APT SmartCarb

From the drawings it appears that the APT is close in size to a PWK Air Stryker I. What is confusing to me is that the cast AND billet Smartcarbs have the same dimensions per the drawings. This was not supposed to be the case, correct?
 
throttle cable

I ordered a cast smart carb, while we all wait, i have a question.

What throttle cable would be optimal for the smart carb? I ask this because it appears that the carb can come with a variety of different interfaces for the throttle on the top. So do you order it with a stock gasgas cable type cable interface, or something else, maybe something more optimal.
 
IDAHOSPUD said:
I ordered a cast smart carb, while we all wait, i have a question.

What throttle cable would be optimal for the smart carb? I ask this because it appears that the carb can come with a variety of different interfaces for the throttle on the top. So do you order it with a stock gasgas cable type cable interface, or something else, maybe something more optimal.
Click to expand...

The cap is threaded to accept either our cable guide, which is supplied, the OEM Keihin or Mikuni cable guide, or a threaded end Motion-Pro cable. Cable lengths are closer to stock with new attachment point in the slide and a new cable retainer.
 
Smart carb length

I'm with GMP on this as well. I remember reading they would be made shorter.

IDAHOSPUD you may want to try the motoin pro t-3
 
john r b said:
I'm with GMP on this as well. I remember reading they would be made shorter.

IDAHOSPUD you may want to try the motoin pro t-3
Click to expand...

They are shorter...by .5mm :D Right, not funny for guys with bikes that don't have much room. Sorry Rick. We all wish the OEM's would stick with something common across the board, but with links, no links, linear's, progressive's it will never end.

Investment casting will not allow collapsible tooling for the slide cavity, thus we were not able to shorten the carb as much as we like this time. Permanent mold tooling will allow us to move material around to make for shorter spigots. The area under the slide will never change because of the signal we are able to generate with the current geometry. Airflow doesn't care what we want. Red Edmonston always used to say you have to work with mother nature and she's an ornery old b!+ch.

GasGas prefers the added length and said they always felt the longer Keihin PJ based PWK striker I added power down low over the striker II. We know it does for the SC.
 
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It sure seems that the longer Air Stryker I is a lot less of a PIA than the II, as far as dialing it in.

My '12 with '13 tank is more roomy over the carb than my '07, FWIW. I don't think any GG application will be a big problem. Perhaps it may require heating and reforming the airboot a bit, but that disaster of a part has been the same for years. A good opportunity for a change at the factory to a more reasonable compound.
 
Singletracker,

I have been dealing with this for a few weeks working VERY close with the Lectron guys. It will not work. The YZ carb is same carb as the Husky's have, TMXx, 38mm, 76mm overall.

The guys at Lectron are super, Kevin has gone above and beyond to help me and I can't say enough about them. Great customer service...hands down!

I am not bashing, bad mouthing or anything like that, it just is not ment to be shoehorned into that little space. With the APT it is the same thing, overall it is too long.

I'm not mad, it is what it is!

I pickup up a RB 38mm mod carb TMXx with all the bells and goodies over the weekend, that is what I used and raced with yesterday. WOW! What a monster that is! Improved lowend, however made the mid hit a bit harder, super strong over the non-mod carb! Same jetting as I was running!

I will stick with what I have for now in Yamaha, the GG 200, not sure what I am going to do yet!

All I can say is, if anyone is going to swap out a carb, make sure it is going to fit, both heights and lenghts, if you are using an over sized tanks??? Check before you buy!


Again, please don't take my posts with regarding the Lectron the wrong way, super great guys, excellent customer service and willing to help as long as it is do-able! and in my case, not really do-able!

Thanks
 

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Riding4fun said:
Rick
I just ordered a 36mm for a 05 yz250, should I expect issues too?
Click to expand...

The SmartCarb will fit and certainly work better than any other carburetor you will ever put on your 250. The SC will also fit most 2 stroke dirt bikes that came with a carburetor. As with any high performance part some fitment/modification may be necessary. I believe the effort is worth it and in the case of a YZ 250 a 10% gain in HP 8 % gain in torque and awesome over rev. You decide. :)


http://www.youtube.com/watch?v=2e308uZy-XE

http://www.facebook.com/photo.php?fbid=476215102413927&
 
Yamahas I've played with have airboots that are relatively easy to deal with. Huskys too, and most others as well other than GGs. Fortunately, the GG air boots seem to be the same, molded for the original PWK ASI carb that is only 3mm shorter than a Smartcarb. Thats less airboot compression than adding a reed spacer, like the 300s used to come with.
 
Ride 4 fun,
Since you use a PWK carb you should be good to go. Like said, my oem carb is only 76mm overall. Measure your crab to make sure.

Good luck
 
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motogroove said:
Pre-ordered a 38.
:eek:

I guess I'll have it in time for my Southwick fun-fest/race on Memorial Day weekend.
Probably not in time for my trip to Durhamtown Plantation in March, though.

...excited.:cool:
Click to expand...

Cool, if I haven't decided to order one by then, I'll at least come over and drool on yours. :D I think I've met you at the fun-fest last year, did you have the GG that suffered a performance penalty due to unexpected items in the intake tract?

I'm the nutter on the 'eBay Special' 92 Yamaha WR250R btw.
 
Kurlon said:
Cool, if I haven't decided to order one by then, I'll at least come over and drool on yours. :D I think I've met you at the fun-fest last year, did you have the GG that suffered a performance penalty due to unexpected items in the intake tract?

I'm the nutter on the 'eBay Special' 92 Yamaha WR250R btw.
Click to expand...

Two years ago I left a piece of paper towel in the exhaust manifold. That did not help performance. :eek:

Looking forward to seeing you (drool). :p
 
im having some issues with my smart carb , seems like a lean problem but i couldnt remember which way to turn for lean and rich , i tried a few turns in both directions , elevation was from about 300ft to 1600 feet , the higher we went the worse it seemed to be , every time you chopped the throttle the bike kept running on , the air filter is clean and it has a new plug in it .
i also fell off and filled the engine with gas which took no end of kicking to get back into life , not helped at all by my new sidi crossfire srs soles ... they tend to slide off the kickstart :mad: so you cant get a decent kick
if you look at this video http://contour.com/videos/watch/file0055-1--9 at around 1min40 you can hear it hunting , have you any ideas corey , is there also a baseline setting for needle clicks to go back to standard so i can start from fresh.
any news on the anti flood valves , i have a race in two weeks and dont want any starting issues if i drop the bike .

chris
 
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