Noise in Yamaha G29 YDRE Motor

big mack

Cartaholic
I have a 2007 Yamaha YDRE G29. It had quit a bit of noise coming from the motor. I had the bearing and brush's replaced at a shop I have used when I needed motor work. They told me a brush was part of the noise and the bearings were rough. The noise has gone down but still some on and off. They told me the splines were wore down about half. Could that be the noise? Some one please help me on this.
 

big mack

Cartaholic
HotRod: I just took it for a test run it don't make any noise accelerating or going steady speed. when you let off it has a slight grinding sound
 

HotRodCarts

Cartaholic
the splines concern me because of damage to the input shaft.
De he say it was the splines in the motor coupler? Without actually hearing it it's hard to say but splines will usually make a rattling noise. Some carts are noisier than others especially when costing.
 

big mack

Cartaholic
The guy that repaired the motor said the splines in the motor coupler were worn down a half. I can see they are worn, one side is more than the other. The male splines on the input shaft are about twice of the motor coupler
 
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