Question about Yamaha Road Star Motorcycles
Jim, I suggest you stay away from "friction modifiers". Oil additives are snake oil and not one has ever been proven to have a greater effect than simply changing your oil. An additive might make the noise go away, but putting 130w gear lube in the engine might make it go away too, with some rather harmful side effects.
As far as changing to synthetic oil, it will not harm the bike in any way, shape, or form. The main benefit to synthetic vs conventional oil is the ash content. Synthetic has none, conventional has minute amounts. Use whatever brand you like and weight appropriate for the temperature range you will be riding in.
If the Yamaha mechanic and corporation are telling you the sound is normal for your bike you can either learn to live with it or find a mechanic / machine shop to figure out what component is making the noise and have them re-engineer the offending part so it does not do that. It would probably be cheaper to buy a bike that doesn't make the noise.
Posted on Jul 19, 2009
THIS IS MOST LIKELY A NOISY BEARING OR BUSHING, ADD A BOTTLE OF "FRICTION MODIFIER" TO THE OIL (AVIL AT ANY AUTO PARTS STORE), ALSO USE SYNTHETIC OIL, IF THIS DOESN'T SEEM TO AFFECT THE NOISE YOU HAVE A HARD PART FAILURE AND THE TRANS WILL NEED TO BE TAKEN APART TO FIND THE PROBLEM.
Posted on Jul 17, 2009
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Posted on Jan 02, 2017
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