I'm fully aware that old carburetor motorcycles need to be warmed-up for about 5 minutes to get the correct fuel to air ratio. I'm also aware that motorcycles have a choke to rev-up the engine for warming up. I have seen many start their bikes cold and then they rev the throttle very hard before they use the choke if they do so...I personally have a Harley Davidson Sportster 48 and it is fuel injected. (No Choke) So I just start it and follow the owners manual by allowing warm up time to 2 minutes because it's air-cooled and then I take off carefully for a few. In colder weather (I only ride in New York State if the weather is above 50 F.) I warm it up maybe 3 or 4 minutes and then take off carefully for a few.
1) Is hitting the throttle hard (Revving) good for a motorcycle when first starting cold during the warm-up period? (Besides using the choke lightly)
2) Are motorcycles engines designed to handle excessive hard rev's when they are warmed-up? (Riding them hard and fast)
3) Is it wise to take off slowly or carefully for a few in order to obtain engine and oil expansion along with the proper engine viscosity?
4) Do brand new motorcycles need to be "Broken-In" or can one just ride them hard?
1) Is hitting the throttle hard (Revving) good for a motorcycle when first starting cold during the warm-up period? (Besides using the choke lightly)
No.
2) Are motorcycles engines designed to handle excessive hard rev's when they are warmed-up? (Riding them hard and fast)
They can handle the higher rev better than most cars. Look at the redlines for motorcycle, they are pretty high numbers, so you have a wider range for engine revving.
3) Is it wise to take off slowly or carefully for a few in order to obtain engine and oil expansion along with the proper engine viscosity?
Same as cars. You better be gentle with them till the engine gets to the operating temperature.
4) Do brand new motorcycles need to be "Broken-In" or can one just ride them hard?
At the end of the day, most cars and motorcycles have internal combustion engine. So, in order to keep them in a proper shape in a long run, you better follow the owner's manual recommendation for "break- in".
Thank You.