2009-2010 V-MAX Page
Stock Vmax Vs. All stock Vmax w/ YEC Race ECU.
adds a few hp at the upper rpm ranges, and removes the power restrictions
and gives a true top speed of appx 165 mph.
next graph shows that race slip-ons have no advantage as long as the catalyst
is still on the bike.
Stock mufflers vs. race slip-ons, both with catalyst still on bike
and race ECU
After adding a catalyst eliminator pipe (Akrapovic W/crossover
tube) the power available is very evident.
Race slip ons w/cat vs. Race slip-ons w/o cat
The YEC ECU's tuning program (mapping) is still EPA compliant
and is for use with the catalyst. It does not disable fuel cut or supply
enough fuel for catalyst elimination as can be seen in the chart below.
Adding a power commander 5 puts back the missing fuel that the YEC race
ECU cannot supply.
Slip-ons w/race ECU and cat elimination pipe vs. same
with PC5 and Ivan's map
There is more to come from this bike as there is no ignition
module available yet to adjust the timing.
(Which should give a few more horses and better MPG and even cooler running
temps than with the PC5 alone.)
Also, there is not an aftermarket air filter available
A modded airbox w/ race filter should give a few more HP as well.
(So far, we have not touched the intake system, but we will when the filter
We will be testing both of these items as they are made available.
So for now, this is where it's at for us.... A huge power
increase over stock w/enough power to get you into the 8's (if you have
the skill) with great driveability and much cooler running. Clearly the
most powerful stock engine that has been on my dyno.