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Dialing in your Harley’s ignition timing is key to getting the best performance out of your motor. In this guide, Gnarly's v-Twin breaks down the fundamentals of spark timing—covering initial timing, timing advance, and how modifications like increased compression impact your setup. You’ll also learn how to read advance slope curves to fine-tune your ignition for optimal throttle response and power. Check it out: …

Not sure what size rim you need for your motorcycle tire? Check out the chart below for all the common motorcycle tire to rim sizes. Front Wheel 16" Front Wheel Tire Size Rim Size (inch) 110/90-16 2.15 - 3.00 120/80-16 2.50 - 3.00 2006 - 2007 3.50 - 4.00 130/90-16 2.50 - 3.50 150/80-16 3.00 - 4.00 17" Front Wheel Tire Size Rim Size (inch) 110/70-17 3.00 - 3.50 110/80-17 …

When customizing your Harley, it's important to double-check all parts to ensure you've got the right stuff. This involves taking careful measurements on everything, from tire heights and wiring length to gas tank volume and rotor size. Measuring the size of a rotor can be an intricate process; it's oftentimes hard to tell what rotor size will work best for the front and the rear of your bike. This quick guide provides complete fitment information for 11.5" front and rear rotors and 11.8" fr …