2002 YZ426F problems

[motocrosser316]

Alright I may have a serious problem on my hands. I changed the plug on my 2002 YZ426F the other day and after I pulled the plug out I pushed the kick start down and tried covering the hole with my finger seeing if the bike still had compression forgetting the holes so far down ?. So anyhow I put the plug back in and got it all put back together and tried kicking it and it had no compression. I also noticed that the decompression lever didn't have any resistance to it like the valve with stuck, so I took the plug out and put everything back together; I noticed the decompression lever had resistance to it again so I'm guessing the valve got stuck somehow, but have no idea. I know its probably time for a new bike but would rather stay with the 426. I also thougth that I may need new rings or adjust the valves. any advice would be helpful thanks

[DeeCee]

Have you started an run the bike since you experienced this problem ? If yes, how did it run. If it ran OK chances are you just have a sticky decompression problem (possibly cable related).

[pevan99]

Do your self a favor and change the exhaust cam with the new auto decomprssion cam it's the best this I did to my 426

[pevan99]

Does anybody know what rear sprocket to use on my 02 yz426 to reduce the torque?

[MotoPhotog]

Does anybody know what rear sprocket to use on my 02 yz426 to reduce the torque?

Pevan, not sure what kind of riding you did. But I went down 1 tooth in the front, so that 1st gear was more friendly on the clutch, and in the slow stuff. What a difference!? I did notice though, that the previous owner actually had +1 in the rear already.