APT SmartCarb

[andoman]

I'm about to spring for the Smart Carb, but have a question about the "improvements" of the cast unit. Specifically the check valves.
I understand that this is to prevent the float bowl from emptying into the bike's engine should the bike wind up upside-down for a prolonged period of time.
However, that would be just one float bowl's worth of fuel. So the bike gets flooded: it happens from time to time with a standard carb anyway. No big deal. Unless the result is a cursing kick-fest every time the bike is on its side for the slightest amount of time.

Question: Are check-valves more of a potential failure point than a solution to a real problem?
I guess what I'm really asking is, is that improvement really worth waiting for?

 

[Colemanian]

Just out of curiosity, is there a "real" group buy in the works? I've read the entire thread and I may of missed it. I've seen several people say to put them on the list but I haven't seen it. That being said, I'f we can get special pricing on the cast version then I'm in for a 38mm. Please elaborate for me. Thanks.

 

[GMP]

There is no official group buy and associated discount. Assume the approximate stated price. Right now we are just getting numbers and when the time comes hopefully a better price based on those numbers.

 

[john01]

Or at least we may be FIRST in line. I just got in and the brown truck had dropped off my SmartCarb . Just took it out the box and I can where they get the asking price; very high quality looking piece . If it works half as good as it looks.....I'm gonna be a happy biker. Thanks! BTW it will be bolted on and tested tomorrow.

 

[Colemanian]

Or at least we may be FIRST in line. I just got in and the brown truck had dropped off my SmartCarb . Just took it out the box and I can where they get the asking price; very high quality looking piece . If it works half as good as it looks.....I'm gonna be a happy biker. Thanks! BTW it will be bolted on and tested tomorrow.

Sweet, I'll be looking forward to your evaluation.

 

[nambo-trev]

I'm about to spring for the Smart Carb, but have a question about the "improvements" of the cast unit. Specifically the check valves.
I understand that this is to prevent the float bowl from emptying into the bike's engine should the bike wind up upside-down for a prolonged period of time.
However, that would be just one float bowl's worth of fuel. So the bike gets flooded: it happens from time to time with a standard carb anyway. No big deal. Unless the result is a cursing kick-fest every time the bike is on its side for the slightest amount of time.

Question: Are check-valves more of a potential failure point than a solution to a real problem?
I guess what I'm really asking is, is that improvement really worth waiting for?

it isnt just the float bowl fuel,if the bike is upside down your going to continue leaking fuel. this can end up being a lot of lost fuel at the end of a 5 or 6 hour mountain ride, could cost you walking out because of running out of fuel which has happened to my buddies a few times.maybe not such a huge concern to others but to me is a value add on for the riding i do and the off chance i end up battling that gnarly hill for an hour spending fuel everytime i dont make it.just my 2 cents

 

[john01]

Sweet, I'll be looking forward to your evaluation.

I'll get it bolted on tomorrow for sure but may have to do the ride report on Wed.; rain tomorrow.

 

[GMP]

What? You afraid to get wet?

 

[Corey]

My bikes have always started easier doing that after sitting in a cold garage with dry carbs, so its not necessarily a Smart Carb only thing, although it may be more sensitive.

Corey, Am I correct in assuming that the die cast body will more closely approximate the size of the Keihin and eliminate or greately reduce any fitment issues?

Yes we are working diligently to make the SmartCarb as easy a fit as possible.

Corey

 

[john01]

What? You afraid to get wet?

Yep . Well that was plan....to bolt on the SmartCarb, at least see if the bike would start, and idle in the garage. Well once the bike fired up (3-4 kicks) and set there with the best purring idle it's ever had.....I HAD put on the helment and go for some test rides in my back pasture. My bike started life in 2008 as a Husky CR125. It's grown a little like me and is now 165 cc's. I made sure the bike was warm and went for some med-high speed blast. I adjusted the settings 3 turns richer and for now (until it's dry) I'm going to leave it alone. The bike feels AWESOME! Idles perfect, spins up better/faster than it did in 125 trim, pulls like crazy, and the throttle response is so crisp and clean it feels FI. I'm not much of a writer/reporter but honestly this SmartCarb exceeds my expectations by a LOT! My bike pulls so quick and clean now it doesn't even feel like the same bike; unreal. LOL my son hates the rain more than me but he had to ride it after seeing how much fun I was having. His response was "WOW this thing now spins up in a hurry"! He also said " it has a much much cleaner, sharper, and responsive throttle response; feels FI now". He loves it. His bike is a 2011 TM250Mx with RB carb and head work so he's not easy to impress. Anyway guys this is the short report I promised with more to follow...when it's dry . Thanks again for getting the word out on the SmartCarb. Awesome product! BTW it fit my bike like a glove no problems there.

 

[hannesd]

this really makes me want to buy one too , you know, eventhough i don't really need it.
i hardly ride at all because i don't have any legal spots to go riding enduro (except racetracks).
my ec 200 rides well but not exactly how i would want it to, this could help me out, i know so
i'm curious if anyone will get it for their 200

ciao, Hannes.

 

[hannesd]

With this carb, there's no need for Direct Injection. Way less complicated for the same end result-optimium fuel atomization.[/QUOTE]

very good arguement!
i wonder how much difference there would be say between an DI 2stroke and a standart 2stroke equipped with the smartcarb.
looking at gas milage and gained torque and HP/drivability.
if i'm not mistaken, there's only 1 (or2) snowscoots that have DI in their 2stroke,right?
the bombardier snowscoot has it, it's a 600cc engine, so if smartcarb could be installed on another 600cc snowscoot, same weight category,equipped with the appropriate size of smartcarb THEN it would be a fair test.

what'cha think?

hannes.

 

[Caravan Monster]

i'm curious if anyone will get it for their 200

I will order one for my 200 as soon as the cast ones are available. My bike is quite sensitive to air temperature changes. Sounds like the SmartCarb will improve it.

 

[hannesd]

I will order one for my 200 as soon as the cast ones are available. My bike is quite sensitive to air temperature changes. Sounds like the SmartCarb will improve it.

did you adjust the compression or leave it standart?

 

[nambo-trev]

With this carb, there's no need for Direct Injection. Way less complicated for the same end result-optimium fuel atomization.

very good arguement!
i wonder how much difference there would be say between an DI 2stroke and a standart 2stroke equipped with the smartcarb.
looking at gas milage and gained torque and HP/drivability.
if i'm not mistaken, there's only 1 (or2) snowscoots that have DI in their 2stroke,right?
the bombardier snowscoot has it, it's a 600cc engine, so if smartcarb could be installed on another 600cc snowscoot, same weight category,equipped with the appropriate size of smartcarb THEN it would be a fair test.

what'cha think?



hannes.[/QUOTE]

One of the big things about direct injection is we wouldn't need the giant expansion chamber, that's a pretty significant thing that we would enjoy with direct injection.

 

[GMP]

Ultimately, I still think DI would be better from a pure performance perspective, and depending on how the emissions specs are written in the future, from an emissions perspective. Reason is the fuel is injected AFTER the exhaust port is closed. And yes, a smaller pipe is very attractive. An HP injector sitting on the head, fuel pump, computer, and associated sensors and harness is not. If the Smart Carb will do the job and get 2strokes through emissions testing then sure as hell DI will be shelved for now as why add the complexity and expense? Simplest way to solve a problem is always best, and this is about as simple as it gets for an OEM.

 

[john01]

Very well said Glenn.

 

[twowheels]

Ultimately, I still think DI would be better from a pure performance perspective, and depending on how the emissions specs are written in the future, from an emissions perspective. Reason is the fuel is injected AFTER the exhaust port is closed. And yes, a smaller pipe is very attractive. An HP injector sitting on the head, fuel pump, computer, and associated sensors and harness is not. If the Smart Carb will do the job and get 2strokes through emissions testing then sure as hell DI will be shelved for now as why add the complexity and expense? Simplest way to solve a problem is always best, and this is about as simple as it gets for an OEM.

No control software to write, no electrical connections to make and keep made, better emissions footprint just by the fact that there are no external vents ... virtually nothing go wrong.

The government may still be able to screw it up though - they mandated ELECTRONIC stability control when there were simple mechanical solutions to the perceived problem.

Tidy solution to be sure. I'll want a cast version to be sure ...

 

[john01]

I do really like how simple the SmartCarb is compared to FI. That's why my favorite bike is a 2-stroke too. I putted around the pasture and woods at my home today again after the rain and the SmartCarb feels even better without the cold rain hitting me . Very very crisp throttle response; I like that a LOT!

 

[Diggs345]

It's quite a funny thing when I think back a few months when I was playing with the jetting on my bike , I remember seeing a similar carb in the past that was jetless , lectron I presume , and thinking to myself I'll have to have a look to see if I can find one , I couldn't remember the name though , then all of a sudden this tread pops up on here and has me hooked.
The main reasons for my purchase is the one screw adjustment and smooth delivery the carb is reported to give , the extra fuel mileage and power/ torque is just a bonus .
I'm away from home a lot too and the last thing I want to do is spend time messing with jetting , I just wanna ride
So a big thanks to the original op for bringing this to our attention and Corey for developing and supplying the carb