












🔩 Unlock your Harley’s potential with precision power!
The Mainshaft Sprocket Wrench is a precision-engineered tool designed for Harley-Davidson Big Twins (1936-2006) and Twin Cam models, featuring a 1 7/8 inch socket and 5.5-inch depth. Made from durable alloy steel with a corrosion-resistant black oxide finish, it ensures long-lasting performance for removing and installing transmission pulley nuts. Trusted by mechanics and enthusiasts alike, this wrench delivers professional-grade reliability for efficient belt and sprocket maintenance.
| ASIN | B08GSCZSY9 |
| Best Sellers Rank | 143,211 in Automotive ( See Top 100 in Automotive ) 74 in Motorbike Sprockets |
| Brand | E-cowlboy |
| Customer Reviews | 4.7 4.7 out of 5 stars (600) |
| Date First Available | 27 Aug. 2020 |
| Item Weight | 1.28 kg |
| Material | Alloy Steel |
| Model Number | YM178 |
| Package Dimensions | 17.6 x 7.19 x 6.91 cm; 1.28 kg |
B**Y
Worked exactly as it should. Seems to be a good quality and did the job I needed it to do. Would recommend
C**N
Works A1 on a Shovelhead 4 speed transmission ; even the round ''donut'' adaptor has the right thread. Bought in july '25.
J**Ö
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**.
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.
C**E
Just like the harley tool, works great, alot cheaper
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