Pinging when on the thottle.and a wineing noise from lower end

Beings you DIDN'T give a YEAR (so I don't know if it's a carb or injection), I can only give generalizations.

Pinging in internal combustion engines occurs when air/fuel mixture in the cylinder has been ignited by the spark plug and the smooth burning is interrupted by the unburned mixture in the combustion chamber exploding before the flame front can reach it. The engineered combusting process ceases, because of the explosion, before the optimum moment for the four-stroke cycle. The resulting shockwave reverberates in the combustion chamber, creating a characteristic metallic "pinging" sound, and pressures increase catastrophically.

Some of the possible causes:

The hotter your engine is, the more likely your engine is to ping. The farther your timing is advanced, the more likely your engine is to ping. The higher your compression ratio is, the more likely your engine is to ping. The lower the octane of gas you use, the more likely your engine is to ping.

As far as the whining noise, does it sound like a chain noise?
Again, the causes/fix depend on what YEAR your bike is.