Need help identifying a part

[Achillessv]

Hello, I do not if my bike is done for, but I am trying to see if I can replace this part. My chain slipped off and damaged this piece.

 

[Gary in NJ]

No photo attached. If the chain slipped and didn't chain-saw your foot off, you're ahead of the game. Almost every other part is easily replaceable (the center case halves are not easily replaceable). Did the chain "slip" off the sprockets, or did it snap...or did the counter-shaft sprocket back-off from the main shaft?

 

[Achillessv]

No photo attached. If the chain slipped and didn't chain-saw your foot off, you're ahead of the game. Almost every other part is easily replaceable (the center case halves are not easily replaceable). Did the chain "slip" off the sprockets, or did it snap...or did the counter-shaft sprocket back-off from the main shaft?

 

[Achillessv]

I think It messed up the crankshaft cover or something I'm having problems identify it

 

[Achillessv]

View attachment 73904

Do you have an email? I'm trying to upload the pictures but they are too big

 

[Ohendo]

Yikes. To my eye that looks like part of the engine casing itself. Image below of an 'intact' case.

 

[Gary in NJ]

OK, a few things here.

The item circled and labeled as "1" is a problem. It appears to be a hole in the main case. As Ohendo points out, it's the chain guard....but the guard is part of the case. You "may" be able to fill this with epoxy putty, but that depends on what the item under that cover is...I would need better photos. It's not looking good.

Item #2 is the root cause of the problem; your counter-shaft sprocket looks like a big washer. It is well beyond its service life and it should have been replaced thousands of miles ago.

Item #3 is the easy fix - it's the shift linkage. I say easy, but there is a strong possibility that the shaft is now bent and wont engage properly.

 

[Achillessv]

OK, a few things here.

The item circled and labeled as "1" is a problem. It appears to be a hole in the main case. As Ohendo points out, it's the chain guard....but the guard is part of the case. You "may" be able to fill this with epoxy putty, but that depends on what the item under that cover is...I would need better photos. It's not looking good.

Item #2 is the route cause of the problem; your counter-shaft sprocket looks like a big washer. It is well beyond its service life and it should have been replaced thousands of miles ago.

Item #3 is the easy fix - it's the shift linkage. I say easy, but there is a strong possibility that the shaft is now bent and wont engage the properly.

View attachment 73908

I have better pictures, site just says it's too big

 

[trepetti]

Ouch. Gary nailed it. The tooth-less front sprocket let the chain fling off, colliding with the engine case and making a big hole. Just some advice. Certain maintenance tasks, if left undone, can be deadly. Brakes, chain, steering head. I am hoping that the condition of the chain is not an indication of overall maintenance.

Whether you repair this bike or get another, please make sure that you are taking care of the regular maintenance tasks.

 

[TownsendsFJR1300]

Plus 1 to all the above.

That hole in the crankcase (I blew the pic up larger) supports part of the transmission. You may get by with some sort of epoxy, etc but that case is SEVERLY DAMAGED. If there's enough support there, to keep that transmission shaft from moving, you might get by. New cases would be the correct way to repair it.

If the shifter shaft is bent, that's not bad to repair( see below).




Part #14 is the bearing (I believe) that's showing under your broken case:

 

[Gary in NJ]

I've looked at the exploded view of this. It does appear that you have a hole in the upper half of the case - the worst possible outcome. If this was a bike in very good condition I'd attempt a repair or even a replacement engine. But as Trepetti has pointed out, if the sprocket (and road rash on the stator case) is any indication of the way the bike has been maintained, this might be a lost cause. Certainly that sprocket has been skipping and grinding for a long time. Turns out it was the sound of a ticking time bomb.

 

[TownsendsFJR1300]

Shifter shaft (part #9):

 

[meadeam]

I don't think I've ever seen a sprocket so worn. I can't believe it would even propel the bike forward in that condition.