Lectron Carb - YZ250 2 stroke

Grinson
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Shelton, WA, USA
Grinson 6/5/2018 11:20am
6/5/2018 11:20am
I've bought a Lectron 38HV model from a member. It has the 4-2 metering rod.

In your experience, what are the best settings for an unmodified YZ250 engine (w/ aftermarket exhaust)? I only do woods with back-country roads, so I'll hit the rpm spectrum, but will typically run at lower RPMs.

Reading online, it seems the 4-2 rod at 2.020” is what is recommended. However, wanted to know what others have found works well (0-3000' and 40-90F).
PTshox
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Highland Village, TX, USA
PTshox 6/5/2018 11:26am
6/5/2018 11:26am
I picked one up as well. Mine has a 4-2M in it. I'll write up a review a bit later
Markus422
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Seattle, WA, USA
Markus422 6/5/2018 11:49am
6/5/2018 11:49am
Anyone have experience with the Lectron on a KX500?
Blais Bubba Lawson 6/11/2018 8:46am
6/11/2018 8:46am
Jterry wrote:
Derrick Harris has dyno'd the smart carb and lectrons and came to the conclusion that they aren't any better at making HP than a properly jetted...
Derrick Harris has dyno'd the smart carb and lectrons and came to the conclusion that they aren't any better at making HP than a properly jetted stock carb.
but they allow ur bike to rev higher n make max hp longer!!!

The Shop

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Blais Bubba Lawson 6/11/2018 8:58am
6/11/2018 8:58am
YamahaJT1 wrote:
PTshox, here is the BizNatch...[img]https://p.vitalmx.com/photos/forums/2017/06/15/200405/s1200_Final_2005_CR125_038.jpg[/img]
PTshox, here is the BizNatch...

Tarz483 wrote:
Wow this thing Is beautiful I know it's an old post Bla bla bla , isn't that the beauty of Vital All this awsome saved info...
Wow this thing Is beautiful
I know it's an old post
Bla bla bla , isn't that the beauty of Vital
All this awsome saved info ?
I was researching
Lectron carbs I would love to Try one on my YZ125
Anybody else tried one on a 125 ?
u will love it for the extra 500 foot of revs
PC
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PC 6/11/2018 9:19am
6/11/2018 9:19am
Lectron's make 'old man' power. Soft down low with no hit into the mid/top.
I've been running Lectron's since 2013 in my woods bikes and can never get is crisp and lively feeling as a PWK carb.

However, since I'm woods riding and trying to squeeze 80+ miles from a 3/gal tank I'm okay with that. They probably pull a little more up top vs. a standard carb, but honestly whose spending that much time at WOT. I wouldn't consider the Lectron a performance upgrade at all. It's a fuel mileage and ease of jetting upgrade only.
Grinson
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Shelton, WA, USA
Grinson 6/11/2018 2:18pm
6/11/2018 2:18pm
PC wrote:
Lectron's make 'old man' power. Soft down low with no hit into the mid/top. I've been running Lectron's since 2013 in my woods bikes and can...
Lectron's make 'old man' power. Soft down low with no hit into the mid/top.
I've been running Lectron's since 2013 in my woods bikes and can never get is crisp and lively feeling as a PWK carb.

However, since I'm woods riding and trying to squeeze 80+ miles from a 3/gal tank I'm okay with that. They probably pull a little more up top vs. a standard carb, but honestly whose spending that much time at WOT. I wouldn't consider the Lectron a performance upgrade at all. It's a fuel mileage and ease of jetting upgrade only.
From my research, it really doesn't seem like a worthwhile upgrade for motocross (so vitalmx may not be the best forum to discuss it!), as I feel most people going to a track are going to be able to easily jet for the elevation/temperature, and they won't benefit from the mileage or anything - especially on a 125 where you're WOT!

I got mine as I only ever ride woods, and I don't want to deal with the jetting and enjoy the increase in mileage.
yz763
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Altamonte Springs, FL, USA
yz763 6/11/2018 5:01pm
6/11/2018 5:01pm
I have about 10 hours on my TMR YZ295 with MX porting and Lectron carb. I think I have the 5-2 metering rod in mine. I am a Vet A rider and love this thing. The bike is smooth, crisp and and incredibly fast. I really can not understand why anybody would have anything bad to say about these carbs. They are awesome!

Pit Row

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