Took carb apart and cleaned jets now it is really hard to start and ba

"@blc1983 your Yamaha should have either a Teikei Y26P or a Mikuni VM28. when you cleaned it I suppose you did not use new jet’s but kept the old ones. Also let us know if you by any chance used a carb rebuilt kit. My number one suggestion would be to try and adjust the carb.

Take a look at this Mikuni manual for adjustments etc. Mikuni VM28, this one for Yamaha TT-R Carburetorstock carb as well as this video"