Been looking at this topic and have started wondering if this has anything to do with my bike stalling.I have got to thinking that my bike has got harder to kick over than when it was new.It is about ten months old and i have nether checked the valves,does anyone think this could be a problem with the valves.Although the bike is hard to kick over it start first kick usually.

if there was a problem with valves -loose it will rattle,if kick start went down easy and a job to start they will be to tight.so if kick start was hard to push down and it starts first kick its not a problem with valves,so your leg getting weak is poss the problem.

Agree. It

Cheers guys, i'll work on the bike and go to the gym.