Who me? Huh? What?Master hack... looking at you Mr. Hopped up 301
Sorry hack. I meant ponchodog. He's the one with the 301.Who me? Huh? What?
NR Racing.
88mmThe answer is still NR...
BTW the gx 390 is 80MM if l membur rite!
What I found…. Not sure about thickness though. I didn’t even know common thicknesses were 1.2 and 1.5 mm.Sorry hack. I meant ponchodog. He's the one with the 301.
Bob, i think those listed for the trx300 arent really 80mm. Something doesn't sit well with that. Every where I look the trx300 was listed as a 74mm.
I did find a Polaris rzr 800 had 2 80mm pistons. I can't find any info if they are 1.2mm thick or 1.5mm.
Gonna call some places tomorrow and see.



I was looking at the gx240 / gx270 and I don’t think it said 80mm for either, but the info was suspect anyway since it gave the exact same bore and stroke for the 240 and 270 which upset me. LolCould swap pistons i supposed. But what's the pin height and skirt length?
I see NR has this for a gx270 which i believe is 80mm.
View attachment 151166
View attachment 151167
Adding that .015 might run into my valves. Ive taken .040 off the head but i dont remember my final PtV clearance.
what diameter is the wrist pin? Will it match to what I have? The 301 had different size for hemi (18mm) and wedge head (15mm)

Went in for some spark plugs for my bike. It was getting a little hard to start. Mag fired kick only. Had a few old ones in my bag but didn't have any clean ones.Calling around for kart parts the best.
Do you have 80mm piston rings?
What vehicle is it for?
Was it the 2-door plugs or the sedan?Went in for some spark plugs for my bike. It was getting a little hard to start. Mag fired kick only. Had a few old ones in my bag but didn't have any clean ones.
Told the guy I need two j12yc plugs.
What make and model?
I just gave you the part number.
I still have to look it up to know what shelf....
OK, I'll play along.. it's a 1968 xlch.
:typing: 1968.... um it doesn't go back that far. Let me try the make.
Harley davidson.
Umm, :scrolling: i don't see harley davidson
Yes I knew this already, that's why I gave you the part number. Take me back to plugs. I'll look myself.
Took me like 30 seconds to make sense of the stocking order and found my plugs. Bought a box of 4 so I didn't have to come back anytime soon.
Right about now the Home Depot returns desk is busy processing all the Christmas decorations that "don't fit".After a month working in retail… if all else fails do what everyone else does…. Buy a new 301cc, remove the rings, return the engine saying no compression / doesn’t start.
It seems to be common for customers to just steal what they want and return the rest, or a different tool, or a rock, or stuff from the side of the road.