I have two CS-370's and they are my "go to" saws for small work here on the property. The one that rides in my quad basket has about a zillion hours on it, FLAWLESS now for quite a few years. I use it and my CS-360T all the time trying to get them to develope a "death rattle", which to date hasn't happened. Both are stone stock except the CAT's are removed from the muffler and 4 holes drilled in the "can" with the exit hole opened up slightly.
The CS-370/400's have PLENTY of power for the cc's, but not a high rpm design, more of a mid-range design, but well suited for limbing and small stuff......Cliff