kawasaki kx80 problems

[kyle_3600]

Hi, i recently pu a new top end on my 1998 kawasaki kx80 but i bored it out to 100.It has been running good and strong but last time i rode it would make a funny noise like bogging almost but not quite and it would just slow down and lose power and this has been bugging me for quite a while now can someone please help me fast!!!

 

[headshot347]

I'm havin similar problems with my KX85 had same problems loss of power, weird noise and stuff like that and now the pistion is seized, crank case needs to be replaced, new top end, and all of this other crap i have to do. i think that there is something wrong with ur pistion and or top end.

 

[82'yz100]

im having the same problem on my cr80.i put a bore on to a 90.its the jetting in the carb.

 

[kyle_3600]

does anyone know what jetting i should go to then?