Bullet Train Engine whirring noise driving me crazy. PLEASE HELP

[chrisallen]

Hello Everyone,

I just completed a build using a BBR bullet train engine. The only problem if it is one is a whirring noise from the engine. This noise only happens when the throttle is engaged so i am guessing clutch. The noise gets louder as it goes faster. Very annoying. Hope somebody knows something about this
Thanks
Chris

 

[Spare_Parts]

Most likely just the bevel gears and it's normal.

 

[chrisallen]

Most likely just the bevel gears and it's normal.

Wow really? I hope it gets less
Thanks