If you do it is small increments and keep track of how much you turned it you should be okay.
Uncorked the bike, now bike dies
Posted May 21, 2015 - 06:12 AM
I asked the same question about the catch tank when I picked up my bike (2015 WR450F) and got the same answer. Just checked my service manual (page 3-17) and there is no mention of coolant in the catch tank. The SM says to check the coolant on a cold engine by removing the radiator cap.
Posted May 21, 2015 - 07:39 AM
I read the FAQs and the performance mods section for the bike but cannot find what I was searching for. Is there a link or a thread that describes the range of options for performance upgrades for the WR450F? Does Yamaha have a tuning guide for the bike? I see they sell lots of parts but have not found a refernce to a tuners manual. I have not ridden a serious dirt bike in 38 years so don't plan on any immediate changes but I would like to understand the options.
If I understand correctly, I need the competition ECU to get the YZ throttle stop screw (unless I can find the part number somewhere) and to use the GYTR tuner to change maps. The competition ECU does not provide any performance change; it just allows the use of the tuner. Is that correct?
Some other questions:
- If I uncork the bike, is it possible to go back to stock exhaust setup by putting the parts back in (knowing that I will have to re-adjust CO)?
- Will I get performance improvements if I change maps without uncorking the bike? Am thinking that I should add performance in small increments as my skills improve/ return.
Posted May 21, 2015 - 11:15 AM
You have to un-cork, and re-ecu with a re-map if you want it to run at the right temp, and not stall or overheat.
This is the way it is.
Re-mapping is not a 'performance' upgrade past the input/output flow of the motor. It's just how you correct poor A/F ratios, just like jetting.
In otherwords, you will get the A/F ratio correct, and if you vastly upgrade the head, exahust, or intake, you re-map to correct your now incorrect A/F levels.