Naraku V.2 90cc cylinder kit for GY6, Kymco 50 2V
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cylinder kit Naraku V.2 90cc incl. cylinder head for GY6, Kymco 50 2V

Item No:
NK100.52
189,08 EUR
prices incl. 0% sales tax, free shipping in GER
gross weight: 1,96 kg
With the latest V.2 Cylinder kit series from NARAKU, we can offer a more advanced product. The bore has been taken out to 52.4mm. The external diameter of the cylinder base has not been affected by the increase in displacement. This means alterations to the crank cases are generally not required. As a 4 stroke cylinder is effectively just a hole, the emphasis on technological development was placed on the piston and compression. The piston has 2 additional CNC-machined oil grooves in the piston skirt, which collects engine oil to lubricate the cylinder bore and improve characteristics in extreme circumstances. The molybdenum coating aids the crucial running-in period. 2 oil recesses and a groove at each bearing point ensure the gudgeon pin is adequately lubricated. The compression ratio and power delivery set this cylinder apart. The kit contains a cylinder head with larger valves and optimised inlet and outlet ports. For technical reasons, a bore size of 50mm or larger requires a larger head for on-going use. This kit is currently one of the biggest conversions on the market. The kit can use the original carburettor, but we recommend changing the main jet.

Please note: For Sym scooters this kit is only suitable for the GY6 139QMB engine version and not the XS1P139QMB, AV05W or AW05W engine or the Sym Symply 2 models
Item No:
NK100.52
EAN/UPC:
4250362410412
Shipping:
Out Of Stock
Manufacturer:
Naraku
gross weight:
1,96 kg
Mr. Pabst
 11/20/2022
Mr. Seidel
 07/25/2021
Mr. Wienold
 04/29/2019
Mr. Arbinger
 07/25/2017
Mr. Pirzl
 07/22/2014
Super Produkt
Ms. Petrich
 08/04/2013
das ist mein 2. der erste hat gut 10000km gehalten. der zug ist nicht zu toppen. verarbeitung sehr gut. aber der preis...
Mr. Köller
 09/01/2011
Mr. Köller
 02/10/2011
Mr. Fabry
 12/28/2009
Mr. Meier
 08/15/2009
Mr. Scholzen
 06/28/2009
Mr. Wesemann
 04/09/2009
Mr. Kulpok
 11/20/2008

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spare parts & accessories for this item:
spark plug NGK CR7HSA
 
       IN STOCK  
gross weight: 0,03 kg
CR7HSA
3,36 EUR*
 
 
cylinder head valves Naraku V.2
 
       IN STOCK  
gross weight: 0,08 kg
NK100.55
42,10 EUR*
 
 
piston set Naraku 52.4mm CNC milled piston skirt grooves for 139QMB/QMA
 
       IN STOCK  
gross weight: 0,13 kg
NK100.64
32,35 EUR*
 
 
top end gasket set NARAKU [51/52mm]
 
       IN STOCK  
gross weight: 0,05 kg
NK100.58
10,08 EUR*
 
 
piston pin circlips Naraku 13mm
 
       IN STOCK  
gross weight: 0,01 kg
NK100.18
0,84 EUR*
 
 
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