PERFORMANCE TUNING EXCELLENCE: THE TTS MASTERTUNE ADVANTAGE To our Valued Customers, When you invest in performance modifications for your Harley-Davidson—whether it’s a high-flow exhaust, a performance air cleaner, or a…
Geoff GaitesMarch 13, 2026
Let's Get Technical N Alpha A relatively simple design, N Alpha systems use only engine speed and throttle angle to calculate the amount of fuel needed by the engine.…
cubicJuly 15, 2023
This is where the precision customizing takes place. When it must be done and it has to be right, we take matters into our own hands. Not only standard procedures…
Geoff GaitesJanuary 12, 2023
Stock on all 2020 LiveWire™, CVO™, Police and Trike models and optional on all 2020 Touring models in the U.S. (except Electra Glide® Standard Model) is the Reflex™ Defensive Rider…
cubicJuly 8, 2020
Located in Costa Mesa, California, is a shop called The Harley Doctor, and the owner, Geoffrey Gaites, has been healing sick bikes since 1996. He has a PHD in Harley…
cubicJune 26, 2018
You can build your Harley any way you want, but when you're done, it's still a Harley. This statement has been made countless times by countless people allegedly wise in…
cubicAugust 22, 2015
CYCLEDOCTOR: Harley-Davidson Health Specialists from Geoff Gaites on Vimeo. Specializing in American V-Twins
Geoff GaitesFebruary 11, 2014
Complete newbie; less than an amateur. Never ridden on a dirt track. This Honda CRF 450 isn’t even warmed up and already my heart is racing. This is the famous…
Geoff GaitesDecember 28, 2013
Unfortunately there is no literature that can give you the perfect machine setup. Also suspension setup is individually dependent on the rider (style, preference) and track conditions, which vary from…
cubicFebruary 19, 2010
BEFORE: Front cylinder AFR samples taken at 10,15,20,30,40,60,80,100% throttle. Target AFR=13:1 AFTER: Delphi EFI (speed density) after VE table corrections. Target=13:1 In addition to the ignition timing, the other aspect…
cubicDecember 12, 2007
The commercial use of the lead acid battery is over 100 years old. The same chemical principal that is being used to store energy is basicly the same as our…
cubicApril 5, 2003
Everyone knows someone or has themselves gotten hurt riding bikes. Some are deterred, often permanently, and then there are those of us who are invigorated by the experience. I, obviously,…
Geoff GaitesSeptember 2, 1999