Re: 70cc kstar

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_@Celica – The interior on the cylinder wall is slightly larger (1.5mm), the outside diameter is MUCH larger, 22mmx20mm. I will be the first to admit that I don’t know too much about porting cylinders, it’s why I sent it out to have it done, see what he did and then see how it preformed compared to from factory. What would you have done?_

Well, the port in the wall of the cilinder isn`t much bigger now. You can fit a bigger carburator, but it won`t work because the port is too small. I dont know what kind of caburator you have? For example: if you have a 16mm, you don`t have a problem.

I enlarged mine for a 21mm carb (almost impossible). i raised en lowered the port, en widened it. I wident it 68% of the bore, how much i raised or lowerd it i dont know anymore.. In this way you enlarge the port so yo ucan run on a bigger carb.

I tuned my K-star for high-end power, that`s why i want a large carburator. I dont know if i said it allready, but here`s what i did to my k-star.

A made a spacer, te raise the cilinder. In that way th timings are higher, withouth hurting blowdown. I wanted my exhaustport on 180 degree, and it was 160 or some. Normally i had to raise the port so high, that the puch wont able to ride. Now i raised th cilinder, my exhasutport came on 173 degree, and raised it to 180. In that way the blowdown is not too high, so i can accalerate out of a corner properly.

Except raising the exhaust port, i widen`t it, for more area. Before the transfer ports open, you want as much burned gasses out of your cilinder. The more area above the transfer ports, the better (well. there are exceptions, but normally this will do).

As told, i enlarged my intake port for a 21mm carb. Also the (i don`t know how to say) "way" to the transferports on each side of the cilinder are enlarged for a better flow.

Because i raised my cilinder, i had to design and make a cilinderhead that falls 2mm (or more) into the cilinder. At last i calculate and make a exhaust, and fit a HPi iginition.

i bet i get around 8hp, but i`m aiming for 10. I don`t go very extreme the first time i build this engine, and after the build it comes on a dyno, so i can see how much performance it gives, and were (low or high rpm). After that i can begin to tune it to what i want :)

If anyone wants more info to make your K-star very fast, please send me a mail ;)

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Subject Written By Posted
  70cc kstarTopic by: bryan bryan 10/16/08 08:54PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/16/08 09:04PM
  Re: 70cc kstarRe: Patrick Moped Patrick Moped 10/16/08 10:06PM
  Re: 70cc kstarRe: bryan bryan 10/16/08 10:46PM
  Re: 70cc kstarRe: Patrick Moped Patrick Moped 10/17/08 09:25PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/21/08 10:30AM
  Re: 70cc kstarRe: mark mark 10/16/08 10:56PM
  Re: 70cc kstarRe: mark mark 10/16/08 10:57PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/16/08 11:06PM
  Re: 70cc kstarRe: Patrick Moped Patrick Moped 10/17/08 09:35PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/17/08 10:14PM
  Re: 70cc kstarRe: bryan bryan 10/16/08 11:55PM
  Re: 70cc kstarRe: Tom STL Tom STL 10/18/08 12:09AM
  Re: 70cc kstarRe: rob farmer rob farmer 10/20/08 07:04PM
  Re: 70cc kstarRe: Cory (mrtdr 133) Cory (mrtdr 133) 10/20/08 07:22PM
  Re: 70cc kstarRe: justin turner justin turner 10/27/08 09:10PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/21/08 10:53PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/22/08 08:56PM
  Re: 70cc kstarRe: Tom STL Tom STL 10/23/08 04:11AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/23/08 08:38AM
  Re: 70cc kstarRe: rob farmer rob farmer 10/23/08 01:21PM
  Re: 70cc kstarRe: Mike Thomas Mike Thomas 10/23/08 04:01PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/23/08 07:16PM
  Re: 70cc kstarRe: David David 10/23/08 08:10PM
  Re: 70cc kstarRe: Mike Thomas Mike Thomas 10/23/08 09:51PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/23/08 09:52PM
  Re: 70cc kstarRe: Tom STL Tom STL 10/27/08 10:25PM
  Re: 70cc kstarRe: justin turner justin turner 10/27/08 10:41PM
  Re: 70cc kstarRe: William William 10/28/08 01:54PM
  Re: 70cc kstarRe: justin turner justin turner 10/28/08 03:16PM
  Re: 70cc kstarRe: mark mark 10/28/08 04:39PM
  Re: 70cc kstarRe: 🇮🇹💦 Of the Loin 🇮🇹💦 Of the Loin 10/28/08 04:45PM
  Re: 70cc kstarRe: ) Cupermcnewbster ( ) Cupermcnewbster ( 10/28/08 05:38PM
  Re: 70cc kstarRe: Mike Thomas Mike Thomas 10/28/08 05:45PM
  Re: 70cc kstarRe: justin turner justin turner 10/28/08 06:56PM
  Re: 70cc kstarRe: ren ren 10/28/08 07:06PM
  Re: 70cc kstarRe: ) Cupermcnewbster ( ) Cupermcnewbster ( 10/28/08 07:06PM
  Re: 70cc kstarRe: justin turner justin turner 10/28/08 07:36PM
  Re: 70cc kstarRe: AndyC. AndyC. 10/29/08 01:14AM
  Re: 70cc kstarRe: justin turner justin turner 10/29/08 03:50AM
  Re: 70cc kstarRe: justin turner justin turner 10/29/08 03:52AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/29/08 10:15AM
  Re: 70cc kstarRe: rob farmer rob farmer 10/29/08 12:41PM
  Re: 70cc kstarRe: bryan bryan 10/29/08 02:02PM
  Re: 70cc kstarRe: Colinswoop . Colinswoop . 10/29/08 02:10PM
  Re: 70cc kstarRe: justin turner justin turner 10/29/08 02:33PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/29/08 02:53PM
  Re: 70cc kstarRe: Tom STL Tom STL 10/29/08 03:34PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/29/08 04:37PM
  Re: 70cc kstarRe: mark mark 10/31/08 05:56PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 10/31/08 08:26PM
  Re: 70cc kstarRe: mark mark 10/31/08 11:08PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/01/08 12:07AM
  Re: 70cc kstarRe: L V L V 11/01/08 08:45AM
  Re: 70cc kstarRe: L V L V 11/01/08 08:52AM
  Re: 70cc kstarRe: bk bk 11/01/08 09:22AM
  Re: 70cc kstarRe: L V L V 11/01/08 09:35AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/01/08 05:18PM
  Re: 70cc kstarRe: bk bk 11/01/08 06:21PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/02/08 03:08AM
  Re: 70cc kstarRe: L V L V 11/02/08 08:14AM
  Re: 70cc kstarRe: Tom STL Tom STL 11/02/08 10:50AM
  Re: 70cc kstarRe: Tom STL Tom STL 11/03/08 05:32AM
  Re: 70cc kstarRe: Derk Jan. Derk Jan. 11/03/08 09:50AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/03/08 10:09PM
  Re: 70cc kstarRe: rockles rockles 11/03/08 06:00PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/03/08 09:34PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/03/08 09:37PM
  Re: 70cc kstarRe: rockles rockles 11/03/08 11:45PM
  Re: 70cc kstarRe: rockles rockles 11/03/08 11:46PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/04/08 05:49AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/04/08 10:04AM
  Re: 70cc kstarRe: justin turner justin turner 11/04/08 02:49PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/05/08 10:32AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/06/08 08:32PM
  Re: 70cc kstarRe: Graham Motzing Graham Motzing 11/06/08 09:31PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/06/08 09:47PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/07/08 06:51PM
  Re: 70cc kstarRe: Pablo Puchasso Pablo Puchasso 11/07/08 07:47PM
  Re: 70cc kstarRe: ovc ovc 11/07/08 08:47PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/08/08 05:14AM
  Re: 70cc kstarRe: Flagrant - Flagrant - 11/08/08 04:29PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/08/08 10:44PM
  Re: 70cc kstarRe: Flagrant - Flagrant - 11/08/08 11:14PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/09/08 12:42AM
  Re: 70cc kstarRe: rob farmer rob farmer 11/12/08 08:11PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/12/08 09:30PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/13/08 03:30AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/13/08 08:30AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/24/08 08:05AM
  Re: 70cc kstarRe: rob farmer rob farmer 11/13/08 12:43PM
  Re: 70cc kstarRe: mark mark 11/13/08 03:08PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/13/08 06:34PM
  Re: 70cc kstarRe: justin turner justin turner 11/13/08 07:30PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/13/08 08:02PM
  Re: 70cc kstarRe: L V L V 11/14/08 02:46PM
  Re: 70cc kstarRe: justin turner justin turner 11/14/08 03:16PM
  Re: 70cc kstarRe: st. paul sam st. paul sam 11/14/08 04:04PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/14/08 05:10PM
  Re: 70cc kstarRe: justin turner justin turner 11/14/08 07:23PM
  Re: 70cc kstarRe: maciek maciek 11/14/08 10:02PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/17/08 10:35AM
  Re: 70cc kstarRe: ez da snow man !! ez da snow man !! 11/17/08 11:33AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/17/08 09:19PM
  Re: 70cc kstarRe: Flagrant - Flagrant - 11/17/08 02:12PM
  Re: 70cc kstarRe: ) Cupermcnewbster ( ) Cupermcnewbster ( 11/18/08 02:45AM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/22/08 09:34AM
  Re: 70cc kstarRe: Tom STL Tom STL 11/24/08 12:06AM
  Re: 70cc kstarRe: rockles rockles 11/24/08 04:37AM
  Re: 70cc kstarRe: rockles rockles 11/24/08 03:29PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/25/08 09:54AM
  Re: 70cc kstarRe: Tom STL Tom STL 11/25/08 12:14PM
  Re: 70cc kstarRe: L V L V 11/26/08 09:24AM
  Re: 70cc kstarRe: rockles rockles 11/27/08 08:54PM
  Re: 70cc kstarRe: justin turner justin turner 11/28/08 07:01PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/28/08 08:59PM
  Re: 70cc kstarRe: justin turner justin turner 11/28/08 09:13PM
  Re: 70cc kstarRe: rockles rockles 11/29/08 12:47AM
  Re: 70cc kstarRe: r r 11/29/08 03:51PM
  Re: 70cc kstarRe: Flagrant - Flagrant - 11/29/08 04:07PM
  Re: 70cc kstarRe: justin turner justin turner 11/29/08 04:21PM
  Re: 70cc kstarRe: r r 11/29/08 04:48PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/29/08 10:32PM
  Re: 70cc kstarRe: Jesse -B Jesse -B 11/29/08 11:17PM
  Re: 70cc kstarRe: Tom STL Tom STL 11/30/08 12:19AM
  Re: 70cc kstarRe: Matthew Verdes Matthew Verdes 12/06/18 03:05PM
  Re: 70cc kstarRe: Crazy Wayne Crazy Wayne 12/06/18 05:07PM
  Re: 70cc kstarRe: Matthew Verdes Matthew Verdes 12/09/18 01:21PM
  Re: 70cc kstarRe: Matthew Verdes Matthew Verdes 12/09/18 01:26PM
  Re: 70cc kstarRe: Alex Hedrick Alex Hedrick 01/14/19 06:37PM
  Re: 70cc kstarRe: EH 📣FCC of the QCB EH 📣FCC of the QCB 01/14/19 09:14PM
  Re: 70cc kstarRe: Alex Hedrick Alex Hedrick 01/14/19 09:21PM
  Re: 70cc kstarRe: Alex Hedrick Alex Hedrick 01/14/19 09:26PM

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