Re: Moby 50v PHBG carb problem

Andy /

Hmm. I'm not a phbg expert, but I did experiment a lot tuning my 103 with a phbg when I kitted it, unfortunately shortly after I got it all tuned perfectly a circlip failed, thus ending my experiments with phbgs for a while....

Anyhow, one thing to consider with multi-circuit carbs is that throttle position dicttates fuel mixture. The whole point is to have different mixtures depending on different rpms, so you can have a nice rich mixture when you're going super fast, but not so rich that you bog out when you're going slower.

So if you're stopped and you open the throttle all the way, you're gonna be jetted for high rpms.... not off the line, thus, you'd bog. However, if you use the throttle with more finesse, opening it gradually, you'll have better engine response.

You may already know all this and be suffering from a totally different problem, don't mean to tell you stuff you already know, but just make sure you have this in mind.... also I don't know what size carb you have, if it's huge 19-21 or something this problem would probably be more pronounced (and maybe feel like having your motorcycle in 3rd gear when you're only going 20mph, y'know?)

best of luck.

Subject Written By Posted
  Moby 50v PHBG carb problemTopic by: Mikey q Mikey q 01/28/10 03:21AM
  Re: Moby 50v PHBG carb problemRe: Andy Andy 01/28/10 03:40AM
  Re: Moby 50v PHBG carb problemRe: Mikey q Mikey q 01/28/10 03:54AM
  Re: Moby 50v PHBG carb problemRe: Andy Andy 01/28/10 04:00AM
  Re: Moby 50v PHBG carb problemRe: Andy Andy 01/28/10 04:01AM
  Re: Moby 50v PHBG carb problemRe: Mikey q Mikey q 01/28/10 04:17AM
  Re: Moby 50v PHBG carb problemRe: Andy Andy 01/28/10 12:42PM
  Re: Moby 50v PHBG carb problemRe: Marc Marc 01/28/10 02:50PM
  Re: Moby 50v PHBG carb problemRe: Mikey q Mikey q 01/28/10 07:36PM
  Re: Moby 50v PHBG carb problemRe: Marc Marc 01/28/10 08:52PM
  Re: Moby 50v PHBG carb problemRe: .Allen Schlung .Allen Schlung 01/28/10 09:09PM
  Re: Moby 50v PHBG carb problemRe: Mikey q Mikey q 01/28/10 10:27PM
  Re: Moby 50v PHBG carb problemRe: Crackstar X Crackstar X 01/29/10 02:24AM
  Re: Moby 50v PHBG carb problemRe: CtpEDsHED . CtpEDsHED . 01/28/10 10:33PM
  Re: Moby 50v PHBG carb problemRe: Mikey q Mikey q 01/29/10 01:55AM
  Re: Moby 50v PHBG carb problemRe: Mikey q Mikey q 01/29/10 03:10AM
  Re: Moby 50v PHBG carb problemRe: jaym jaym 01/29/10 10:18AM
  Re: Moby 50v PHBG carb problemRe: Andy Andy 01/29/10 03:48PM
  Re: Moby 50v PHBG carb problemRe: Ben Ben 01/29/10 08:05PM
  Re: Moby 50v PHBG carb problemRe: .Allen Schlung .Allen Schlung 01/29/10 08:18PM
  Re: Moby 50v PHBG carb problemRe: Mikey q Mikey q 01/29/10 10:35PM
  Re: Moby 50v PHBG carb problemRe: CtpEDsHED . CtpEDsHED . 01/29/10 10:45PM
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