> Pablo Rivera Wrote:
> -------------------------------------------------------
> > live ɘvil Wrote:
>
> > -------------------------------------------------------
>
> > Blow by without question. The remaining rings in first pic are still
>
> > wedged in grooves. Overheated without question. I'm sure the underside
>
> > of piston dome is charred, but a pic would be nice too. That clip came
>
> > out and seized it. The bottom of cylinder broke off when you had to
>
> > force it apart becasue of the wedged circlip. 400 degrees is danger
> zone
>
> > and you exceeded that by how much total? Looks to have reached 400
>
> > degrees more than once. Everything in pics is toast but I hope rod and
>
> > crank aren't.
>
> I ran over 400 several times and thought it was no biggie, although it
> did make me nervous and hoped wouldn't go higher. Sorry if this has
> already been discussed in full elsewhere here, but what would you say is
> a normal/safe head temp to run on a kitted Hobbit?
I can't say for sure with a 70cc, but this original honda 49cc kit I have on an nc50 express always has run hot wide open on warm days. Its a common complaint with cast iron Hondas. I suppose retarding ignition timing would help. A colder plug only seems to delay the inevitable high temps on mine.
When I took mine apart it looked a little toasty but the rings and landings were not full of crud.
What oil and mix are you using? How many miles on this?
(edited)