07-15-2016, 11:16 AM | #1 |
Join Date: Mar 2016
Location: Gurnee, Illinois
Posts: 277
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I sheared more sprocket bolts...
So I replaced the stock sprocket bolts with Honda ones, hoping I wouldnt have to worry about the little buggers anymore.
Now, instead of the stud shearing off into the hub, the nuts are popping the threads off just above the sprocket. I cant seem to find out how its doing this. I installed the posts with locknuts, it doesnt seem like they loosened, just popped the threads right off of there. Any suggestions for some other sprocket studs? Not sure what to try next... Thanks guys. |
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07-15-2016, 11:43 AM | #2 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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That's really strange. You running nitrous? ;-)
One would think that with the c-clip plus nuts, it would stay put. What torque spec did you use?
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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07-15-2016, 11:50 AM | #3 |
Join Date: Dec 2015
Location: CO
Posts: 1,525
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That's my question too... How many ft lbs did you do?
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"Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P. |
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07-15-2016, 11:53 AM | #4 | |
Join Date: Mar 2016
Location: Gurnee, Illinois
Posts: 277
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Quote:
Its very odd, because the way it broke the sprocket is still driven. The threads still protrude into the sprocket. I did 20ft-lbs. I checked them after 20 miles and 100 miles and they were still snug. Now about ~800 miles later that's how they sit. Only one locknut still on. I ordered some of the "high tensile strength" ones for taobao, I guess we will see how those work. These stupid things are hard to find at a reasonable price. |
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07-15-2016, 12:04 PM | #5 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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You're going to need to re-jet to take away some power.
I suspect that 20 ft/lbs is a little high. Assuming it's around 5/16" and about Grade 5, the spec would be closer to 13.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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07-15-2016, 12:06 PM | #6 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Did you change the bushings as well? Perhaps Honda bushings would be a good plan.
Also, red Loctite might be better than high torque on the fasteners.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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07-15-2016, 12:07 PM | #7 | |
Join Date: Mar 2016
Location: Gurnee, Illinois
Posts: 277
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Quote:
Another thing I noticed when installing these studs is that they were smaller than the originals. You can see in the picture the larger hole where the original size wouldve fit. The sprocket has two sets of holes, so if I can find the correct size hopefully it'll stay together. |
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07-15-2016, 12:09 PM | #8 |
Join Date: Dec 2015
Location: CO
Posts: 1,525
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Maybe go to the lower end of the "Sprocket Torque Specs", 18 - 28 Nm (13 - 20 ft lbs)
Might try going with 13 - 15 ft lbs of torque to hold those bad boys in place without breaking them
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"Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P. |
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07-15-2016, 12:09 PM | #9 | |
Join Date: Mar 2016
Location: Gurnee, Illinois
Posts: 277
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Quote:
Ill do that next time, im planning on locknut with lock washer with red loctite. @ 13-15 ft lbs. lol |
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07-15-2016, 12:17 PM | #10 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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This is all good to know since I ordered a new sprocket this morning! :-)
__________________
"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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07-15-2016, 01:00 PM | #11 | |
Join Date: Mar 2016
Location: Gurnee, Illinois
Posts: 277
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Quote:
I also dont ride my bike very nice. I wheelie it alot, jump it higher than its supposed to, hit the rev limiter every once in awhile, hard(fast) trail riding, etc. Im happy for the most part with how its held up. The fuel tank still has me ticked though. |
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07-15-2016, 01:29 PM | #12 | |
Join Date: Jun 2016
Location: akwesasne, NY-13655
Posts: 2,220
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07-15-2016, 01:41 PM | #13 | |
Join Date: Mar 2016
Location: Gurnee, Illinois
Posts: 277
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Quote:
http://www.chinariders.net/showthread.php?t=16797 It seems to be a specialty part... is there a common replacement? |
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07-15-2016, 02:22 PM | #14 | |
Join Date: Jun 2016
Location: akwesasne, NY-13655
Posts: 2,220
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07-15-2016, 09:20 PM | #15 | |
Join Date: May 2013
Location: finger lakes NY
Posts: 2,061
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Quote:
my 2 cents... this is why they are shearing....wheelies... I sheared 3 sets of those wheelieing.... I endes up supermoro conveeting with ninja 250 wheels and a cush hub that doesn't use stipud little pins.... I forget where I got em but I found some hardesned larger diameter pins somewhere... fit the big holes in the sprocket... didn't have issues with that.... |
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