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wow so its now November.....

Yea. I feel for apt. I understand timelines getting delayed on a product release, but to happen with so much public hype just sucks for them.

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Yea. I feel for apt. I understand timelines getting delayed on a product release, but to happen with so much public hype just sucks for them.

 

If they release the affordable cast product prematurely, and some common fault happens, then they'd be done. You only get one first impression, and on the broader dirt bike marketplace APT have to believe they have not used it.   Considering who APT want to sell to (every 2 stroke dirt bike owner), APT are still unknown. That's a good thing for them right now.   I think they are doing the right thing.

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Well they have been plugging their part throttle power?  Why not just buy a different throttle cam?

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wow so its now November.....

Pretty soon they will miss the boat for the guys that want them installed for winter riding.

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I think the biggest mistake was to do the pre-order before they got all the bugs worked out.

 

Hindsight being 20-20 and all. They are probably about ten times more disappointed in the troubles that they have had than any customer is. 

Edited by shagger
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I paid for a pre-order back in May but I always had in my mind that it was kind of like an "investment" that will come back to me in the future so was prepared to wait, not taking much notice of delivery times. 

Reading between the lines I believe the whole idea for the pre-order thing was some much needed cash flow for a small company releasing a new, almost breakthrough product. 

At least they are staying transparent and seem to be doing the right thing. I will be patient. 

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Cough Letron cough cough

 

 

 

Sorry

 

 

 

 

Had to

 

 

 

:)

Edited by kan3
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Not long now! 

 

from KTMTalk: 

 

Yes carbs are cast and being machined with hopefully the last of the revisions. Trying to have the first ones going out the door Oct. 8.

We are still refining our process and will be hiring new bodies as we ramp up. With current staff and no hand fitting of parts we can build between 30 and 50 a day. Corey

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Latest email:

 

To Our Pre-Order Customers,

This is an update for our SmartCarb pre-order customers on the
progress of cast 38mm SmartCarb durability testing and production
timeline.

American Performance Technologies is pleased to announce that the
in-house comprehensive durability testing phase is complete. External
durability testing by riders in the field will remain ongoing as we
continually look for ways to improve and refine our technology.

Minor wear and durability related issues have been addressed and
appropriate changes have been made to final casting and machining of
38mm cast SmartCarbs. Float bowl baffling has been markedly improved
to reduce chances of fuel cavitation/bogging and new floats will
minimize flooding issues and reduce part count and complexity. By
taking the time necessary to complete comprehensive durability
testing, we feel that we have satisfied our obligations to ensure
that our product meets and exceeds the high quality expectations of
our customers.

Today our supplier has announced that we will not be receiving
production castings on October 8 as promised. Our supplier has
assured us that SmartCarb castings will begin arriving, fully
machined and ready for assembly, starting October 22. APT will then
begin shipping them out to pre-order customers as we build them on a
first-ordered, first-received basis.

As always, American Performance Technologies appreciates your
patience and support.

After APT receives this first run of 38mm cast carbs, we will quickly
move into casting other sizes.  Unfortunately, this means that there
will be a considerable amount of time before we produce another run
of SmartCarbs in the 38mm size. After current pre-order quantities
are satisfied, we estimate that there will only be 100 cast 38s in
this first run that will go into on-the-shelf inventory.  APT expects
that shelf stock of 38mm carbs to be depleted quickly due to high
demand.  If you want to get your hands on one of these remaining 38mm
cast SmartCarbs, we encourage any who are interested to go to our
website, www.powerapt.com, and pre-order.


We will keep you up-to-date and a notification will be sent to your
email once your SmartCarb has been shipped.  If you have any
questions or concerns, please give us a call at 1-877-372-3465.

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I am interested in buying an APT smart carb for my 2005 YZ250 with EG295 kit. Has anyone seen any specs listed on the size of the APT 38mm cast carb?

Does the following statement mean they are the same length and use the stock throttle cable, Intake and Airbox boots?

 

This statement is from the APT website:

-------------------------------

APT Performance Series SmartCarbs are designed to replace most conventional Mikuni and Keihin carburetors. Some of the models for which we provide drop-in replacements are:

Keihin PWK SHE, PJ

Mikuni TM and VM

Keihin FCR/ TPS Side Pull

CVK PD19J, PD24J

--------------------------------

 

If fitment is a problem there could be a lot of unsatisfied customers, including myself.

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Can't remember the exact dimensions but fit is definitely an issue as the Smart Carb is bigger. Based on Lectron experiences, getting the thing on your bike will be a pain and it will also cause your airboot to be tweaked and rub on your shock spring. How much - well we will have to wait and see once the first cast units start arriving in people's hands. 

 

this issue and the carb's dimensions have been discussed if you search either on TT or KTM talk

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My shortened Lectron fit with no issues. Installation was a breeze. I did remove the torque spacer though. I also needed the longer throttle cable they offer.

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Thanks for the replies.

 

I got a response from Steve Tutt at APT,
"Yes these are a drop in for the YZ250.  We test on Pro Am rider Alex Malott YZ250 and it fits fine.
 I have attached the dimensions." 
 

I couldn't post the attachment he sent me. Here are the CAST CARB dimensions.

The 36mm, 38mm, and 40mm are the same size.

 

Intake side bell dia. 46mm

filter side bell dia. 62.4mm

length 94mm

overall height 175.9mm (including adjustment knob)

 

Billet dimensions are the same except for the length is 94.5mm

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Good news, looking forward to getting mine and doing some winter riding. I may try it on my 125 for giggles too..

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Thanks for the replies.

 

I got a response from Steve Tutt at APT,
"Yes these are a drop in for the YZ250.  We test on Pro Am rider Alex Malott YZ250 and it fits fine.
 I have attached the dimensions." 
 

I couldn't post the attachment he sent me. Here are the CAST CARB dimensions.

The 36mm, 38mm, and 40mm are the same size.

 

Intake side bell dia. 46mm

filter side bell dia. 62.4mm

length 94mm

overall height 175.9mm (including adjustment knob)

 

Billet dimensions are the same except for the length is 94.5mm

 

 

From another thread - http://www.thumpertalk.com/topic/1017683-38mm-lectron-carb-install/?hl

 

The PWK on the YZ's with TPS is shorter than a standard PWK. The standard carb is 91mm, and the Smart Carb would be a drop in. Guys trying them on the YZ's are finding them much too long, and causing interference between the shock spring and airbox boot.

 

I was having a nice cold brew pondering if maybe I should return the Lectron and go for the cast APT SmartCarb until I saw this....

attachicon.gif36-40mm Cast External Dimensions.jpg

The APT is 94mm long. A guy just can't win with these YZs. :)

38mm Keihin = 75mm (2 61/64")

38mm Lectron = 93mm (3 21/32")

38mm APT SmartCarb = 94mm (3 45/64")

Here's the billet APT measurements:

attachicon.gif36-40mm Billet External Dimensions.jpg

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adam728, Thanks for the link. Lots of good info there! I searched for smart carb etc. Didn't think about searching for Lectron.

 

I think I am holding off to see if APT is coming out with a shorter version like Lectron... Or I might just go for the Lectron shorty.

I have been battling jetting on my YZ295 motor with stock carb (I thought)... The real culprit showed it's face last weekend. My coil is weak... Talk about blowing your mind... It would be running fine then break down suddenly and run like crap. Finally almost lost all spark. I've never had one act like this. Usually they just totally go at once. Of course this happened a week or so after bolting on my EG295 top end so I thought that had something to do with it. The temps have been up and down 20 degrees or so too so that didn't help.

I hope get my coil today so I will see how much of a pain jetting the PWK will be this weekend. Or how touchy the EG295 motor is on jetting.

Thanks for all the responses guys !

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My 87 used to foul plugs out of the blue every once in a while.  Was running in circles chasing the problem, then found out the coil was bad.  It generates a week spark that doesn't cross the gap, it tracks down the insulator.  Once that happens the plug is toast.  It was never a jetting issue.  Once you get your new coil you will likely find that you never had any jetting issues and the PWK carb is damn good at mixing fuel and air.

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Once you get your new coil you will likely find that you never had any jetting issues and the PWK carb is damn good at mixing fuel and air.

I agree. If (and this is a big if) you don't need to deal with big variations in temp, humidity or altitude, then a properly set up PWK can work great. After some work on it I think mine works awesome on my 295.

 

The Smartcarb always has the potential to be better and more versatile, and I love the idea of no messy tubes hanging off the carb, but will the SmartCarb fit the YZ250?

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