Honda re-invented the Supersport class with its original CBR600
sportbike. This platform is remembered not only for its versatility, but
for its race-winning performance. It was a motorcycle that fueled the
passion for a fast-paced life on two wheels. Despite past success on the
showroom floor, in recent years the CBR nameplate has been challenged
by other offerings from Europe and even Japan. But does Honda’s winged
warrior still have what it takes to mix it up more popular brands in
club racing? We wanted to find out so we went racing...
In the first part of our
2012 Honda CBR600RR Project Bike 1
saga we outlined the process of converting the bike from a banged-up
street bike to a legit-looking racer with the aid of former American
Honda mechanic John Ethell, owner of Camarillo, California-based Jett Tuning.
Initially we hoped to achieve a solid baseline set-up by spinning some
laps at a trackday in preparation for the races but the eight-to-five
grind of real life got in the way. So we showed up at Southern
California’s Auto Club Speedway for Round 7 of the WERA West Coast
series with plenty of work to do. Since the majority of WERA events are
Sunday-only we arrived at the track bright and early Saturday morning to
get a full day of practice and precious set-up time.
FIRST THINGS FIRST
In a race, where every second counts, being able to manipulate each
control with the least amount of effort and/or movement is the name of
the game. And that’s where all the money spent on control upgrades pays
off. In fact, it’s one of the most critical yet simple aspects of
dialing-in your racebike, and an area in which LighTech’s rear sets come
in handy (get all the details in the
LighTech Track System Rear Sets Review).
We sourced LighTech controls mated to Renthal grips and CRG brake and clutch levers.
Since I’m a little taller than most (6’0”) and my knees don’t have the
range of motion they did in my 20s, I prefer to have the footpegs
mounted in a relatively low and slightly rearward position. While this
compromises ground clearance at lean it allows for added comfort,
especially in a tuck, reducing fatigue and allowing me to ride harder,
longer.
Next up was the position of the handlebars. I prefer a wider bar stance
as it increases steering leverage while also giving me a little more
elbow room behind the windscreen. Thankfully, the Renthal-sourced
clip-ons offer plenty of adjustment as easy as loosening/tightening a
pair of Allen-key bolts. Only problem is that with the clip-ons angled
so far outward it limits steering lock which makes it tricky to maneuver
through the pits.
Although the stock levers function well we wanted finer adjustment so we
sourced a set from CRG. Precision construction and more finite range of
adjustment make these a must for both trackday riders and racers
seeking the utmost adjustability. Since I’m over the motorcycle’s front
end a lot on track, I prefer to have the levers angled downward, just
below neutral making them easier to grasp entering corners. I also like
the distance between the lever and bar at a middle-of-the-road setting
as to make it friendlier to reach with two fingers.
PRACTICE
As soon as I rolled onto the track for the first practice session the
bike felt right—much like it does in street trim—only sharper like a
precision, hand-crafted instrument—a testament to the versatility of
Honda’s CBR platform and the initial set-up of Ethell. Perhaps the most
notable difference compared to a stock CBR is how much taller the bike
sits and the rigid but precise, feel-every-bump–in-the-road character of
the chassis courtesy of the re-worked Traxxion Dynamics fork and JRi
shock. Road feel is further enhanced through a seat-less, racing-style
tail section topped with a thin pad of seat foam.
Jett Tuning had our Honda CBR600RR project bike dialed-in right from the get-go.
Our Honda steered into corners more sharply, yet retained that
predictable trademark Honda handling feel. Stability was just as
friendly. This, along with the tremendous grip from Pirelli’s latest
Supercorsa race tires made it easier to get acclimated to our project
bike’s improved cornering capability.
Since Ethell has spent time here racing during the AMA days, it was no
surprise that final drive gearing was spot-on perfect with the addition
of a 44-tooth
Renthal 520 Ultralight Road Rear Sprocket (two teeth larger than stock) and the Dynojet Quick Shifter Expansion Module
allowed for immediate, full-throttle upshifts. But since the CBR lacks a
slipper clutch (only Japanese 600 not equipped with one), we
experienced rear wheel hop (instability) during hard braking—especially
in Turn 5 (a flat, 90-degree left taken in second gear after braking
from the top of fourth gear). To compensate we exaggerated throttle
blips and released the clutch lever more delicately in order to better
match engine rpm to rear wheel speed before engine braking takes effect.
It was a Band-Aid fix however rather than a true cure.
Power-wise the CBR’s engine felt snappier and was more eager to
accelerate when the right grip was twisted despite power upgrades only
consisting of a
Yoshimura RS-5 Exhaust System paired with a Dynojet Power Commander V
and VP Racing’s MR12 race gas. Throttle response was silky smooth which
increased trust when applying throttle mid-corner. The result was a
bike that had a stronger, meatier powerband from as low as 5000 rpm (see
dyno chart). Power continued to ramp up through the mid-range and had a
nice mellow hit around 13,000 revs. Only problem was top-end power
flattened as the engine neared the rev-limiter. Normally that could be
cured with an early upshift but considering the tighter, stop-and-go
configuration of Fontana’s 21-turn road course, short shifting isn’t an
option—especially on a 600.
As noted in Part 1, Ethell is a fuel-injection tuning master—having the
know-how to modify fuel and ignition tables on his laptop PC, at the
track. With the addition of the Power Commander the level of engine
tune-ability is astounding offering adjustment in zero, two, five, 15,
20, 40, 60, and 100-degree throttle angle openings as well as every 250
rpm.
Each session, Ethell continued to refine the powerband in an attempt to
maintain top-end power longer, without compromising precious corner
exiting mid-range. Everything seemed to be going to plan until the
afternoon. With the mercury hovering upwards of 105 degrees, he had
warned me that the MR12 gas may vapor lock. I just shrugged it off as
some mechanic's hocus pocus…
Boy was I an idiot. So there I am—just beginning to pick up the throttle
off a turn when the engine hesitates for a split second. It happens
again, then again. I pull in the clutch thinking the worst... did I
break it? Did it break? The engine goes straight to idle. I blip the
throttle a couple times and the motor bogs and then cuts out completely.
I hold down the starter button as I roll through the grass but the
engine doesn’t fire. I wait a few moments before trying again. The
engine eventually fires but won’t accelerate cleanly. I nurse it across
the field and into the paddock… vapor lock.
Since MR12 has a lower vapor point it changes from liquid to gas at a
lower temperature compared to other fuels. Normally this wouldn’t be an
issue but due to the extreme 100-plus degree air temperature, it
happened to us. The solution? Blend it with another VP product, like
U4.4 or get it ice cold and hope it stays cool enough during a race.
RACE DAY
After peeling off the lower fairing and wheeling our CBR through
mandatory tech inspection (in order to make sure the wheels and brakes
don’t fall off, and no slippery engine fluids leak onto the pavement
causing you or someone else to crash) race day begins with a quick
rider’s meeting. There, WERA folks address any possible safety concerns
and give a rundown of the day’s schedule. Afterwards each group (divvied
up by engine displacement and/or lap times) gets two quick rotations of
practice followed by an hour-long lunch break, then it’s time to go
racing!
There’s nothing like a motorcycle road race to get the blood pumping and make you feel alive!
I had four races on tap including B/C Superbike (750/600), and B/C
Superstock. After a full-day of practice under my belt I did one of my
faster laps of the weekend in morning warm-up without even really trying
(1’36.52) so I knew I could drop a couple more seconds come race time
when the good ol’ red mist fills my visor.
In order to avoid the fuel overheating problems we had yesterday we
quite literally kept the fuel on ice, in a cooler, in an effort to keep
it cold as possible. Fortunately since WERA races are only six-lap
sprints, Ethell had anticipated that the gas would remain cool enough to
go the distance. Other preparations included mounting up a fresh pair
of SC2 compound
Pirelli DOTs front and rear (120/70-17 front, 180/60-17 rear) courtesy of the folks at CT Racing.
As usual my nerves were in full flutter mode as I slid on my suit and
prepared for the race. Of all the sports and crazy adrenaline-filled
activities you can participate in life, whether it’s leaping out of a
perfectly good airplane, pinning it over a 90-foot triple on a dirt
bike, or pitching it sideways in a car around your favorite freeway
onramp, there is nothing like a motorcycle road race to put your mind in
a quasi-panic.
For some, myself included it’s a nerves thing—like the feeling you get
when you have to stand in front of a group of strangers and try to pitch
them on something, or the sensation you get right before you know
something really bad is going to happen. It’s a unique emotion—one that
makes you feel alive, where all life’s drama, rules, bills, and whatever
legitimate concerns no longer apply. It’s just you, your motorcycle and
the desire to smoke anyone and everyone in front of you… It’s a
beautiful thing.
Since I didn't race with WERA this season I was obligated to start all
the races from the back of the field (grids are based by points, and if
you don’t race you don’t get any points). I didn’t care—as it’s always
more fun to try to chase anyways.
The road grip and handling afforded by the Pirelli Diablo Supercorsa tires is second to none.
Fourteen racers lined up for the C Superbike Expert race—our first 600
race of the day. When the green flag dropped the CBR proved to be really
friendly to launch. Feeding out the clutch as quick as possible while
keeping the tach needle above 11,000 revs is the name of the game here
and this is another area where the Honda performs excellently. I got
such a good jump that I scared myself going into Turn 2 as the pack
started to bunch up (The Turn 1 chicane is skipped at the start of club
races at Auto Club) so I let off the throttle early and lost a position
or two.
Turn 3, which acts as Turn 1 at the start of the race is a slow speed
left-right chicane and I heard from others that it was one area that
typically sees a lot of carnage at the start of the race. Not wanting to
splatter myself on the ground I played it safe. I was afraid of making
passes unless I could do it cleanly as all that was running through my
head was ‘what if I touch this guy on accident and we both crash, OMG.’
My lap times were equally unimpressive as I lapped even slower than I
did in warm-up… What the heck? I ended up finishing 10th.
Next up was B Superbike & Novice. After getting a good start in the
first race I figured I had starts totally dialed-in. But this time I
didn’t hold the engine’s rpm high enough (remember, always keep it above
11,000 rpm) so it bogged slightly off the start. Having worked out some
of my racing jitters I was more assertive which helped going into the
first turn. The bike felt good and planted with the tires offering full
and immediate traction allowing you to push right away.
There’s nothing like a race to help you understand parts of the track
you couldn’t by yourself. And the dangling carrot technique was aiding
me through the fast right-left Turn 10/11 chicane—an area that had
puzzled me up until… well, now. With my confidence increasing I was
giving it my all and running around sixth place. I felt good and I was
excited to see a high 1’34 on my lap timer—my fastest lap thus far.
You wouldn’t think completing six laps around a 2.36-mile road course
would wear you out—but do it in 100-plus degree heat when riding at 100%
and this desk jockey got tired fast. By the fourth lap I was already
starting to fade. It wasn’t so much my body as it was my mind. And
that’s the crazy thing about road racing: it’s such a mental sport, one
that tests a person’s focus and concentration with a fine line
separating success and failure.
Speaking of concentration, mine was waning, and as I entered Turn 12, a
quick right-hander taken in second-gear, I turned in too early and ran
into the raised white curbing while leaned over. Oops. ‘I’m crashing’ I
thought to myself as the front tire folded over. I had already given
up—prepared for the inevitable, then in a split second the bike picked
itself up, like nothing even happened. I was amazed, relieved and
thankful, yet still cursing myself having used my “get out of jail free”
card for something as silly as not paying attention and missing my
mark.
After the race I told Ethell what happened. He looked over the bike and
had noticed that the LighTech frame slider had scuffs on it meaning that
it had slid against the curbing and actually lifted the bike up saving
it after I had crashed. I now know to install frame sliders on every
race bike I ever buy. Despite my near-miss I still finished better than
my first race in eighth.
The LighTech frame sliders saved our bacon quite literally preventing a
crash when Waheed ran a little too close on an inside curb.
With each race I was continuing to improve in terms of lap times and
even netted a fifth-place in the C Superstock expert race. Still,
considering some of the faster guys were lapping in the 1’31-range, more
than anything I wanted to edge closer to those times. I’d have one more
shot.
In the final race of the day I nailed the start and was in second place
for the first half of the lap until I was overtaken by young gun Jason
Aguilar. Although he was faster he was only a few bike lengths ahead.
More than anything I tried to maintain focus and use the good ol’ carrot
technique to keep him in sight. Now we were lapping in the low
1’34-range marking a new personal best. I went on to finish third,
marking my best finish and lap time of the weekend.
At the end of the day I was all smiles. Amazingly LighTech’s frame
slider saved me from looking like a complete squid (well, almost) and
both bike and rider were still standing in one piece. Although I was a
couple seconds off the front runners, I improved both my finishing
result and lap time in each race. But perhaps most impressive is how
friendly our CBR project bike was to race—a testament to both Jett
Tuning and the engineers at Honda for creating a bike that is just as
easy to ride in full race trim as it is with headlights and turn signals
on the street.