Junak 903 50 4T - parts - Gmoto - Page 4

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Junak 903 50 4T - Page 4

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Products reviews

2024-09-18, 07:16

poland

Richard

Cylinder + head 72cc 4T

I received the cylinder ok, but for the cylinder head : - No spark plug screws to be replaced, - bent exhaust valve and valve gasket out of order (recommended elsewhere), - major machining work to make it watertight. The intake pipe is too short to fit a 139 FMB, so it's useless. The paper gaskets are also of very poor quality, as are the piston rings. Very disappointed with my purchase and no possibility of complaint from France. Chinese parts of poor quality, next time I'll go directly to ali for this quality.

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2019-10-13, 21:34

poland

Szymon

Complete cylinder 72cc 139FMB 4T

I installed in a 2010 Barton Fighter moped. After mounting the moped clearly came alive, it became very sprightly, the top speed also increased. After starting from first gear it can sweep the wheel, and after releasing the clutch faster it stands on the wheel, also when shifting to second gear the front end likes to lift gently. Overall, for this price I can confidently recommend this cylinder to everyone. I recommend 100%

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2021-03-22, 17:50

poland

Sebastian

Carburetor with cable choke 4T tuning

Zipp Neken 2 50cm3 2019 Installation of the carburetor very easy. Just screw two screws from the carburetor mount, put the throttle on the cable, screw the throttle. Install the air filter. Put on the fuel hose. Put on the manual suction line. I rate the installation of the carburetor as very easy even with no knowledge of mechanics. The carburetor after installation is pre-adjusted ready to drive. Recommended.

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2020-03-05, 17:33

poland

Arkadiusz

Manual Choke Carburetor 139FMB 4T

Moped gb Street 50 , on the old original carburetor muddied up on cold engine. No power despite the adjustments made. Today after installing a new carburetor moped revived, a noticeable improvement in engine performance that I had not decided earlier to make this purchase only agonized and combined like the proverbial horse uphill . I recommend this carburetor. It is really worth it.

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2019-10-18, 13:05

poland

Zbigniew

Complete cylinder 72cc 139FMB 4T

I have a Junak 901,I bought this kit because the motorcycle was already quite weak. I did the assembly for the first time, and it took me some time. So far I'm lapping , and I have no problem. I think Moretti products , are good parts and recommend.

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2024-09-27, 21:24

poland

Paweł

Cylinder 50cc 139FMB 4T

Fast delivery, very well packaged and complete in 4 words everything you need is. The company (site) wholeheartedly recommend and noti once again I will stop by and buy because it is good and specific

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2019-10-04, 17:39

poland

Dawid

Brake pump

Zumico gr 500 engine rearranged from a 125cc cross, master cylinder with installation went fast and everything is okey. I have owned the motorcycle for more than 7 years everything done on time and with heart

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2020-09-13, 21:08

poland

jerzy

Voltage regulator 2T 4T

Super case company reliable and fast shipping I highly praise this company and highly recommend. I am satisfied as much as possible with everything I bought everything fits barton ranger clasic motorcycle

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2019-11-03, 07:53

poland

RAFAŁ

Crankshaft 4T 139FMB

I bought the shaft from Gmmoto I put it on the engine Everything fits Engine runs like gold The shaft is well made and brewed, nothing beats, no knocking, no rubbing .ENGINE AS NEW I RECOMMEND

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2021-07-22, 06:27

poland

Szymon

Complete cylinder 72cc 139FMB 4T

Recommended website fast shipping all forms of payment with quality I'm satisfied with the cylinder everything laughs as it should so I recommend!

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2020-06-23, 18:59

poland

Jakub

Bulb 12V 35/35W BA20d

The bulb, like a bulb, shines, even very well. When driving at night it illuminates the whole road well, the color is rather yellow, in my classic it looks great.

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2019-01-08, 14:20

poland

Monika

Timing chain tensioner set 4T 139FMB 154FMI

Timing chain tensioner kpl 4 t139 fmb very good class very well made with attention to detail fits without any problem I recommend to everyone

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2019-02-03, 14:38

poland

Jakub

Manual Choke Carburetor 139FMB 4T

Very good quality there is no better I really recommend and the price very attractive And in general I recommend this store good prices and quality

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2024-09-18, 07:22

poland

Richard

Carburetor ebonite washer with O-ring GY6 4T

Ebonite carburettor washer with GY6 4T O-ring has not been installed, as the pipe is the wrong size

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2019-08-20, 15:30

poland

Paweł

Starter Relay GY6 4T

I have a moped dafier yankee 50cm product very well made and the starter relay works 100 percent in the moped

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2019-01-08, 08:25

poland

Monika

Output shaft 4T 139FMB ball bearings

4t 139 fmb ball bearing take-off shaft very well made with attention to detail fits without any problem recommend to everyone

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2019-01-08, 07:22

poland

Monika

139FMB 50cc engine gasket set

Set of engine gaskets139 fmb 50cm3 very well made with attention to detail fit without any problem I recommend

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2020-09-07, 09:14

poland

Krystian

Carburetor nozzle 0.78mm 110cc 4T

Nozzle an important element when codifying the engine capacity without this element the modification will have no effect in power

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2020-04-27, 22:16

poland

Mikołaj

Bulb 12V 35/35W BA20d

WSK M06 B3 "Hunchback" 1975, bulb like original from those years! :-) They shine well and replacement hassle-free.

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2020-06-22, 12:19

poland

Jarosław

420H 4T 139FMB transmission sprocket protector

The safety device does its job . Fits perfectly to the sprocket . I recommend !!! (Benzer Texsas 50)

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2019-01-08, 14:09

poland

Monika

Timing chain guide roller 4T 139FMB

Timing chain guide roller 4t 139 fmb very good quality recommend to everyone fits without any problem

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2019-05-20, 10:41

poland

Michał

Rocker arms set 4T 139FMB 154FMI

Fits a Romet ogar 125 motorcycle and fits 1:1 in the original. After inserting the levers my romet has a lot of power

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2025-07-07, 06:17

poland

Milan

Stator magneto 2 coils 4T 139FMB

Hello I would like to rate your page gmoto very highly and by that it is really great always when we something goes off on my quad 125ccm so I always turn to your page you are a bargain quality at super prices. I have already ordered a lot of parts it is very good that it always takes up to 3 working days to ship I have already ordered the drift. Starter relay Starter Spark plugs Starting voltage coil Gasoline filters Brake pads Oil to change and a few other things there's a lot of stuff Since then, it starts beautifully in 2-3 seconds thanks to your offers of what you buy Great site gmoto keep it up. I like úvas buy That discount from you would be nice for us. I still want to odvás to buy ALU wheels. Elektroni thank you for your understanding. Have a nice day

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2025-03-31, 15:37

poland

Tajaddin

Cylinder 50cc 139FMB 4T

The 50 cm³ cylinder for the 139FMB 4-stroke engine is an excellent choice for anyone looking for a reliable and durable replacement or upgrade for their engine. The workmanship is precise and the fit is perfect - installation went smoothly. After installation, the engine runs perfectly again, with smooth running and good performance. The cooling fins ensure efficient heat dissipation, which increases durability. A particularly positive feature is the high-quality material, which promises a long service life. All in all, a top product with a great price-performance ratio! A clear purchase recommendation for anyone who wants to get their 139FMB engine back in top form. ⭐⭐⭐⭐⭐

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2021-07-07, 03:00

poland

JanD

Carburetor ebonite washer with O-ring GY6 4T

Moped - Barton Fighter Eco 2020 The store's merchandise filter specified as if this pad would fit my machine. It does not fit!!! The main hole is 3.5 mm too small, and worse, the spacing of the screws is also strongly too small. I had an emergency situation and sanded the holes to my needs provisionally. But I am disappointed. For 139FMB engines, GMoto does not carry ebonite washers, despite the fact that these are the most common moped engines in Poland. And I see in the previous comments that this is nothing new.

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2025-04-20, 11:14

poland

Adrian Rene

Cylinder 50cc 139FMB 4T

Product arrived quickly and in full with fast processing and no complications. The price is fair and also very good value for the good quality. Shipping costs are also not as high as with other suppliers. As stated, the parts fit perfectly for my Romet Router WS 50 with four-stroke. I have installed everything new and everything is running great, just as I had hoped. I always order spare parts for my moped here and have never been disappointed.

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2019-07-08, 10:14

poland

Paweł

Rear sprocket rubber

Hello, I have a tuned 50/175 cc motorcycle that has a gear on this rubber. This rubber for the rear sprocket drove me 8 thousand kilometers on the engine 50 and 110 cc. Without problems therefore I recommend. I write a note for all DIY enthusiasts like me that if you give a large and powerful engine to such a small motorcycle, the rubber will need to be replaced every 1-2 months. Rubber is hard and good, but up to 11 horses maximum At 18 horses the rubber can not cope I rate 5

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2022-02-28, 20:47

poland

Przemysław

Oil O-rings cylinder - head 4T 139FMB 154FMI

Hi, I have an atypical moped sachs madass with 139fmb engine ordered a set of cylinder + head 72 4T 139FMB the order itself with shipment went very smoothly, cylinder ok unfortunately the head was no longer 100% as it should be, mainly it's about the finish sharp edges with numerous flecks after treatment, in addition the casting probably from beer cans as for me the head itself is not worth anything better to put money and buy something better quality

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Gmoto's reply If the product does not meet your expectations, you can easily return it. To do so, fill out the form available at https://gmoto.com/returns.
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2018-08-29, 08:52

poland

Jakub

Rear sprocket rubber

Gb Street 72 When I was replacing the drivetrain on my moto when removing the rear wheel literally spilled out this rubber taker , the pieces were so many that I was not able to pick them up and at least put them together . The part I ordered here fit perfectly and was made of better quality materials than the original . In general, I ordered here a lot of parts and can hand on heart recommend this store . Greetings

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2018-04-16, 07:02

poland

Damian

139FMB 50cc engine gasket set

barton rangger classic poj.50ccm vintage 2017 fitting gaskets very well made they fit very well and even perfectly made of good material they do not break like others they hold elegantly there was no problem with fitting with you products that I order always fit there was no part that did not fit as from others that I bought were fit to be returned

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2017-07-28, 16:56

poland

Michał

Intake and exhaust valve 70cc 4T

GB Motors Street 72ccm The product fit my head perfectly, you can say that it was so good that it fitted by itself :D Namely, it does not leak, everything plays as it should, after firing the motorcycle the old power returned and the pressure did not escape through the valves. I recommend the product as much as possible as well as the store, of course. He buys here all the parts he needs, because all are always here :)

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2021-06-26, 18:09

poland

Paweł

Intake and exhaust valve 70cc 4T

Barton Fighter BTS 50. parts of very good quality. Delivery within two days. Quick installation and the motorcycle rides like new. I honestly highly recommend ordering parts from this store. I have personally ordered different things several times already and each time I was satisfied. And whenever I need anything I will only order here. Proven and worth the purchase. Regards.

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2025-05-02, 19:06

poland

Tomáš

Carburetor repair kit 4T 139FMB delux

Carburettor kit 139FMB DELUX IT'S GOOD, IT FIXED MY CARBURETOR EASY TO INSTALL AND WORKS BEAUTIFULLY NO PROBLEMS WITH IT WERE NOT RECOMMEND THIS PRODUCT BETTER THAN BUYING A NEW CARBURETOR LONG LASTING AND AS I SAID EASY TO INSTALL JUST A TOP PRODUCT, I HAVE NOTHING TO COMPLAIN ABOUT I RECOMMEND!!!!!! AND FOR A BOMB PRICE THE BEST PRODUCT.?? AND IT ALSO GOES ON A JAWA BETKA 50Q 4T

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2018-02-05, 07:30

poland

lidia

Clutch basket with pressure plate set

Hello when it comes to the product recently purchased that is the clutch basket with pressure is my husband is incredibly satisfied with this product.Product at a low price with good material .Your store in this regard is the best product mega super durable as described.I recommend this store to everyone.And more than once I will take advantage of buying from your store.

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2018-02-06, 22:29

poland

Emil

Carburetor repair kit 4T 139FMB delux

Hello, I have a repair kit for the gas tank everything fits as it should yesterday and the engine is running as it should, thanks to your store and online site I order what I need and in 1 or 2 days I have my product every time the parts fit and I am satisfied and will probably buy more products from gmoto

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2017-04-14, 09:26

poland

Dominik

420H 4T 139FMB transmission sprocket protector

I own a cross with a 152fmh Loncin 110 engine I needed to protect the sprocket this protection fits perfectly it is well made, the holes are the right distance and the right diameter. The milling inside is well fitted so there is no play. The protection is thick which stiffens the mount. I recommend because the product is of good quality.

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2021-04-14, 08:29

poland

Bartosz

Camshaft 4T 139FMB

I purchased the shaft for my Zipp Pro 50. For a long time in my motorcycle in 3rd gear it was very jerky. I decided that it might be to replace the cam shaft. And so I did I ordered it from gmoto.pl installing the gears go very smoothly without any complaints. To my eye the shaft is made of solid material. I recommend this product !

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2019-06-17, 15:17

poland

Anna

Ignition module 4T 139FMB Ogar 900

So far ok. It's working. I'm not complaining. Because how can you complain about a module for 10 zl???. And seriously, I felt a noticeable difference in the power of my machine :-). Unfortunately, I do not have a working tachometer, but I have so about 10 km. more speed achieved and much quieter motorcycle :-) Greetings to the nice sellers :-)

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2025-05-21, 17:19

poland

Timi

Starter Relay GY6 4T

The picture shows an old and original product that broke, I ordered a solenoid from here for a really cheap price (I was surprised myself), it is pretty much the same as the original one, works and flowers well. Thank you very much. And to all good future driving until summer 2025. And long miles with gmoto products, heh

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2018-05-28, 00:16

poland

Rafał

Bulb 12V 35/35W BA20d

Scooter 2017 Toros El Rio Fit 99,coma 8% The most important thing is that everything works.I AM satisfied with this store more than on allegro because here everything is described in detail before buying to which I fit all models listed is solid and clear .This store I like the MOST .

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