Re: General 5-Star Build - Fast 50cc Single-speed

Mikey Antonakakis /
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Popped in a W11 (I think? 1.80mm tip, vs 1.40mm previous) needle, a 32 pilot, and tried 80 main (vs last attempt at 69, too lean up top, lost power).

The reason for the needle and main jet change: it was running rich at WOT at lower RPM, and lean up top. Now, this was news to me, but revalatory: according to Wobbly over at KiwiBiker, your main jet DOES NOT control WOT at lower RPM if it's in the ballpark - that's up to the needle tip diameter and needle jet! With a 260ish needle jet and 1.4mm-ish needle tip diameter, you end up with a huge annular area in comparison to the area of a 80ish main jet. Like roughly 5x the area. You get an extra boundary layer that slows the flow down a bit (the needle). Apparently you can pull the main jet out of the carb, and if your needle is right, you can go WOT up to some set RPM, at which point the main jet takes over and you'll get too rich.

This concept worked, quite well. FINALLY I got some heat in the pipe. Hadn't seen it exceed 450C, ever, before this. Almost got up to 700C at one point, with a good amount of time at 600-ish. Target zone is apparently around 650. Going WOT cooled it down a little, so may need to go down a touch on the main jet.

Definitely the best the bike has run so far. Will get a new video soon.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  General 5-Star Build - Fast 50cc Single-speedTopic by: Mikey Antonakakis Mikey Antonakakis 09/03/19 03:20PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 03:32PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 04:14PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 04:21PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 04:46PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Overpriced Parts Overpriced Parts 09/03/19 05:10PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 05:19PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 06:08PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 06:22PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 06:32PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 06:41PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 06:49PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 06:55PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 06:59PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 07:05PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 07:13PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/03/19 07:43PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Aaron Blair Aaron Blair 09/03/19 09:23PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Johnnie Distefano Johnnie Distefano 09/04/19 12:39PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/04/19 03:44PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Chris Squid Chris Squid 09/04/19 08:25PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: ken gilbert ken gilbert 09/05/19 05:32AM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 11:03AM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 11:23AM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 11:39AM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 11:47AM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 12:07PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 12:19PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 12:25PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 12:32PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 12:37PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 12:43PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Brandon Weiss (Detective brandon to you) Brandon Weiss (Detective brandon to you) 09/05/19 12:44PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 02:17PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: alex . alex . 09/05/19 02:03PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 02:20PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 02:26PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: ken gilbert ken gilbert 09/05/19 02:22PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 02:33PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 02:41PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 03:09PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 03:15PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/05/19 03:47PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/06/19 01:18AM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/06/19 01:46AM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/12/19 11:03PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/14/19 10:21PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Born to be WillD Born to be WillD 09/18/19 07:33PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/18/19 07:49PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Alex Hedrick Alex Hedrick 09/21/19 02:30PM
  Re: General 5-Star Build - Fast 50cc Single-speedRe: Mikey Antonakakis Mikey Antonakakis 09/21/19 10:16PM

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