dom77 Posted June 29, 2017 Share Posted June 29, 2017 im havin issues changing my sprocket... while trying to reach 80nm of torque on the 6 nuts of the rear sprocket seems like the bolt is turning underneath so when i tighten the nut its like if it is no longer tightening (sorry not sure im very clear). has anyone run into this issue? Link to comment Share on other sites More sharing options...
dom77 Posted June 29, 2017 Author Share Posted June 29, 2017 looks like i stripped the threading... the 6 nuts wont even come off now Link to comment Share on other sites More sharing options...
koth442 Posted June 29, 2017 Share Posted June 29, 2017 Don't panic... yet. I haven't taken the FJ sprocket off, but if its like my other bikes then the bolt will have a shoulder. The shoulder rests up against the backside of the sprocket carrier. If the bolt gets out of position, you may have a 'stripped' like sensation. So look carefully at the backside of your sprocket carrier at the bolts. '15 FJ09 Link to comment Share on other sites More sharing options...
dom77 Posted June 29, 2017 Author Share Posted June 29, 2017 on the backside there nothing to prevent the bolt from turning (my sv had that if i recall). i sent it to the mechanic... ill post the result if it can help others when they do theirs Link to comment Share on other sites More sharing options...
koth442 Posted June 29, 2017 Share Posted June 29, 2017 Yea, the SV is the bike I'm picturing. Can you post a picture of the backside of the sprocket here? '15 FJ09 Link to comment Share on other sites More sharing options...
dom77 Posted June 30, 2017 Author Share Posted June 30, 2017 i brought the part to the mechanic so right now i cant. i will though as soon as i get it back. Link to comment Share on other sites More sharing options...
vacavillefj09 Posted August 16, 2017 Share Posted August 16, 2017 I just tried to change my chain and sprockets and ran into the same issue on the rear sprocket nuts. Did yours stripped? Link to comment Share on other sites More sharing options...
pattonme Posted August 16, 2017 Share Posted August 16, 2017 hold on a sec. 80N/m? As in 60 ft/lb? You can't be serious. I wouldn't go higher than 44 ft/lb (common Suzuki spec) and frankly anything over 35 should be quite sufficient. The bolt is in sheer and tightness isn't actually all that important - provided the sprocket isn't wobbling about. By comparison brake caliper bolts (radial or conventional) are generally around 25-30 ft/lb and they are subject to all kinds of bending moments. If something looks wrong (and just insane values are all over the manual) then check alternate sources. This one will give you an idea as to what it should be: http://www.dansmc.com/torque_chart.htm Link to comment Share on other sites More sharing options...
koth442 Posted August 16, 2017 Share Posted August 16, 2017 http://www.dansmc.com/torque_chart.htm That's a great link. Thanks! '15 FJ09 Link to comment Share on other sites More sharing options...
Premium Member superfist Posted August 16, 2017 Premium Member Share Posted August 16, 2017 Yeah, I noticed it's also listed on the common torque values thread on this forum: Here I was looking up torque for the rear axle nut and that one popped out as way too high for those tiny nuts. These values also come from the service manual and state to increase torque in stages using a criss-cross pattern. Possibly another misprint in the service manual? Link to comment Share on other sites More sharing options...
vacavillefj09 Posted August 17, 2017 Share Posted August 17, 2017 So i just took my sprocket off and three of the nuts did come off and the rest pulled the studs out. Looks like i only stripped the upper part of the stud and the nuts so i will be replacing all studs and nuts just to be safe and i will definitely not do that again!... knock on wood Link to comment Share on other sites More sharing options...
skipperT Posted August 17, 2017 Share Posted August 17, 2017 They WILL take the proper torque if REPLACED. Those nuts are one time use. If you reuse them, then you won't usually get to the factory torque spec. BTDT. -Skip Link to comment Share on other sites More sharing options...
vacavillefj09 Posted August 17, 2017 Share Posted August 17, 2017 Thanks Skip! Does that amount of torque sound right to you? Im trying to avoid buying the repair manual, but i guess it wouldn't be a bad idea to have it on hand.. Link to comment Share on other sites More sharing options...
skipperT Posted August 17, 2017 Share Posted August 17, 2017 You're welcome! My copy of the manual says 80 NM or 58 ft/lbs. HTH, -S Link to comment Share on other sites More sharing options...
aeg Posted August 17, 2017 Share Posted August 17, 2017 I watched many track junkies, amateur racers and a very reputable mechanics casually tighting the rear axle nut by hand with a much lower torque when swapping tires/wheels. No one lost a tire so far. The tech I trust actually stated the specs are off the wall on the torque numbers. Link to comment Share on other sites More sharing options...
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