Rough Idle Yamaha Tracer 7

[u/Arlindoww349]

Hi everyone,

I’m looking for some help diagnosing an issue with my 2021 Yamaha Tracer 7 (CP2) with around 24,000 km / 15,000 miles.

Recently the bike has started behaving differently at idle.

Symptoms:
Idle has become noticeably less smooth/steady than before.
The bike occasionally stalls while idling.
It seems to happen more often when the engine is cold, although the idle doesn’t feel completely smooth when warm either.
The check engine light has now also come on.
Every time I start the bike, whether the engine is completely cold or already warm, the RPM briefly shoots up to around 3,000–4,000 rpm before dropping back down.
Once running and riding, the bike generally seems to run much better than it does at idle.
The battery also seems to drain fairly quickly if I leave the ignition switched on without the engine running.

I have checked the battery/charging system and the numbers seem healthy:
Engine off: around 12.6 V
During starting: around 11.0 V
At 4–5k rpm: around 14.0 V

So I don’t currently think the charging system is the main problem.

The bike has around 24,000 km on it. I’m wondering if this could be related to:
Idle Speed Control / ISC valve
Dirty throttle bodies
Throttle body synchronization
Vacuum/intake leak
MAP/TPS or another sensor
Spark plugs/coils
Injector/fueling issue

The high 3–4k RPM flare on every startup, including with a warm engine, combined with the unstable idle and occasional stalling, makes me particularly suspicious of the idle control/throttle body system.

I’m going to read the stored fault code before clearing anything.

Has anyone with a 2021+ MT-07 / Tracer 7 / CP2 experienced something similar?
What ended up being the cause?
And are there any specific hoses, sensors, throttle body/ISC components or common failure points you would recommend checking first?
Thanks!

[u/AutoModerator]

Thanks for posting in /r/Fixxit, the motorcycle repair subreddit. If you forgot to put the Make, Model and Year in the title, please reply to this comment with your bike's details. In the meantime, Here's some great resources for common problems posted here:

-Trouble starting? Revzilla - Battery testing

-Carbs running rough? PJ motorsports - Carb Troubleshooting

-Wiring diagrams for beginners - Dans MC - Reading Wiring Diagrams

-Identifying part numbers - CMSNL (EU) Partzilla

-Asking if your tire can be fixed? Please read this post on proper tire repairs and why external plugs are NOT a safe repair.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[u/Caldtek]

Whats.the servive history? Any mods?

[u/Arlindoww349 → u/Caldtek]

Normal service intervals according to the manual, no mods

[u/Caldtek → u/Arlindoww349]

When was it last serviced? Airfilter changed ? Due for valves? If its throwing a code read that i doubt anyone can give you a better idea than the cose will.