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
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
BC 2 into 1 exhaust - $1,104 Installed (in brushed stainless) / $1,204 Installed (in ceramic black)
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%
Tune in next week for even more custom work!