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.
http://i.imgur.com/aVhPuzOh.jpg 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. |
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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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. |
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. |
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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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. |
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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Ill do that next time, im planning on locknut with lock washer with red loctite. :D @ 13-15 ft lbs. lol |
This is all good to know since I ordered a new sprocket this morning! :-)
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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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http://www.chinariders.net/showthread.php?t=16797 It seems to be a specialty part... is there a common replacement? |
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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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