Of
course I don't ride it hard enough to notice any difference at all. Still, I
wondered what gains could be made by modding the bike.
Thinking the exhaust could be opened up a bit and the air intake could be opened up a bit to get some performance gains.
These two mods likely would make the engine run leaner so a fuel mapping modification
would also be needed.
I don't rev my engines high trying to get the last bit of
horsepower from them. Mostly I like the feel of low and mid-range punch. The
plan was to use a Power Commander to get control of the mixture first then
change the exhaust, then open the air intake.
I spoke with the good folks at Power Commander and let them know what I planned to do. I learned I could expect
a 10 to 15 percent increase in low and midrange punch with the mods I am going
to make. Now, know that the SR400 puts about 25 horsepower to the rear wheel and
it has a max torque of approximately 20 pound feet. (Depending on where you get
your specs) The full 15 percent increase would up the numbers to nearly 29
horsepower and 23 pound feet of torque.
The salesman at Power Commander told me Yamaha has the fuel mixture near perfect on the stock bike and there would be very little gain with the PC only, but it would be wise to be able to control
mixture as the other mods are made.
Those are nice increases and may be worth the several hundred dollars needed to complete them. Not yet sure if I will make
the changes but likely I will. Also not sure when I will get around to starting the mods, but do expect to get started in 2026.
please do update the threat in time to come. I'm also looking for some power gains for my 2016 SR, hoping to hit 30+hp from it and eventually some sprockets with reduced teeth to up my top speed
ReplyDeleteI think 30 may be doable. The folks at Power Commander believe a mildly tuned and relatively quiet bike could get gains of about 15%. That puts it at about 29 hp, with about a 15% increase in midrange hp and torque as well.
DeleteIf you don’t mind extra noise more gains are out there. I do not like a noisy bike or peak power at the upper rpm limits at the expense of ride ability, so will stay with a mild tune.
Will definitely keep everyone up to date as I make the mods.
I've got a PC6 installed, but what a waste at that as there are no maps readily available for this particular machine.
DeleteYou are right with your comment that there are not many maps available for the SR400 when using the Power Commander 6. For riders like me, there is a better product called the Power Commander Fuel Controller. The PCFC has plenty of options to use for those of us making modifications to a bike that will remain a mildly tuned street bike.
ReplyDeleteThe PC6 is much better suited for someone that is tuning for the track and has the ability to develop the needed maps from their track testing session. That is certainly not me, I prefer to ride over tinkering with a computer.
My suggestion is call the folks at Power Commander, they are very willing to help.