Smart Carb versus Lectron
Posted: Mon Nov 25, 2019 1:05 pm
I bought a Smart Carb2 for my TM last week. Got it Friday. Installed in minutes and uses the stock cable that the TM had for the Keihin. I have a Lectron on my 300 XC-W. It required a special cable (MOTION PRO).
Lectron-No jets, uses a flat surface on one side and round on the other side of the needle. The round side faces the intake or air boot. As air is sucked in, the round side of the needle acts like a "wing" and causes the fuel to be sucked "up" the flat side which has a specific grind and shape to it, bike dependent. Comes pre-set but the needle can be adjusted Up or Down to richen or lean the fueling. You have to take the carb top off to adjust the needle length. It does have a Power jet (an external screw adjustment) which is really just a screw that meters fuel from 1/2 throttle up to WFO to keep it rich/add fuel on top when needed. It does have fuel vent lines. It does have a choke. It does have an idle screw. Once you set it up, you are good to go. Only adjust the external Power jet screw a bit when you go above about 6K feet.
Smart Carb2-No jets, uses a flat surface on one side and round on the other side of the needle. The round side faces the intake or air boot. As air is sucked in, the round side of the needle acts like a "wing" and causes the fuel to be sucked "up" the flat side which has a specific grind and shape to it, bike dependent. Comes pre-set but the needle can be adjusted Up or Down to richen or lean the fueling. You can adjust this with no tools, it is externally adjusted on top of the carb with the bike turned off, to adjust the needle length. It has no other adjustment except a choke and an idle screw. It does not have fuel vent lines. Only a float bowl drain line if you wanted to drain the carb, and the fuel line from the tank. It does not spill or vent fuel to the atmosphere. Once you set it up, you are good to go. Mine is nice as delivered.
Both carbs compensate for Altitude/Temp/Humidity (all though Lectron needs a quick power jet screw adjustment for high altitudes), so you get consistent performance across all the variations you could ride in year round. Fuel economy is really a bonus. I can go over 90 miles on a stock tank of gas and not hit reserve. Did that on day 2 of Hammer this year. That is a big bonus for me. You can ask Boom Boom about how my TE-300 Husaberg top end looked after 120 hours running the Lectron, like new. Cylinder still had nice cross hatch marks and rings were in spec. In other words, perfect fueling.
So the Smart carb after I installed it, fired right up and settled in to a nice idle. It was ~45 degrees sat morning and I was very impressed how quick it started on the button, fired up like it was hot. My Lectron when it is that cold, prefers to be started by the kicker until it is warm. I rode it around and it was crisp and very linear, much like the Lectron except the mid range hit was more "Keihin" like. I am sure the fuel economy will be very similar to the Lectron. Very happy with it. Like that is does not vent to the atmosphere and looks like a piece of jewelry on the TM. More testing to come.
Smart Carb is a bit pricey compared to the Lectron. I like them both, but think the simplicity of adjustment on the Smart Carb2 is awesome, no tools needed for any adjustment. Plug and play!
Lectron-No jets, uses a flat surface on one side and round on the other side of the needle. The round side faces the intake or air boot. As air is sucked in, the round side of the needle acts like a "wing" and causes the fuel to be sucked "up" the flat side which has a specific grind and shape to it, bike dependent. Comes pre-set but the needle can be adjusted Up or Down to richen or lean the fueling. You have to take the carb top off to adjust the needle length. It does have a Power jet (an external screw adjustment) which is really just a screw that meters fuel from 1/2 throttle up to WFO to keep it rich/add fuel on top when needed. It does have fuel vent lines. It does have a choke. It does have an idle screw. Once you set it up, you are good to go. Only adjust the external Power jet screw a bit when you go above about 6K feet.
Smart Carb2-No jets, uses a flat surface on one side and round on the other side of the needle. The round side faces the intake or air boot. As air is sucked in, the round side of the needle acts like a "wing" and causes the fuel to be sucked "up" the flat side which has a specific grind and shape to it, bike dependent. Comes pre-set but the needle can be adjusted Up or Down to richen or lean the fueling. You can adjust this with no tools, it is externally adjusted on top of the carb with the bike turned off, to adjust the needle length. It has no other adjustment except a choke and an idle screw. It does not have fuel vent lines. Only a float bowl drain line if you wanted to drain the carb, and the fuel line from the tank. It does not spill or vent fuel to the atmosphere. Once you set it up, you are good to go. Mine is nice as delivered.
Both carbs compensate for Altitude/Temp/Humidity (all though Lectron needs a quick power jet screw adjustment for high altitudes), so you get consistent performance across all the variations you could ride in year round. Fuel economy is really a bonus. I can go over 90 miles on a stock tank of gas and not hit reserve. Did that on day 2 of Hammer this year. That is a big bonus for me. You can ask Boom Boom about how my TE-300 Husaberg top end looked after 120 hours running the Lectron, like new. Cylinder still had nice cross hatch marks and rings were in spec. In other words, perfect fueling.
So the Smart carb after I installed it, fired right up and settled in to a nice idle. It was ~45 degrees sat morning and I was very impressed how quick it started on the button, fired up like it was hot. My Lectron when it is that cold, prefers to be started by the kicker until it is warm. I rode it around and it was crisp and very linear, much like the Lectron except the mid range hit was more "Keihin" like. I am sure the fuel economy will be very similar to the Lectron. Very happy with it. Like that is does not vent to the atmosphere and looks like a piece of jewelry on the TM. More testing to come.
Smart Carb is a bit pricey compared to the Lectron. I like them both, but think the simplicity of adjustment on the Smart Carb2 is awesome, no tools needed for any adjustment. Plug and play!