Posts
1350
Joined
10/1/2011
Location
Highland Village, TX
US
Edited Date/Time
6/11/2018 5:01pm
I've been looking at getting a Lectron Carb for a 2006 YZ250 two stroke. Has anyone tried the newer HV version of it? If so how did you like it?
I ask as I've heard mixed reviews on these. Some say they work fantastic. Others say the stock carb can perform as well or better.
I ask as I've heard mixed reviews on these. Some say they work fantastic. Others say the stock carb can perform as well or better.
Put one on my 06 cr250. I normally run at sea level, but took it to 4k elevation and still ran great.
And did it help fuel mileage too?
The Shop
The first time starting the bike up after getting it warmed up it rev'd noticeably cleaner and quicker. It starts very well now that its jetted correctly. And comes on the pipe with a lot more authority. Once the powervalves are open it has a good bit more power and revs further. It also has a gnarly pipe on it which also focuses on power down low. I tried the DEP and didn't like it as much. I also taper bored the carb (I'm a machinist). I didn't feel much difference in that as I did it after adding the STIC.
Ive never really measured fuel mileage. I can still race a 1 hour HS on a stock capacity tank and have fuel left.
I get longer ride times with the Lectron and 7.5L tank than I did from an OS tank and the stock carby.
At first it wasn't dialed in right, since I got it as soon as the bike was out (never even rode it with stock carb). So initial Lectron settings were way off. The bike needs to run richer than previous models.. so their 2016 data wasn't applicable. Had some back and forth with Kevin and ended up sending it back. He did more testing and fired it back to me and now we're good to go.
No stress on my end as I knew I was one of the very first running it for MX on the TC/SX platform. Saw it as helping them get dialed.
I love it. Bike runs super crisp. Never any goop coming out of the pipe. I run 50/50 mix VP + pump gas at 50:1 Motorex. Southern California. Bike runs great. I fucking love this bike.
LOL... "I fucking love this bike". Now that was funny!.
They are really good and I think the bang for the buck scale would put them over a pipe or other similar mods.
Needles to say, I like them.
Pit Row
there is really only two reasons for wanting a Lectron. wider operating range (without re-jetting) and better fuel economy.
if those two things don't interest you, then the carb offers almost nothing over a properly tuned traditional carb. If those things do interest you, then this carb is a no-brainer.
so, in short, I can't see needing this on a moto-only bike. but for off-road use, it's pretty much the bees knees.
.
I race woods races but they are only 1 hour so fuel mileage isn't a concern. And in Alabama there aren't any places were you need the wide operating range because of a difference in altitude.
They smooth out the power. Think less coarse pulses of the engine. Same power available but not so abrupt/rough feeling. Great for off-road.
Definitely an improvement in milage and elevation capabilities.
Mine was in the ballpark when I received it from Lectron. They helped me set it up better via email but also tried to upsell me on a new and improvement metering rod which was shaped to be leaner on bottom and richer on top. I thought this was annoying but it also displays a continuous improvement in development.
All in all it is ok and the company does not completely abandon you after the sale. It is very high quality and not cheap looking like a stock carb.
I am not completely convinced it's the end all and be all but it was the compromise I was looking for.
Dave recommended the 36mm. It fits well enough, with just a tad extra compression on the boot, but not enough to distort it.
My biggest issue is the throttle cables from them. The first one was far too short, so I ordered the "Long" unit for factory routing. It has a huge metal adjuster that I had to cover with vinyl tubing so it doesn't eat into the underside of my tank and inside frame and it just barely has enough length when I turn it full lock right, but it is safe. I'll run it a bit then get a proper cable custom ordered that doesn't have the damned mid-cable adjuster.
I am firing it up tomorrow for a few heat cycles and will hopefully get out later this week to see just how it responds compared to my well jetted OG Mikuni. I'll report back after I get back from a goon ride or two.
YES. I LOVE the damned Lectron.... It was a bit rich from Dave & Co. during the three initial 10 minute heat cycles I did. Smoky Puppy. No problem. Remember, this is a rebuild to include ALL, only the case inner/outer halves were reused. No expenses spared, over $1400 in OEM internal parts alone. Fuck it, I have the $$$ and made the time. I leaned the "metering rod" 1/4 turn after the cycles and it is the best mod for the $ for ME.
We ripped up my yard and if I had limited $, I'd say go Lectron. Way better choice over pipes/silencers/bling. Just make sure you get a good "Slide Snap" when releasing the throttle at any bar position between and including FULL left and FULL right to the locks.
It is up to you to route cables correctly/safely. I got the crap they sent working sans issue, and will now get a few custom cables made to ensure my safety and proper performance. Read my complaint about the stoopoooopid mid-cable adjusters...
I have an 07' CR125 I am restoring and it will also get another Lectron. Lug to SNAP in 3rd is worth every penny.
I gotta go... Need to load up for HIGH POINT!!!
EDIT for Stoooopid mid-cable adjusters spelling
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 ?
Old thread is fine by me...
A fate would have it, my buddy just last week got an Lectron HV 38mm for his 2013 YZ125 after riding my 05' CR125. He got it installed and then had fly off on a business trip.
It'll be about two weeks before I'll be able to ride with him and check out the Lectron HV 38mm on a YZ125. I'll post back with the upshot.
I also got another Lectron for my 07' CR125 build (HV 38mm), but got a lot of work to do to finish it. Lectron is recommending the HV 38mm for CR/YZ 125's now for improved bottom and all-around better performance.
I still think it is an excellent unit!
I haven't ridden one and don't know the facts first hand, let me say that right up front.
I have had friends use them and get rid of them.
They seem to run lean and very clean. Perfect for a woods rider, or a beginner / novice.
The faster guys spend less time at lower RPM and light engine load. A and B guys are more often at part throttle or WOT with a heavy engine load. I really think this is why the reviews are mixed.
Was that billet carb called Smart Carb? My buddy had one on his 250SX when they were new. He wanted to love it, went back and forth on tuning with the guy who developed it and in the end they both decided it wasn't going to work for his level of motocross racing. I relate that carb to the lectron in the way it runs.
Again, I haven't owned these carbs, but I'm curious about them and I share the same opinion as your faster buddies, although I'm no pro, just a Vet A guy.
https://www.youtube.com/watch?v=MVAtN4khV7M
Is it a perfect carb? No, but once dialed in, is a great all around carb that is useful enough that I bought two. YMMV.
That's a good counterpoint to the negatives I've heard about these carbs. Like I said, I don't have a lot of first hand info on them, but they always seem to be set up lean and they run very clean.
Post a reply to: Lectron Carb - YZ250 2 stroke