help with new BBk ---- please!

[micco]

Hi everyone,

Looking to the experts on this...

I have a 2009 tomos nitro 50 and just installed a 100cc kit...
What i've done...
- 100cc installed
- #90 main jet swapped - came with kit
- all stock airbox and exhaust

Scoot starts up, but under load it just bogs down, 2 min into the drive it just stalls out, has no power, etc

any thoughts or next steps?

I'm thinking too lean or rich...

cheers