Brand new FJR shuddering

Yamaha FJR Motorcycle Forum

Help Support Yamaha FJR Motorcycle Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
The 'span' of the TPS is fixed. The 'calibration' is setting the TPS to 15-17 (or ~750mV) while the throttle cam is resting on the idle stop. If a TBS were to be done poorly, such that the screws are topped or bottomed out causing the tech to have to take the idle stop adjustment to the limit then the TPS would be set to an erroneous idle stop setting. Still not critical but something the dealer has to take care of before Hawk signs off on the whole ECU project.
In fact Ionbean, I checked out again and at this time I got 15 and 101 instead 105!

In both situations bike was parked and the engine cold. Really odd.

 
Hey, nice way to keep the thread 'bumped' until our buddy gets us the CO numbers < ha ha>; just kidding. Interesting discussion. JC
ELP_JC

I got the numbers and they are 15, 33, 28 and 41.

Tech told me he wanted make sure the bike would be running within the specs if i am not wrong, about 3%.

So this numbers should be considered to my ECU only and just as reference....I bet yours could be different specially because you posted that your pipes were sooty as heck with less than that.

 
I got the numbers and they are 15, 33, 28 and 41.
Thank you very much buddy; really appreciate it. Those numbers are really interesting, mostly because they're more or less similar to stock ones (5,18,18,21), but bumped up due to the overly lean tuning required by the EPA. They're 10,15,10,20 (respectively) above stock. Interestingly, piston #4 was running the leanest, even though it had the highest number. And #2 was slightly leaner than #1 and #3, which are evenly bumped to 10 both.

As far as my 'sooty' bike, that might happen when it acts up, as they're known to run super rich when it's happening. I won't do anything to it until I get the ECU replaced (or reflashed), and go from there. At least we know now that the original settings are not that far off each other, which is what I wanted to know. Thanks a bunch again. Hope you're fully recovered by now. Take care.

JC

 
Top