PHBG masters please help

Calvin Laszakovits /

Hey guys and girls who know their way around a phbg carb! I’ve recently upgraded to a 19mm with an 18mm intake on a polini 70cc kit. The bike is a ‘78 Garelli GranSport. Up to about 1/2 throttle, maybe a little over, it runs top, it runs perfectly. Once I hit about 40mph and am in the top end of the throttle, it starts bogging out. It usually needs a moment to recover and figure itself back out if I go into that bad zone. If I hold throttle all the way open, it bogs down, and then does a weird revving thing where it slightly revs up and down but goes real slow. I’ve tuned and returned my gas/air ration screw, set my idle jet (42), and changed my main jet everywhere between 86-94. I have the needle on the second leanest setting.

I’ve checked for airleaks, all seems to be good. Timing should be right on the mark. I have an estoril sidebleed pipe and a high flow filter on the bike. What am I missing?!

Any help on where to go from here would be amazing.

Thanks everyone!

Subject Written By Posted
  PHBG masters please helpTopic by: Calvin Laszakovits Calvin Laszakovits 10/30/17 10:36PM
  Re: PHBG masters please helpRe: #CrazyWayne™ rocks. #CrazyWayne #CrazyWayne™ rocks. #CrazyWayne 10/30/17 10:42PM
  Re: PHBG masters please helpRe: Ilia Edouardovich Ilia Edouardovich 10/30/17 11:14PM
  Re: PHBG masters please helpRe: Marc Friedman Marc Friedman 10/31/17 01:26AM
  Re: PHBG masters please helpRe: #CrazyWayne™ rocks. #CrazyWayne #CrazyWayne™ rocks. #CrazyWayne 11/01/17 09:49AM
  Re: PHBG masters please helpRe: pat splat pat splat 10/31/17 06:22AM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/01/17 11:57AM
  Re: PHBG masters please helpRe: Stephen Simmons Stephen Simmons 10/31/17 06:46AM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/01/17 11:42AM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/01/17 05:15PM
  Re: PHBG masters please helpRe: Ryan N. Ryan N. 10/31/17 10:24AM
  Re: PHBG masters please helpRe: Full Tuck Full Tuck 10/31/17 01:08PM
  Re: PHBG masters please helpRe: Full Tuck Full Tuck 10/31/17 01:16PM
  Re: PHBG masters please helpRe: Marc Friedman Marc Friedman 10/31/17 07:14PM
  Re: PHBG masters please helpRe: Ken Roff Ken Roff 10/31/17 08:31PM
  Re: PHBG masters please helpRe: Marc Friedman Marc Friedman 11/01/17 04:24AM
  Re: PHBG masters please helpRe: Full Tuck Full Tuck 11/01/17 08:20AM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/01/17 11:55AM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/09/17 09:23PM
  Re: PHBG masters please helpRe: Marc Friedman Marc Friedman 11/10/17 02:04AM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/10/17 07:53AM
  Re: PHBG masters please helpRe: pat splat pat splat 11/10/17 07:58AM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/10/17 10:43AM
  Re: PHBG masters please helpRe: todd amundson todd amundson 11/10/17 02:11PM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 11/10/17 02:40PM
  Re: PHBG masters please helpRe: Mikey Antonakakis Mikey Antonakakis 12/15/17 01:17PM
  Re: PHBG masters please helpRe: Mikey Antonakakis Mikey Antonakakis 12/19/17 03:26PM
  Re: PHBG masters please helpRe: Calvin Laszakovits Calvin Laszakovits 12/19/17 04:39PM
  Re: PHBG masters please helpRe: Mikey Antonakakis Mikey Antonakakis 12/19/17 04:45PM
  Re: PHBG masters please helpRe: Mikey Antonakakis Mikey Antonakakis 12/19/17 09:38PM
  Re: PHBG masters please helpRe: pat splat pat splat 12/20/17 12:19AM
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