WaterPump Nut

[parillaguy]

Another tid-bit from one of the RC390 Cup guys. Apparently, the nut holding the waterpump impeller on is not of the locking variety. With hard use they can back off the shaft. AMA Cup guys were told to replace the nut with a locking version. This is a relatively ease fix as the cover comes off easily enough. parillaguy

 

[tecknojoe]

Nice, thanks.

 

[ryandalling]

Have a pic of what you removed and what you replace it with?

 

[sturge]

good info...wonder why wouldn't they have considered reverse thread as part of original design?

 

[Wa2fst]

Just heard the same the cup guys are also just lok titing them if they didnt replace