421 cub snagged ring?

[knelson]

I'm done in the garage for the night, going to pull a fuel sample tomorrow. If he forgot to mix his fucking gas he deserves it, and it won't happen again (hopefully he's not that dumb, right?) 

[sheerider11]

 

Holy shit. Are you sure the jetting was right?

I'd really check that fuel. And ask him how he mixed it. He may have done it and made 500:1 ratio

[knelson]

34 pjs cel mid clip,165 main 50 pilot , choke out 4, air screw 1 turn. He's running t-6's on it....yea I know

[n2otoofast4u]

So let me get this straight...............

 

He buys from a site sponsor.

 

Clearly didn't have something correct.

 

Now he's gonna buy from Ebay.

 

You say FAST

 

All the while the original sponsor provided what was asked for, yet won't get the second sale because of stupidity???????

 

Noted!

[knelson]

Only one I have personally ever used, Only reason I stated him. I have no alterior motives I promise. He isn't on here I asked him. I guess he heard about builder from others or found him on web search

Edited April 21, 2016 by knelson

[n2otoofast4u]

Regardless, I'd have a REALLY hard time putting and blame or disbelief in the builder.

[sheerider11]

Something isn't adding up. Either him, or you aren't saying the whole deal.

[knelson]

He was going to hurrily buy kit on ebay tonight and I told him not to It would be wise to have a set of experienced eyes go over new cylinders and some kind of casting clean up. Builder won't lose second sell and will get first option unless it is cheaper or equal to cost from builder I have experience with's posted price on website, nothing more. I will post pic of fuel sample, I just want to find the Issue and fix it...

[sheerider11]

Pics of fuel won't do any good. Yama lube is dark as hell. One teaspoon in a 5 gallon jug will turn it dark blue.

[knelson]

well then I guess you guys helped diagnose it. lack of lube it is and I get to call  and tell the builder what had happened tomorrow. Guess I could email pics tonight.Also probably should go through the brand new pj carbs again and recheck float height, jetting,etc... and dump fuel

[knelson]

Something isn't adding up. Either him, or you aren't saying the whole deal.

What Part isn't adding up? I am pretty sure at this point it is his fault, he picked it up on the 4/10 and said he rode 23 miles and it ran great. 4/12 he sends me a pick of a broken tierod out riding.4/16 he asks me to help rejet cause it's bogging. I tell him to swap plugs, he says they are blackish 4/18 he brings it back over 4/20 I finally get to disassemble and here we are.. I guess I am the dumb one for not figuring out lack of lube and even questioning the build. Although upset he was pretty quick to want to buy replacement as cheap as possible and not place blame..maybe he knows he's at fault and isn't telling me 

Edited April 21, 2016 by knelson

[sleeper06]

Is the little pin still in the the piston that locates the ring

[Larry's Shee]

Can't see well enough on this tablet, but is that normal/usual amount of chamfer on ex port ?

Is bad piston from dome with less carbon ?

If it was fuel mix why is one piston worn considerably more?

Was this builder assembled ? Leakdown tested before running ?

Tested before disassembly?

[trickedcarbine]

Tell your buddy to learn how to mix fuel.

[BANSHEE HP]

ring end gap checked ever? what was the piston to bore clearance?