How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Matt Your Own Question
Matt, Engineer
Category: Motorcycle
Satisfied Customers: 21603
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
Type Your Motorcycle Question Here...
Matt is online now
A new question is answered every 9 seconds

My 2009 Harley Trike has a vibration in 4th & 5th Gear at

Customer Question

My 2009 Harley Trike has a vibration in 4th & 5th Gear at 2800rpms at 50mph feels sound like a rumble strip noise but not as loud.????
Submitted: 10 months ago.
Category: Motorcycle
Expert:  Matt replied 10 months ago.


I'd 1st check that the driveshaft isn't out of alignment. So check that the U-Joints are properly aligned, as they have to line up with each other or it will vibrate some

if thats OK then check that the wheels are correctly balanced and one other thing to check for which isn't covered by a balance check is out of round or bent wheels, if you use a dial gauge on the axle to measure the run out on the wheel rim this will ensure that the wheels are round and true

Customer: replied 10 months ago.
Drive shaft ??? U joints???
We are talking about a belt driven trike correct???
Expert:  Matt replied 10 months ago.


Ok yes but there are a pair of driveshafts running to each wheel?

unless you have the live axle version of the trike but that should be an earlier year