Nifty Posted January 2, 2015 Share Posted January 2, 2015 After 6000 kms my bike has developed a slight vibration in 4th gear at 60k's and 5th gear at 80k's - what could be causing this? Any help would be appreciated. Link to comment Share on other sites More sharing options...
Moderator DirtyDT Posted January 3, 2015 Moderator Share Posted January 3, 2015 Moved to workshop. Link to comment Share on other sites More sharing options...
slice Posted January 3, 2015 Share Posted January 3, 2015 All bikes vibrate, some all the time others in very specific spots, my fairing rattles at about 32mph cos the plastic is worn from it being 20 odd years old, you have just found the sweet spot on yours so see if you can work out where it's rattling then tape it or use rubber bungs to damp it down, trouble is tho that if you cure one rattle it rattles some where else usually. Link to comment Share on other sites More sharing options...
Campaman Posted January 5, 2015 Share Posted January 5, 2015 Mine has a distinct vibrate at a certain revs in each gear, think they all do it Link to comment Share on other sites More sharing options...
Noise Posted January 5, 2015 Share Posted January 5, 2015 Yer mine vibrates too so i wouldn't worry too much about it unless its the engine mounting bolts in which case you might find a sudden lack of power and weight reduction Link to comment Share on other sites More sharing options...
Ttaskmaster Posted January 5, 2015 Share Posted January 5, 2015 I assume it's new, in which case the bike is just starting to break in... or if it's second-hand then possibly the vibes have always been there and you're just noticing as you become more familiar with the bike. Either way, it's perfectly normal. It's a V-Twin, which is a bit vibey anyways. Might be you're hitting the top (or maybe idling at the bottom) of the power band. I'm trying to remember how I managed my own 650's gears... I don't think I clicked up to 4th until at least 60mph (96km/h), in which case that'd be low rev idle causing the vibes - You're hitting 4th gear around 37mph!! Try adding more revs and learn at what speed the bike starts to struggle for each gear, then change up 5-10mph earlier. On a bike like this, you generally want to ride comfortably within each gear's power band. Link to comment Share on other sites More sharing options...
Campaman Posted January 6, 2015 Share Posted January 6, 2015 Around town (30mph limit) 1st and 2nd will do, 3rd at the most so as Tasky says 4th at 37mph means you are changing up far too soon. The 650 revs up to around 6500 rpm with maximum torque around 3000 rpm so you need to be adjusting you changes to suit, its not the same as the bigger engine stars such as the 950 which revs to around 5600 rpm Link to comment Share on other sites More sharing options...
Ttaskmaster Posted January 6, 2015 Share Posted January 6, 2015 However, since there is no rev counter, you'll just have to do it by noise and feel... which means more riding!!! Link to comment Share on other sites More sharing options...
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