(3)- Two Stroke Piston Problems

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[NoMoreC2]

A very helpful and clear video series.Well done

[DIOSpeedDemon]

@NoMoreC2 THANKS. I have about a 1000 more moped videos you can watch on all phases of these little bikes. I hope you find them usefull and thanks again.

[yz100f]

hey what about shaving the head to boost compression does that help at all^

[DIOSpeedDemon]

@yz100f Shaving the head is supposed to give you more compression , but you have to know exactly what to do , because if you take too much off and have piston-slap when the motor gets up to speed, you will destroy the piston and the engine. I have never done it personally, but I would use a compression gauge and take very good measurements for clearance before I risked it. ALSO gas is watered down crap these days and detonation is a very big problem with crummy pump gas. RH DSD

[LordFabs]

@yz100f You can change the shape of the inside of the head, look up "squish band"

[myidisjustfine]

@xcr800imp damage to the exhaust side of the piston were it erodes the piston edge towards the top ring means lean.... av got that and it looks like it has effected th way the ring moves (not so freely )

[myidisjustfine]

my piston ring out a honda cr 125 (just got new piston and re boar ran it in v well) using it out on track and it dies.. get it home and its ok again .. then it dies again .. there are similar marking as in ya vid nothing deep but my piston ring is well tight !! i have re oiled it and shaved some of the groove where i think its tightest and am going to put it back together tomoro

[TheAnigai]

what exactly are seize marks? how can they occur? can you still use the piston and/or the cylinder is if you repair it with the marks remaining?

thanks

[sbdem1986]

I like the videos but honestly there's just so many causes for piston seizure. Like water in the fuel, carbon deposits on exhaust port of cylinder, there's even ways to figure out what went wrong just by looking at scoring PATTERNS, it's crazy...

[bajdlek]

thx usefull

[z0ne276]

I have an Airsal T6 Racing 70cc cylinder kit, the piston has Airsal written on it, next to the Airsal is a arrow.

The arrow is supposed to point down.