Best "Net Gain" CB11 Exhaust Option

[PowerDubs_imp]

So... you're looking for 'performance', eh?

Why not just buy a performance 'bike? Then leave the CB as the beautifully-running 'retro' bike it is, with no pretensions of 'performance' (120mph not fast enough?), and enjoy the stock way that it runs. Reliability allied to a nice torquey motor - why ruin that?

I don't get why loads of you guys buy THIS 'bike and then just want "more power", totally ruining the WAY this CB delivers the type of power it does.

TORQUE... not power is the name of this game.

Each to his own, I suppose.

Mind you, the bland looks of the CB is crying out for "something" to be done to liven it up! Four exhausts would do that, a la CB750..

I find posts like this insulting, inflammatory, and most importantly- IGNORANT.


My bike makes more power, MORE TORQUE at every rpm, than stock.

It also rides smoother, more comfortable, and is awesomely cool to look at.

I wanted a classic UJM, I don’t want a sport bike. I also wanted more snot, and I’ve got it.

Your engine performance, and your attitude need improving.

I made - to the wheel - 100HP, 72.5TQ on stock ECU- so piggyback fueling, no IGN changes.

I have since added a Guhls ECU tune- need to get her back to the dyno and see what I’ve gained.


https://youtu.be/l-JUu8JBjGc





Sent from my iPhone using Tapatalk

I find posts like this insulting, inflammatory, and most importantly- IGNORANT.


My bike makes more power, MORE TORQUE at every rpm, than stock.

It also rides smoother, more comfortable, and is awesomely cool to look at.

I wanted a classic UJM, I don’t want a sport bike. I also wanted more snot, and I’ve got it.

Your engine performance, and your attitude need improving.

I made - to the wheel - 100HP, 72.5TQ on stock ECU- so piggyback fueling, no IGN changes.

I have since added a Guhls ECU tune- need to get her back to the dyno and see what I’ve gained.


https://youtu.be/l-JUu8JBjGc





Sent from my iPhone using Tapatalk
The man himself has spoken. Thanks for chiming in, Josh

That last Dyno pull nearly got me in the mood

What exhaust are you running? I'm in a situation where basically I get to choose between either a Staintune slip-on or a Moriwaki 4-1 system(1 piece version, looks nearly identical to the Yoshi?)
Leaning towards the full Moriwaki for obvious reasons, unless you have reason to believe the Staintune with the stock headers should be the way to go, power-wise

Exhaust aside, I've been debating how or in what order I should approach the aforementioned complementary mods. Do you recommend I wire up the PCV prior to getting the ECU flash?

Also very much looking forward to seeing the results of your next Dyno run, whenever that may be

I am running arrow headers and a staintune muffler.

Runs great, sounds great, look great.

I would happily run a Moriwaki 4-4 though as those look and probably sound wonderful.

I think any exhaust that ditches the cat and more open muffler should see roughly the same power gains. Technically a 4-1 is considered most efficient as far as pulses- but I think a lot of that is old school data from many decades ago.

Naturally as engine displacement gets larger, eventually dual exhaust is required.

4-1 eases any discrepancy on cyl tuning- but if you are tuning for power, not lean cruise economy- it shouldn't matter. DJ does have dual sensor kits I briefly seen somewhere- not sure if they have one for the DLX, or if it was just for big cruisers like a harley.

On tuning- an ECU flash is locking you to some other guys settings on the day and location that tune was written. Better than nothing? Sure... but if you are already spending considerable money on a full exhaust...why skimp on feeding the engine?

Flash ECU- good, but locked, and not locked for YOUR bike, in YOUR riding altitude and weather.

PCV- just does fuel, and honestly if you look at the supplied 'maps'- they just throw 13.2 at the table...and the 2 trim files they show are different than each other...for no real reason than 2 different bikes on2 different days made them. Neither will 100% match your bike.

To me, the best answer is an ECU flash so you get an ign remap, the lower gear reductions removed, higher redline, higher top speed- AND both the PCV and Auto-tune box.

The addition of the auto-tune box will let YOU pick what fuel you want at what RPM and throttle position you want...and will adjust to that on the fly while you ride- regardless of temperature, altitude, humidity, etc..

I haven't tested it yet- but Popgun figured out a speed sensor wire on the bike- and the Dynojet setup has the capability to have different fuel maps for each gear...as load does change how the engine requires mixture ideally- and you can map say 6th gear just to get great MPG on a long trip.

Yea, I know- ECU flash + both DJ boxes, and you will probably need a new O2 bung welded into whatever header you chose- is a lot of cabbage- but it is worth it. And it is fun to play with.