The term "KTM" and "KTMs" refer to the same motorcycle brand, KTM. The difference lies in the plural form and the use of the letter "s" at the end.
"KTM" is the singular form and refers to an individual motorcycle or the brand itself. For example, you might say, "I own a KTM motorcycle" or "KTM produces high-performance bikes."
"KTMs" is the plural form and is used when referring to multiple motorcycles from the KTM brand. For instance, you might say, "There are several KTMs in the race" or "He collects vintage KTMs."
So, essentially, "KTM" refers to a single motorcycle or the brand as a whole, while "KTMs" is used to indicate multiple motorcycles from the KTM brand.