recently got lt 80 ported polished and clutches done the thing runs great on the level but we run xc the terian is rough and steep when comes to hillls machine boggs down and sometimes stalls.replaced the carb problem still there .does this sound like clutch problem or something else comp good and cleaned carb a billion times still dont run up hills without good start.cleaned clutches as well am at my witts end as well as my son he runs 2 every weekend till it comes to the hills and then the bike falls on its face any help or sugg.have tried to contact the engine builder with no luck any body have any suggestions thanks.son weighs 80 pounds if that helps at all.

 

If it does it only on inclines, it sounds like a float problem? Perhaps the carb only functions ideally on level ground. I don't know, just taking a guess.

 

Is this an "LT80" motor job?