I received the latest version of the four stroke
Lectron a couple of weeks ago to replace my RB Designs FCR 41 but have been a little slow getting it installed because of and bad wreck that involved broken ribs and a collapsed lung.
Anyway, yesterday I decided to put it on my TE450 because it is much easier/faster to work on because of all the junk I have on the 610 like the IMS tank with it's 5 fuel lines :-). My 450 and 610 share almost exactly the same FCR jetting so I thought why not do the tuning on the 450 then put it on the 610?
So after putting it on I hung my small tuning gas tank on the handle bars and was prepared to make a needle adjustment or two before putting the real gas tank on but mush to my surprise after an idle adjustment and 3/4 of a turn on the air bleed she was purring like a kitten at idle and reving effortlessly with no black smoke.

I rode it around on my small practice track and up and down the driveway and was really surprised at how good it was running. No popping on decel but not a hint of over richness. So it was off for a 25+ mile gravel loop that I can make from my driveway. Very good throttle response and rock solid idle after getting it good and hot

My butt dyno says it has more roll on power and a stronger top end but it is hard to say but the bike is for sure running smother and seems happier. I did have a flame out or two when going slow in the trees on my practice track but it may be due to my timidness because of my sore ribs. A buddy of mine (Cliff) rode it for quite awhile in the same places with
no flame outs.
Oh and I traded bikes with Cliff when riding the gravel loop yesterday and had a hell of a time getting the bike back.
I'm anxious to talk to Kevin at Lectron to find out what makes this carb different from the last one I tried.
More to follow after more riding but I think Kevin has hit one out of the park