Kx 80

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 23, 2008

• #1

I was riding up a hill got 3/4 of the way up and it started making a loud popping noise and cut off. Tried to kick start it and would'nt start. Then i tried to pop the clutch but didn't start so i pushed it home and changed plug and checked compression and cleaned air filter changed oil and sprayed starting fluid in it and tried to start it but still wouldn't start. I'm confused if it has spark and gas shouln't it start. Any help is appreciated

 

G

griffbones

Member

Sep 12, 2006

329

1

• Feb 23, 2008

• #2

How many pounds of compression does it have, maybe you toasted the top end.

 

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 23, 2008

• Thread starter
• #3

Not Sure. When the spark plug was out i stuck my finger in the hole and pushed kick starter down and could feel the air coming out.

 

T

thejake456

Member

Sep 24, 2007

219

0

• Feb 23, 2008

• #4

that is normal

 

G

griffbones

Member

Sep 12, 2006

329

1

• Feb 23, 2008

• #5

That is NOT a compression test. Go buy a $25 tester at the auto parts store and see what you really have. If the bike has lost most of the compression, then it's not going to want to start. Your other option is to take the top end off and check it out. The fact that the bike quit under a heavy load really makes me think that you might have damaged the top end.

 

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 23, 2008

• Thread starter
• #6

K thanks

 

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 23, 2008

• Thread starter
• #7

does anyone know how much compression it should have

 

A

AwfulSmokey

Member

Oct 15, 2007

55

0

• Feb 23, 2008

• #8

You should also check your float. Improper float height on a hill can cause problems. It's possible, although not likely that your float got stuck.

 

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 23, 2008

• Thread starter
• #9

thanks

 

G

griffbones

Member

Sep 12, 2006

329

1

• Feb 23, 2008

• #10

The factory specs say 119 to 185 is the useable compression range. Realistically you should see 150 to 165 if the top end is in good shape.

 

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 23, 2008

• Thread starter
• #11

thanks

 

J

jschiller

Member

Mar 5, 2007

61

0

• Feb 23, 2008

• #12

Hhhhmmm! popping noise! also check your timing, if the woodruf key on the magneto broke it will make popping noises.

 

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 26, 2008

• Thread starter
• #13

Tested compression and it was an amazingly low 27

 

S

SHSPVR

Member

Oct 24, 2006

200

0

• Feb 26, 2008

• #14

motocross3 pull the top end off
With a PSI of only 27 that is not going work.

 

M

motocross3

Member

Jan 30, 2008

56

0

• Feb 27, 2008

• Thread starter
• #15

thanks ill try that