Frequently Asked Questions
This is a must for a two stroke engine. We prefer to have them on all types of engines two or four stroke. The power jet carburetor can give you a wider range on tuning and also helps you fine tune top end power on all types of engines.
The standard Lectron carburetor has a 2mm taper. For example a 40mm carburetor will start out 40mm and taper down to 38mm at the fuel pick up then taper back up to 40mm. The Lectron High Velocity carburetor has a 4mm taper. For example, a 38mm HV carburetor will start at 40mm and taper down to 36mm at the fuel pickup then back out to a 38mm. This carburetor was first designed for racing classes that had a restriction on carburetors size. This was Lectron’s answer to have a small carburetor work like a big carburetor. The Lectron High Velocity carburetor is also used today for bikes that do not have much “port speed”. Engines with a small amount of port speed have trouble picking up fuel efficiently this carburetor corrects that. Final note, many people put Lectron High Velocity carburetors on engines not understanding why? Just because of the name “High Velocity” they think it is a better carburetor than the standard Lectron.
Don’t confuse the issue.
The idle on a Lectron is adjusted with the metering rod. If your motor runs good except idle you will have to first determine weather it is rich or lean causing your poor idle. With engine off look at your slide height. (this is the cut away in the carb slide) If the slide height is high (all most at the end of the adjustment) then the engine is rich. If the slide height is low (all most closed) then the engine
is lean. "example motor idles poor or very or low RPM and your slide height is high. You need to lean out rod 1/4 turn reassemble and retest. The RPM should go up and you should have to lower slide. If this is not enough repeat sane step until RPM goes up." You can do the opposite if the engine races or has very low slide height.
The power jet is for high speed tuning only. The power will kick in about 3/4 from top RPM First get the motor running good at idle and mid-range then work on the power jet. The power jet will not effect the tuning of idle, mid-range, or response on the carburetor.
Yes, first you must have a power jet carburetor to start with. When you are using the carburetor for a 2 stroke engine you must add an additional power jet, for a total of two power jets. For a 4 stroke this is not necessary. he other modifications is changing the needle & seat and metering rod. We HIGHLY recommend using a fuel pump to keep proper fuel flow. We have found with Alcohol applications gravity feed is not sufficient.
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The float level can be checked in two ways. With float bowl removed and carb upside down, float "brass" arm should be parallel with the float bowl gasket surface. When carb is assembled gravity fill the carb and the float level should be between the 2 lines marked of the float bowl.