A real race machine

drthompson65 · #1 (**permalink**) 11-05-2009, 02:31 AM

Soup :: Buy The Doohan NSR500 Championship Print Here ::

drthompson65 · #2 (**permalink**) 11-05-2009, 02:33 AM

I think I need all four..

SuperbikePlanet.com // Roberts Yamaha, Lawson Yamaha, Degner Suzuki Art Prints Here

robfromsc · #3 (**permalink**) 11-05-2009, 01:32 PM

Love to have the NSR!

mikstr · #4 (**permalink**) 11-05-2009, 01:44 PM

mmmmmmmmmmm, two-strokes

nomo · #5 (**permalink**) 11-05-2009, 01:58 PM

Look at the length of the NSR's swingarm !! Geez . Better to tame that beast .

**mrgrn** · #6 (**permalink**) 11-05-2009, 02:01 PM

expansion chambers

mikstr · #7 (**permalink**) 11-05-2009, 02:06 PM

Quote:

Originally Posted by nomo

Look at the length of the NSR's swingarm !! Geez . Better to tame that beast .

ah, the things you can do with a truly compact two-stroke engine. How long before we get a DI two-stroke streetbike? Now THAT would be exciting (mega light, überpowerful,... and easily capable to showing up teh "cammers", regardless of engine configuration)!

nomo · #8 (**permalink**) 11-05-2009, 03:40 PM

We're gonna get flamed but the truth isn't always popular . With today's engine/throttle management fluttering FI to smooth out torque , DI , frame tech , mass centralization , tire advances , etc. , etc. , a new stroker ss would KILL !

mikstr · #9 (**permalink**) 11-05-2009, 04:15 PM

Those who would flame are in denial. Leave the cammers to Harleys and Goldwings. When ti comes to sporting applications, a two-stroke is the way to go, especially with modern electronics and intke/exhaust technology which allow you to broaden the powerband and tame the power delivery. I would like someone to explain how a more compact engine (and all the advantages that entails in terms of chassis design) with significantly lighter weight and increased power cannot be good in a sportbike application? After all, is that not exactly what engineers and designers are always striving for?

duckdawg · #10 (**permalink**) 11-05-2009, 07:01 PM

nothing smells like Blendzall Gold Label in the morning...

mikstr · #11 (**permalink**) 11-05-2009, 07:12 PM

modern DI two-strokes no longer emit the typical two-stroke smell, or any smoke either. They truly do allow you to have your cake and eat it too (not to mention burning less gas than comparably powered four-strokes; oil consumption is roughly equal to that used by a four-stroke, the difference being that it burns it whereas it gets changed (and typically burned in an incinerator) in the case of a four-stroke).

RCJAY · #12 (**permalink**) 11-05-2009, 08:07 PM

Quote:

Originally Posted by mikstr

modern DI two-strokes no longer emit the typical two-stroke smell, or any smoke either. They truly do allow you to have your cake and eat it too (not to mention burning less gas than comparably powered four-strokes; oil consumption is roughly equal to that used by a four-stroke, the difference being that it burns it whereas it gets changed (and typically burned in an incinerator) in the case of a four-stroke).

+1 they are using thinner and thinner oils now so the pollution is way down. If modern FI can widen the power band and make it even easyier to ride two smokers is the way to go.

Way lighter and narrower motor then any 4stoke and or V4s too.

mikstr · #13 (**permalink**) 11-05-2009, 08:20 PM

it is not thinner oil that has solved the problem, it is electronic oil pumps (on the E-TEC design anyhow) which precisely meter just the right amount of oil to just the right place. What oil is used is completely burned (and any hydrocarbon which burns completely leaves no smoke, it only produces water vapour and CO2). I spoke at length with the project leader of the E-TEC engine at Evinrude (was prepring an article about the then-new technology) and those boys really did their homework. The injector used in that engine, the heart of the technlogy, uses magnetic impulses and operates on a principle similar to a speaker. This was the breakthrough which allowed them to get over the previous rpm barrier they had to content with. It also allows them to switch between stratified and homogeneous mixture modes, somethign the other designs (including Yamaha`s HPDI) fail to do.

FI in itself does not widen the powerband per se, it is the cimputerized power (exhaust) valves (such as the three-step eRAVE used in the Rotax 600 HO E-TEC) which really get the job done in this regard (that and modern reed valve technology)

RCJAY · #14 (**permalink**) 11-05-2009, 08:23 PM

Quote:

Originally Posted by mikstr

it is not thinner oil that has solved the problem, it is electronic oil pumps (on the E-TEC design anyhow) which precisely meter just the right amount of oil to just the right place. What oil is used is completely burned (and any hydrocarbon which burns completely leaves no smoke, it only produces water vapour and CO2). I spoke at length with the project leader of the E-TEC engine at Evinrude (was prepring an article about the then-new technology) and those boys really did their homework. The injector used in that engine, the heart of the technlogy, uses magnetic impulses and operates on a principle similar to a speaker. This was the breakthrough which allowed them to get over the previous rpm barrier they had to content with. It also allows them to switch between stratified and homogeneous mixture modes, somethign the other designs (including Yamaha`s HPDI) fail to do.

FI in itself does not widen the powerband per se, it is the cimputerized power (exhaust) valves (such as the three-step eRAVE used in the Rotax 600 HO E-TEC) which really get the job done in this regard (that and modern reed valve technology)

Great info, thx

**mrgrn** · #15 (**permalink**) 11-06-2009, 12:20 AM

Quote:

Originally Posted by mikstr

it is not thinner oil that has solved the problem, it is electronic oil pumps (on the E-TEC design anyhow) which precisely meter just the right amount of oil to just the right place. What oil is used is completely burned (and any hydrocarbon which burns completely leaves no smoke, it only produces water vapour and CO2). I spoke at length with the project leader of the E-TEC engine at Evinrude (was prepring an article about the then-new technology) and those boys really did their homework. The injector used in that engine, the heart of the technlogy, uses magnetic impulses and operates on a principle similar to a speaker. This was the breakthrough which allowed them to get over the previous rpm barrier they had to content with. It also allows them to switch between stratified and homogeneous mixture modes, somethign the other designs (including Yamaha`s HPDI) fail to do.

FI in itself does not widen the powerband per se, it is the cimputerized power (exhaust) valves (such as the three-step eRAVE used in the Rotax 600 HO E-TEC) which really get the job done in this regard (that and modern reed valve technology)

yes, great info

mikstr · #16 (**permalink**) 11-06-2009, 12:51 AM

wow, I have new-found credibility again?

Superhawk69 · #17 (**permalink**) 11-06-2009, 01:12 AM

Did someone here post the link to the site where a company takes modern Kawi's I believe and then put 2 stroke motors in them... there were 3 choice's of motor and it really looked trick.

drsus · #18 (**permalink**) 11-06-2009, 01:40 AM

never get tired of looking at these

**mrgrn** · #19 (**permalink**) 11-06-2009, 01:42 AM

Quote:

Originally Posted by mikstr

wow, I have new-found credibility again?

you always had it, just it got lost with your V4 banter with larry and it watered down both your vast info to be shared and that is a shame IMO

i love you man

Dezmo · #20 (**permalink**) 11-06-2009, 01:42 AM

This will give you a newfound respect for 2 strokes:
Amazon.com: Stealing Speed: The biggest spy scandal in motorsport history (9781844256891): Mat Oxley: Books