Author Topic: Little More Power  (Read 5109 times)

0 Members and 1 Guest are viewing this topic.

Online motorboy

  • CB500X God
  • *****
  • Posts: 1348
  • Bike: 2019 CB500X
  • Country: us
Re: Little More Power
Reply #30 on: August 13, 2020, 09:58:37 PM
Who said Honda does not publish HP -take a ride to your dealer and ask him if you can see a statement of origin on the X it's right there
It's not a big motorcycle just a groovy little motorbike

Online motorboy

  • CB500X God
  • *****
  • Posts: 1348
  • Bike: 2019 CB500X
  • Country: us
Re: Little More Power
Reply #31 on: August 13, 2020, 10:00:27 PM
*Originally Posted by Revoflyer [+]
From this review: https://www.bennetts.co.uk/bikesocial/reviews/bikes/honda/honda-cb500x-2019-review

"the Honda fits neatly at the top end of the 35kW (46.2bhp) limit. In fact, according to the Japanese project engineers joining us on the launch, the engine will actually tip the scales at 37kW but adjustments to the throttle bodies were required for the compliance"

So the 2019/20 definetely has restrictions to detune for compliance. The question is, that nobody has been able to answer, does the American models yield a full 37W or has Honda just decided for a worldwide 35kW output in the name of production logistics.   

My logic says no, because while Honda in northamerica does not publish HP, they sure do in Brazil, always listing it at 50.4 CV = 49.6HP, further many northamerican reviews states 49.6 hp which is exactly 37KW. Why would Honda restrict bikes worldwide when its only the eurozone that has the A2 requirement.

It would be great if we could have an american rider check the inlet on any model year. If there is no restrictions, then we could reason that Honda does differentiate  pr. region and us yankees do not have to look for de-restricted parts.     
Real simple way just check part numbers
It's not a big motorcycle just a groovy little motorbike

Online CBRDEAN0

  • CB500X Pro
  • ***
  • Posts: 103
  • Country: gb
Re: Little More Power
Reply #32 on: August 13, 2020, 10:16:47 PM
*Originally Posted by motorboy [+]
Real simple way just check part numbers

Just had a quick look and the 2019 USA airbox and intake trumpets are different to the 2019 UK airbox and intake trumpets.

Offline Oyley

  • CB500X Master
  • ****
  • Posts: 741
  • Bike: CB500x 2019
  • Country: gb
Re: Little More Power
Reply #33 on: August 13, 2020, 10:30:12 PM
Out with the Dremel...not for the first time ! 😉

Online Swanny

  • CB500X God
  • *****
  • Posts: 1018
  • Bike: 20 500X & CB1300
  • Country: england
Re: Little More Power
Reply #34 on: August 14, 2020, 11:24:37 AM
Nice thread. I like the idea that we might get a little bit more power
I hope so  :082:
Life... It's Just a Ride  :305:

Online CBRDEAN0

  • CB500X Pro
  • ***
  • Posts: 103
  • Country: gb
Re: Little More Power
Reply #35 on: August 14, 2020, 01:00:51 PM
*Originally Posted by Oyley [+]
Out with the Dremel...not for the first time ! 😉

Looks like more than a dremel will be needed - totally different design.

2019 USA model - https://www.bike-parts-honda.com/honda-motorcycle/500-MOTO/CB/2019/CB500XAK/Frame/FRONT-COVER--AIR-CLEANER/99855/F_25/2/38761

2019 UK model - https://www.bike-parts-honda.com/honda-motorcycle/500-MOTO/CB/2019/CB500XAJ/Frame/FRONT-COVER--AIR-CLEANER/100164/F_25/2/36777

Offline Oyley

  • CB500X Master
  • ****
  • Posts: 741
  • Bike: CB500x 2019
  • Country: gb
Re: Little More Power
Reply #36 on: August 14, 2020, 01:44:17 PM
That...will need a wallet or card !
I wont be bothering with that.
I found the Sorpion exhaust made noticable difference in riding that I am more than happy with, everywhere on the hilly route I take to the area we ride is now taken in a higher gear with no bogging down .
If cutting a bit of plastic made the same difference again..I would do it.
But I'm not into changing all those items listed, for sure.

Offline Oyabun

  • CB500X Master
  • ****
  • Posts: 600
  • Bike: 13 500XA, 16 FA
  • Country: hu
Re: Little More Power
Reply #37 on: August 14, 2020, 03:27:59 PM

The second part you have referenced is still the previous model (model code of earlier model based 500x is XAJ, while the new model is XAK)
Here is the parts fische reference for the new model based 2019 eu bike, which is using the same velocity stacks as the US model.
https://www.bike-parts-honda.com/honda-motorcycle/500-MOTO/CB/2019/CB500XAK/Frame/FRONT-COVER--AIR-CLEANER/99402/F_25/2/36779

For those who look for conspiracy theories on honda posted power figures. Eu uses Hp, Us and Americas (incl Brasil) use bhp figures. The HP is measured by hooking up the engine to a dynamometer, while BHP is measured in a controlled environment without anything attached to the engine (e.g. no water pump etc) therefore bhp figures of thr same engine will be higher.
Last Edit: August 14, 2020, 03:34:00 PM by Oyabun

Offline Oyabun

  • CB500X Master
  • ****
  • Posts: 600
  • Bike: 13 500XA, 16 FA
  • Country: hu
Re: Little More Power
Reply #38 on: August 14, 2020, 03:41:59 PM
*Originally Posted by Threepot [+]
Think the alloy replacement s are from Honda? He states that in the comments for the video clip.

No, they are made by a small race shop in Slovakia. Two members on another forum made direct comparison on the dyno, one against the restricted stacks, another againstthe non restricted us stacks.
The later comparison didn't bring any change (in fact the ally stacks rewd slightly lower, but the two dyno runs were apart in time, so let's call that a draw).
The earlier shown that the non restricted stacks gaina few hp (1-2) but loose the same amount of midrange. So this is a tradeoff. Considering their price in case you want those few ponies in the rev range and willing to loose some of ghe midrange, I'd just cut and dremel the existing stacks and forget about it.

Offline Oyabun

  • CB500X Master
  • ****
  • Posts: 600
  • Bike: 13 500XA, 16 FA
  • Country: hu
Re: Little More Power
Reply #39 on: August 14, 2020, 03:48:01 PM
*Originally Posted by Alphaecho [+]
Technically it should yes as it has an O2 sensor which should adjust accordingly
The cb500 only uses a narrow band o2 sensor, so stable operations (e.g. warmed up idle, cruise and low load low throttle) are running in closed loop mode - out of those no o2 feedback, and no fuel trimsavailable for self correction.
Good news is, that pre 2019 bikes use a fairly rich base map for high loads, so they are safe for small mods like this.
I haven't seen afr plots of post 19 bikes, nor been able to read or write their ecus to confirm, but they also use the same velocity stacks for all markets.
I have been flashing earlier bikes many times, and some of the setups even requireeaning of fueling.