 Brand new sprocket changing tip
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Joined: Jan 2005
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Worn Saddle
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OP
Worn Saddle
Joined: Jan 2005
Posts: 6,308 Likes: 4 |
Ok, got this one from a newbie, but a great idea.
It seems that little Matty was in a big a$$ hurry to get his new sprocket on, so he decided to do it differently then everyone else does. But he may have stumbled upon something good in the process.
He started by removing the sprocket cover, then while holding the rear brake lever down, he loosened the big sprocket nut. Dam, that's easy!
The he just loosened the rear wheel, much looser on the right hand side, then he slid the rear wheel forward about an inch. At that point he just removed the sprocket with the chain still attached to it, he said it slid right off with no problems at all. Then he put the new sprocket on the chain, and slipped the chain/sprocket back on the shaft. Tighten it a bit, slide tire back, hold brake again, tighten big sprocket nut. Readjust and tighten rear wheel.
Sounds like a winner to me. he said it took about 10 minutes to do the job.
I might have to change my destructions now.
A word to the wise is not necessary. It is the stupid ones who need the advice.
Pat
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 7,643
Monkey Butt
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Monkey Butt
Joined: Jan 2005
Posts: 7,643 |
Sounds a good way of doing it, I think I was about 30 minutes last time I did it, but that was at a friends(mechanics) just to make sure I did it properly.
Ray(UK)
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Re: Brand new sprocket changing tip
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Joined: Aug 2005
Posts: 2,726
Loquacious
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Loquacious
Joined: Aug 2005
Posts: 2,726 |
Great idea! I just changed mine and did discover it is easier to leave the chain on and use the brake. BUT, removing the sprocket (and installing) with the chain attached would have been even easier and require much less adjustment change on the rear wheel.
Bob
2005 America, 904cc - sold. 2014 Trophy SE.
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 12,877
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,877 |
So the only difference really is using the brake/chain instead of a block of wood?
Benny
Black & Silver '02
Too many mods to list
Not enough miles ridden
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 11,126 Likes: 13
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 11,126 Likes: 13 |
July 28th 2005: 
Blowing gravel off rural roads
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 2,200 Likes: 1
Oil Expert
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Oil Expert
Joined: Jan 2005
Posts: 2,200 Likes: 1 |
Quote:
July 28th 2005:
What, no picture?
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Re: Brand new sprocket changing tip
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Joined: Aug 2005
Posts: 2,726
Loquacious
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Loquacious
Joined: Aug 2005
Posts: 2,726 |
Benny, it's more than that. By loosening the sprocket and removing WITH the chain ON the sprocket is much faster and requires less chain slack. Even putting back on the "new" sprocket with the chain already fitted on the sprocket would be much easier as well.
Bob
2005 America, 904cc - sold. 2014 Trophy SE.
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 9,223
Big Bore
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Big Bore
Joined: Jan 2005
Posts: 9,223 |
"Never underestimate the power of human stupidity" - Robert Heinlein
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 5,537
Check Pants
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Check Pants
Joined: Jan 2005
Posts: 5,537 |
That's actually a good tip, thanks. I just had my sprocket off for the seal. Not thinking, I removed the rear wheel, first which was getting a new tire. Made breaking that sprocket nut loose a whole lot toughter.
Worst part was getting the rear axle back by myself, that took some serious swearing and about 30 minutes. No one is ever around when you need help.
I did borrow a 36 mm socket this time and actually torqued that thing back in place. Last time, all I had was a large adjustable wrench, which actually worked fine. I'm pretty good at guessing 100 ft-lbs. (actually just under that)
Al
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 2,664
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 2,664 |
hi moe,
that's how i've done it too, but didn't post it.
Ride Safe,
Dennis
Triumph, it's how I live and what I ride.
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 6,821
Bar Shake
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Bar Shake
Joined: Jan 2005
Posts: 6,821 |
Quote:
hi moe,
that's how i've done it too, but didn't post it.
Ditto, as an old time flat-rater, I didn't give it any thought 
Contra todo mal, mezcal; contra todo bien, también
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,753 |
wow that makes things seem a lot easier. so simple and seems almost obvious. good tip
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 11,126 Likes: 13
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 11,126 Likes: 13 |
Quote:
What, no picture?
Ha!
Shaun,
Notice the chain is on a nutless front sprocket. Picture of worn sprocket and chain taken during first chain kit install, February 19, 2004.
Edited to delete reference to certain TN event...
Last edited by moe; 01/30/2006 10:30 AM.
Blowing gravel off rural roads
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 Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 2,200 Likes: 1
Oil Expert
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Oil Expert
Joined: Jan 2005
Posts: 2,200 Likes: 1 |
Quote:
Picture of worn sprocket and chain taken during first chain kit install, February 19, 2004.
And I bet you still have the component parts on your garage wall as well!
Quote:
Edited to delete reference to certain TN event...
and what would that be? 
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 150
Adjunct
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Adjunct
Joined: Jan 2005
Posts: 150 |
I used the break leaver trick myself the other week when i done my first chain and sprocket swap, 39000km not too bad i thought, but i had to remove the back wheel to swap out the cush drive rubbers, also changed front sprocket to 18 tooth, man what a differance 
Phil
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Bleweyzarsoff on the TBA
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 11,126 Likes: 13
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 11,126 Likes: 13 |
Quote:
And I bet you still have the component parts on your garage wall as well!
I DO! cept for the chain(s) I tossed those. But I do have both front sprockets and both rear sprockets. I think I might even have the washers too. 
Quote:
Edited to delete reference to certain TN event...
and what would that be?
I have no idea!
Blowing gravel off rural roads
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 5,537
Check Pants
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Check Pants
Joined: Jan 2005
Posts: 5,537 |
Quote:
....but i had to remove the back wheel to swap out the cush drive rubbers, also changed front sprocket to 18 tooth, man what a differance
Why did you swap out the cush drive rubbers?
Al
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 11,126 Likes: 13
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 11,126 Likes: 13 |
They wore out would be my guess. Whats up with these cush drive rubbers He also may be replacing his with a Tbird sport cush drive.
Blowing gravel off rural roads
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 3,734
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,734 |
My cush drive rubber finally gave up after 30,000 or so miles. Your cush drive should have no play in it at all. Seems to me if it does, it could lead to premature chain and sprocket wear.
I wonder though why a few bikes have quick cush drive rubber wear? Is it because the chain has too much play, or maybe too tight? Or maybe it's the composition of the rubber breaking down prematurely?
If you ever change it, I recommend the TBird rubber. Gives a slightly tighter fit than the stock one.
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 5,537
Check Pants
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Check Pants
Joined: Jan 2005
Posts: 5,537 |
Quote:
My cush drive rubber finally gave up after 30,000 or so miles. Your cush drive should have no play in it at all. ......
I have not an inkling about anything related to the cush drive. Mine was just out when my rear tire was mounted. They fit snugly on the mounts, is there a way to test for free play?
Al
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 3,734
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,734 |
Take a rag and use it to grip the sprocket...say the 4 or 5 o'clock positon. Try to turn the sprocket by rolling it forward and back. If it has any play, your cush drive rubbers are probably worn.
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 150
Adjunct
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Adjunct
Joined: Jan 2005
Posts: 150 |
Quote:
Why did you swap out the cush drive rubbers?
My cush drive rubbers were worn, had about half inch of play in them 
Phil
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Bleweyzarsoff on the TBA
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 5,537
Check Pants
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Check Pants
Joined: Jan 2005
Posts: 5,537 |
Quote:
Take a rag and use it to grip the sprocket...say the 4 or 5 o'clock positon. Try to turn the sprocket by rolling it forward and back. If it has any play, your cush drive rubbers are probably worn.
Thanks, thats a new one for me, I'll check next time the tire is off. I installed my rear tire Saturday, solo, boy that was pretty challenging!
Al
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 9,223
Big Bore
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Big Bore
Joined: Jan 2005
Posts: 9,223 |
You don't need the tire off Al. The play can be checked anytime.
"Never underestimate the power of human stupidity" - Robert Heinlein
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 1,018
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,018 |
Mine has had play in it since day one. Even had it replaced under warrenty at first service. Still had play in it. According to triumph at the time it was with in specss. Never have like it thou. Think I will replace it with tbs unit when time for a new chain....Wonder if the play in them could have been the cause of some folks belt breaking problems...
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 9,223
Big Bore
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Big Bore
Joined: Jan 2005
Posts: 9,223 |
"Never underestimate the power of human stupidity" - Robert Heinlein
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 1,018
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,018 |
You can easily move it a half inch or so in either direction
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 9,223
Big Bore
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Big Bore
Joined: Jan 2005
Posts: 9,223 |
 I don't have the tolerance at hand but half inch sounds WAY too much
"Never underestimate the power of human stupidity" - Robert Heinlein
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 3,734
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,734 |
I asked the tech at my dealer about tolerance for the cush drive rubber and he said to go check a new model on the showroom floor. So I did and it had zero play, just like mine did up until about 30,000 miles.
Now I'm no engineer, but it seems to me that you shouldn't have any play with the cush drive rubber. If you do, when your torque kicks in with a start off the line at say...a stop sign or green light, then your sprocket is going to lurch forward a bit putting pressure on the links in your chain when the sprocket teeth rotate(FWIW, I could feel it slip a little when my cush drive rubber started to get some play in it). IMO that can lead to excessive/premature chain wear, and the same to your sprocket teeth.
So to me it seems like one of those pay me now or pay me later things. You can buy a new cush drive rubber, and get the appropriate life from your chain and sprockets, or you can put it off, which means you'll be changing out all of it sooner.
Of course I could be wrong about all of this...wouldn't be the first time. Any experts out there care to chime in?
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 5,537
Check Pants
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Check Pants
Joined: Jan 2005
Posts: 5,537 |
Quote:
I asked the tech at my dealer about tolerance for the cush drive rubber and he said to go check a new model on the showroom floor. So I did and it had zero play, just like mine did up until about 30,000 miles.
Now I'm no engineer, but it seems to me that you shouldn't have any play with the cush drive rubber. If you do, when your torque kicks in with a start off the line at say...a stop sign or green light, then your sprocket is going to lurch forward a bit putting pressure on the links in your chain when the sprocket teeth rotate(FWIW, I could feel it slip a little when my cush drive rubber started to get some play in it). IMO that can lead to excessive/premature chain wear, and the same to your sprocket teeth.
So to me it seems like one of those pay me now or pay me later things. You can buy a new cush drive rubber, and get the appropriate life from your chain and sprockets, or you can put it off, which means you'll be changing out all of it sooner.
Of course I could be wrong about all of this...wouldn't be the first time. Any experts out there care to chime in?
Interesting, makes sense. What does the replacement cost and a part application if you have one.
Al
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 9,223
Big Bore
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Big Bore
Joined: Jan 2005
Posts: 9,223 |
I am 100% with you Derek. There should be minimal play and the rubber compressing/expanding should be the 'shock' absorber.
"Never underestimate the power of human stupidity" - Robert Heinlein
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 3,734
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,734 |
I put in the cush drive rubber for a Thunderbird after herbz had his done and said it was recommended by his dealer. It costs about $80, and the part number is T2012211. I installed it myself, and it's a more snug fit than the stock cush driver rubber. I've had about 7 nails in my tires over the last 2 1/2 years, so I'm familiar with what a snug stock cush drive rubber is like. 
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 12,877
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,877 |
Happy to chime in as an engineer... Snug is good. When you have play, it gives time for one piece to build momentum before they meet, that's where you get "jerk" which is bad. Big time changes in force. From my experience with hydraulic pumps and electric motors coupleing, the rubber spider in the coupler needs to be snug. The swuish in the rubber itself is what abosorbs the shock.
Benny
Black & Silver '02
Too many mods to list
Not enough miles ridden
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 3,734
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,734 |
I was thinking more about this(yeah I know, that can be dangerous), and it seems to me that a loose/worn cush drive rubber can affect the entire drive train...all the way to the transmission, putting stress on those gears.
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Re: Brand new sprocket changing tip
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Joined: Jan 2005
Posts: 12,877
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,877 |
Exactly. I wouldn't worry about the wheel, plenty of metal and spokes to handle the torque, it's the other stuff that will be a weaker link.
Benny
Black & Silver '02
Too many mods to list
Not enough miles ridden
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