last development in two stroke engines?

Answer 1

I'm sure that this wasn't the most recent change. Some are fuel injected and others use slide valve carburetors. They are used in conjunction with reed plates bolted to the crankcase instead of the intake ported motors. The ignition systems are so fine tuned, by the flick of switch the engine will run in reverse rotation. This enables snowmobiles to move backward. The ignition systems advance curve is retarded when this takes place. Pistons are made from a proprietary material which allows tighter clearances. This helps to keep the piston rings perpendicular to the cylinder wall. Engine company's can see the hand writing on the wall. The Fed's are seriously tightening up emissions. I hate to see it happen but in a few short years 2 cycle motors may be a thing of the past. I love them all, weed whackers, chainsaws--some Husqvarna saws rev. to 14,000 rpm's. No 4 cycle will ever work on a chainsaw, just my opinion.

Answer 2

No, we haven't seen the last of the two stroke. But as they relate to production motorcycles we'll only see them in the form of off-road bikes.

EPA/CARB standards exclude closed course machines, to that end Yamaha and KTM have publicly announced they will still be producing 2 stroke race bikes into 2009 and beyond if sales support it.

Before Polaris bailed on the watercraft market they had a muti-cylinder two stroke engine that passed the EPA standards.

The 2 stroke of the future will use materials in the piston and cylinder that allow for much leaner mixtures, maybe even sealed big end and crank bearings. Oils that allow reliable mixtures as lean as 100:1 will need to be developed.

Back in the 80's Honda used a CR250 based bike to create a desert racer called the EXP. Al Baker rode it to a class victory if memory serves. It used some of the technology I've mentioned but was shelved at the time due to cost efficiency issues.

The thing is, with regards to off-road race engines, any well maintained two stroke will hold it's own emmissions wise against the vast majority of the four strokes on the starting line at race tracks across the country. Most thumper riders will replace stock exhaust systems, air filters and re-jet accordingly. At that point they are as "dirty" as a two stroke, are louder, and make the kind of noise that carriers further than a typical two stroke.

The misconception of emissions are spawning the re-emurgance of the four stroke race bike. The loss of riding areas and race tracks due to noise will be it's un-doing.

Answer 3

i think of in the experience that your going with 30-40 ft boat you will desire the 4 stroke! You wont locate many 4 strokes on a bass boat and you wont locate many 2 strokes on a pontoon. Your 4 strokes have the skill to tug a load around the water, a 2 stroke has the fee like what you want on a bass boat yet does'nt have the skill you desire for the 30-40 ft boat. speed verses skill is the version.

Answer 4

i ride dirt bikes and currently own a cr 250 2 stroke and i have ridden 4 strokes but they have no power compared to the 2 stroke
you may have to replace the cylinder ofton if you don't run it rich enough but it is all worth it

Answer 5

why do so many people answer questions, they dont know anything about? a 2-stroke 350 chevy?, a 2-stoke rotary engine? come on people. use the dictionary and look it up and learn something.

Answer 6

hell no it ain't. I am proud to say I will keep all my 2-strokes going and develop new ones. I have 2-stroke 350 chevy engines available, dirtbike motors, snowmobile motors, you name it

Answer 7

Mazda produce a rotary engine.....this is a twostroke motor..

there are lots of motorcycles that still have 2 strokes

Aprilia produce some of the latest tech bikes..

most of the Jap bike makers have 2 strokes

Check out the Malasian motor cycle industry on the web???

Answer 8

The last development in the two stroke engine was the four stroke engine.

After that, everything except for the smallest motors switched to four-stroke, so you don't have to smell that f**king oil burning.

Chainsaws, weedwackers, and leaf blowers are about it now. Some motorcycle engines I guess.

Answer 9

I have an Aprilia scooter that uses Direct Injection Technology which makes it run really clean and use only a very little amount of oil, also very smooth and powerful. Check out the Aprilia website.

Answer 10

There's nothing better than the smell of 2 stroke exhaust.
That is all...