Wurring sound? from trans or final drive?

[GregT]

Allen head screw again, why not a cap screw?

Very strong. I could get one readily where a 14mm hex head high tensile screw was harder to get. Memory says the shank size was an accurate 14mm too which is required. Don't think the hex head screws are that accurate.
Tightened with a long piece of tube slipped over the allen key.

If a hex head is easier for you, fair enough.

 

[bwringer]

Allen head screw again, why not a cap screw?

From the photos I've seen of this repair, there's no room for a socket.

Grade 12.9 socket head screws are fairly easily available.

 

[Buffalo Bill]

The shaft has to come out to go in a lathe. With the nut broken off the end it all just slides apart. So watch you don't drop parts or lose the sequence of shims etc.
The new screw up the center will do what the nut did and hold it all together. i used a socket head high tensile allen screw, drilled and lockwired after tightening.

Ok Greg how did you lockwire it? Some kind of solid lock would be mo-betta.

 

[GregT]

Ok Greg how did you lockwire it? Some kind of solid lock would be mo-betta.

Just drilled the socket head and looped around a leg of the u-joint from memory.
Loctited - and done up with a long tube over the allen key. I'd probably use the rattle gun now.

 

[Buffalo Bill]

Here's the linc to Dave's thread-2017: https://www.thegsresources.com/_for...-drive-indepth-experience&highlight=secondary

 

[Buffalo Bill]

Just some GS tech trivia for anybody interested:
Have not been interested is doing the chore of fixing my GS this summer, chose to ride my other bike with my limited free time instead.
Ordered a salvage set of 850cc bevel gears last week, but bummer, forgot to check the part numbers before I did. Just assumed they would all be the same.
Found out almost all the part numbers for the 2ndary and final drive are identical, accept the 2ndary bevel gears.
Seems the GS shafties set the drive ratio with bevel gear selection.
The 850 torque and HP peaks are 500rpm higher the 1100cc, explains the different bevel gear part numbers.
Do not wanna use a lower final drive ratio in my 1100G.
Dave Redmon has some 1100 bevel gears, I just need to make time and journey up to his domicile.

 

[bwringer]

Good to know, Bill.

Also, there may be differences in the drive flange bolt spacing.

On the 850, I believe the split is in 1982 -- '82+ are different flanges and driveshafts than '79-'81. The driveshaft lengths and splines are the same, so you just need a driveshaft that matches the output on the engine. And yes, I learned this the hard way with a transplanted engine in an 850...

I do not know how or whether this applies to the 1000G/GL and 1100G/GL/GK models, but it's something to watch out for. Caveat shaftor.

 

[Grimly]

The 850 driveshaft flange changed between '79 and '80.
I also found that the hard way.

 

[Buffalo Bill]

The best way is the hard way, anyway seems to be the way I go about my day…

 

[Buffalo Bill]

Ok, need my favorite bike back on the road.
Will be driving up to Dave Redman's house for a bevel gear set this weekend.
Hope it's the right parts.
After I get the broken gear out, I'll see about having the repair done, as a back up in case Dave's set is the wrong part.
Thank you everybody for your help!

 

[Buffalo Bill]

Actually have big-mo going this weekend, accept time out for riding.

 

[Buffalo Bill]

Bummer, as per usual a weird problem showed up. The driven assembly don't wanna pull out of the engine block.
Seems the barrel has some internal friction with the side wall.
I snapped the flange off prying.

 

[Burque73]

Bummer, as per usual a weird problem showed up. The driven assembly don't wanna pull out of the engine block.
Seems the barrel has some internal friction with the side wall.
I snapped the flange off prying.

Jeeze, Bill. Always somethin' ain't it.
Best of luck to ya.

 

[Buffalo Bill]

Jeeze, Bill. Always somethin' ain't it.
Best of luck to ya.

Your post gave me luck. Got a tweak of a movement just with moderate prying. Then with a half hour of work it popped out.
Enough work for Memorial day, will have to follow up later this week.

 

[Grimly]

From what I recall when Redman did his, he loosened the nearest bolt that clamps the case halves together and it allowed enough clearance for the assembly to slide out.

 

[Buffalo Bill]

Drive gear in place and clearance checked with Prussian Blue.
All assembly now, no biggie.

 

[Buffalo Bill]

I thought I would show how I dealt with the weight of the swing arm.
Worked great for me.

 

[Carter Turk]

You gonna wire brush that ground ring in post #56? Like I know anything at all about electrical stuff. Ha ha.

Doing any track days this year?

 

[Buffalo Bill]

You gonna wire brush that ground ring in post #56? Like I know anything at all about electrical stuff. Ha ha.

Doing any track days this year?

I dunno, cost per day is high. To get enough laps and develop skills, takes more than 4 tracks days.
I am blazing up and down all the best country roads near me, playing Irish road racer.
The old G is still a blast to ride that way, I pretend I'm Mike Hailwood.

 

[Buffalo Bill]

Back on the road, did 30 hooligan miles this morning.
Thanks a bunch Redman for giving me the bevel gears!