Hey Mike
Yes, Thank you !!! I just glanced over it as I have many things going on
right now and my bike is waiting on jets to come in anyway.
Did you tune HP into your Bike from over what you had originally
received ?
Take care Phil
Michael Jones wrote:
>
> Hey Phil,
> did you get the message I sent you about the tuning info on the Keihin
> Carbs? I just wanted to know if it helped?
>
> Talk to you.
> Michael Jones
> [EMAIL PROTECTED]
> Indianapolis, IN
> 1985 V-Max
> GSX1300R
> V.M.O.A #61
> Midwest Director (Great Lakes: IN, OH, IL, MI, WI)
> Day Time E-Mail [EMAIL PROTECTED]
> ----- Original Message -----
> From: "Phil" <[EMAIL PROTECTED]>
> To: "V-MAX TECH LIST" <[EMAIL PROTECTED]>
> Sent: Wednesday, June 14, 2000 10:12 PM
> Subject: Re: attention flatside carb owners LONG Post!!
>
> > Ok Didn't want to bore the list but will post some of what I found out.
> >
> > As many of you know I am having a rich running problem with my long rod.
> > I ran last week and one pass would be 129MPH and then the next was
> > 126MPH. I would yank my plugs and I found out that I was fouling the
> > plugs pretty bad. I had been experiencing with the mains and I was
> > getting it to foul less but still fouling pretty bad. When I took it to
> > be dynoed it came in at 172Hp corrected and that is what my friends was
> > at so I knew it couldn't be right. The perf shop told me the dyno was
> > telling me my bike was running fine. This makes sense as I found out
> > that they Dyno doesn't correctly interpret the mixture on flatsides cuz
> > it only works at wide open throttle. My mains were ok at wide open
> > throttle BUT my plugs were fouled when I had the dyno done. therefore my
> > HP WAS around 172 but my bike was not running properly at the low end.
> > So when I'm at the track and I run down with a fresh set of plugs my hp
> > was higher than what it had been dynoed at.
> > I called PCW and they started the troubleshooting process with me. Why
> > were my plugs fouling ? I could go on about the mistakes I made in the
> > last week but there were too many so I will talk about the way these
> > things should be tuned. First an overview of what is tunable on these
> > carbs and some history.
> >
> > I never realized where these carbs come from, They are the flatside
> > carbs from Keihin that PCW MODIFYS. I always thought that PCW just
> > acquired them from Keihin as is and did some minor mods to make them
> > work on their big bores. They are the inline carbs and PCW modifys(cuts
> > them into individual carbs) and then fits them to the motor and puts on
> > brackets etc...... First eye opener for me !
> >
> > Tuning
> > The carbs I thought had three adjustments to them Idle mixture, needles
> > and mains. With the order of throttle being 0-1/4, 1/4 to 3/4 and WOT
> > (wide open throttle respectively). I have been trying to launch this
> > bike and in order to get my bike to run have been whacking the throttle
> > too much. I was doing this because the bike just wasn't running to well
> > from 0 -1/2 throttle. Well that is killing my 0-60ft times. I had better
> > times on my stock vmax 0-60 at this altitude. Well, there is also a slow
> > speed circuit which has two adjustments to it. The slow speed jet(SSJ)
> > and the slow speed air jet(SSAJ). The SSJ and the SSAJ are what controls
> > my 0-1/4 throttle. Let me give you some symptoms on my 0-1/2 throttle
> > problems.
> >
> > Problems
> > When I started my bike when it was cold it would start right up.Then
> > after it was running normal temp and I shut it off the bike would barely
> > start......Analysis, RICH RUNNING low end.
> >
> > When I launch my bike it would bog a little and then at 1/2 throttle it
> > would take off like a bat out of hell ......Analysis RICH RUNNING LOW
> > end.
> >
> > My bike was quieter than my friends 1428 long rod
> > (noticably)....Analysis RICH RUNNING low end.
> >
> > Finally When I turned my fuel mixture screws all the way in to max rich,
> > The bike would stay running just fine.....Analysis RICH RUNNING low end.
> >
> > These are classic symptoms of the low end being way out of whack. I
> > talked for about an hour with a guy named Paul Morgan at Sudco
> > (distributor) and he detailed what to do to fix these classic symptoms
> > of the flatsides. One other note the Mechanical activation of these
> > carbs dictates to ROLL the throttle PERIOD. IF you whack the throttle a
> > bunch of fuel runs into your cylinders and doesn't burn properly. A
> > habit very hard to break with my background running stock carbs. Keep in
> > mind the stockers are vacuum advanced such that the fuel is regulated
> > with the engine speed.
> >
> > Back to tuning.
> >
> > The SSJ circuit is a jet by the velocity stack and the jets are changed
> > out with smaller ones for rich running circuits. You use a smaller jet
> > to run leaner as they work with the fuel.
> > The SSAJ circuit can be one of TWO types. Either a needle type OR a jet
> > type. He thinks that I probably have the needle type in my carbs and
> > that they are adjusted all the way in. The jet type regulates air flow
> > and you turn those all the way in. The needle type is adjusted 1 and 1/2
> > turns to get them set appropriately.
> >
> > The needles are like stock carbs and are adjusted with clips closer to
> > the point makes them richer (pulls the needle in more) further out makes
> > them leaner and pulls the needle out more which gives more air to the
> > mixture.
> >
> > The mains for wot are jets and smaller numbers give you less fuel and
> > bigger numbers give you more fuel.
> >
> > I took my bike home tonite and I am convinced that my slow circuit is
> > all screwed up. On the way home I started really feeling the throttle
> > and its response. When I am at 0-1/2 throttle my bike is not pulling
> > very hard and it seems to like bog. When I get to 1/2 throttle and roll
> > the throttle to WOT it just frigging screams. I am going to dive deep
> > into this low speed circuit and get this worked out......
> >
> > I can't wait. I hope this helps and will update the list with what else
> > I find out about this. Some of you guys probably knew this but it was
> > totally eye opening to me.
> >
> > Take care Colo Phil
> >
> > Dennis Clarke wrote:
> > >
> > > Phil,
> > >
> > > why not post for all to read ?
> > >
> > > Dennis
> > >
> > > I found out some interesting things about the flatside carburetors. For
> > > those of you that this is of note to give me an email and I'll fill you
> > > in on the tuning tips that I got from a company today. Absolutely Eye
> > > opening !!
> > >
> > > Take care Phil
> > >
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