Red-85-Z51 wrote:Was a defective Z9Y Champion plug, right out of the box it was bad. Caused the misfire and lack of quality running.
Unfortunately my success was shortlived...once I was able to warm it up, I found the original cause of the engine failure...a hiarline crack in the cylinder head on the bottom at the oil feed jacket....vomits oil when hot, runs into the plastic shroud, then onto the frame and exh. pipe..
New head on the way...
Really disappointed in Blade...This was a factory defect, and them and their warranty company were hesitant at first to rebuild the engine because "They should have noticed the oil leak" and "checked the oil".
Well having seen the oil leak now firthand, I can say that if I wasnt on a clean shop floor, I wouldnt have noticed right off myself.
Im so sick of these POS chi-com 150 motors, I swear I feel so sorry for all the people that ar dropping 2K+ on these buggys with these engines, they are nothing but trouble. Fragile electronics, finicky CV carbs, electric chokes...and not to mention the cylinders are taper honed, and the pistons are tapered right out of the box...the fit is terrible and I dont know how they even run.
Ive got rebuilding one of these things down to an art...and have made a few custom tools for fixing various degrees of blown engines...like...
When the motor goes so low on oil the wrist pin sizes to the rod...you use an air saw to cut the crown of the piston and rings, then use a chisel to split the piston in half, then use a custom puller to pull the wrist pin out of the rod.
Then use some sandpaper on a dowel and gently cleanup the small end of the rod.
Beats splitting that aweful crankcase to replace the crank/rod and all those seals and gaskets..
Some folks love 'em, some hate 'em. I kinda like 'em myself. I here ya about tools too, it it requires a special tool, you're gonna make it.I even fabbed my own fly cutter and fixture for boreing out the 59cc cases for BBK kits, sorta like a 7/8 scale of the cutter I use on the 150 cases. As for case splitting, been doing it on so many different types of engines, I don't even think twice about it.
You're braver than I though. Once I've had any seizure, wrist pin, crank pin, or main, that crank is trash, I replace 'em. Usually up grade to a 2mm stroker, with a 59mm BBK that I mill .030" off the top of rhe piston .... 170cc, that screams!
PS, I never run anything but NGK Iridium plugs, 6.97 at Auto Zone