i had the lifters adjusted at a honda shop awhile back, since i've been smelling burning oil. i check the oil level religiously and every so often it's a quart or more low. it's sporratic. it'll go for months without loosing a drop then all of a sudden it's low. the underside is clean. i looked under the seat and there is oil on the cylinder head and there is oil all over a black rubber-ish tube that goes from the head to the carb. it's about 2 or 3 inches in diameter. has anyone had a similar problem? is there a seal the shop could have screwed up that would cause a leak? i can't take it back, the lifters were adjusted almost a year ago so my chance of having the shop fix it has come and gone.

 

sure its not the crankcase vent going to the airbox? look inside see if there is oil