Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50ii

ҎаЬlο Ŕivӗгa /
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> live ɘvil Wrote:

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

> > 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?

> >

I am now strongly considering an aluminum cylinder kit (yes I know more devastating if it *does* seize) and fatter aluminum head (but still air-cooled), maybe even a bigger/better carb and less restrictive intake to take a stab @ cooling this Hot Mama down. Does anyone know anything about exhaust cooling rings?

I was running 60:1 Saber, not sure about the miles, don't have an odometer and my speedo stopped working (would make things fun if I got pulled-over) ;-D

Just came to think of it though, bike was running great at higher altitude ~5000 ft, then I moved to lower altitude ~2500 ft and much warmer temperatures, so DOH! Did I totally goon-it not re-jetting? Was using an 82 jet on stock carb I hadn't cleaned for a while, and feel like I've read about Hobbittss jetting 90-something, 100-something with bigger carbs --- maybe I was running tooo lean??!? ;-o

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Subject Written By Posted
  70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiTopic by: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/18/19 07:06PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Jack Rutherford Jack Rutherford 08/18/19 07:59PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: live ɘvil live ɘvil 08/18/19 08:00PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Jack Rutherford Jack Rutherford 08/18/19 08:30PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/19/19 01:31AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: live ɘvil live ɘvil 08/19/19 02:53AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/20/19 12:20AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Captain Janeway Captain Janeway 08/18/19 11:36PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/19/19 01:26AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/19/19 01:28AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Captain Janeway Captain Janeway 08/19/19 06:40PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/20/19 12:26AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/19/19 01:25AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Jack Rutherford Jack Rutherford 08/19/19 05:41PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/20/19 12:29AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Marc Friedman Marc Friedman 08/20/19 03:56AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/25/19 08:44PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: live ɘvil live ɘvil 08/25/19 09:11PM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/26/19 03:01AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Marc Friedman Marc Friedman 08/26/19 01:17AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Marc Friedman Marc Friedman 08/19/19 11:27AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/20/19 12:23AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Marc Friedman Marc Friedman 08/26/19 01:25AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/26/19 03:17AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/26/19 03:32AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: live ɘvil live ɘvil 08/26/19 07:56AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/28/19 12:43AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Marc Friedman Marc Friedman 08/26/19 11:31AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: ҎаЬlο Ŕivӗгa ҎаЬlο Ŕivӗгa 08/28/19 12:41AM
  Re: 70cc 46mm DR Kit died - Is the Cylinder Toast? - Hobbit pa50iiRe: Marc Friedman Marc Friedman 08/26/19 01:37AM

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