Smart carburettor

[Slakewell]

AS there is a broad base of knowledge on here whats the opinion of these?



https://www.enduro21.com/index.php/40-general/3751-first-look-smartcarb-a-smart-look-at-the-carburettor-problem

https://technologyelevatedco.com/smartcarb/

[PEZBerq]

Very interesting Slakewell. Assume it works as advertised. Not cheap and that would be why OEM’s haven’t used them. Wonder how they compare to EFI on the modern 2 stroke enduro bikes?

[pokey]

I would like to pull one down to see exactly how it does what it does. Not a lot of tech info  in the blurb but I have no doubt its a good bit of kit.

Two years ago i rode a KLR650 from sea level up the range  and the altitude killed off any performance the bike had. I can see a market with the adventure bikes that arnt FI.

[GMC]

Interesting, the 500 odd dollars I assume is US?
While not overly extreme it would be enough to put off the manufacturers although if it helps with emissions as claimed you would think that would be enough for the manufacturers to use it these days

The boost bottle lives in modern times

[Lozza]

AS there is a broad base of knowledge on here whats the opinion of these?



https://www.enduro21.com/index.php/40-general/3751-first-look-smartcarb-a-smart-look-at-the-carburettor-problem

https://technologyelevatedco.com/smartcarb/

Snake  oil from a snake oil salesman. Other than altitude compensation does nothing that the carb you get with your bike. Not many race tracks (even Spa or the Nurburgring) have big enough changes in altitude to affect the jetting.  The "inventor" run away at a rapid rate when he was required to turn up with his carby at a dyno with a extremely well tuned RS 125 for a back to back test.

[ralph311]

http://www.pbase.com/jdjetting1/metering_carburetor_dyno_comparison&page=all

[skypig]

I think these are bit more popular with guys in the US.
Often fitted to KTM/Husky 300s, especially post the change to Mikunis by the Factory.
(Especially by riders that ride at various altitudes, obviously.)

[djr]

" up to 10% more power, 30% more fuel economy, 50% better emissions " is claimed by the manufacturer of these carbs
personally I would be surprised if there is that much difference between a properly set up carb and a good fuel injection system if fitted to the same engine.

to be fair they look a well made item and they haven't been made down to a price , but these days a genuine 5% improvement is a big step as just about everything has been researched by the big manufacturers , and good new ideas are rare.

there are people on forums fitting these and saying they have made a big improvement, but maybe their old carb was worn/poorly jetted ?

hopefully i am wrong though, as 50% better emissions could help keep 2 strokes going for a few more years

[Curtis]

Id love to try one of these on a old bike.  The improvements could be greater than a new bike.

[Tomas]

would this be type of a carburettor that is used on brush cutters/chainsaws? of course this one uses flat slide and does not have membrane pump(gravity fed) but only two adjustment screws just like some chainsaws/brush cutters. one on top would be ritch/lean and the other one is idle adjustment. Am I right?

[dont]

It would be interesting to search for the (US?) patent document to see the technicalities.

[Lozza]

http://www.pbase.com/jdjetting1/metering_carburetor_dyno_comparison&page=all

Thanks for finding that, the differences in all those runs look to be nothing more that run to run variations, the only run that was any different was torque from a Lectron.
50% improvement on emissions is impossible from a carby on a 2T. If you ride where there was big elevation changes the smart carb or Lectron/EI would be worth a try