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Motoforti ATV Scooter Engine Parts Cylinder Big Bore Kit with Gasket and Piston for Yamaha Jog Vino 50 70CC

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$70.49

$ 33 .99 $33.99

In Stock
  • Fitment: for for Yamaha JOG / for MinarelliI / for Yamaha Clone Motors; for Jonway for Jmstar for Roketa for Sunl for Yamaha.
  • Master Cylinder Size: 110x95x80mm / 4.33"x3.74"x3.15"(L*W*H), Cylinder Head Size: 100x90x35mm / 3.94"x3.54"x1.38"(L*W*H), Piston Size: 48x47mm / 1.89"x1.85"(H*D), Wrist Pin Size: 38x10mm / 1.50"x0.39"(H*D), Displacement: 70cc.
  • Made of good material, corrosion and heat resistant, durable. Reliable quality, and long time use.
  • A replacement for the old or broken big bore kit. Please check the size and make sure that you are ordering the correct part for your motorcycle.
  • Package Included: 1 x Master Cylinder, 1 x Cylinder Head, 1 x Piston, 1 x Wrist Pin, 2 x Clamp Ring , 2 x Clamp Ring, 2 x Gasket, 1 x Clamp, 1 x O-Ring, 1 x Wrist Pin Bearing.



Product Description

Standard Image Header With Text

Description:

  • Good quality big bore kit.
  • Compact size, easy installation.
  • 70cc 2 stroke big bore kit for scooters.
  • Good replacement for your old or broken one.
  • Easy to install in few minutes without complicated tools.
  • This is a non-OEM product, accessory only.

Specification:

  • Material: Metal
  • Color: Black, Gray, Silver Tone
  • Displacement: 70cc
  • Master Cylinder Size: 110x95x80mm / 4.33"x3.74"x3.15"(L*W*H)
  • Cylinder Head Size: 100x90x35mm / 3.94"x3.54"x1.38"(L*W*H)
  • Piston Size: 48x47mm / 1.89"x1.85"(H*D)
  • Wrist Pin Size: 38x10mm / 1.50"x0.39"(H*D)

Fitment:

  • for Yamaha JOG / for MinarelliI / for Yamaha Clone Motors
  • for Jonway for Jmstar for Roketa for Sunl for Yamaha

How to Install?

  • 1. Please make sure this surface is clean when start putting a motor together.
  • 2. Please put the studs in it, make sure it can hit four holes with compressed air to pull any debris out.
  • 3. When you get these studs in, this is the path to put the cylinder slide down.
  • 4. When installing the cylinder head gasket, there are pins that will hold the gasket in place to ensure that the gasket is stable during installation.
  • 5. Adjust the valve clearance and finish.

Note:

  • Please allow 1-3cm errors due to manual measurement.
  • Please check the product model and your motorcycle make, model, year before purchasing.
  • Please follow the maintenance manual and correct installation steps to install the product. The installation manual is not included.

Package Included:

  • 1 x Master Cylinder
  • 1 x Cylinder Head
  • 1 x Piston
  • 1 x Wrist Pin
  • 2 x Piston Ring
  • 2 x Clamp Ring
  • 2 x Gasket
  • 1 x Clamp
  • 1 x O-Ring
  • 1 x Wrist Pin Bearing

Dorimar
Reviewed in the United States on February 25, 2025
 
Oliver Kish
Reviewed in the United States on July 13, 2024
I've got to say this is a great kit for the money but not to be run as-is. The cylinder is of a decent casting but all ports needed heavy chamfering so you don't wreck a ring. The port sizes and locations are good and comparable to the big name sport kits. The cylinder head is a direct copy of the polini head and is cut for an o-ring which is amazing. I ended up using no base gasket which lined up the ports perfectly at BDC and used the o-ring instead of the head gasket. This netted a squish of about 1.6mm which is less than ideal but is fine for using cheap gas. Eventually I'll take .5mm off the top of the jug to get the compression up.
VTPete
Reviewed in the United States on August 9, 2023
I ordered this hoping the bolt spacing would fit my 50cc scooter. It doesn't. I would like to request that the seller update their description with more specific notes on bolt spacing. That being said, I am very impressed with the quality of the kit, the packaging and the delivery! I'm going to give it five stars because if this kit will fit your rig, then I think you're going to be very happy with it!
Dark Melody
Reviewed in the United States on November 5, 2023
Came with missing pieces let's see if seller make it right?
Jeffrey Julien
Reviewed in Canada on November 10, 2023
The kit worked great for the first tank of fuel but not even halfway through the second tank it blew up but they refunded me no question asked
Eduardo
Reviewed in the United States on October 27, 2023
Muy bueno el embalaje pero llegó defectuoso
SANDYDOGFPV
Reviewed in the United States on April 17, 2023
I own a scootershop and a drone shop so I deal with parts alot...These came flawless packed..they were finished perfect no deep scratchs ..These are the absolute best head kits for your Honda and many other scooters ...Buy BUY BUY
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