2 stroke vs 4 stroke

2 strokes are simpler, less moving parts than 4 strokes = less maintenance/repairs and less costly rebuilds.

4 strokes have longer intervals for rebuilds and when comparing same size engines, get better mileage.

2 strokes require mixing gas with oil, 4 strokes do not.

2 strokes have a tendency to have most of their power in the mid to top of the rpm range.

4 strokes have a tendency to have a more linear power delivery.
 
2 strokes require mixing gas with oil, 4 strokes do not.

Not true. There are 4 strokes that run on premix. But them are mainly found in things like chainsaws. They are run on premix so the can operate from a large amount of angles. But when talking about ATVS and quads. 2 strokes use premix. 4 strokes don't.

Also 4 strokes have more timing setup and valves, cam, and more piston rings. 4 strokes tend to last longer but are more expensive go rebuild. 2 stroke don't last as long(but that is also part of the people who own them, not categorizing but it's true for some).

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Not true. There are 4 strokes that run on premix. But them are mainly found in things like chainsaws. They are run on premix so the can operate from a large amount of angles. But when talking about ATVS and quads. 2 strokes use premix. 4 strokes don't.

Also 4 strokes have more timing setup and valves, cam, and more piston rings. 4 strokes tend to last longer but are more expensive go rebuild. 2 stroke don't last as long(but that is also part of the people who own them, not categorizing but it's true for some).

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2stroke Detroit diesels don't use premix either, but this isn't a tug boat or chain saw forum. However I did not know that fact about the chain saws though.
 
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2stroke Detroit diesels don't use premix either, but this isn't a tug boat or chain saw forum. However I did not know that fact about the chain saws though.
Not all chain saws are 4 strokes and in fact most small engines like that are 2 strokes. But I believe Honda has made a 4 stroke that runs on premix and uses no engine oil. And they used it for things like their winch that can be mounted to anything

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Noisy bastards too! Lots and lots of noise.
we had one in a w900a with twin sticks, it would haul ass empty but the moment you asked it to tow something it became a 50 mph truck. And thats why it was never turned into a tow truck as intended, also probably why my dad's hard of hearing now
 
kind of a driver thing where the two strokes were concerned. i still have all my shop manuals, worked on many, didn't want to keep any of them. toss everything you think you know about two strokes if you want to work on them though. hell, just toss everything you ever thought you knew if you are like me and first set wrench on one when you were 23. impressive by the power they put out and what they weighed though. the design on the 53 and 71's which were so common really was from the 30's and when you considered what anyone else was building then, and you were a trucker who wanted payload and power, they had a reason for being. most of you never touched the 110's the 149's or even knew you saw them as they didn't get on the road much. you would have realized what noise really was though. 92's, penske, and the epa were the death
 
ours was a series 71 v8. I never worked on it, but I remember being quite fascinated by the howl that thing made running down the freeway. Oddly enough that truck ended up resting in someones back yard not far from here. Drive by it every once in a while
 
That one was a dry sleeve design and was the most water tight of them all. 53's and 92's had wet sleeves and o rings. They sent some of the 71's with aluminum blocks
 
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