I have an Ecotrons EFI on a pmz19-50 Maddog. The motor is a qmb139. First up the fuel pump they send you is junk I purchased an EFI In tank Fuel Pump for Triumph Motorcycle Scooter. Punched a hole in my gas tank and made my own version of a sending unit to hold the fuel pump inside the tank. I also replaced there plastic fuel regulator with an adjustable one with a Gage on it. Now to power this "better" fuel pump. I swapped out and rewired both my headlights for low wattage led lights. switched all turn signals and tail lights to led. I also floated the ground on my 8 pole stator and installed a 12V Full-wave Voltage Regulator Rectifier GY6 50cc. Now to be able to hold the throttle body I purchased a intake for a 150cc gy6 and the insulator gasket for a 150cc gy6. bolted up a Little reprogramming of the efi controller and bam running good. Now I noticed where the intake met the actual motor there was a large lip on the motor side. So my intake was going from a 28 mm hole to an abrupt 18mm hole, so I pulled out the trust dremmel and port matched and polished. At this point the motor runs as I would expect it to no bogging no hesitation and I can get to 40mph which is the speed limit on the roads I drive much faster then the cars sitting beside me and up even a decent grade hill I can maintain 40 MPH. I do not know what my top speed is yet because I always just keep up with local traffic.
If you would like a link to every part and or a copy of my ecotrons cal file let me know.
Full mods list
Ecotrons EFI
Fuel pump from a triumph motorcycle
Adjustable fuel regulator
72cc BBK
a9 cam
7 gram sliders.
150cc intake
full wave voltage regulator
Led lights all around.
Floated ground stator "I left the cdi AC by leaving the winding for the cdi alone"
Pod uni foam filter.
Custom made exhaust no restrictions.
Now most if not all of the parts I link can be purchased elsewhere or maybe better quality ones. The links I use are just the ones that I purchased and from where. Feel free to link better items if you know of them. Yes I would love to have a Hoca BBK and a stroker crankshaft, but that is all to expensive for me.
28mm Throttle bodyFuel pump slanted would have fit betterCDI from scrappydogscootersFull wave V regChrome fuel regulator not needed I wanted chromeA9 cam72cc BBKThe beginningsome items form Scrappdogscooters directlyPERFORMANCE IGNITION COIL
High energy ignition coil boosts that weak spark into a real shocker. This will improve starting, acceleration, and fuel mileage. This is plug and play for GY6 scooter atv 50, 125, 150 engines in 152QMI, 152QMJ, 157QMI, 157QMJ, 139QMB, 172MM, CF250, and all other 4strokes. As on all performance parts, no guarantee, as these parts will not fix a problem you may have elsewhere. Fits all Chinese 4stroke engines as well as your budget. $19.
CR7 Iridium Spark Plugs
Longer life, more stable spark energy are just some of the benefits of our Iridium spark plugs. Get them here cheaper than anywhere else as always. $9.
High performance air filters
High flow performance air filter, clamps right onto your carburetor. Small profile to ensure tight clearance fits. Some 150's have a suspension cross member that interferes with filter installation. Not this one. Fits Tank, Sunl, Roketa, TNG, TGB, JMstar, Jonway. Just about any scooter, atv, buggy, dirt bike, etc. Two sizes for the common carbs. 38mm for the 50cc carb. 42mm for the 150cc carb. $9.
filter size option
Performance aluminum intake manifold
Tired of your intake boot cracking and leaking? Want to get the most performance out of your stock or performance carb? These are the ticket. Smooth inlet porting allows for laminar flow that promotes power, and solid aluminum contruction keep that rubber from getting old and cracking. There is a vacuum port nipple on this manifold, just not in this picture.This manifold not only fits 24 - 32mm carbs, but it also fits your budget $24.
Another pagePerformance roller polygon sliders 16x13
These are probably the best bang for the buck if your still using those old round rollers in your variator. These will spread the load pressure to help broaden the range of variations as sticking is greatly reduced. So in the end, you will get the performance of a lighter and heavier weight roller, in one package, and last longer to boot. Just as good as Dr. Pulley, but much better price. $19.
These come in 4g, 5g, and 6g now. Lighter weight give you more engine revs.
choose your weight
And anotherCarburetor intake manifold insulator
Cheap little parts, but immanently necessary. These tend to crack and cause havoc with the way your engine runs. Don't take a chance. $2.
How to float the ground and leave CDI as ACAnd remember to re wire your headlights to run off dc power...
Starting.. yes I know my valves are loose .004 to be exact.
The full picture
Exhaust yes I plan on making it much prettier.......
The gas tank Modded. I plan on having a custom aluminum tank designed and made.
I know it is not the fanciest of setups but as time goes on I plan on installing and cleaning up the design to make it more appealing.
