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Motorcycle engine - parts - Page 73

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Found: 47369
4T 139FMB engine bolts set - 73837
4T 139FMB cylinder head bolts set - 73835
Clutch Adjustment Bolt 4T 139FMB - 73830
Clutch engagement kit screw - 73820 Clutch engagement kit screw - 73820
Starter chain guide set 139FMB 4T - 73817 Starter chain guide set 139FMB 4T - 73817
50cc engine complete - 73812 50cc engine complete - 73812

€417.01

delivery 0 €

50cc engine complete - 73812

Left engine cover, magneto, 2 coils - 73803 Left engine cover, magneto, 2 coils - 73803
Oil pump 4T 139FMB - 73807 Oil pump 4T 139FMB - 73807

€5.16

Oil pump 4T 139FMB - 73807

stars    (7)
154FMI Shaft Seal Cover - 73806 154FMI Shaft Seal Cover - 73806
Piston rings 72cc 4T 139FMB - 73800
Piston rings 60cc 4T - 73799
Piston rings 50cc 4T FMB - 73798
Cylinder pin nut and washer 4 pcs - 73797 Cylinder pin nut and washer 4 pcs - 73797
Exhaust stud nut 4T 139FMB 2 pcs. - 73795
Complete cylinder 72cc 139FMB 4T - 73784 Complete cylinder 72cc 139FMB 4T - 73784
GY6 80cc Cylinder and Head Gasket - 73774 GY6 80cc Cylinder and Head Gasket - 73774
Cylinder and head gasket 65cc - 73773
Cylinder and head gasket 50cc - 73772
GY6 4T 50cc Camshaft - 73771 GY6 4T 50cc Camshaft - 73771
Valve seal 1 pc. - 73768 Valve seal 1 pc. - 73768

€1.12

Valve seal 1 pc. - 73768

stars    (18)
GY6 4T Rear Transmission Bolts - 73764 GY6 4T Rear Transmission Bolts - 73764
Timing chain guide mounting bolt - 73763 Timing chain guide mounting bolt - 73763
Pulse generator mounting screws - 73761
4T starter lever bolt - 73760
GY6 4T engine bolts - 73759

Browse Motorcycle engine - parts - Page 73 by manufacturer

Products reviews

2020-09-07, 08:47

poland

Krystian

Starter chain guide set 139FMB 4T

Hello I own a junak 901 with a capacity of 50/70cmm from new purchased in 2011 to date Junak has traveled nearly 17 thousand km What I really like about the moped is the simplicity of the whole motorcycle, there is nothing complicated in the repair process, simple design, availability of parts is huge and easy to obtain. This is the second repair of the engine since new due to the fact that I ride a lot, parts wear out, now I have overhauled the engine again and the motor fires up from a shot, the larger gear ratio gears allowed to run longer in gear and achieve better results speed in km ends as soon as the pointer passes 80 I like to test various products with them especially carburetors and filters to get better results in combustion and on power of course it is possible but several carburetors of different manufacturers of fuel nozzles you need to have to get such an effect . Parts from gmoto I buy because it is a proven seller of parts and really parts are of very good quality than on other sites only now what I bought starter chain sliders significantly differ from the original I would say more that the quality and material are other weaker but for everything there is a way site I recommend to all lovers of unicycles

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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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2022-02-21, 08:42

poland

Konrad

Drive belt cover length 43cm GY6 4T

Kingway Zibo 50 vintage 2003 I bought the cover from gmoto I am very satisfied the cover meets all the conditions it is really durable I highly recommend as well as other products from this store, because they are really persistent greetings!

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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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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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2019-03-26, 17:22

poland

Monika

Cylinder pin nut and washer 4 pcs

Cylinder pin nuts and washers fmb139 super quality with attention to detail made of high quality materials I recommend to everyone

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2020-09-07, 08:50

poland

Krystian

Timing chain guide roller bolt 4T 139FMB 154FMI

The screw does not differ from the original and was sold with the washer included where else you have to buy the washer separately I recommend the product

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2019-03-26, 17:03

poland

Monika

Head 90cc 4T set

Head 90cm very good head for 90cm cylinder well made with attention to detail recommend to all

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2020-09-07, 08:58

poland

Krystian

Cylinder pin nut and washer 4 pcs

Installation went without a problem threads not damaged the shipment itself also not damaged I recommend the product

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2016-03-08, 22:01

poland

Łukasz

Starter chain guide set 139FMB 4T

i have a 2007 kingway 50 chopper I bought new starter chain sliders because the old ones were already very worn and while driving I could hear knocking after installing the new sliders the problem disappeared sliders fit perfectly in their place and not as I bought in another store nothing fit here, however, everything fit perfectly I am very pleased with them and I recommend them to anyone who wants to buy them.

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2025-03-19, 10:01

poland

hervé

Head 90cc 4T set

very good quality cylinder head, adds power when the engine revs up, which can be felt on acceleration and top speed, gaining at least 10km/h if you add an A9 camshaft or more, you'll gain even more, that's for sure! Perfectly packaged .thank you Gmoto .

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2023-08-07, 16:19

poland

Ireneusz

Complete cylinder 72cc 139FMB 4T

Very good build quality. The head with larger valves to this plus the replacement of the main nozzle in the carburetor gives incredible power. And if you replace the gearbox with more teeth in the engine it flies like a storm. 2 times faster and much more powerful. I sincerely recommend. I have taken a lot from this store and everything great.

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2018-12-02, 14:38

poland

Gracjan

Gear shifter ratchet bolt 4T 139FMB

Barton FR 50 2014. The pawl really does its job very well, the gears do not fall out or jump. the product is made very aesthetically pleasing and is very easy to install. I am very satisfied with this purchase, I recommend to other customers greetings warmly.

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2016-06-04, 17:52

poland

Przemysław

Valve seal 1 pc.

I purchased valve seals for a 150cc quad. I also bought a starter and a set of gaskets also for this quad. With the quality of the parts I bought so far I am satisfied. As for the seller also no reservations. Fast shipping and hassle-free. I recommend.

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2025-06-06, 15:34

poland

Tadeáš

Complete cylinder 72cc 139FMB 4T

the cylinder itself is great and the piston all the seals and piston rings . it's supposed to be a plug and go cylinder . NOT I have a jawu betka/kentoya twinshot and need to buy a new head because the original camshaft is not enough and need to adjust the valve .

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2019-06-07, 08:31

poland

Łukasz

Complete cylinder 72cc 139FMB 4T

The cylinder fits perfectly to the engine 139FMB, the moped after such tuning laughs beyond recognition, I wanted to emphasize that I did not replace the gasser, it is the original from the fifty, only the nozzle replaced with a larger + head and everything runs perfectly.

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2020-01-22, 19:14

poland

Bartosz

Head 90cc 4T set

Router Sport 4t. I redid the engine but had a head that was too small, I ordered this product and it is very good, workmanship really high, no leftovers from the processes, the camshaft with the bridge fits elegantly. I recommend

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2024-10-03, 03:39

poland

Cezary

4T 139FMB engine bolts set

This kit is very useful for overhauling FMB139 and related engines . Finally I have new screws, and do not have to look for anything . All that were scratched or machined I replaced with new ones . Now it is completely different . :D

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2023-12-31, 11:05

poland

Robert

Cylinder pin nut and washer 4 pcs

As the only product I have a negative opinion because the quality of the thread in the nuts purchased was tragic both in terms of its appearance and the internal diameter on which the thread was made . I did not install them on the motorcycle .

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Gmoto's reply If you are not satisfied with the quality of workmanship of the purchased item, simply submit a complaint request on the store's website.
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Reliable opinion

2018-06-04, 20:32

poland

Marcin

Complete cylinder 72cc 139FMB 4T

Junak 901 2014. Cylinder of good quality, fits perfectly to the engine 139FMB, the aesthetics of workmanship I can rate very good. All gaskets fit, there are no free spaces between the cylinder and the crankcase. I recommend

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2017-05-29, 21:56

poland

Mateusz

GY6 80cc Cylinder and Head Gasket

Hello I have a moped company kingway tiggero poj.50ccm with small modifications to90ccm. I ordered from you a gasket and head which is in working order and 100% perfect,Goods ordered from you are worthy of recommendation

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2017-08-26, 09:27

poland

Tomasz

Rings set 50cc GY6 4T

Scooter Kingway Mosquito capacity 50cc ordered rings very nicely entered the piston. There was no problem with the assembly. After assembling the scooter fired up from a shot, which did not do before. The smile of a child priceless :)

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2018-07-10, 10:33

poland

Michał

Drive belt cover length 43cm GY6 4T

Scooter capacity 50/80 I recommend the cover is cheap and does the job and looks nice,the package arrives very well protected,I order a lot on this site and 100% on another I will not order only here :)

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2018-07-10, 10:33

poland

Michał

Drive belt cover length 43cm GY6 4T

Scooter capacity 50/80 I recommend the cover is cheap and does the job and looks nice,the package arrives very well protected,I order a lot on this site and 100% on another I will not order only here :)

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2025-05-06, 05:00

poland

Ulrich

Oil pump 4T 139FMB

The quality makes a very good impression. The look and fit are the same as the original part I replaced with it. Shipping was very fast, everything I ordered was securely packed.

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2018-09-16, 12:03

poland

Arkadiusz

Cylinder pin nut and washer 4 pcs

Junak 901F 50cm3 capacityride it sensationally,and the products purchased from you emphasize the specific haracteristics of the motorcycle and increase its visual appearance from elegant to mega effectively nice

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2023-06-07, 23:01

poland

Konrad

Cylinder and head gasket 50cc

I highly recommend. Purchased gaskets fit the engine perfectly and are made of very high quality materials by which nothing differs from the original. The installation went without the slightest problem.

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2016-04-29, 08:47

poland

Mirosław

Rings set 80 cm3

Chinese. A small conversion from 50 cc to 80 unfortunately ring crack when putting on, but your product super made of good plastic, that is, and power increased. I highly recommend everything. Very fast shipping ;)

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2021-04-14, 08:21

poland

Bartosz

4T 139FMB engine bolts set

Screws I bought for Zipp Pro 50/110 with 139 fmb engine after unpacking I started to screw the engine with them. The screws screw in easily there was not a single one missing from the set I even got one with a surplus. I recommend.

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2021-04-14, 08:21

poland

Bartosz

4T 139FMB engine bolts set

Screws I bought for Zipp Pro 50/110 with 139 fmb engine after unpacking I started to screw the engine with them. The screws screw in easily there was not a single one missing from the set I even got one with a surplus. I recommend.

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2024-12-04, 14:19

poland

Dupont

Clutch basket nut and washer 4T 139FMB set

Perfect very good parts the bed and complete for the perfecto clutch nayaux it looks good size fortunately there are small replacement parts so it's good

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2017-09-24, 12:03

poland

Mateusz

Rings set 50cc GY6 4T

Not the first and not the last purchase from this store. Great contact. Express shipping. Goods always as described. And Everything in one place. I really recommend this store. Best regards to the Gmoto team

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2020-10-02, 08:06

poland

Piotr

Complete cylinder 72cc 139FMB 4T

Product as described. Solid components. Cast iron piston fits the cylinder perfectly. Affordable price for this product. At others I have seen the same set for twice as much. I recommend.

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2020-10-02, 08:06

poland

Piotr

Complete cylinder 72cc 139FMB 4T

Product as described. Solid components. Cast iron piston fits the cylinder perfectly. Affordable price for this product. At others I have seen the same set for twice as much. I recommend.

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2020-10-02, 08:06

poland

Piotr

Complete cylinder 72cc 139FMB 4T

Product as described. Solid components. Cast iron piston fits the cylinder perfectly. Affordable price for this product. At others I have seen the same set for twice as much. I recommend.

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2020-10-02, 08:06

poland

Piotr

Complete cylinder 72cc 139FMB 4T

Product as described. Solid components. Cast iron piston fits the cylinder perfectly. Affordable price for this product. At others I have seen the same set for twice as much. I recommend.

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2020-10-02, 08:06

poland

Piotr

Complete cylinder 72cc 139FMB 4T

Product as described. Solid components. Cast iron piston fits the cylinder perfectly. Affordable price for this product. At others I have seen the same set for twice as much. I recommend.

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2020-10-02, 08:06

poland

Piotr

Complete cylinder 72cc 139FMB 4T

Product as described. Solid components. Cast iron piston fits the cylinder perfectly. Affordable price for this product. At others I have seen the same set for twice as much. I recommend.

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2020-10-02, 08:06

poland

Piotr

Complete cylinder 72cc 139FMB 4T

Product as described. Solid components. Cast iron piston fits the cylinder perfectly. Affordable price for this product. At others I have seen the same set for twice as much. I recommend.

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2020-04-05, 22:52

poland

Patryk

Drive belt cover length 43cm GY6 4T

Not scratched, great quality, fits like a glove so far all the products I have ordered from this site are perfect and certainly when I will be ordering something from here I heartily recommend it

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