APT SmartCarb

[Motosportz]

Somebody needs to do a 250 test with this carb.

Will try it on my buddies WR250 next time.

 

[typeone]

awesome reviews, guys!

The size and weight of the CNC version is offensive :>)

when i first saw pics, i wondered about this. it looks massive.

 

[Motosportz]

awesome reviews, guys!



when i first saw pics, i wondered about this. it looks massive.

only because it is. Still works amazing. I cant get over the improved power and throttle response.

 

[454x]

I think I can't wait for the diecast version to come out.

 

[rockdancer]

I dont want to sound like a doubter and I do believe kelly/John that these carbs are great but Id find it a better comparison to see it tested back to back with a well set up 36 pwk or newer modded TMXX carb ( ie correct needle for bike etc) ridden on the same day - same condiitions .
I also wonder what the guage on how lean you are running it is - as you dont have jets to compare it too. I guess you are checking plug
Sounds like a good find though

 

[john01]

Yep it was plug checks for me on my WB165. I may not be the best carb set up guy but I have a clear plastic container with lots of jets and needles where I jetted and re-jetted my stock Mikuni and one that was way better with divider plates etc .that was given to me. Neither set up was remotely close to the SmartCarb after a few simple clicks of a knob with your fingers . More power and no jetting = win wim to me.

 

[Motosportz]

I dont want to sound like a doubter and I do believe kelly/John that these carbs are great but Id find it a better comparison to see it tested back to back with a well set up 36 pwk or newer modded TMXX carb ( ie correct needle for bike etc) ridden on the same day - same condiitions .
I also wonder what the guage on how lean you are running it is - as you dont have jets to compare it too. I guess you are checking plug
Sounds like a good find though

I know, i had a similar feeling. Why had no one built a wonder carb like this before if it was possible. That said and as skeptical as I was this carb is no joke, huge, real, obvious gains in power, much improved throttle response and better mileage. I have ridden probably hundreds of bikes and have been riding for 35 years. Far from knowing everything but have huge experience (time on bikes) and ride a ton and I know when i try something and have a huge ride experience on which to compare it to. the bike I put it on I had just ridden several times int he last week and know exactly how it runs. Even Blake who does not ride my bike much felt it instantly. I'm not blowing smoke, did not pay for this carb, know nothing about that company nor am even able to get dealer pricing as they have none. I have zero stake in this. IMHO there must be something to it really atomizing the fuel. This would account for more power, more response and better mileage. Also I feel a regular carb has lots of inefficiencies and runs lean one minute and rich the next depending on what circuit you are in and what you are doing. The single metering system in this setup seems to make that much more efficient, and requirement (draw / load) dependent. My plug looks perfect and not lean. The bike feels like it is running so hard it is about to explode and on the edge of jetting when it really is not.

This thing works. I have a cast one on order.

Going to try it on a WR250 and my CR165. Will report back.

thanks again John.

 

[flyingbob]

I dont want to sound like a doubter and I do believe kelly/John that these carbs are great but Id find it a better comparison to see it tested back to back with a well set up 36 pwk or newer modded TMXX carb ( ie correct needle for bike etc) ridden on the same day - same condiitions .
I also wonder what the guage on how lean you are running it is - as you dont have jets to compare it too. I guess you are checking plug
Sounds like a good find though

It was a great find for me. I owe Eaglefreak a debt of gratitude for posting this thread! I have ten hours on mine now and I'll have one for every two stroke bike we own! I've researched Red Edmonston and will sing his praises, as well as the American Performance Technologies crew, while twisting the throttle!

 

[MotoMarc36]

I know, i had a similar feeling. Why had no one built a wonder carb like this before if it was possible. That said and as skeptical as I was this carb is no joke, huge, real, obvious gains in power, much improved throttle response and better mileage. I have ridden probably hundreds of bikes and have been riding for 35 years. Far from knowing everything but have huge experience (time on bikes) and ride a ton and I know when i try something and have a huge ride experience on which to compare it to. the bike I put it on I had just ridden several times int he last week and know exactly how it runs. Even Blake who does not ride my bike much felt it instantly. I'm not blowing smoke, did not pay for this carb, know nothing about that company nor am even able to get dealer pricing as they have none. I have zero stake in this. IMHO there must be something to it really atomizing the fuel. This would account for more power, more response and better mileage. Also I feel a regular carb has lots of inefficiencies and runs lean one minute and rich the next depending on what circuit you are in and what you are doing. The single metering system in this setup seems to make that much more efficient, and requirement (draw / load) dependent. My plug looks perfect and not lean. The bike feels like it is running so hard it is about to explode and on the edge of jetting when it really is not.

This thing works. I have a cast one on order.

Going to try it on a WR250 and my CR165. Will report back.

thanks again John.

Alright I'm a huge doubter in snakeoil and "smart carbs " ( a huge oxymorn to me). But you are starting to perk my interest. At first I thought the benefits would be for trailriders who have big altitude changes during a ride and do a lot of partial throttle, and the benefits would be minimal to the way I ride. But I'm really starting to pay attention. I trust the butt dyno that there is a peak power increase, increased atomization could account for that. I would have to think that a 38 would provide even a better peak gain, anyone going to try one of those?

I'm still really scared of the astronomical price!

 

[MattR]

I posted this on the GasGas Rider forum. I'm copying it here in case someone had a similar question.

Corey,

On the production cast version, how many of the critical features will be secondary machined? My concern will be that the cast version will have more dimensional variation. The billet version being all machined is easy to control the quality since everything is machined to tight tolerances. To keep costs lower in production, many of these same features will need to be "as-formed". Can you describe what steps are being considered to ensure the quality and performance matches the proven billet version?

Thanks,
Matt

All mating surfaces of course will be machined, holes drilled and tapped.

The venturi shape is a critical feature that we will likely post process machine, and from looking at the first cast carbs that will be the case. Slide to body interface and clearances are also important. The cast carb will be a one piece body so opportunities for leaks are minimized. Weight, dimensions and durability are also key.

The remaining critical features are related to the metering rod/ nozzle interface and critical features to the MR. Floats and overflow/tip over valves have most of our attention currently.

Corey

From this thread:
http://www.gasgasrider.org/forum/showthread.php?t=13471

 

[Blakelpd5]

For me, the biggest plus is better MPG... The extra power, I don't need... The quicker throttle response is nice for sure, but even with an oversized tank, I'm only getting 50+mpg out of a tank (about the same as when in 125 form). I also think my pilot is a little rich, so I need to address that, but if you can really get an extra 20% MPG out of this, that is HUGE!!!

 

[flyingbob]

Alright I'm a huge doubter in snakeoil and "smart carbs " ( a huge oxymorn to me). But you are starting to perk my interest. At first I thought the benefits would be for trailriders who have big altitude changes during a ride and do a lot of partial throttle, and the benefits would be minimal to the way I ride. But I'm really starting to pay attention. I trust the butt dyno that there is a peak power increase, increased atomization could account for that. I would have to think that a 38 would provide even a better peak gain, anyone going to try one of those?

I'm still really scared of the astronomical price!

Compared to a Ti exhaust system, Sidi Crossfire boots, Flexx bars, oversized tank, it's a heck of a bargain. Oh, IMHO. I can't wait for a GNCC pro to get one.

 

[guscycle]

Compared to a Ti exhaust system, Side Crossfire boots, Flexx bars, oversized tank, it's a heck of a bargain. Oh, IMHO. I can't wait for a GNCC pro to get one.

..I was just wandering that!...and what about this "mod" if you are racing amateur AMA sanctioned events...like Ponca City or Loretta's ? I guess you'd have to run in mod class?!? I had a rider enter Ponca in stock 250 class (a few years back) and during tech they did not let him thru because he had an anti slip seat cover****************************************and Huskys came stock with them...spent an hour or so fighting this...it was ridiculous!

 

[Blakelpd5]

I had a rider enter Ponca in stock 250 class (a few years back) and during tech they did not let him thru because he had an anti slip seat cover and Huskys came stock with them...spent an hour or so fighting this...it was ridiculous!

BLASPHEMY I tell you**************************************** But it seems you already knew that

 

[Eaglefreek]

I owe Eaglefreak a debt of gratitude for posting this thread!

PM me for my Paypal address. I'm just glad it worked and no one felt as if they got ripped off. I am so obsessed with this carb, but unfortunately don't have the funds right now to purchase one. I actually had a dream the other night that I bought an APT for my car it made it run 100 times better.

 

[Motosportz]

P I actually had a dream the other night that I bought an APT for my car it made it run 100 times better.

OK not we are in hyperboil zone.

he he he

Good stuff. And yes, thanks for starting this fun thread.

 

[Motosportz]

Alright I'm a huge doubter in snakeoil and "smart carbs " ( a huge oxymorn to me). But you are starting to perk my interest. At first I thought the benefits would be for trailriders who have big altitude changes during a ride and do a lot of partial throttle, and the benefits would be minimal to the way I ride. But I'm really starting to pay attention. I trust the butt dyno that there is a peak power increase, increased atomization could account for that. I would have to think that a 38 would provide even a better peak gain, anyone going to try one of those?

I'm still really scared of the astronomical price!

Mark, I am with you on the snake oil and smart carbs. Had John not sent me this I would still be scratching my head. Let me back up some and say this carb is in no way necessary nor fantastical. Lets not get too excited here. That said it is pretty cool and for sure is a performance increase on several levels. Who knows maybe I'll blow my motor up with this goofy thing. Its all part of the fun.

I was wondering when you might pop your head in here being a moto guy and with a 125 husky. I think there would be real benefits for you guys too. The response and roll on power is noticeably better and can only help coming out of corners and jump faces. On my particular setup the top end gain was huge. Probably more there than anywhere and makes me wonder if my main was off. BUT the Doma always feels this way to me on the 4-5 bikes I have used it on. I like the Doma as I trade some top end for better low and lots more mid which works for my woods needs. With the APT it freaking RIPS on top. I need to get more top end open area time on it to be able to report fully but sure seems like the top end gains are big. Need to get it out to the dez. The quick adjustment does affect the mixture and is fine enough (50 clicks I think) that it offers nice detailed tuning. The cast price is supposed to be closer to $400 so not bad.

Again this thing is not the holy grail like it might sound but first impressions are that it is very impressive.

 

[john01]

You are welcome Kelly. I sent the carb to you for your .02 because like you said you have no dog in the fight and I wanted someone with lot's of different bike brands, types, sizes, ect. to call it like they feel it. I've been reading your ride reports and value your opinion. So test on .

 

[Joe Chod]

Price is not bad....spent more than that at a bar on several occassions...no wait...that was in Bangkok...well nevermind

 

[Blakelpd5]

Price is not bad....spent more than that at a bar on several occassions...no wait...that was in Bangkok...well nevermind

Drinks are CHEAP over there... We bought a whole bar for the night with unlimited drinks for 15+ peeps for less than that my friend.... Me thinks your money went to "other" things, and I applaude you for having a good time!