spring where the float goes up on it. I hope I didn't get ripped off.
Hey David, it does sound like it might just be running to rich. If the float needle is worn out, that might be causing the float height to be too high and making the mixture rich across the board. I made another video recently on properly adjusting and measuring the float height.
Float height doesn't make that much sense to me because of the orientation of the carb Not sure which is up or down regarding float because of that hence making it difficult for me to understand "too high or low" Should I reference up or down according to how the bowl sits when installed I also did bend the tab trying to lift the float and made it far worse to where it just keeps dying initially after starting so I probably went the wrong way but the float didn't seem to move much even though I bent the tab quite a bit up (or down since I'm not sure which way is which) I'm afraid I may have ruined the float metal portion. I'll check it out that video again. Seems like an easy thing but not when you've never done it and these carbs are so touchy
![Why Your 2 Stroke Dirt Bike Has LOW Compression [Top 5 Causes]](http://i.ytimg.com/vi/dda0TZMYARo/mqdefault.jpg)
![Why Your 2 Stroke Dirt Bike Has LOW Compression [Top 5 Causes]](/img/tr.png)
![How To Tell If Pilot Jet Is Rich or Lean [Jetting Symptoms]](http://i.ytimg.com/vi/dzFzWIZsuDg/mqdefault.jpg)
How many signs does your 2 stroke have?
Part 2 on What Causes Low Compression? - th-cam.com/video/dda0TZMYARo/w-d-xo.html
Thank You Very Much For Sharing 👍
Just noticed the MPS graphics on the the 2 stroke. I've bought 2 bikes from there. Are you located somewhere around here in SW MO? Keep up the great vids!
Nice! No, I'm in MN and this is my best friends bike. He bought it used, so not sure who put those graphics on.
Thanks for watching, Marc!
How do you differentiate between low comp and rich jetting ?
Good question! Here's what I came up with:
Low compression:
-Compression test - 15% or more LESS than new
-Keeps getting richer each time you ride
-Very easy to kick over
-Won’t idle even with idle cranked in and the air screw adjusted
Rich jetting:
-Symptoms have always stay the same unless there’s a big change in weather/elevation
-An air screw adjustment makes a noticeable change in symptoms
-Compression is still good
-Feels strong when kicking over
-Compression test shows proper PSI (same as new or within 10%)
Let me know if that helps :)
-Kelley
My bike has a lot of these but I was thinking carburetor and it is running rich because it has a lot of spooge and the top end was supposed to have just been redone. It does idle good and doesn't foul out spark plugs it just gets covered in black mess until it won't fire until I wipe it off after a bit usually idling too long though. I did also notice the needle valve has no spring where the float goes up on it. I hope I didn't get ripped off.
Hey David, it does sound like it might just be running to rich. If the float needle is worn out, that might be causing the float height to be too high and making the mixture rich across the board.
I made another video recently on properly adjusting and measuring the float height.
Float height doesn't make that much sense to me because of the orientation of the carb
Not sure which is up or down regarding float because of that hence making it difficult for me to understand "too high or low"
Should I reference up or down according to how the bowl sits when installed
I also did bend the tab trying to lift the float and made it far worse to where it just keeps dying initially after starting so I probably went the wrong way but the float didn't seem to move much even though I bent the tab quite a bit up (or down since I'm not sure which way is which)
I'm afraid I may have ruined the float metal portion.
I'll check it out that video again. Seems like an easy thing but not when you've never done it and these carbs are so touchy