







🛠️ Master your Harley’s heart with precision power!
The E-cowlboy Mainshaft Sprocket Socket Tool is a high-quality, black oxide finished wrench designed for 2 1/4" nuts on Harley-Davidson Twin Cam and Dyna models from 2006 onward. Featuring a threaded bushing and compatibility with 1/2" drive ratchets or breaker bars, it delivers reliable, professional-grade performance trusted by hundreds of Harley enthusiasts.


















| ASIN | B09JGD7WVQ |
| Best Sellers Rank | #33,409 in Automotive ( See Top 100 in Automotive ) #551 in Powersports Accessories |
| Brand | E-cowlboy |
| Customer Reviews | 4.8 4.8 out of 5 stars (619) |
| Date First Available | October 14, 2021 |
| Item Weight | 3.19 pounds |
| Manufacturer | E-cowlboy |
| Manufacturer Part Number | 21.4yc |
| Package Dimensions | 7.44 x 3.11 x 3.11 inches |
J**Ö
Did the job
Works well and the price is unbeatable. The nut on my Dyna was very tight so I had to hammer it with a big impact to get it off and the socket held out just fine.
B**Y
Quality Tool for the money
Worked exactly as it should. Seems to be a good quality and did the job I needed it to do. Would recommend
C**E
good value
Just like the harley tool, works great, alot cheaper
R**O
Nice quality and fit.
Excellent socket. Saved me $$$ over the $200+ alternative. Paid for its self on the first use.
C**E
works great
got the job done and is exactly what i needed. worth every penny!
K**E
Great to get the job done
Did the job tight fit on the nut as needed. Guide and thread protector is a great touch. Socket not super hardened in square drive that left some deformation and would likely be a problem if doing these nuts repeatedly but otherwise great value to get the job done
R**R
Correct product
What I was needing
M**Z
Works as it should !!!
its rare that you would use it often as a do it yourself mechanic. But. when you need it. well well well it makes life easier. Used it a few times chasing transmission leaks only to find out the vent tube was clogged. Now, it sits and waits as part of my specialty tools just incase I need to use this socket again. well worth it.
C**N
Works A1 on a Shovelhead 4 speed transmission ; even the round ''donut'' adaptor has the right thread. Bought in july '25.
B**.
I used my impact on it to remove the nut and it held up no problem. Now the bushing guide that screws onto the end of the shaft didn't go on. They did not cut the threads the same. But it is only made of soft material ( Aluminum i think) so you can start to thread it on then force it on a little at a time. Just turn it till it's really tight then back it off and then turn it till you can't again and back it off and eventually your spline threads will cut new threads into the bushing guide. Just make sure you put some oil on the threads before you start and keep adding a little oil while your doing it. This is not the ideal way of doing it, if you have the proper tap size is the right way but this will work. If you don't get to far carried away by doing it this way you will be fine. The shaft is made of alot harder steel then the bushing so you shouldn't damage the threads on the spline.
D**E
10/10
B**E
bought for my bike and was 1/4 the price of the ones at clare’s and works exactly the same. don’t doubt amazon parts and tools.
M**M
Fantastic !!
Trustpilot
2 days ago
5 days ago