Roast Posted December 12, 2013 Posted December 12, 2013 Hi all. I've recently bought over a XVS400 Dragstar Classic. Everything's good except there is this audible whine from the drive train whenever I engine brake. Sounds like a jet engine idling before take off (imagine saying the letter E in falsetto). It's soft when accelerating, loud when I close the throttle, and not there when I freewheel with the clutch in. Any ideas on what the problem could be? Oh another thing, I've no mechanical experience with a bike plus I don't have a garage I can tinker around. Most probably I'll be sending it down to the local workshop to get it looked at, just trying to get a few opinions before just so I don't look like an idiot and get ripped off at the shop. Thanks! Sent from my GT-N7105 using Tapatalk
slice Posted December 12, 2013 Posted December 12, 2013 Roast, Sounds like a bearing in the gearbox, probably the out put side, final bearing where the drive shaft exits the gearbox, might be a selector fork rubbing but that would be a bit of a scraping noise. Just my take on it , someone else might have a bit more of an idea.
Ttaskmaster Posted December 12, 2013 Posted December 12, 2013 Single the sound out and listen closely. Does it change in pitch as you accelerate at all? If it sounds a bit like a spaceship, then that is normal. Most V-twin engines do that. Couple of threads that may be of use:
blackhat250 Posted December 12, 2013 Posted December 12, 2013 Either of them answers" or primary gear [ bolts on end of crank] maybe loose,, it drives the clutch basket,, i changed a basket once , and the gear on basket mismatched [ thru wear ] the primary, sounded like a Screw compressor at speed,,
Noise Posted December 13, 2013 Posted December 13, 2013 Is it definatly from the drive train? and does it sound like this?
Roast Posted December 16, 2013 Author Posted December 16, 2013 Thanks for the replies guys. I'm gonna conclude the sound is normal as what noise and task mentioned. Just to be safe I'm still gonna ask the mech to have a look during the next oil change in jan. New development though. Have discovered a rattling when I cruise over 120kmph. Will have to spend time and check for loose bolts on my next day off. Bummer. Sent from my GT-N7105 using Tapatalk
Moderator Cynic Posted December 16, 2013 Moderator Posted December 16, 2013 Cruising at 120k on a 400 drag, pushing the limits of cruise I think. She is prob full chat at 130k, ease back a bit.
gizmo666 Posted December 17, 2013 Posted December 17, 2013 Is it definatly from the drive train? and does it sound like this? mines doesn't sound like that maybe its because i cant hear anything but the dam exhausts lol
gizmo666 Posted December 18, 2013 Posted December 18, 2013 every shaft drive i've had has got a slight whine to it the only time i ever experience excessive whining was cos it had no oil in it lol
Moderator drewpy Posted December 18, 2013 Moderator Posted December 18, 2013 Same here but I can hear a slight whine. that's the wife on pillion 1
Noise Posted December 18, 2013 Posted December 18, 2013 that's the wife on pillion More like the wife at home as she has no sense of adventure and doesn't want to go on the bike so that was my Que to get a solo seat
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