Boyesen water pumper cover and impeller?

[rider_671]

Does anyone know from expeirence or heard if the the Boyesn water pump cover and impeller actually makes much of a difference on a Yz125??

 

[anton]

Impeller

Only MXA who said that believe it or not, the bike pulled a higher gear and seemed to rev more freely.
Regards
Anton

 

[yardpro]

if mxa said it take it with a grain of salt