Went riding Saturday June 9 with 2 2001 Yamaha WR426's. To start off the first WR426 started on the 3rd kick, ok doing good but the second WR426 would not start for about what seemed like about 1/2 hour or 3 dozen kicks. Ok he's pooped before we even start riding. We get it started head out on the trail in Georgetown, Ca. (Mace Mill) about 5 min. into the ride we stop to gather all the riders 6 of us. Well the 2nd WR426 wouldn't start again. Took about a dozen kicks and would not fire, ended up bump starting it down the hill. The 1st WR426 was waiting for us down the trail and when we got there he could not start his bike. Down the trail the 2nd WR426 fell and got up and took off and I waited for the 1st WR426, he coasted down to me on the trail and still could not start his bike. I took off down the hill to the bottom with all the other. Was waiting for what like felt for ever. Went back up the hill and he was on the trail kicking and kicking and kicking, can go on for a long time but he was really getting frustrated and I have never saw that side of him. He is an easygoing guy. He could not get it started and it would not bump start either. He ended up coasting all the way down to the bottom of the hill where everyone was waiting. He could not get it started at the bottom before he was pretty pooped so the 2nd WR426 guy hopped on and it toke him about 6-8 kicks to get it started. Our riding party was the 2 2001 Yamaha WR426's my 2001 KTM 520 EXC a 2000 or 2001 Honda XR400 a 2001 Kaw KLR 300 and a 1996 Honda CR250. The Yamaha's were the only bikes having problems starting. I lost count how many time those 2 bikes were kicked and I can honestly say that watching all that kicking made me tired.