[autumn]

03 R6 here

I was riding down the highway going about 50 and all of a sudden, I'm coasting. No throttle power. Switching between gears, yet nothing happens. The engine is still running fine. The clutch has the same amount of tension. It's as if the bike is permanently in neutral. I pulled over to the side and had it towed back to my house.

What do you think could be the issue here? Is this an expensive fix?

Thanks! :surprise:

 

[autumn]

No ideas?

 

[The Evil Twin]

There is so much it could be from what little information you give. Unless you notice that your chain is missing, probably should take it to the shop.

 

[autumn]

There is so much it could be from what little information you give. Unless you notice that your chain is missing, probably should take it to the shop.

Chain still there. What more information do you need?

 

[Hercules Zanzibar!!!]

Does "no throttle power" mean the engine doesn't rev?

Does "switching between gears" mean the gears "click" (or "clunk" as the case might be) into place just fine? Is shift lever movement as it should be?

What is the neutral light telling you when the bike's [supposed to be] in gear?

 

[autumn]

Does "no throttle power" mean the engine doesn't rev?

Does "switching between gears" mean the gears "click" (or "clunk" as the case might be) into place just fine? Is shift lever movement as it should be?

What is the neutral light telling you when the bike's [supposed to be] in gear?

No, the engine revs fine. The bike just doesn't roll.

The neutral light indicates that the bike is not in neutral.

The shift lever movement is fine and the gears click, everything goes as usual except the bike doesn't move.

 

[8Ball]

Your front sprocket nut fell off

 

[autumn]

Your front sprocket nut fell off

seems like a possibility based off of google searches. I looked and there's this black plastic plate thing covering mine over the front part of the chain. seems to be a long hole where the nut would be. take a look (pic uploaded sideways gear shifter is right side)

 

[Phrozen]

seems like a possibility based off of google searches. I looked and there's this black plastic plate thing covering mine over the front part of the chain. seems to be a long hole where the nut would be. take a look (pic uploaded sideways gear shifter is right side)

Really, that is the swingarm pivot bolt. I was going to tell you where the actual cover is but you need to take it to someone that has some mechanical skill like a shop

 

[8Ball]

Take your VIN # to the dealer. Have them look it up. There was a service advisory for the nut. If yours hasn't been replaced, they will replace it for free. there is a chance....actually a very good possibility.....that the threads are damaged on the shaft. If that is the case, then the transmission shaft should be replaced. Yamaha corporate has picked up the cost for some people...even recently.... Because this is a known safety issue. You have to push them, and actually talk to the corporate customer service, but they know it was an issue, and they didn't notify the customers. But if you try to weld the sprocket on or try some other backyard mechanic fix, they will tell you to pound sand

 

[autumn]

Take your VIN # to the dealer. Have them look it up. There was a service advisory for the nut. If yours hasn't been replaced, they will replace it for free. there is a chance....actually a very good possibility.....that the threads are damaged on the shaft. If that is the case, then the transmission shaft should be replaced. Yamaha corporate has picked up the cost for some people...even recently.... Because this is a known safety issue. You have to push them, and actually talk to the corporate customer service, but they know it was an issue, and they didn't notify the customers. But if you try to weld the sprocket on or try some other backyard mechanic fix, they will tell you to pound sand

So what am I looking at here in the picture... is the bolt actually missing? And is that actually the culprit to the problem?

 

[8Ball]

The nut is behind the plastic cover that is on the left of your picture. It isn't visible without removing the cover.

 

[autumn]

The nut is behind the plastic cover that is on the left of your picture. It isn't visible without removing the cover.

So your guess is if I remove the cover, that nut is gonna be missing

 

[8Ball]

Yes. And don't try running it before you check. If the sprocket nut has come off, then the sprocket will be sitting on the threads, and will damage them.

 

[autumn]

Alright. Is the plate easy to get off first?

 

[8Ball]

What plate? That's the frame! You'll probably need to take off the lower fairing, and the coolant reservoir....and probably disconnect the shift rod (mark it on the shaft so you put it back in the same position).. Then there are four small Allen screws and the cover is off.

I am afraid Phrozen's advice is probably best. You need to take it to someone with some mechanical knowledge, or at least have them with you to help out....

 

[autumn]

As long as the transmission doesn't need to be rebuilt... right

 

[8Ball]

Read my first response. There is a good possibility that the threads are damaged and the transmission shaft will need to be replaced. This is an issue that Yamaha should take care of, but if you mess around with it any more than taking the cover off, you will give them every reason to deny you. As it is, you will probably need to be a thorn in their side for them to take care of anything more than replacing the nut, but they will because they know they have a known safety issue that they didn't inform the customers about correctly. Your best bet is to let the dealer take care of it. That way if they only put a new nut on, and don't inspect the threads, it's on them.

 

[Freddyg.1234]

03 R6 here

I was riding down the highway going about 50 and all of a sudden, I'm coasting. No throttle power. Switching between gears, yet nothing happens. The engine is still running fine. The clutch has the same amount of tension. It's as if the bike is permanently in neutral. I pulled over to the side and had it towed back to my house.

What do you think could be the issue here? Is this an expensive fix?

Thanks! :surprise:

ever fixed the problem?

 

[Freddyg.1234]

03 R6 here

I was riding down the highway going about 50 and all of a sudden, I'm coasting. No throttle power. Switching between gears, yet nothing happens. The engine is still running fine. The clutch has the same amount of tension. It's as if the bike is permanently in neutral. I pulled over to the side and had it towed back to my house.

What do you think could be the issue here? Is this an expensive fix?

Thanks! :surprise:

ever fixed the problem?