139QMB Upgrade Kits

139QMB Kits. Nobody has as many Kits in stock as we do and to make it easy on how to upgrade your Chinese 4 stroke scooter we are presenting a short guide.

Most Chinese 50cc Scooters use the GY6 50cc 139QMB engine. We have several kits of different quality / brands you can choose from. You can find your local shop and a list of parts at http://www.mrp-speed.com

Most scooters bring a 39mm or 41mm stock cylinder.

50cc cylinder plus head stock several brands Zongshen, MRP, Naraku starts MSRP $70 

Upgrade This is everything your going to need to rebuild that tired and worn out engine with low compression. This kit includes the cylinder, piston, wrist pin, rings, circlips, head gasket, base gasket, and even a new exhaust gasket! Tank, Sunl, Roketa, Vento, TNG, VIP, Baja, Jonway, JMstar, Peace, Lance, NST, as well as others. GY6 139QMB.

UPGRADES!

63cc cylinder and piston only ( use the stock head ) MSRP $90 RP-NK100.24 most scooters do not need to be bored out just slide it in. These upgrades again are for 50cc 4-stroke QMB139 engines. This engine is used on virtually all 49cc/50cc 4-stroke Chinese and Taiwanese scooters, but check first before ordering that you have a 4stroke Chinese scooter.

Requires boring in most cases

70cc The TRUE 70cc Cylinder with Head MRP N-MP-09501A-B by MRP MSRP $170

100cc  51mm Cylinder Head for racing MSRP $100 RP-NK100.12

These require the engine to be bored out in almost all cases.

72cc Naraku Cylinder RP-NK100.47  MSRP $150

80cc  Head plus Cylinder by MRP the MSRP is $230

90cc RP-NK100.65 Cylinder only Naraku MSRP $150

Complete Race Kit

100cc 52.4mm It's a Naraku Kit - premium true 100cc RP-NK100.52 MSRP $350 Bigger valves and a smaller exhaust port performs better on any dyno chart than any other brand. That's right its better than NCY, HOCA, anything you can find out there put it to the test we dare you. The fastest you will go on a 139QMB scooter is with this kit.

GASKET SETS

We sell complete MRP 50cc Gasket sets,

Gaskets sets by SN

and Naraku replacement 50cc / 70cc 139QMB sets as well.

For a full list of upgrades visit http://www.mrp-speed.com

A fraction of the Private label Chinese 4T QMB139 GY6 scooters includes: Baja SC50, Tank, Baotian 50QT-9, Baotian, 50QT-11, Dotera 50QT-11, Jalon JL50QT-18, Sinski XSJ50QT-6, Jalon JL50QT-21, Falcon and JL50QT-15, JL50QT-16 , Pantera Freedom, Fusion and Retro, Verucci VC50TS-3M, Sunl SL50QT-16, SL50QT-16, SL50QT-18, SL50QT-2, SL50QT-3, Roketa Bahama, Maui, KYMCO Filly, KYMCO Nexxon 50 KYMCO People KYMCO Super 8 KYMCO Vivality KYMCO NEW DINK 50 KYMCO Yager KYMCO Yager GT MSK Ecobike 50 PEUGEOT V-CLick REX Capriolo 50 REX Flory, Sicily, Tank, Baotian 50QT-9, Baotian, 50QT-11, Dotera 50QT-11, Jalon JL50QT-18, Sinski XSJ50QT-6, Sinski XSJ50QT-B, VIP Future Champion, KYMCO 4 stroke units. Some common brands and names being imported are: Shanghai Shenke, EVO 50cc, Zongshen Metro 50cc, Baja Powersports (PEP BOYS made by Zongshen) Baja SC50, Strada RX 50 (4 stroke) Powersports Factory, Sinski XSJ50QT-B, Taishan Commuter, Baja motorsports SC-50 sun city, primo,  Taishan Sport Zhong Hu 50cc 4t This kit will fit most 4 stoke 50cc horizontal style (139QMB) Scooter, Moped, ATV 4-stroke air-cooled engines / motors that are being made and imported from Asia, China, Taiwan, Japan, Korea, etc. like kymco agility , baotian This kit will fit : BAOTIAN BT49QT-2 BAOTIAN BT49QT-7 BAOTIAN BT49QT-9 BAOTIAN BT50QT-9 BAOTIAN BT50QT-11 BAOTIAN Ecobike BENZHOU YY50QT BENZHOU City Star 50 BUFFALO Wind ERING Sprint 50 JIN LUN JL50QT KARCHER KM 50 Kreidler Flory 50, Kymco Agility 50 Kymco Agility MMC 50 Kymco Filly 50, Kymco Vitality, Strada RX 50, Jalon JL50QT-21, falcon and JL50QT-15, JL50QT-16,Strada RX 50, Jalon JL50QT-21 falcon, JL50QT-15, JL50QT-16, JL50QT-18, Pantera Freedom, Fusion and Retro, Verucci VC50TS-3M, Sunl SL50QT-16, SL50QT-16, SL50QT-18, SL50QT-2, SL50QT-3, Roketa Bahama, Maui, Sicily,50  REX RS 450, REX RS 500 REX Off Limit 45 RIEJU Paseo 50 RIEJU Toreo 50 Sachs 49er 50 Sachs, Bee SANILI TS50QT-4 QUINGQI QM50QT-6A XINLING ZHONG YU 50 QT-5 ZHONG YU 50 QT-7, ZHONG YU ZY 50QT ZHONGSHEN Wind 25/50 ZHONGSHEN ZS50QT-4 50, Baron 50, and many many many more! It seems its all they make in China these days.