Knobtown Cycle proudly offers the TECMATE TESTER CRANK / ALT TS-121. Your Kansas City motorcycle parts experts for over 40 years.
Product Description
TESTER CRANK / ALT TS-121
- The ultimate pocket tester for on-vehicle performance & alternator voltage testing with either 12V lead-acid or 12.8V LiFePO4 starter battery – easy troubleshooting from cranking to charging
- Checks battery voltage to provide an indication of battery health; checks battery starting power and checks charging system without disassembly by indicating low charging voltage
- As easy as 1-2-3, connect to battery, check state of charge, start engine tester displays cranking voltage and vehicle charge simultaneously – 15 seconds is all you need
- Includes two cable straps, adhesive hook-and-loop straps and screws for use if mounting the removable backplate into an enclosure
- Display cranking volts down to 6V and charge voltage range up to 15V – check weak battery or overcharging
- Easy to use! Connect with the included clips to the battery or connect to an installed SAE battery lead
- Battery clips are removable and replaceable
Part Locations
| Location |
Available |
| Wisconsin (WI) |
5 |
| New York (NY) |
0 |
| Texas (TX) |
0 |
| Nevada (NV) |
10 |
| North Carolina (NC) |
0 |
| National Total |
15 |
Stock levels last updated: December 26, 2025 12:15 PM
Professional Installation Available
Knobtown Cycle offers professional installation services. Contact us via a service request to learn more.
Thank you for Shopping at Knobtown Cycle!
When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.
Reviews
There are no reviews yet.