Malossi 70cc hobbit ingestion carnage

Jesse Nordlander /

Ran unfiltered to a lesson, just hit 100 miles.

Worked ring off without breaking, filed lands, knocked down the worst and it runs again, yay.

Votes on subsequent miles until failure, I say 3-5 hundred

IMG_20210406_200356744.jpg
IMG_20210406_200719840.jpg
IMG_20210406_212559865.jpg

Re: Malossi 70cc hobbit ingestion carnage

What did it ingest?

Re: Malossi 70cc hobbit ingestion carnage

Buy a new piston. Don't run that...less work than otherwise.

Re: Malossi 70cc hobbit ingestion carnage

> Jesse Nordlander Wrote:

> -------------------------------------------------------

> Ran unfiltered to a lesson, just hit 100 miles.

>

> Worked ring off without breaking, filed lands, knocked down the worst

> and it runs again, yay.

>

> Votes on subsequent miles until failure, I say 3-5 hundred

Compared to the piston I've been running in my FA50 for the last few years , your piston should last at least a couple thousand miles . That's if you run a decent filter and a touch heavy mix ratio .

Re: Malossi 70cc hobbit ingestion carnage

Jesse Nordlander /

It took in the bit of hardware in 2nd pic. Pulled reed valve figuring a screw came out, they did not, were red loctited to begin with.

We will def be running it, be interesting to see if it makes comparable power.

If we get 500 mile, more than happy.

Re: Malossi 70cc hobbit ingestion carnage

Were you using a metal piston stop? Why chance it with that piston when replacements are available and inexpensive ?

Re: Malossi 70cc hobbit ingestion carnage

> Marc Friedman Wrote:

> -------------------------------------------------------

> Were you using a metal piston stop? Why chance it with that piston when

> replacements are available and inexpensive ?

Seriously , what's to chance ?

Re: Malossi 70cc hobbit ingestion carnage

Maybe I'm all wrong but I looked like the top of the piston has metal.removed to the ring landing.

Re: Malossi 70cc hobbit ingestion carnage

> Marc Friedman Wrote:

> -------------------------------------------------------

> Maybe I'm all wrong but I looked like the top of the piston has

> metal.removed to the ring landing.

That shouldn't hurt anything . Might even help . Normally , chamber gases are meant to enter above the ring and to the inside , which applies pressure outward to help gain a better ring seal .

At most , there might be a bit of carbon involved , but ...

Re: Malossi 70cc hobbit ingestion carnage

Jesse Nordlander /

Not gonna lie it is a bit concerning but, there's no cracks at least, I filed down possible hot spots. The missing ring land areas I filed to angle inward behind ring. Like pd days, and I agree that could induce some extra ring seal. This is a registered daily driver, so I will quickly post updates on mileage.

Re: Malossi 70cc hobbit ingestion carnage

So what was that chunk? Any idea.

Re: Malossi 70cc hobbit ingestion carnage

Jesse Nordlander /

It was def a screw or small bolt, you can see the threads. I ripped around on the airport taxiway prior to going home. I know our crappy neighbors (flight school), sling hardware and debris..

On a great note we ran it 13.5 miles, seems to have more power than yesterday, Ran flawlessly.

Will definitely run it rich and 20:1 for the remainder of it's existence.

Very excited to see how long it will go.

Re: Malossi 70cc hobbit ingestion carnage

Id be freeked out knowing that theres potential crap flying around the case. So are tou now running a filter or not? I dont think the super rich oil mux gonna make a difference.

Re: Malossi 70cc hobbit ingestion carnage

I'm with Pat . 20>1 is very oil rich .

32>1 is plenty rich enough and I'd bet it would be fine at 40>1 .

Re: Malossi 70cc hobbit ingestion carnage

The added oil will only make the carbon build up on your pitted piston faster. Unless you are doing super high RPMs even 32:1 is too much. 40:1 is a good place to be for some extra oil lubrication.

Re: Malossi 70cc hobbit ingestion carnage

If you start mixing that rich, you’re going to lean out your bike and seize it for real

Re: Malossi 70cc hobbit ingestion carnage

Jesse Nordlander /

Biggest reason I didn't opt for a $90 piston, is I wondered if anything else may be in there but highly doubted. So after an hour of running it's def clean.

Filter was added of course. Running a 95 jet to offset the increased viscosity of a oil richness. Next tank I will down to 92 and lighten up on the oil.

Re: Malossi 70cc hobbit ingestion carnage

Just get Amsoil saber and mix it 50:1 instead of 100:1

Re: Malossi 70cc hobbit ingestion carnage

Jesse Nordlander /

I did happen on some amsoil saber today, mixed it 40:1. Drained and refilled both the hobbit and peugeot. Difference is very obvious, hobbit is an absolute animal. Ran another 20 miles flawlessly.

Re: Malossi 70cc hobbit ingestion carnage

A plane crashed somewhere. Screw fell out.

NTSB is looking for that thing your moped ate.

Re: Malossi 70cc hobbit ingestion carnage

> Jesse Nordlander Wrote:

> -------------------------------------------------------

> I did happen on some amsoil saber today, mixed it 40:1. Drained and

> refilled both the hobbit and peugeot. Difference is very obvious, hobbit

> is an absolute animal. Ran another 20 miles flawlessly.

Maybe to you , but , explain it for the rest of us . Please . ;)

Re: Malossi 70cc hobbit ingestion carnage

What carb is on the bike?

Re: Malossi 70cc hobbit ingestion carnage

Jesse Nordlander /

I rode the peugeot initially, for the first time it pulled the huge test hill with no help. Airsal 50, Sha 16.

The hobbit speedo for the first time passed over the last 2 odometer digits, something like 55mph!? It covered another 15 miles today, no problems

The hobbit has a phbg 19.5, I machined a delrin adapter with an id of only ~16mm, which is part laziness as I had a 5/8 drill bit.

« Go to Topics — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account