Denverdean1
XS400 Member
Im the new owner of a 79 xs400, I've been working on it for the past few weeks and finally got it to run. I took it out for a test drive and noticed it makes a grinding noise, almost like gears grinding. It's not consistent and happens every couple seconds sporadically. I think its coming from the gear box, not positive though. It shifts fine and when riding at low rpm in any gear the noise is not there. Once I accelerate it starts. I lifted the rear tire off the ground and accelerated through all gears and it didn't make the noise. Im not very familiar with the bike so just wondering if anyone else has any input. I don't want to ride it anymore and damage something.