PCV Question, wonder if someone could explain this.

[kmoney_imp]

So I bought a member's take-off Ryujin Hand-Bent Full Exhaust on eBay and am looking into how I plan on mapping it. I plan on running it without the baffle, and figure I will need at least a bit of a re-tune to get me along until I eventually take it in for a real dyno session.

There are only two maps on the Power Commander website (stock and Yoshimura slip-on muffler). I'm running the map for the stock bike right now, and was thinking I would switch to the Yosh slip-on map as a stop gap, but then I noticed the following.



The map for the slip-on exhaust is massively leaned out (red squares) compared to PCV map for a stock bike, which fattens most of the rev range (green squares).

I just can't figure out how with better breathing you would want less fuel? I figured the slip-on map would at least get me in the direction of fattening things up a bit, but I guess I'd just be better off sticking with the stock map until I can get one made? Or is there actually a reason why you would want less fuel with a better breathing exhaust?

 

[Inhouse Bob]

Did you ever get this figured out?

 

[CIP57_imp]

K,

Just saw this post, you want to run the stock map with full exhaust. I had that map programed into my ECU when I had my bike flashed and my A/F ratio where almost spot on.(touch rich on top) I would have a tuner set it up when you have the chance.

 

[kmoney_imp]

Did you ever get this figured out?

I did what CHIP 57 suggested above (thanks BTW) and just ended up running the stock map. It seems to be okay. I've done about 250kms so far and with the baffle in, there aren't any lean pops, hesitations, or excess heat. Good enough to make it obvious I'm not going to burn a piston or overheat the thing just in casual riding (which was really my only worry).

I will definitely take it to a tuner soon, the one I want to use is in Washington State (Nels at 2wheeldynoworks). It's just a matter of time to get there....

 

[Inhouse Bob]

Cool. Back to your original post, though, perhaps the Yoshi exhaust is actually more restrictive than the stock? That's the only explanation I can think of. But then, I don't know much

 

[kmoney_imp]

Cool. Back to your original post, though, perhaps the Yoshi exhaust is actually more restrictive than the stock? That's the only explanation I can think of. But then, I don't know much

That's the only thing I can think of too.

 

[CIP57_imp]

If you get any off throttle popping do the par mod, takes 5 minutes.

PAIR Valve Mod

 

[Inhouse Bob]

UPS just dropped of my new-to-me PCV, so we'll just see what we see. I'm running stock, so there shouldn't be any surprises. Fingers crossed!

 

[CIP57_imp]

K,

That map with the Yoshi Can is is off a 2014 standard. A member went out to Vegas and had his bike mapped by Power Commander. Honda changed the A/F ratio for the 2014 model ( different ECU #'s) and explains why where seeing a completely different map.

 

[kmoney_imp]

UPS just dropped of my new-to-me PCV, so we'll just see what we see. I'm running stock, so there shouldn't be any surprises. Fingers crossed!

You will love it. Even stock this was probably my most value added mod to the bike. Makes it so much more rideable, with negligible loss in fuel mileage.

 

[Inhouse Bob]

Got it installed with not too much drama. Getting the connectors stuffed through the frame was the biggest challenge. I just hope I got that clip installed correctly on the bottom of the tank. It seems dodgy to me. Will ride long tomorrow and see what we see!

 

[Gumby 1100_imp]

K,

That map with the Yoshi Can is is off a 2014 standard. A member went out to Vegas and had his bike mapped by Power Commander. Honda changed the A/F ratio for the 2014 model ( different ECU #'s) and explains why where seeing a completely different map.

If the stock ECU mapping is so different from 2013 to 2014, why is Power Commander still only showing the one model number PCV (16-040) for both 2013 and 2014 CBs? (Note: only two maps are available from PC, shown below...)

Has it been confirmed that the stock 2014 ECU is mapped richer from Honda? Based on the two maps posted by kmoney, CIP57's explanation seems reasonable. But if the 2014s have a much richer ECU map, using the 2013 PCV map (16-040-001) would be adding much more fuel than the CB needs in the mid range. If so, would it be better to ask Power Commander to load the map made from a 2014 with Yoshimura RS-3 and Stock Air Filter (16-040-002) for use on all 2014 CBs? Would they even do that for a customer, or is it the responsibility of the end user to load and change maps from the stock default map (16-040-001)?

It would seem that several forum members are running either used or new 2013 PCVs on 2014 bikes with no issues. Which map(s) are you using and with what results?

Map No.: 16-040-001 (stock bike)
Map No.: 16-040-002 (Yoshimura RS-3, Stock Air Filter)

Your thoughts would be appreciated!

 

[Gumby 1100_imp]

In my typical fashion, I'm probably over-thinking this, but as a 2014 owner, there seems to be a legitimate concern about which PCV map to use.

I'm still debating if I need to get a PCV with just a Staintune and K&N OEM size Air Filter. I've already blocked the PAIR Valve and installed an O2 Sensor Eliminator Plug, so there is no decel popping or apparent surging. In fact, fueling seems very smooth and responsive, much better than stock...maybe just a tad ragged after really hot, stop-and-go city driving.

I've seen PCVs for as little as $269 in the U.S. (Fuel Moto - Motorcycle EFI Tuning, Exhaust Components & Performance Components), but by the time I get one to Canada I'm likely looking at over $450 CDN (including: shipping, duty, taxes, exchange...).

Surely another 2014 owner with a similar setup will share their results or opinion?

Thanks in advance...