Hi I have an Buell xb12ss 2009. 6700km on the meter and have just done the 8000km service.. New sparkplugs and everything!

But it runs uneven when i start it, and if you dont give it some throttle it dies! And if you give it throttle and you drive away its very twitchi and it backfires a little.
Its new gasoline in it, so thats not the problem.

I have tried to do a TPS-reset but dont think that i did it right or that it wasn't the problem..

What can be the problem?

Best regards

The Swede

I have tried to