Poor Fuel Economy, Even After New Emulsion Tubes

[TDMberlin]

Thanks for all the responses.



I ditched the Vacum operated fuel pump as it wasn't original and the PO said it was from a Go-Kart. On the Highway at .... 80-100mph the bike would porpoise, slow then accellerate as the float bowl emptied and filled. Basically the pump couldn't deliver enough fuel. I got the pump from AMAZON, advertised as for a R6 and 535 Vriago. 2-4PSI pump and as soon as the flat bowl is full it will turn off.



The Bike rides great and after faffing with the jetting (different mains and the needle clip position) it rides nicely. 



That it requires little or no choke to start it is probably the issue but i did replace the Choke plungers, perhaps where they seat is past its best???



Apart from the TPS, how are the 4TX carbs different?

 

Thanks Again



Chris