I believe its 87 stock, (idling next to my car it sets off the car alarm) most aftermarket exhaust systems will put you close to 95, with some municipalities imposing noise ordinances of around 96db. Many high performance exhaust systems are over this but may include a 'silencer' insert that brings the levels down to legal (or close to legal) limits.
The Yamaha Raptor 660 is a single cylinder.
70-100 decibels
If I'm not mastacking it 2
3
120
The iPhone can produce a maximum of 100 to 115 decibels.
The Yamaha Raptor 660 takes 3 Quarts 4-Stroke Oil or 10w/40.
64 watts = 18.1 decibels. If by 'set' you mean you have two 64 watt speakers then they will create 36.2 decibels.
The Yamaha Raptor 250 needs about 1.8 quarts of oil when you are completing an oil change. It is a good idea to have a funnel handy because it is difficult to get the oil into the fill area.
There is a few generators that will produce less than 60 decibels. That is about the same decibels as background music. These are good to use if you live in an apartment or have very close neighbors.
get 4 quarts the quad will hold a lil over 3.75
absolutely not Yamaha is a far more durable brand i have had many of both and Yamaha is the brand that holds up better