Piston I got an Objection with a different shape. Piston lower polishing, according to it polished lower part of Cylinder. I've come with an instruction manual for ignition Timing's advance, but now I'm breaking in.. Since Carburetor setting seems to be burning, set it to a thick eye, 2 STEngine oil 10 in Tank : Mixed with 1.
Separate lubrication remains intact. Anyway, if you do not start from a dark eye, I think that you will probably get burned. It was 40 kilometers per hour for accustoming to me, and it was clearly stated that you should run 100 kilometers. For now, I'm accustomed to rough setting with Carburetor setting, Main jet ordering, but please be careful with burning.
333.61 ~ USD (49,500 JPY)
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Product detail
[Set components]
・Piston
・Piston ring
・Ported cylinder
・Gasket
・Piston Tweezers
・Woodruff Key
・Woodruff Key
・Instruction Manual
[Specification]
・Piston rings pre-installed
・63cc big bore type: 44Φ for two rings
・72cc big bore type: 47Φ for two rings
**Autoboy products require specialized knowledge for installation.We do not accept returns, exchanges, or refunds due to damage to other parts or malfunctions after installation.
*Front sprocket is not included..
* The image is only for reference. The image shown may differ from the actual product.
The intake and exhaust ports are enlarged by hand with the know-how gained from racing.
These features make the intake and exhaust more efficient than other products and greatly increase the power from low to high speed.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.