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| | | | | Mounting Techniques Every frame is different. Share and ask questions about mounting your motorized bicycle engine kit to your bicycle frame or bicycle rack | How tight should I tighten the sprocket bolts? Discussion at Motorized Bicycle Engine Kit Forum in the Mounting Techniques forum. I used a inch pound torque wrench to be sure I got them all the same tightness, and loctite. For ...  | | 
03-26-2008, 05:36 PM
|  | Moderator | | Join Date: Mar 2008 Location: Tucson,Arizona
Posts: 2,185
| | Re: How tight should I tighten the sprocket bolts? I used a inch pound torque wrench to be sure I got them all the same tightness, and loctite. For the life of me I cant remember what I tighten them too  Do not use a ft. pound torque wrench or you will tighten them too tight. | 
03-26-2008, 06:30 PM
|  | Genius Visionary | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,381
| | Re: How tight should I tighten the sprocket bolts? I said to use the wrong torque setting here.....I change the post.
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Last edited by Bikeguy Joe : 04-03-2008 at 06:43 AM.
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04-02-2008, 09:01 PM
|  | Motorized Bicycle Builder | | Join Date: Mar 2008 Location: Westport, MA
Posts: 45
| | Re: How tight should I tighten the sprocket bolts? Did you mean 12 inch pounds??  | 
04-03-2008, 06:36 AM
|  | Genius Visionary | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,381
| | Re: How tight should I tighten the sprocket bolts? I don't know what I mean...I've ever only used a foot pound wrench.
I have developed a "feel" for bolts and only use a torque wrench when doing something like the heads on autos.
If you are tightening the sprocket bolts, make them "reasonably tight" don't go apesh*t, but make sure they aren't going to come loose.
__________________ If it ain't broke, and you mess with it long enough, it will be.
Last edited by Bikeguy Joe : 04-03-2008 at 06:44 AM.
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04-16-2008, 02:51 PM
|  | Master Motorized Bicycle Builder | | Join Date: Apr 2008 Location: Valparaiso, IN
Posts: 143
| | Re: How tight should I tighten the sprocket bolts? I tightened mine to about 12 ft/lbs (not inch pounds)- but that is working up slowly and with the 9 original bolts replaced with quality bolts. I take a Sharpie and number the bolt holes 1 through 9. then I tighten number 1 down a bit, then 6, then 2, then 7, then 3, then 8, then 4, then 9, then 5, then 1.... Sharpie comes off with laquer thinner. When I get close, say 9 or 10 ft/lbs, I put a straight edge across the sprocket at several places to make sure the sprocket is equidistant from the rim. I then adjust if necessary by tightening where necessary to equal it out.
Oh yeah, one rubber disk outside, one on inside, but my kit came with 2 metal split rings, one made of three pieces with 3 holes in each and one of two pieces, one 4 holes and one 5. I put both of those on the inside, overlaping the joints.
When I took the sprocket off of the old wheel to put it on the new one, the pattern impressed on the rubber showed that the bolts were neatly between the spokes and not resting against them- that is what you want. If you do not tighten them enough to have that happen and have the sprocket stay put, trouble will follow, especially if you are using standard 14 ga spokes.... imho, at least
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04-16-2008, 06:35 PM
|  | Genius Visionary | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,381
| | Re: How tight should I tighten the sprocket bolts? 12 ft.lbs is a little loose. I cranked mine down until they were "reasonably snug"
__________________ If it ain't broke, and you mess with it long enough, it will be. | 
04-24-2008, 11:25 PM
|  | Moderator | | Join Date: Jan 2008 Location: Shelby MI
Posts: 559
| | Re: How tight should I tighten the sprocket bolts? I use almost exactly the same method as HoughMade, although I have never used a torque wrench. I tighten mine down pretty tight with usually 3-4 threads sticking out past the nut. The biggest thing is to keep metal off ot the spokes, I learned this the hard way with seven spokes worn through...Kelly
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04-25-2008, 08:29 PM
|  | Master Motorized Bicycle Builder | | Join Date: Apr 2008 Location: Valparaiso, IN
Posts: 143
| | Re: How tight should I tighten the sprocket bolts? I tried to go to 14 ft/lbs and I broke 3 bolts- not the original soft ones- good quality stainless- I'll stick with 12.
__________________ 29/10ths cubic inches of raw power. | 
04-26-2008, 06:44 AM
|  | Genius Visionary | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,381
| | Re: How tight should I tighten the sprocket bolts? Yeah, but in my experience, stainless snap like pretzels, so do grade 8.
__________________ If it ain't broke, and you mess with it long enough, it will be. | 
05-10-2008, 08:35 AM
| | Master Motorized Bicycle Builder | | Join Date: Mar 2008 Location: Daytona Beach
Posts: 214
| | Re: How tight should I tighten the sprocket bolts? My technique on torquing bolts on the rear sprocket is to count threads. How many threads are sticking out of the bolt after tightening. Tighten in a criss cross, like a car tire. tighten untill I have two threads showing out the top. Then criss cross tighten till three, and finally untill I have 5 showing out the top and make sure that all of my lock washers have colapsed, finger nail polish on the top of new bolts and threads seems like a good idea to me that red lock tight is kind of powerfull and the blue is kind of wimpy. I like finger nail polish. Hope that does not make me gay right? | | Thread Tools | | | | Display Modes | Linear Mode |
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