2011 TE449 Running well with factory EFI system - finally

Hey Thrasher and Dangermouse - did you remove the FBW butterfly before or after PCV install and Map update ?

Ford40 - sounds like you will have to invest in a PCV like everyone else - without it they run horrible

I'm running stock front 15 with a 44 rear, super moto 17" wheels. Top gear I can easily cruise 60 mph at half throttle. I haven't wound it up yet, only have 300 miles on the bike so far. 14 TE511. Compared to stock 51 tooth rear, this is a vast improvement, meaning lower RPMs at higher road speeds. Don't have an RPM reader thing, so can't say precisely, only that it's very noticeable improvement. I had to remove a couple of links of chain. No problem.

This vacuum nipple... still looking for it. The photo I saw wasn't clear enough for me. Is this where the hose attaches to the throttle body? Well, when I visit, I'll cover all of this stuff hopefully.

i reckon you should call First Class Lilydale. They are pretty good with the Kymco Engines. They have done many repairs and tunes to other bikes. Just as i said earlier hier with the TE449 which wa used racing.

Long weekend coming up.. MAny of us will go for a ride. Lets see how you all go with the minor modifications .

On my 511, i did have map3 installed , fmf PC4 , run in with 2000km. , Airfilter lid open as on US TC model.

could someone do specific manual to remove without problems FBW and secondary butterfly?
Just in case of... like a guide..

go to the first one or two pages of this topic... it's all there.

Remove Rubber boot from Throttle Body to gain access to the upper Butterfly. Take Phillips head Screwdriver and Remove 2 screws and take out Butterfly out.

I had PVC before butterfly removal. I believe Dangermouse does not have a PCV at all.

very interesting - even after the massive improvement of a PCV and tune you them gain another massive improvement with the FBW butterfly removal - so anyone else done this modification ? sounds like a no brainer

I reckon mine is revving too high in top gear at 100 km which is motorway speed here even though I try and avoid them. For the race track it would run out of legs one third to half the way down a short straight

Please forgive my ignorance on this subject. But, out of curiosity, does this render any piggy-back ecu gizmos useless, and for that matter the ecu itself? I.e. don't the piggy-back map overrides just change how much the butterfly is open at certain rpm/throttle position? By removing it, the fuel injection becomes completely throttle position dependant? Just trying to figure out the mechanics behind it.

No. The piggy back systems change how much fuel the fuel injector is injecting at a specific rpm and throttle position. The PCV gets throttle position from the primary butterfly, and the JD I believe just 'guesses' the throttle position based on the voltage going to the injector.

You might need to start reading the thread from the beginning because it can be a bit confusing. The butterfly we're talking about is a second butterfly. It can be removed without effecting your PCV or whatever else you're using.

I don't have a PCV, but I'm fairly sure the ECU I ended up with has map3-(not my original ecu after warranty work).
I 'll have the dealer confirm this soon, actually.
The butterfly removal made the most difference in how the power arrives, anywhere in the range, if you crack it open, it surges forward, proper 450cc power!

I am not anti-PCV, the reason I set out on doing these mods was to see if it was possible to get it to run right without adding systems on.
It is at about 95% to where I want to be with it & still have another couple of cheap fixes in mind.
I have just got an A/F ratio meter kit so I see the changes I make,
These thing will take me a little while to nut out though, but I'll post them up, stay tuned.

It will give people with the skills a choice, buy something with a known outcome or cheaper DIY solution.

None of the 'piggy-backs' control the second butterfly (My reason for removing the idle arm system).
The bikes' own ECU controls the FBW butterfly.
You may find you need different map adjustment for a JD/PCV/Bazzaz etc if you pull the butterfly, especially if they have been auto-tuned I would think, as they have been mapped around the restriction of the second butterfly.
Can't say for sure, as I don't have one, but that's how I see it.

Cool, Motosportz & thanks for the update.

Interesting to see how open your butterfly was, mine was quite a bit more closed than that on inspection.
Very interested to hear your thoughts after a good ride, as mentioned earlier, there may be some trimming of maps to do on a bike with a tuner box added in.
Enjoy the 'new' snappier bike!!

Ummmm.

So I did the removal, installed the ecu with race map III, and changed to a iridium spark plug and oil change

Bike ran for a bit then I blipped the throttle and it died...hmm that's weird.... crank crank crank crank crank crank. nothing not even trying and throttle doesn't help.

So I let the oil level drain to the bottom of the sight glass (maybe I over filled it?) no help.

So then I reset the auto tune and PCV to 0 on everything. Crank crank crank crank crank crank no start.

Then I remove the airbox/boot and crank crank crank give it 20% throttle crank crank run and runs just fine....then it dies.


Then I pull the plug and it looks....brand new no problems and not fuel soaked.

Any ideas before I go crazy?

I re-loaded the nick burson map to the PCV and auto tune.

Also got the battery on charge as it got really low towards the end...