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Motorcycle parts
Junak 901 RS 50 4T - Page 2

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Found: 277
Turn signal flasher 12V 2 pin - 128112 Turn signal flasher 12V 2 pin - 128112
Foot shift lever for 4T moped - 126397 Foot shift lever for 4T moped - 126397
54.00 mm piston 154FMI engine - 123438 54.00 mm piston 154FMI engine - 123438
Valve set 139FMB 50cm3 - 121312 Valve set 139FMB 50cm3 - 121312
147FMB 70cc engine gasket set - 118267 147FMB 70cc engine gasket set - 118267
Aluminum oil cooler 139FMB - 110713 Aluminum oil cooler 139FMB - 110713
Junak brake shoes new - 110044 Junak brake shoes new - 110044
Junak starter relay new - 110025 Junak starter relay new - 110025
Rear wheel axle Junak 901 902 - 110014 Rear wheel axle Junak 901 902 - 110014
Clutch lever + handle - 109952 Clutch lever + handle - 109952
Junak fuel tap new - 109953 Junak fuel tap new - 109953
Junak 901 902 clutch lever - 109939 Junak 901 902 clutch lever - 109939
Junak front brake lever new - 109938 Junak front brake lever new - 109938
Junak 901 ignition coil - 109934
Head gaskets + O-rings 72cm3 - 107586
Timing belt repair kit 139FMB - 90931
Air filter housing + air filter - 90994 Air filter housing + air filter - 90994
Oil Cooler 139FMB 147FMB ATV - 85437 Oil Cooler 139FMB 147FMB ATV - 85437
Gear shift sensor complete 154FMI - 86900 Gear shift sensor complete 154FMI - 86900
Complete engine 110 cc - 83743 Complete engine 110 cc - 83743

€379.64

delivery 0 €

Complete engine 110 cc - 83743

stars    (4)
Complete cylinder head 72cc Taiwan - 81620 Complete cylinder head 72cc Taiwan - 81620
Complete piston 39mm 50cc 4T - 81326
Piston 47mm 70cm3 4T 139FMB set - 81323
Complete piston 43mm 60cc 4T - 81325
Bowl with thuja and clutch spring - 80984 Bowl with thuja and clutch spring - 80984
Output gear protection 428 - 80985
110cc engine complete conversion from 50cc to 110cc - 80642 110cc engine complete conversion from 50cc to 110cc - 80642
4T 139FMB cylinder head cover - 77954 4T 139FMB cylinder head cover - 77954
Right clutch cover - 77211 Right clutch cover - 77211

€18.70

Right clutch cover - 77211

stars    (1)
Unlocked 4T 139FMB module - 76968 Unlocked 4T 139FMB module - 76968
Carburetor with tap - 76860 Carburetor with tap - 76860

€14.23

Carburetor with tap - 76860

stars    (7)

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Products reviews

2017-08-19, 11:15

poland

Kazimierz

110cc engine complete conversion from 50cc to 110cc

I put a 110 engine into a 2013 Barton Fighter 50 eco. The engine started and runs well.Not matching are :front sprocket(the 14-tooth one seems to have a different pitch because the chain jumps) , gear shift lever,foot starter and sprocket cover ( you have to cut it to fit ) . You also need to replace the air filter in addition. Another thing you need to get used to is the gear layout - neutral at the highest and the other gears down ( N-1-2-3-4) .You also need to put an additional line to the suction because in the previous carburetor there was a lever control directly on the carburetor.And besides, there is power :) . Greetings.

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2018-07-27, 08:35

poland

lidia

110cc engine complete conversion from 50cc to 110cc

I have a kinroad mini chopper the engine was falling apart and I bought a new engine at Gmoto where it was the best deal.I disassembled the old one and put the new one on.Everything fit perfectly,in my opinion any one could do the same as I did without any help.Gmoto is the best online store today I order and tomorrow it is already at home.Bomb.

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2018-10-12, 07:13

poland

Krystian

Unlocked 4T 139FMB module

Junak 901 year 2017 capacity 49 CC I bought new. It had a lock on the revs and that indeed when it came to me this module quietly into the frame fit. Improved my motorcycle performance screws into higher revs. The quality of workmanship is very good module is larger than blocked but there is no problem with installation in Junak 901

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2019-02-08, 06:40

poland

Dawid

110cc engine complete conversion from 50cc to 110cc

So I ordered a 110cc engine, 4-speed motor works well in terms of power and you can also ride it nicely, the engine works beautifully at speed, the engine fits perfectly to zipp xrace. If you think to enlarge the engine (replacement )this is the engine I recommend greetings .

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2018-07-03, 15:19

poland

Piotr

Rear sprocket carrier rubber Junak new

Hello I own a new 2017 junak 905. I ordered the rear sprocket carrier rubber ,unfortunately not for this model of junak because in the description of this model was not there but ftrafiłem perfectly. Replacement was very easy. The store can add the model 905 because I fit. And now the photo on the left worn on the right new. Greetings.

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2020-11-09, 07:58

poland

Piotr

Front sprocket 428 12 teeth

I have a motorcycle Junak 905.Its fault was that it does not accelerate in 4th gear, so I decided to buy a 12 tooth sprocket, because I have 13 as standard, so I ordered it.Once it arrived I immediately went to install it simply fit as standard. Now my junak accelerates in 4th gear.

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2024-11-08, 06:27

poland

jerome

110cc engine complete conversion from 50cc to 110cc

Motor very well packed on receipt, complete with accessories, easy to start up and immediately operational. Tested unloaded before fitting to motorcycle, it flips like a charm! I recommend both the product and the site!

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2019-06-14, 10:22

poland

Mateusz

Left side engine crankcase 139FMB ball bearings

I ordered a crankcase for a Junak 902 - although it is listed as "fits to" on the item page, unfortunately it is not a perfect fit. Unlike the original, it does not have an input for the shift sensor cable.

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Gmoto's reply If the products do not fit your motorcycle, you can easily return them by filling out the claim form at https://gmoto.com/returns. We will cover the return cost.
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2022-06-01, 10:05

poland

Lukasz

110cc engine complete conversion from 50cc to 110cc

Motor super, quality of workmanship also very good. Fits like a glove in place of the old motor. Speed of shipping surprising. Already on the second day the package was with me. I recommend this store.

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2017-09-09, 08:27

poland

Jan

Clutch lever + handle

Goods brand new, completely fulfilled its purpose. It looks like original quality. The price in normal, I do not feel that I overpaid. Everything works as before. 5/5.

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2022-01-10, 22:16

poland

Kamil

Clutch lever + handle

I bought as a replacement for TRX400ex I will say that it fits perfectly, as I have a small hand it still does not cause me any problem to press the lever.7

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2018-02-07, 15:53

poland

Szymon

Valve set 139FMB 50cm3

Romet ogar 202 valves fit perfect fit after reaching them nothing leaks burns on touch 3 sec starter and burns bdb recommend in 100% :)

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2021-01-03, 14:19

poland

Filip

Unlocked 4T 139FMB module

The module works very well with Loncin 125 and works flawlessly immediately feel more power. Very fast installation. Recommended.

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2024-09-19, 18:52

poland

oni bikers

110cc engine complete conversion from 50cc to 110cc

incredible motor i recommend it runs very well my bike starts at a quarter turn and with the akra line it has become a monster

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2024-08-09, 08:08

poland

Eryk

Air filter housing + air filter

The product fits my vehicle model perfectly, as stated on the website. It is very solidly made, I have no reservations!

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2024-12-11, 12:42

poland

Durand

110cc engine complete conversion from 50cc to 110cc

Perfect engine adapted without modification, superb finish and works very well, fast delivery and well protected.

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2019-01-08, 08:04

poland

Monika

Front sprocket 428 12 teeth

Front sprocket 428 12 teeth very well made with attention to detail fits without any problem I recommend to everyone

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2025-08-27, 14:04

poland

Parent

110cc engine complete conversion from 50cc to 110cc

Very good engine, frankly it works perfectly. I'll be recommending one next month for my second bike.

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2024-07-30, 08:42

poland

Grzegorz

Timing belt repair kit 139FMB

No possibility of replacing the timing chain for the 139FMB engine which turned out to be too long . Not recommended.

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Gmoto's reply If the products do not fit your motorcycle, you can easily return them by filling out the claim form on the website.
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2025-07-15, 09:24

poland

Patrick

110cc engine complete conversion from 50cc to 110cc

⭐️⭐️⭐️⭐️⭐️ Top motor - absolutely recommendable! This is now the 3rd engine I have installed - and as always I am completely satisfied. The price is more than fair for the quality on offer. The workmanship, performance and durability are impressive across the board. Shipping was super fast, everything was well packaged and arrived without any problems. I can recommend this engine to anyone who wants to make their moped faster and more reliable. A clear recommendation to buy!

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2020-08-19, 22:07

poland

Paweł

Unlocked 4T 139FMB module

Hello, I purchased an unlocked module for Barton fighter 50 and honestly I recommend everyone to buy this module on this site. After installation which is literally simple, the motorcycle is unrecognizable. It picks up better, it is much so called ripper and the performance is much better. I measured the maximum speed after the replacement and on the straight 95km/h passed, and I think it would have been able to do a little more, but unfortunately the straight ended. I sincerely recommend this purchase.

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2020-08-08, 07:36

poland

Patryk

Oil Cooler 139FMB 147FMB ATV

The radiator performs very well and you can feel the difference on hot days when engine cooling is a little worse. The kit fit perfectly and there was no problem with installation. In my case, you had to tighten those nuts at the oil outflow and inflow because they were poorly tightened. Likewise, you had to buy tourniquets because the original ones did not lapped very tightly u could see the oil leak. These are penny issues and they fixed the problem.

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2025-08-06, 09:03

poland

Adam

Piston 47mm 70cm3 4T 139FMB set

This is the first time I've ordered a piston from this site, and I have to say that I'm clearly not disappointed. The piston is in very good condition, there's no trace of scratches or anything else, plus everything is very well packaged, nothing to say on that score, and the rings fit superbly, they're not damaged or broken at all, nothing at all. I'm going to put this on my Masai scrambler 50cc with a 70cc cylinder kit.

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2019-10-14, 12:53

poland

Kacper

Unlocked 4T 139FMB module

I have a moped brand Router ws 50 I highly recommend the purchase of this module, my moped began to accelerate much faster and the top speed also increased, on the GPS without the module v-max was about 65kmh and with the module 80. The module is made of good plastic, it is larger than the original but still fits very well, I have it for about 2 weeks now and I really recommend the purchase of this product.

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2019-05-09, 17:44

poland

Rafał

Unlocked 4T 139FMB module

My motorcycle is a Chopper kingway Superbyke XT 50Q-00 I bought and buy parts on Gmoto.pl I bought an unlocked module which unlocked my motorcycle which gave more power and better acceleration finally my engine is working as it should,I am satisfied with the quality of the product its delivery and replacement of parts the company Gmoto.pl in aroused great trust in me thank you and RECOMMEND you

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2023-01-30, 23:18

poland

Wiktor

ATV 110 King Łoś magneto stator 2 coils

Ogar 900, the whole fits perfectly. Used in place of the burned out only the charging coil of the CDI module, after a slight modification of the winding connections and changing the connectors. By the way - in this stator with one coil providing battery charging, it is necessary to periodically recharge the battery!!! After the replacement so far the scooter starts without any problems.

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2017-06-16, 10:18

poland

Michał

Unlocked 4T 139FMB module

The module is a little larger than the standard one, but it fits and can be easily mounted. Electronics flooded with gel, which is a little sticky and will probably collect all sorts of flecks, but you can not see it, so all in all not important ☺️. After installation, the motorcycle gained a little power, collects better at the lights, which is what I wanted. For the price I recommend. Zumico GR 200

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2018-08-24, 11:29

poland

Jakub

Unlocked 4T 139FMB module

The product is solidly made, it is a little larger than the original module, however, into the frame of Zippa Pro 50 fits. The bike got a little kick after the change, but there is not a huge difference. The only disadvantage for me is the material with which the module is flooded, it is sticky, so after some time it will collect debris, dust, etc.

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2025-05-20, 19:13

poland

Royer

110cc engine complete conversion from 50cc to 110cc

Very good, very good engine, I am happy to have ordered on this site, I recommend it, good direction of purchases and payment easy and simple delivery on time, good model.,,...,................................I recommend......................................................,..........................,

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2020-08-17, 21:03

poland

Tomasz

Unlocked 4T 139FMB module

Fits perfectly into my Kinroad Chopper Xt50q. V max unchanged (I close the alarm clock), but much more powerful (it goes over hills it had trouble with before without problems). Replacement took me about 15 minutes, and only because of the strong tightening of one of the screws. In my motorcycle this module is located under the main seat.

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2019-12-25, 23:49

poland

Kamil

110cc engine complete conversion from 50cc to 110cc

I ordered an engine for a 110 capacity motorcycle I got what I saw on the website the company gmoto concrete reliable conscientious I have a couple of motorcycles and only here I do my shopping I recommend if someone is wondering there is nothing to buy boldly goods of 1 class without sciema what is in the description you buy and you have really recommended

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2018-03-18, 11:21

poland

Mikołaj

Unlocked 4T 139FMB module

It came what I wanted, I thought I would get a piece of Chinese plastic that I would put in my motorcycle, but here I was pleasantly surprised. Exquisite workmanship, I put it in right away without the slightest problems which is a testament to the excellent fit. If anyone is thinking about buying it, I recommend it WORTH IT!

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2024-09-20, 06:02

poland

David

Complete piston 39mm 50cc 4T

Good aluminum quality, piston rings are very easy to install and the piston only needs minimal break-in as it already fits very well. Disadvantage: Aluminum is not as durable as a steel piston, but the cylinder is not damaged as much in the event of piston jamming

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2025-05-13, 17:56

poland

Stéphane

Valve set 139FMB 50cm3

Hello, The valve clearance seems to be of good quality. Only the exhaust valve head is slightly smaller in diameter than the original one. See after running in if the contact surface is sufficient. Gmoto, a responsive team and fast delivery. I recommend Gmoto.

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2024-09-17, 09:21

poland

Brian

Complete engine 110 cc

Runs fine, pulls really well. However, I think it shakes a little when you get up to 8000 rpm, so I do not do that. I have geared the moped on the chain, so the rpm comes down. Coming down, but it can easily pull an even higher gearing if I want to go faster. Now driving approx. 85kmt

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2020-02-15, 09:37

poland

Wiktor

Unlocked 4T 139FMB module

I would like to share my opinion on the module I had the original module in my motorcycle but I purchased from gmoto website unlocked Module is made, with very good materials after inserting into the motorcycle this module immediately came out better on the revs.

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2019-01-26, 14:22

poland

Lipsky

Unlocked 4T 139FMB module

good thing, after replacing from factory to unlocked you can see a significant difference. Good quality workmanship comparing with the factory one can see a significant difference on the plus side . Plug stiff, fits perfectly into ym 50-8b. Zero problems with installation. I recommend.

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2020-05-06, 17:02

poland

Maciej

147FMB 70cc engine gasket set

The paper ones not very decent though would have sufficed,but unfortunately they were glued to the film so that I destroyed most of them trying to peel them off [I did it very gently].The only thing that came in handy for me was the head gasket,exhaust and orings.

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Gmoto's reply If you have come across a defective product, we encourage you to file a complaint at https://gmoto.com/returns. We will replace the product with a new one or refund your money.
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2021-08-09, 15:26

poland

Krzysztof

Junak 901 901 Sport 902 throttle cable

Unfortunately for Baton Volcano (2014) does not fit, as it is a few cm too short from the original. In addition, the attachment under the closure of the emergency button also does not fit. A little bit my mistake because I did not measure the original cable. Greetings

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Gmoto's reply If the products do not fit your motorcycle, you can easily return them by filling out the claim form at https://gmoto.com/returns. We will cover the return cost.
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2018-04-09, 10:43

poland

Kamil

Foot shift lever for 4T moped

Junak 901 50 cm^3 2013 year . The product is made according to the highest care and solid material, the course of installation of the gear shift lever itself did not even take 5 minutes. I am very satisfied and I know that you are worthy of recommendation.

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