Maintenance & Technical > KX500 Original

Lectron Carb. Questions

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Arigato:
What size are you guys who have them running?  How much HP did you gain?  How much bottom end did you lose?  Hard/easy to dial in?

Thanks!

kaw rider:
most guys are running 44mm

monster malibu:
Where can you buy a 44mm lectron?

don46:
The link below describes the tuning of a Lectron carb, It's quite easy, not as easy as a PSI Big Air, but close. I don't remember losing any bottom end, so it must not have been significant. Stewart is probably the only person with Dyno results and those are more than likely a combination  of several mods. Seat of the pants feel, there seems to be a big gain on top end. I've had a 44mm for about 6 years, each year I'd get it out, try it again, and decide my KX 250 40.5 mm carb worked better, back on the shelf it would go till the next year and the process started over.  This trial and error was on mostly stock motors, Once I tried it on a ported motor I was sold, I think that I was over carbing before, couldn't get enough volume through with stock porting. Anyway, it works well and seat of the pants you can tell a difference, I use a 44mm with a XL4-2 needle.

http://kawtriple.com/mraxl/carb/lectron/lectron_tuning.htm

stewart:
that is a good chart ..the new carbs use longer needles  2.050  there the xl series ,,,ps..why do all the pro stock nhra bikes use lectrons if there is something faster

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