(98 yamaha FZR 600) One day i was comin off the exit ramp downshifted in order to come to the stoplight. I was at a complete stop and put the bike in first gear. The engine revved as i let go of the clutch but there was no forward movement. i released the clutch to make sure the bike was in gear and nothing happened. the engine remained idle so i shifted up to sixth gear. nothing....the bike remained in neutral!! what could it be? So after some investigating, i found that (1) the chain sprocket was missing the bolt and washer that held it in place, (2) the oil seal on the push rod was missing and (3) there was so much metal dust inside the crank case that its possible that the chain the bolt and oil seal. With that being said, i feel like my clutch wasnt connecting to the push rod and lost complete power. Any suggestions?

SOURCE: One day i was comin

It will not be a bent shift fork. If the clutch lever feels the same pulling the lever in and out as it did before the problem came up then chances are the clutch is okay. Does the lever at the gearbox move properly when the hand lever is moving in and out? Is the clutch cable hanging up on something? I think you are going to find either a broken woodruff key on the gear at the right end of the crankshaft or clutch plates hanging up on the clutch hub. The broken key would prevent power from going to the ring gear on the outer clutch hub. The clutch plates can wear grooves into the clutch inner and or outer hubs. Too deep a groove and the plates can be unable to be compressed by the clutch springs. The result is no power being transmitted through the clutch. Another possibility is a broken shift shaft arm or arm spring. The right engine side cover will need to be removed so you can then do a visual inspection of the crankshaft gear, clutch hub and shift shaft lever. If I knew the year and model and engine size of your Yamaha bike I could offer more exact diagrams. The one below are generic. Go to www.babbittsonline.com and you can see an exploded view of your specific engine. Please rate my answer.

SOURCE: I have a 98 yamaha

This sounds like the clutch has gone out and needs to be replaced, it is very unlikely for the shift fork to get bent on these bikes.