Hey guys, i thought that would be very usefull for me and for many many people here.

The problem is that when a man going to buy an engine, he is looking at specs, right? BUT WHERE exactly is he looking? I'll tell you. Torque and top rpm. Well, the guys who don't know what the other things in specs are (like me), that's we are going to find out.

Well, we need an example and to make that thread twice usefull for me, i'll put the specs of an OS SPEED .21 VZB-R Vspec:

SPECIFICATIONS
Stock Number: OSMG2081 X
Displacement: 0.211 cu in (3.46 cc)
Bore: 0.653 in (16.6 mm)
Stroke: 0.630 in (16.0 mm)
Practical rpm: 3,000-40,000
Output: 2.5 hp @ 34,000 rpm
Weight: 11.3 oz (320.5 g)


The specs are from www.osengines.com

The specs with the X ignore them.

Well. From that chart i post, the only things that i kinda know are:

Practical rpm: That engine can run between 3,000 - 40,000 (the 40,000 is the top)

Output: Now that's what i want to know. When it says "34,000 rpm @ 2.5 hp", it means that untill that rpms it have that torque?

Weight: i think thatis cleared. It says the weight of the engine meausured in ounces and grams

NOW WHAT ABOUT THE OTHERS. Please, if you are not sure on what you are writing, at least write the words "I THINK" [)]