Sounds like timing chain, higher pitch gear noise.
Sounds like timing chain, it's a higher pitch gear noise. 80,000 miles on bike, I recently purchased. I have no manual, and I'm smart enough to do the work myself with proper direction, but too poor to pay the local dealership. I hope purchase a used shop manual if I can find one. I'm an old fart, but this is a new bike to me, I would appreciate any wisdom on this matter.
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Re: sounds like timing chain, higher pitch gear noise.
Common on high mileage bikes, chain tend to stretch over years and get very sloppy. you might also want to check the gear making sure is not worn, worn gear will chew your new chain up quickly. check your timing belt also, it good idea to also replace.
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Describe the sound; a low clunk, higher pitched tap. Does it increase with engine rpm? Noise that is present on deceleration is often in your valve train, cam chains particularly. Noises that getter louder as the bike gets hotter can mean the type and viscosity of the oil is too "thin". Write back some more symptoms. Good luck, it's an awesome bike
Without being able to stand next to the machine and listen it would be very hard to say what the noise is. Valves are generally easy to adjust and if loud have a high pitched tick sound. Cam chain adjusters generally self adjust and are reasonably quiet. If the automatic adjuster goes bad it will generally make a clatter sound or a loud clack. One thing you have not considered, if the the exhaust gaskets in the head go bad or leak air, they can also produce a loud ticking sound. You often hear this sound in older V8 engines. It sounds like a lifter is bouncing around inside the motor but the sound is caused by a blown gasket between the head and exhaust manifold. If you experience some popping/backfiring during deceleration try replacing your exhaust o-rings in the heads. This may solve both problems. If the problem is internal to the cylinder you may need to change a bad cam chain adjuster. As always start with the cheaper fixes and work your way up. Adjust valves and cam chain tensioner if not self adjusting, replace the exhaust gaskets next, and if that does not fix it, replace the cam chain tensioner. Hope this helps.
I'm sorry but there is no chain in a Harley transmission. The only chains on your bike is in the cam chest of the engine. They drive the two camshafts that operate the valves.
Now, most of the time when riders complain about a "chirping" noise when they shift gears, it's because the final drive belt is too loose. It will make a noise every time you shift a gear, up or down. Check the tension on your rear belt and see if that helps.
Normally when replacing gears in a gearbox, bike or car, the meshing must be checked to ensure that it is within specificatiom If the play is too great, the mating gear is normally replaced at the same time. A humming noise sounds like a mainshaft or layshaft journal bearing is damaged. If it was a HarleyDavidson or British Bike, it will probably go on for a number of years as they were built to last. I don't understand why the gearbox would need repair if it was a chain problem!
Being a Japanese bike and a recent repair, I would get it checked out with an authorized dealer.
If the bike has knobby type (bumpy tread) they do make noise.Just be sure they have the correct air pressure in them.
Try to support the bike so you can manually spin the wheels like if the bike had a center stand.Feel while turning, to see if the wheels feel to tight or loose.And try to feel any play in the wheels. Or hear any stange noise.
While your are at it go ahead a drain the oil and change it with a good quality oil. The bike should have come with a book to tell you what type oil it wants.Dont be afraid to change the oil more than it is suppost to be.They dont hold that much oil and the shifting of the gears will generate alot of break in metal dust that needs to come out of the engine.
To say if you made a mistake in buying the bike remains to be seen because their is no history of the Chinese bikes in this country.
If I could ride the bike I could give you a better opinion.
Another thing you could do is, while riding the bike with it makeing the sound,pull in the clutch and put it in neutral.Is the feeling gone?
This can help to be sure the noise is not engine generated.
That's a load of **** they are feeding you.The timing chain tentioner has a fault and not tentioning the chian.I think you have done a good thing keeping it on synthetic oil.That causes less wear on moving parts than other oils.