When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Anyone else have an issue with the derby cover bolt threads in the primary. I replaced my derby cover and 3/5 threads tripped when torqueing to spec (~90 in-pound) Luckily I had some heli-coils in the garage and drilled out and fixed it. Wondering if this is a common occurrence or if anyone else had the same issue. TIA.
Yea it happens.........snug em down,,,,,,,,forget the tourqe value. but keep the sequence........they're too sensitive in my opinion.
the seal inside should keep it from leaking, thats the only thing it's holding back
Thanks. That's usually what I do, but decided to get "fancy". Taken it on and off a few dozen times over the years and this is the first time I used the TW. Go figure.
I've torqued hundreds of those screws to 95 in-lbs, and I've yet to strip a primary cover or screw. That being said, I've always used a fairly expesive Proto torque wrench with a dial indicator. Total range is 0-250 in-lbs.
Thanks for the feedback. I was more surprised than anything. I do not start out at the final value and I used the correct sequence. At 60 in-pounds it was all good and the feel was as it should be. I went up to 90 and stripped one. I figured might as well do the rest and see what happens (had to fix it anyway). 3/5 bad. I'll get the torque wrench calibrated as see what's up.
Chances are more than likely that the bolts and threads have been stressed over all the times you had it off and back on, it happens. If using a good and accurate torque wrench to the proper torque from day one - it probably would not have happened.
Repair it and move on as just one of those mechanical things that happen.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
Stripped Threads
