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Will this solution hold my sprocket??? HELP :D

Started by roedvigmads, January 24, 2015, 03:28:07 PM

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roedvigmads

I have a problem with a worn out drive shaft on my Gs500E from 1993.
I have a friend (who is a mechanic), he welded the sprocket on the driveshaft.
This is what we have made (our solution) :)
But the big question is, will this hold the sprocket??
Is it safe to ride my MC, with this solution?? ;)

See picture below. ;)

I look farward to hear your answers :D

[attachment deleted by admin]

Dr.McNinja

#1
Aside from the fact people who weld their sprocket to their driveshaft make me physically ill, the real question is about weld penetration. Is your friend a certified welder? Has he taken any classes? Your picture makes it really hard to see the weld quality. Personally I would not trust it, and if the weld is even a bit spotty, or the wrong material was used for the weld, or anything like that, the torque being applied to the sprocket will likely rip the welds and send your sprocket through your bike.

Replace the driveshaft. Or buy a new engine. GS engines are fairly cheap. Far cheaper than the catastrophic injury payments you'll be making when your sprocket comes undone at 70mph.

ohgood

Quote from: roedvigmads on January 24, 2015, 03:28:07 PM
I have a problem with a worn out drive shaft on my Gs500E from 1993.
I have a friend (who is a mechanic), he welded the sprocket on the driveshaft.
This is what we have made (our solution) :)
But the big question is, will this hold the sprocket??
Is it safe to ride my MC, with this solution?? ;)

See picture below. ;)

I look farward to hear your answers :D

it might hold together.

it might shatter at 30 mph while you're merging into traffic.

it might outlast us all.

I"M not going to ride a bike with a welded sprocket. that's for diggity dang sure.


tt_four: "and believe me, BMW motorcycles are 50% metal, rubber and plastic, and 50% useless

rich3389

Might hold, might not. Definitely sketchy, I wouldn't ride it.

J_Walker

I would say that a weld is stronger then the little pissy cotter pins that hold the sprockets on..

THAT being said. that weld looks like a high school kid using a stick welder... terrible!
-Walker

sledge

Is that a weld or did a pigeon fly over and sh** on it?

No reason why a decent weld shouldn't hold it on indefinitely, the whole bike is welded together, unfortunately that isn't a decent weld.

If the weld looked something like this........



I would be more inclined to trust it.

J_Walker

-Walker

sledge

I agree, but I couldn't find a pic of a circular free-handed weld which is why I said

"If the weld looked something like this".



Suzuki Stevo

#8
Quote from: J_Walker on January 25, 2015, 12:55:37 AMno way that could be freehand.... the circle is just too perfect....

Beilive it, that my friend is a TIG weld, done freehand, I worked at Boeing Marine Systems as a Ship Fitter in the early 80's on the Pegasus-Class Hydrofoils, primarily on the Full Penetration X-Ray welds required for the Propulsion Systems and the Struts and Foils, anyway...I worked with the best of the best and that weld is definitely freehand, unless they taught a robot how to TIG weld? That was more than likely done on a rotating weld positioning table that can rotate at a preset speed, freeing the Weldor to press the rheostat and feed the welding rod/wire. The pool at the top is where the Weldor tailed out or completed the weld.

I Ride: at a speed that allows me to ride again tomorrow AN400K7, 2016 TW200, Boulevard M50, 2018 Indian Scout, 2018 Indian Chieftain Classic

Janx101

Cool job! .. understand your described process too. . But is that truly 'Freehand' ?.. rotating table provides assist. .. I took freehand to mean just point and shoot. . Lol... either way it is a sexy bit of welding!

ace50

Quote from: roedvigmads on January 24, 2015, 03:28:07 PM
I have a problem with a worn out drive shaft on my Gs500E from 1993.
I have a friend (who is a mechanic), he welded the sprocket on the driveshaft.
But the big question is, will this hold the sprocket??
Is it safe to ride my MC, with this solution?? ;
Crappy pic, but it looks like he welded a bar on the shaft, not sprocket to shaft. That would have been a no-no.
It might hold, depends on the weld. It's up to you to make that call.

eco.usa

I would try it.  But I would not do any jack rabbit starts.

Leadberry

I would try real hard to pry that welded bit off with a long flathead and see if it holds. As others have said, that weld looks absolutely terrible.

FYI, because it seems you didn't catch it, the guy who was praising the weld was clearly being sarcastic...

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