Signs of Lean?

Vibration, harshness is usually noticeable if the motor is running lean, other signs..... the bike feels quicker early mornings or late evening,
rolling the throttle off and then snapping it open at different points in the rev range, if the motor bogs its probably running lean

If you're running my map, you're definitely not running lean.

With the Akra map look for signs of rich: sooty exhaust, smell of unburnt fuel, etc. I had a DNA filter (standard air box) Leo Vince slip ons and the Akra map. It ran very rich. Here are the before & after AF ratios from the dyno runs:



When time and money allow, I highly recommend you get a dyno map. My bike ran so much stronger it was unbelievable. As an added bonus, it also got much better gas mileage as well.

look at your spark plugs

What Bert said might be a good option if you can't find a tuner at all. You might want to check if there's a Triumph specialist/tuner since they might use TuneECU as well.

Best thing on short notice is to get your bike on the dyno and ask them if they can look if the bike runs lean or not so not just looking at full throttle runs. This gives you an idea if you're at least safe to ride until you find a good tuner.

Easiest way to determine if the bike runs (way) to lean is to check if it simulates a bumpy ride on a smooth surface with constant, low speed throttle. Expecially on a dyno you'll notice this much more but then there's a A/F meter as well.

Like suggested in a previous post, clean the inside of the end-cap of your exhaust when the engine is already warmed up. Then ride as you usually do and check again if it's slowly turning a bit black again. If it stays perfectly clean, it's too lean.