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Only $10 for all 2026 SX, MX, and SMX series.
APT is a joke, not so much their carb, but their business model.
I agree with you regarding APT's business model.
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The Ossa at the top of that article, which they say was "developed" in 2011 and never sold in the US... That was a non-running mockup, created to generate hype for Ossa. Not only was it not sold in the US, it wasn't sold anywhere. MXA should've known.
http://lewisportusa-com.3dcartstores.com/OSSA-TRIALS-BIKES_p_537.html
multiple curve ignition maps and the tuning options are what would make this "worth it" on a two-stroke, but only at that level. with a carb, you have 5 fuel circuits. air screw, pilot, needle, clip position, main. 6 if you count the slide cut-out. that means you only have 6 windows of opportunity to tune from idle, to redline, which on a twostroke 250 is about 9,000 rpms.
if that bike were EFI, you would be able to tune from idle to redline in increments as small as 50 rpms. that, for example, would be 180 fuel circuits. slightly more than 6 mechanical ones...
Then, if you were to combine that with ignition curve adjustment, an inclined individual could tune out every single hitch or jump in power delivery. for example, the bog most two-strokes have off the bottom... its lean.. because the engine isn't generating enough vacuum at low rpms to pull fuel up out of the floatbowl.. you can't tune that out, not even with an airscrew adjustment. it's a gravity fed carb drawback. if that fuel were pressurized via EFI, it would be gone, and you'd have a smooth idling, responsive two-stroke.
that's what is frustrating to me, i see the possibilities, and understand them fully, and want to dig into it, but no one will sell me one.
Many markets, to get significant / viable sales demand full Road registration. Very much stronger emission regs are coming to Europe in 2017. Not only in terms of emissions levels, but non tampering / getting serious about removal of various parts that enable Bikes to pass current and future tests. Many 2ts in many markets come with quite bizzare exhausts with catalyst elements, and / or multiple restrictors. Think of the throttle stops on so many Green Sticker CA 4t Bikes, but much, much more restriction than that.
Hell, my 2T , as it came for road legality, had one bank of the Reed block closed by a plate, a washer with a 20mm hole in it in the exhaust header, a final core ID of 16mm ( on a 500) in the muffler, and a tube in the slide, over the throttle cable, that allowed about a third of the slides lift. That all "fell off", but, I think I might just be up there on the criminal scales with the Axe Murders, in the eyes of authorities.....
Real clean tech will enable 2ts to be full power, with full legality. In many more markets - yes, even CA. It will bring more use of a much better ICE engine, if sanity ever prevails.
Did 4ts have huge price rises and become hugely heavier with EFI? I sure don't recall that, and, if any Did become heaps heavier, well they've certain addressed that since EFIs introduction. Any full size non EFI 4t Motocrosser being made still by the major manufacturers? Any of you Really don't want EFI on your next 4t? Shit, Postie Bikes here in OZ now have EFI.
2ts becoming more expensive? Maybe, as we've been subsidizing 4t production by paying ever more for Bikes that have really changed bugger all over a decade or two. And that may have 'trained' us into accepting an artificially high price on a much cheaper to produce ICE bike that is the 2t, than the 4ts we have now. Here in OZ, I think a 250 SX, is the same price as an 250 SXF, A YZ250 is only about $150/ $200 less than a YZ250F. YZs, no real change til 2015 ( and that, bugger all), KTMs, same 2 basic engine modules since around 98, with only shrinkage of cases / top ends in the case of the 250/300. And, minmalistic interal changes / updates. The first entirely new 2T for nearly 2 decades for KTM is the new '16 125/150 engine. In that time, KTM has developed at least 9 different 4t single cylinder engines, including the vertical split and sloper 'Berg engines. Not to mention their twins and the India made singles. That development and tooling, costs a hell of a lot. Done multiple times, is a hell of a lot more costly than the 2 times KTM will have had with the new 125/150, and the next to come 250/300.
At least lessons learned with 4t EFI / Electrical development will ease 2t modernisation - a bit of subsidisation back, you could say.
We may well see carbs left on 'competition level / off highway' bikes, But, we may have a few with 'new tech' at the same time as the Road legal models - economies of scale may just make it cheaper / easier for manufacturers to use the same fuelling format on all models.
i had a lectron once and as you said, it was night and day experience.
Unfortunately for a less informed and potential buyer who's been running an EFI four stroke, FI has alot of "marketability" and it may be incorporated on future two stroke designs for that reason alone. Look at what the inclusion of a link did for KTM. Somewhat dubious value for the majority of buyers except pro's racing SX but it sure had marketing value that has contributed greatly to their sales volume since it was introduced.
nice read...http://www.lectronfuelsystems.com/docs/Tuning_Instr.pdf
Pit Row
i just wonder how stupid i was selling that thing... would give my left nut to get here back :-(
Careful what yah wish for
I love my Lectron and it's to imagine the manufacturers not using them stock. Maybe Kevin can't provide them at the price point which is probably $75 or something at the OEM level?
Well now that I've read this thread and suddenly,absolutely, need a Lectron now for my RM250... Can one of you guys with them answer a couple questions for me please?.. How well does it fit? Is the bell relatively the same size so it would fit correctly in the intake boot or are modifications necessary? And second.. Does the stock throttle cable work in them?
I would assume that this one would be the right one for my RM..
http://www.lectronfuelsystems.com/carburetor/lectron_44mm_power_jet_hig…
Thank you in advance.
The fit is perfect if your bike uses the longer style Keihin carb. If your bike has the shorter style Keihin or Mikuni carb you can get a Lectron that is machined down to a shorter length, it's still not as short as your stock carb but a lot closer and the fit is pretty good. Worst case scenario your air boot will rub a bit on the shock spring.. Which sounds like a problem waiting to happen but I haven't heard of anyone actually having a problem here.
Bell is the same size as stock on both ends, the body is just a bit longer front to back. If anything the intake side bell may be slightly smaller than on a Keihin PWK-AS, as I do have to tighten down the clamp more to get it good and snug than I do on the stock carb, but no modification neccessary.
I've used it on both a Husqvarna CR144, which came stock with the shorty-length Mikuni TMXX 38mm carb, and on both of my TM's which use the standard length screw-top Keihin PWK-AS 38's. No issues with either, but I had a bit of air boot rub on the Husky. I was able to use the stock throttle cables on all of them, but I tried mounting it up to my 02 CR250 and it wouldn't work with the stock cable. Needed one with more free length as the slide wouldn't drop all the way.
Get one for sure, they are amazing. Imagine a 2-stroke with a perfect, seamless clean idle, 4-stroke like smooth tractable power and gobs more top end than stock. No roughness like you get with a regular carb when it is jumping from circuit to circuit. All this with zero spooge and 50% plus better fuel mileage.
When I first put the Lectron on any bike it starts spooging like crazy.. For an hour or two, because it is cleaning out all of the residual crap left from the stock system. Then it stops completely. No more oily drool even from the powervalve vent tube.
All of this, and no more needles/jets. Just fine tune your metering rod (as easy as adjusting a needle) and two external adjuster screws for idle/power jet, and you're done. Set it and forget it.
Worst case scenario your bike might respond better to a custom metering rod, Kevin @ Lectron knows his stuff and can advise on that. You can cut the length of your powerjet if you want it to take over from the metering rod at a sooner throttle position, you can get a 36mm, 38mm, 40mm, whatever the hell you want. Want your choke circuit cable actuated and mounted on the bars? They can do that. They'll set you up with the correct Motion Pro cable, too if required. I'd be tempted to try a 40mm next time for a 250/300, a guy here has got one on his YZ250/300 and loves it.
Fuel injected 2-strokes? No thanks. I have a hard time believing they will outperform what we have available to us now, and it will come with some great expenses (money/complexity/weight). I don't know anyone with a Lectron carb who is still waiting for EFI to come along, we're good.
checking the GPS route...
So far, most of what I've heard in the past was from woods riders on YZ's, KTMs and Huskys. Are any of you guys riding MX at the intermediate to local pro level of speed with the Lectron carb?
I'm not trashing on anyone's riding here at all. Woods riding puts different demands on the jetting, so I've always wondered if the Lectron would be good for Moto. When I race my YZ300 on a track, the inside of the pipe is tan/brown and dry, even with 32:1 premix and fairly rich jetting. When I race my stock YZ250 in the woods, I have a bit of spooge given the same 32:1 fuel and perfectly crisp MX jetting.
I have zero experience with Lectron, but a buddy went through the motions with ATP on his 250SX (racing motocross) until they finally gave him a refund and he returned their carb. He made it sound to me like it ran extremely lean all the time on the track and even with ATP's help, he couldn't get it dialed to his satisfaction.
I ride/race moto only, definitely out of my element in the woods.
What bike and gas was your buddy using? I know they don't recommend using oxygenated gas without using a specific metering rod for it.
Worst case scenario you hate the thing and sell it for $100 less than you paid for it.. I think it's worth a shot. The Lectron has been ten fold more well recieved than the APT that your buddy tried.
I think the APT is actually the better design, I just hate how they released it without the bugs worked out and expected their customers to do the beta testing for them. Last I'd heard they were still having problems with their suppliers' quality control. Some guys like them but I'm glad I hadn't gone that route.
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