The Engine: has a stock head, a ruckus variator, Leo Vince pipe , uni filter (taped up 80% to avoid being too lean) a 98 jet ( avoid being lean) and a Honda metro rear wheel. Honda recommended # 8 plug
The Last Ride: I was about 26 miles into a hilly trip when the problem happened
The Problem: I have melted a hole in the center of my piston with some of the piston also being melted at the exhaust port. My cylinder wall is complexly fine, not a single scratch.
From what my Google searches gather if your cylinder wall is not scratched you are not running lean. I also think that an 80% taped up uni filter and a 98 jet would indicate I wasnÔÇÖt lean. Bike does get warm after wot (400-420) but cools down very fast
My questions: 1. what would cause this? 2. Can I just buy a new cylinder put it in and be running?
Also would you guys generally agree with this statement below
Normally a hole in the center of the piston, is indicating the ignition timing to high, because it will spark the plug to early & then there is a big ball of burning fuel right in the middle & it melts the piston.
With lean conditions, it will cause the fuel to burn up to quick & heat the piston to much, make it swell up faster & then seize to the cylinder walls.
If the octane of gas being used, is to low for the amount of compression the engine has, it will normally cause the piston to melt away on the top edge at the exhaust port area, because so hot of a flame being blown out the exhaust port.
ill post pictures this afternoon
