GOOFIT 44mm Cylinder Carburetor Air Filter Ignition Coil Set Big Bore 53cc 54cc Top Kit of Piston for 47cc 49cc 2-Stroke Engine Pocket Bike Atv Quad Motorcycle Red

What can I say. Very nice kit overall and you can feel the difference in performance over the stock engine. I had to add a base cylinder gasket though because the piston was hitting the cylinder head. I wish they would have provided a throttle cable for the carburetor because my stock one would not fit so be prepared. All in all, 100% satisfied!!

So I’ve had a lot of issues already. I originally got this kit and one of the piston rings were broken in half so I had to return it to get another kit. I’ve just recently got the new kid and I’ve realized it doesn’t fit my crankshaft. Luckily go fit has a crankshaft that supposedly works for you, I hope you are hands-on with turning wrenches because this is going to be a project in all pretty good for the price. The carburetor is excellent and it seems to be pretty high-quality for the price.

The head is not perfectly level, I can feel the piston getting caught up when I tighten it down completely.. might wear in but I’m having multiple issues. Bad stuff: 1) the head might need to be leveled 2) the carburetor needs the stock jet changed out to a smaller jet, I swapped for a 65mm and it’s better but I’m gonna try a 60mm. The bike was getting way too much gas with the stock jet, like I was full throttle.. 3) the carb throttle connection is a weird one. You put it through the front and hang the knob out the hole and it fits in behind the slide into the carb. I shoulda took pictures to help people like myself. 4) The throttle kinda sticks I feel like the spring is too soft.. 5) Bike wants to go without touching the throttle, 6) bike will only idle with choke on, its kinda hesitant, then gets spurts of power, then wants to die if I let off the gas when riding. maybe due to uneven head and piston sticking… Good thing is, definitely more power! Phone said 26 but I didn’t max it out cause of the new build. Wanna figure out the tune and break it in before trying to hit max speed. I shoulda just got the red version due to the fact that it matches the rest of the aftermarket parts that are available on Amazon, not many gold accessories or deals on what there is. Might just return it if it gives me problems for more than a week.. it’s the same size 44mm piston as the stock piston, both are 44mm, only difference is 2 little windows bored out of the side of the new one. Could easily be dremaled out of the stock piston. I’d recommend just a 47mm head and piston kit, and doing some research on tuning and improving your stock carburetor or the NP carbs, they are much more tuneable than these HP carbs, I think you could get the same effects if you figure it out, I might have to go back and follow my own advice here. Waist of money for my case, so far anyway I’m not happy with the kit.

Everything fit besides the carburetor other than that so far so good more power sounds great The most important part is tuning your engine. If you run it to lean the motor will blow up at the moment will buy again

Everything fit, and worked. Bike has better mid range acceleration and a higher top speed after installing these upgrades, engine has more compression as well. I did have to experiment with different size carb jets, and had to adjust the idle a bit to get the engine running perfectly. Great bang for the buck.

Muy buena presentación

Everything fits great, but the spark plug was bad out of the box. Thats my only complaint, if you buy this be ready to also buy a spark plug.

I put this kit on a 50cc 2 stroke motor I bought off Amazon and you can tell a big difference. Only suggestion is to make sure not to over tighten the carb intake flange bolt it will snap. Youtube how to install the kit. Really simple once you dive into it

Ottimo kit per modifica

Es la misma cilindrada que el original con orificio de escape mas pequeño pero con la culata y culatín diferentes , estéticamente mas bonito y rendimiento parecido, Con una.Buena bujia ngk R y unos muelles de embrague mas duros (que no están en amazon), unas laminas de carbono es suficiente para un ajuste sencillo y duradero

Just refurbished the engine and installed this no issues at all, now to strip and paint the rest of the quad before I try it other than on the floor.

lo monte todo con facilidad y sin problema. arranca a la primera y es bastante potente.

Montato il kit come venduto. Ho aggiunto albero a spalle piene e pacco lamellare Polini..veramente soddisfatto...un consiglio che do..mettete del frena filetto sui tiranti del cilindro perché con le vibrazioni e la dilatazione termica si svitano...veramente soddisfatto.la mia mini e cambiata e si alza che e un piacere...CONSIGLIO A TUTTI .con pochi soldi si ha un buon risultato .