yz 250 issues

[likkjedyre]

hi i wonder why my bike destroys all spark pluggs i buy !

i have heard that if the nozzle is to big or smal it will destroy the pluggs

i drove on b8eg thats the plug a yz 250 is supose to run on but it was destroyed to0!:s

plz help :P

[yzernie]

Originally Posted by likkjedyre

hi i wonder why my bike destroys all spark pluggs i buy !

i have heard that if the nozzle is to big or smal it will destroy the pluggs

i drove on b8eg thats the plug a yz 250 is supose to run on but it was destroyed to0!:s

plz help :P

HUH??...

[likkjedyre]

every spark plugg are getting destroyed when i drive and i wonder why that's happening? i have driven on ngk b8eg and that is the plug that is recomend for yz 250.

wath can be the problem with the bike ?

thnx for sulutions ! :P

[AJ_YFZ]

Fouled????

[likkjedyre]

yes ! finaly the word i was looking for

not so good in english:P

[MotoMan]

Most of the time a fouled plug is caused by improper jetting. I would start there.

When you pull the plug out, what does it look like? Is it white, Black, or greyish in color?

[MXtras]

Whew. I am glad we finally got the terminology right. I was envisioning complete destruction.

Motoman is right - jetting is your likely problem.

Low compression (from a worn cylinder, piston or ring) is another possibility. Low compression will make a bike run rich - even if the jetting was right when the engine was new.

Scott

[rockstar9]

I have a 1994 and it sat for 9 months. its running really rich and when i get into 1st and 2nd gear is bogs out. Also when i ride it for 5 to 10 min it will cut out and wont start again. It almost seems like it is fluded. can anyone help me with these problems?