Maxchobi
Well-Known Member
I've found some educational video from yamaha EFI as introduction to this topíc. [ame="http://www.youtube.com/watch?v=fujeAFAjb4A"]Motorcycle Fuel Injection Systems video 1 by Yamaha Motor Corp. - YouTube[/ame]
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I am not saying not to do it, I just wouldn`t,I would rather have a bike running on the rich side than running too lean.Honda have been making motorcycles for a long time and I am happy to go along with their settings,especially on a stock bike.So it's not really worth the money just to have the stock bike with better fuelling. I guess if the modified maps take some fuel away, it will also improve fuel economy and throttle response.
I've attached a snap of the map DynoJet created for the stock 919. Seems to be a lot of fuel being removed. Apparently the Honda FI system also richens the bike up a great deal the higher the temperatures get
Honda have been making motorcycles for a long time and I am happy to go along with their settings,especially on a stock bike.
In some case`s I agree especially exhaust, but I don`t see what regulatory hoops would be used in running a bike rich I would think running the bike on the lean side would tick the box on regulatory hoops moreI've always been on your side of that argument, having faith in the factory settings being the optimal compromise so the bike will perform perfectly in any situation and with any rider.
The more bikes I own and the more I learn, I'm starting to see that it's not always the case. The manufacturers have to jump through a lot of regulatory hoops just to get their bikes on showroom floors and sometimes I think this results in less-than-optimal settings.
I still don't really know what the truth is but I appreciate your feedback
Since we're talking Power Commander, I have considered getting a PCIII for my 919. I'm not really looking for more power but the stock 919 is apparently quite rich and the PCIII maps from DynoJet try to remedy this. People say it improves response and smoothness as well as other benefits
Is it really worth the $275 investment?
Whittlebeast?
PS. 919 is completely stock & will stay that way.
So it's not really worth the money just to have the stock bike with better fuelling. I guess if the modified maps take some fuel away, it will also improve fuel economy and throttle response.
I've attached a snap of the map DynoJet created for the stock 919. Seems to be a lot of fuel being removed. Apparently the Honda FI system also richens the bike up a great deal the higher the temperatures get
I don't believe the PCV is available for the 919. With that in mind, what are your thoughts on the III?
Thanks for the feedback
Like Whittlebeast explained, it has alway`s been a big concern of mine in fitting a pc3 it would be very easy to do more harm then good by running the bike to lean, a killer of many a good motorcycle. the average biker just does not have the knowledge or equipment to tune a map and how do you know, who has or how the map`s that you down load are doneKeep in mind that there could be a few very well sorted base tunes for a 919. the problem is most tunes out there are junk and how will you ever verify that the one you just blew in is good.
Just ask for who ever is posting the map, what the target AFR map was that they were aiming for. If the answer is 13 AFR across the board, at least they have a clue what you are asking. Then ask them how long did it take to develop the midrange tuning, say at 3-5% throttle. Keep in mind that every 7% change on the base map implies the stock tune was about 1 AFR wrong. So when you see a -21% or a + 21 that is about 3 AFRs wrong. Ask them how they did the trailing throttle settings. Ask them how they did AE settings. If they give you a blank look on any of these questions, run.
Beast
Here is a webpage I have been putting together for a different site. Most of this can be done with the LCD-200 we have available to us on the Yamaha. This is the type stuff Marty is looking at on his bike.
***** geek alert ******
www.ncs-stl.com/tuning
Have fun tuning
for those u have already fitted a pc-3 or pc-v.....
let's say u have done all the mods(cat gutted,flies,slip-on,lars airbox,aftermarket air filter)....u download the map u want,u set/calibrate the throttle position sensor and everything is ok......do u have to adjust the afr target also?or this is selfsetting from the map u have download to the pc3/V?
http://www.powercommander.com/downl...orials/pcv_how_to_adjust_target_AFR_table.swf
First, those instructions are for people with a Harley with a Autotune/Wideband setup. Things are similar but a little different when you have the Autotune setup on a Yamaha.
Almost none of that applies without the Autotune/Wideband setup.
Beast