Hi everyone 
 
	I made a big mistake with YBR injector model 
 
	basically before I got my A license I had the YBR and wanted more power like u do.
 
	I purchased a engine with the big bore fitted to it and sold my old engine. 
 
	But once fitted the bike keeps  jerking when ridding and idle the reve counter jumping. I know now that the big bore is not ideal for the injector models.
 
	can anyone help me or give a stupid YBR owner advice please.