Gen 3

[jason erbeck]

Cold start issues on gen3 Hayabusa. 2022 bike is stock except air filter, velocity stacks and Dyno tune by bt moto. Bike has run great for 5000 miles but suddenly it runs super rich on cold start. Problem is intermittent and clears out fairly quickly. Changed map sensor and seemed better for a month or so. But it happened again. I have carefully checked all the common suspect but to no avail. Any ideas would be appreciated.

 

[Bumblebee]

I noticed this is your first post...welcome...

There is an entire thread on the hot start issue...maybe the two are linked somehow...

hard start | Gen 3 Busa Information

i experienced a hard start issue. its annoying and ive been able to recreate it. i first noticed it when i let someone ride it and they stalled it. then when they tried to restart it but hitting the start button (without cycling the key.) the engine is slow to crank and sounds as if the battery...

www.hayabusa.org

 

[Hayabusa Wannabe]

Welcome to the forum. Sorry to hear about this issue with a newer bike.

 

[jason erbeck]

Cold start issues on gen3 Hayabusa. 2022 bike is stock except air filter, velocity stacks and Dyno tune by bt moto. Bike has run great for 5000 miles but suddenly it runs super rich on cold start. Problem is intermittent and clears out fairly quickly. Changed map sensor and seemed better for a month or so. But it happened again. I have carefully checked all the common suspect but to no avail. Any ideas would be appreciated .

Cold start issues on gen3 Hayabusa. 2022 bike is stock except air filter, velocity stacks and Dyno tune by bt moto. Bike has run great for 5000 miles but suddenly it runs super rich on cold start. Problem is intermittent and clears out fairly quickly. Changed map sensor and seemed better for a month or so. But it happened again. I have carefully checked all the common suspect but to no avail. Any ideas would be appreciated. The bike has 7000 miles on it and was tuned at 600 miles. It has never had a trouble code which seems weird because it runs terrible for a short time. Hopefully someone out there has had a similar problem getting desperate. No one in northeast seems to know much about the gen 3. This forum is new to me so thanks in advance.

 

[Hayabusa Wannabe]

Was it tuned with a Power Commander or such (or ECU flashed)? If yes, disconnect any fuel controller and see.

 

[jason erbeck]

Was it tuned with a Power Commander or such (or ECU flashed)? If yes, disconnect any fuel controller and see.

It was ecu tuned and has been running good for miles wouldn't think map would change and I am not sure they change cold start maps.

 

[Hayabusa Wannabe]

The problem does not happen to align with a particular fuel station?

 

[Hayabusa Wannabe]

This looks the same:

Fuel running issues on new gen3. | Gen 3 Busa Information

Recently I had my 2022 busa in for a running issue, it ran rough when cold , could smell fuel like it was flooding, when warm it ran rough ( sluggish throttle response) at low and mid range acceleration. After doing the 12k service where plugs were replaced with new ones, the problem...

www.hayabusa.org

 

[jason erbeck]

The problem does not happen to align with a particular fuel station?

I was wondering this myself more about the ethanol content it seems to happen on wet cold days as I live in New England. I just started to add iso- heet additive. Maybe it is sensitive to water once it warms up a bit it runs perfect,never pings and has good power. Wondering if the water settles to the bottom. Thanks for the input

 

[dadofthree]

Welcome, had this issue. It healed itself or possibly went away when I changed the spark plugs. Not positive

 

[jason erbeck]

Welcome, had this issue. It healed itself or possibly went away when I changed the spark plugs. Not positive

What plugs did you use for replacement? I changed mine at 6000 miles and used ngk but had a terrible time with finding the stock plug gap, can't remember what I went with. Thanks

 

[sixpack577]

FYI
Suzuki still uses their stupid clutch switch design.
Where the a/f map changes from neutral, to a particular gear every time the clutch engages/disengages.
If you disconnect the clutch switch, then the bike stays in the Neutral map.
The way to defeat a faulty switch(other than replace it), or if you just want the clutch safety gone, then a relay needs added inline with the clutch switch.
The relay will trick the ecu into thinking that the maps are correctly switching between neutral and gears.
I have done this before, and am about to again, as I put an ASV clutch perch on my Gsxr1k.
I am also not saying that this is the problem.
However, I am just putting the info here in case the problem persists, so that the clutch switch can be tested, and eliminated as the problem, or that it unlikely, but possibly, could be contributing to the problem.

 

[dadofthree]

What plugs did you use for replacement? I changed mine at 6000 miles and used ngk but had a terrible time with finding the stock plug gap, can't remember what I went with. Thanks

CR9EIA-9 iridium plugs, you don’t want to check the gap. Preset anyhow. You don’t want to damage the plug. You’ll understand if you buy a set.

 

[dadofthree]

 

[jason erbeck]

Just changed plugs again and checked the cats. Getting ready to put stock map back in it. Very frustrating. Thanks for the help

 

[Bumblebee]

Just changed plugs again and checked the cats. Getting ready to put stock map back in it. Very frustrating. Thanks for the help

That's a lot of plug changes.........

Hopefully it gets sorted out....

 

[Oz22]

There is a big heads up here for us riders who are not expert mechanics or are racing our bikes, leave the engine alone! No need to spend thousands trying to eek out a few more HP, just enjoy trouble free riding instead. Anything needing a dyno is a roll of the dice as far as future problems go.