Lectron carb tuning guide

I keep meaning to ask but been super busy. When I first start bike it does this bulb bulb bulb thing and if I give it gas it quits, it does this till its warm then runs absolutely perfect. So does this mean I should twist it one quarter turn richer or leaner for this starting weirdness?

With the choke on ?

yes. Its not a big issue though as if I let it run for a minute or two the issue goes away. Just when I first start it

How do you initially set up the metering rod, from scratch?

Thanks

Hi all,
I've installed my Lectron as shipped with the 3-2m rod and it was pretty close perfect, just needed to turn the PJ 1/4 turn leaner (in).

Bike ran great but was a little bit rich with low throttle openings, IDLE screw was adjusted more than 1,5 Turns out, too much "tatatata" with 1/8 throttle and steady speed , much smoke and the last ride I fouled a plug.

So I decided to try to lean the rod out by 1/4 turn. That made a big difference !, had to lower the idle screw some turns. Idles better now and is more snappy on the throttle, a lot less smoke and she runs smooth with steady low throttle. That are my actual settings right now:

IDLE: 1,3 Turns out

PJ: 1,4 Turns out

From TIP to BRASS body: 51,6mm (was 51,4mm shipped)

From TIP to Plastic part: 51,1mm

Does this look ok to you ? I find it strange to have so much tip length as the standard value should be "just below 50mm".. Is 51,6mm to lean ?
Regards.

With my rods I have at hand and with my testing/modifying, A range from a tad under 48.5mm to, 51.3 is what I have written down depending on bike/rod so its quite variable. Get it set right and forget about it and enjoy never having to play with brass ever again, Total bliss

Have a quick question and was wondering if anyone had some input.

Have a 36mm on a 13 cr144 and it's performing very well but had two small issues so far. It currently has the ms3 rod and short PJ tube installed. When I first start the bike it will idle fine. After it warms up a bit(2min ish) I noticed that the idle is inconsistent to some degree. By that I mean if it's sitting there idling if I give it 1/2 throttle it'll come down clean and go to a real low idle then die. If I give it very small throttle inputs to maybe 1/4 throttle it'll come down to the higher idle and sit there. The other thing it does so far is if I'm cruising down a road with just the throttle barely cracked it's also inconsistent. I don't want to say it's surging but you can hear and slightly feel it's not clean.

For settings I'm around 1.25 to 1.5 T out on idle. I'm still playing with the PJ but it's currently 1T out and I need to dial it in between .75T and 1T. I can't tell you the needle height but I just went 1/4T leaner 2 rides ago and it felt better during actual riding. It rev'd quicker/cleaner off the bottom and the mid range sounded and felt a bit stronger.

I'd go leaner on the rod, if it liked 1/4 turn go leaner and see how it responds. I had to go 1 1/2 turns leaner to get my WR250 perfect.

My thinking is that if 1/4 turn leaner made it better then keep going and give it what it wants so to speak. I recommend setting the power jet last since it overlaps the needle on the top end. Once the needle was set my Lectron it would idle crisp in gear for a long time, even with a little clutch drag. (clutch pulled in 1/2 way with one finger while I decide what line to take at a bottleneck or a really gnarly section).

Hey, does anyone know if lectrons 3-1m and Kelly's MS3 are the same? I was told they are. I am tuning a 38mm on my 144 with a 3-1M rod. It is running great everywhere except when the revs drop on an incline. Then it just gives up. Does the MS3 offer better lugging ability?

Went another 1/4T leaner on the needle and was even better. The very slight hesitation when cruising at high gear with barely any throttle seems to be gone. The idle stick acts a little bit funny but it doesn't actually effect the bike in any way while riding. PJ seemed to feel the best at 1.125 to 1.25T out. Probably just going to leave it now as it works great.

Thanks for the help

Ok, I'm kind of a lurker here, but thought I would stand up and be counted. I emailed back and forth with Kelly about a Lectron for my KTM 300. Ended up ordering one and it got here pronto, I guess because Lectron is out of Texas and I'm in Okla. Got the MP throttle cable also. Only a small issue with the cable adjuster on the carb but I t that was quickly rectified by Lectron and Kelly.

I cut the boot and mounted the carb, ran the new throttle cable and it started right up. Couple of kicks, after it was warmed up, the button work to start as always.

Took the bike out for some "jetting" runs the next day. Started out and just rode for about 30 min to make sure we didn't have any infant mortality. It held up great and was running as good if not better than with the stock carb. Headed back to the truck and pulled the plug, it was a little rich.

On my bike, to get at the carb, I pull the seat and the tank to get a unobstructed shot at the carb. Pulled the slide and started a 1/4 turn lean on the rod. Buttoned it all back up and started it up, button started it right up. Adjusted the idle a little and rode it around a little, not real fast but not just putting around. Pulled the plug again and it looked great.

I was at a lake with some long open beaches so I could get some long high speed runs, sand was nice and firm close to the water. Got some good 6th gear runs. Anyway put in a new plug and did some modified chop runs and the plug was looking a little rich so I took a 1/2 turn out of the PJ. More runs and the plug was looking really good. So I left it there and went and did some riding up in the woods. Very responsive off the bottom and a lot of fun, really scoots coming out of the corners.

This was last Friday and I had been invited by a friend to go over to SW Missouri to run in a Hillbilly GP. Wasn't sure about going this soon with a new not well test carb on my bike. But after Fridays "jetting" session I was pretty jazzed so I loaded up and we went racing Sunday.

I got good news and I got bad news. The bike/carb ran flawlessly, but I broke about 3/4 through the first lap of the race. It was a spring in the shift mechanism, go figure. Coarse was tuff, long steep up hills and the same on the other side of the hill but your nose was pointing down. Nice to have all that KTM 300 grunt and the Lectron provided the go juice perfectly. Not even a hiccup, only thing I did to it was adjust the idle up a little. Just wish I would have had more time on it in those conditions than I did.

I'm really liking what it's done for the bike, runs better with more power and smokes a lot less. Not sure about the fuel mileage, but I expected it to be as advertised. Maybe the aftermarket jetting kit and blue needle didn't have me as optimal as I though? I'm no carb wiz, but this thing really adjusted quick and easy. And there is really a lot of good information here that helped me out.

So thanks to Kelly and Lectron and all the contributors here.

Hey guys.

Just got a lectron put on my 2000 cr125 husky with pro circuit expansion chamber and nature friendly silencer.

First kick on the choke fire off, few revs later took the choke off. Seemed like it was idling a bit high so I took a turn out of the brass screw on the left side.

Idles perfect but when I rev it 3 or 4 times consecutively the idle hangs up afterwards and takes 20 seconds of idling before it comes back down to a low idle.

I just got it up to temp am going to run it up and down my street in a few hours to test the rest of the operating range.

Anyways question is does that mean the lower range is rich or lean? Or is that normal for a 2 stroke to hang after quick hits of the throttle?