Here at TTRNO we love building cool bikes and what’s better than making a head turner is being able to keep it!  Each of us at TTRNO have committed to building a custom ride of our own and we want to share our journey with you.  Each week (or so) we will highlight the steps each of us is taking to make our dream bike.  First up:

Jared’s Bonneville Road Racer 

The goal for Jared’s Bonneville is to be a great street bike and an even better track bike, think Thruxton cup bike with no rules.  With this plan Jared can port and polish the head, build a big bore kit and do anything he wants without having to worry about getting kicked out of a specific race class.  This isn’t a race bike, just a classic looking bike made to run laps around sportbikes on track days. 

Here is how his bike started out its life.

First thing we’ll look at is what we would consider “Stage 1”:

Intake and Exhaust

Airbox eliminator kit - $641 Installed

    In order to make more power you need 2 things, more air and more fuel.  This clean looking airbox eliminator kit has K&N air filters and a well manufactured battery box that has mounts for all the relays and fuses.  A free flowing air filter means that more air is getting into the cylinders but without a free flowing exhaust this would be a lost cause.

BC 2 into 1 exhaust - $1,104 Installed (in brushed stainless) / $1,204 Installed (in ceramic black)

This exhaust not only sounds great with a low tone that’s just loud enough, but it allows the exhaust to flow significantly better.  The black ceramic coating also prevents heat from escaping through the exhaust walls with better insulation.  Since hot air flows faster the ceramic coating provides even bigger power increase over brushed stainless.  Now that there’s more air there needs to be more fuel as to not run lean.

Dyno tuning - $278 price may vary

    All bikes must run at a specific air to fuel ratio to operate properly.  Most manufacturers run engines at what is called stoichiometric efficiency, 14.7:1, this means that there are 14.7 parts air to every 1 part fuel, whereas in a performance application we try to get somewhere around 13:1.  The way get to this ratio on a fuel injected bike is by manipulating each fuel cell in the ECU’s fueling matrix.  With the amount of additional air flow through Jared’s cylinders, it required significantly more fuel, so after adjusting every cell in the matrix he produced an additional 8.31 HP and 5.75 ft-lb!  That’s more than a 13% power increase!


Tune in next week for even more custom work!