Re: [Honda-C70] After market carb

 

I am planning to soak it for a few days.Then see how it is.The one I am buying,I honestly have no history on it.I am throwing the dice.Joey

Joey Pafumi

--- On Wed, 10/5/11, gandalf@sonic.net <gandalf@sonic.net> wrote:

From: gandalf@sonic.net <gandalf@sonic.net>
Subject: Re: [Honda-C70] After market carb
To: Honda-C70@yahoogroups.com
Date: Wednesday, October 5, 2011, 3:30 PM

 

I've heard to be very careful cleaning out these jets. The best method is to use something softer than the brass their made of. I'm thinking a small plastic rod or something like that. Perhaps a tooth pick or sliver of one. You don't want to scratch the brass jet hole or distort it in any way. I'm rebuilding a Holly two barrel right now. I have put most everything including the jets through a chem dip paint bucket. Parts sparkle when they come out of there after a half hour or hour soak, but you do have to get most of the dirt off first or dip, scrub, dip.

(imagine a cute or dirty tagline here)

On Wed 05/10/11 3:12 PM , Joseph Pafumi joeypafumi@yahoo.com sent:

> The carb was installed with #88 main jet from my original carb.The problem

> was,the new carb leaked from the bowl due to a defective bowl and how the

> gasket fit as well.I was very frustrated.I took the original bowl and

> applied to the new carb.No leak.The problem is it idles smooth,ran

> smooth,but didn't go over 35mph.My first indication something was wrong was

> when it started cold with no choke.I took the new carb off and put it back

> together and I am shipping it back to wincycles.I have decided to by a used

> slow jet,which I am not sure is gummed up as my original was,(I will know

> when I receive it) and install it in my original carb.I will keep you

> posted.I will have this bike running 45MPH again if it is the last thing I

> do.I will not drill this one out as my mechanic did to save time.If this

> doesn't work I will search for another carb. Joey

> Joey Pafumi

>

> --- On Wed, 10/5/11, gandalf@son

> ic.net ic.net> wrote:

> From: gandalf@son

> ic.net ic.net>Subject: Re: [Honda-C70] After market carb

> To: Hon

> da-C70@yahoogroups.comDate: Wednesday, October 5, 2011, 1:40 PM

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> Perhaps the rule of thumb should be if you take an old carb out and put a

> new aftermarket one in, you should carefully clean and inspect the jet from

> the old one and install it in the new one (assuming it wasn't drilled out).

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> (imagine a cute or dirty tagline here)

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> On Wed 05/10/11 12:55 PM , william belleau wjbelleau

> @yahoo.com sent:

> > One of the problems of size is that some carb

> manufactures use a # system

> > that is not based on inside diameter of the

> jetin ether MM or inchs. It is just a number assigned to a flow of fuel.

> The

> > other problem is the shape of the jetfrom the

> large size as it necks down and then flows back to a

> larger 

> > diameter. This shape of the translation can also

> effectthe flow of the fuel so even thought the hole dia of the jet is one

> size

> > the total flow could very well be less then a

> different jetwith a smaller dia hole. Also the finish of the jet can have

> an effect of

> > flow, drilling a jet oversize can at times make

> it flow lessthen it did when original in size. A few manufactures here in

> the US of A

> > that do alot of work with car carburators have

> done flow tests with some very fancy flow benches and have reported studys

> or

> > this very thing. They have also run engines

> ondynos and documented the loss of HP with just a change in jet size

> or

> > drilling out a jet and reinstalling

> it.Bill

> > Portland OR 

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> >

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> >

>

> > ________________________________

>

> > From: myron andrews rews13@hot

> mail.com>To: hon

> > da

> -c70@yahoogroups.comSent: Wednesday, October 5, 2011 12:33

> PM

> > Subject: RE: [Honda-C70] After market

> carb

> >

>

> >

>

> >   Joey :  You & tch may have found

> the reason some people

> > have reported good results & others poor

> results from after market

> > carbs. My oem carb & dratv Sheng Way both

> have #88 main jets .  A

> > correct carb match.  How ever my Chilton

> Big Book lists the english

> > model c70 & c70m as having a #75 main jet .

> The #72 jet is listed as

> > fitting CL70,065/M &CT90 .  Apparently

> Honda uses different jets

> > in different parts of the world . So a supplier

> might say " sure this

> > carb fits a C70 here in China "  &

> be wrong for USA/Canada

> > market.  The only thing that might keep you

> from using your old jet in

> > the new carb is a slight difference in the slide

> needle taper & length

> > that could affect midrange performance. 

> This may help others solve

> > their carb problems .  Good Job !!!! 

> Baby Huey

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> ------------------------------------

>

> C70 Passport Not Running Right?

> 1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw1970-73 C70 Troubleshooting Guide:

> http://tinyurl.com/6ebwtw (scroll to sec.7.1 page

> 101.jpg)1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c1980-81 C70 Troubleshooting Guide:

> http://tinyurl.com/hu42c (scroll to sec.18-1 page

> 170.jpg)1982-83 C70 Troubleshooting Guide:

> http://tinyurl.com/hu42c (scroll to sec. 20-28 page

> 205.jpg)

> 1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn61982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c

> More resources for C70 Passports and Cubs:

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Recent Activity:
C70 Passport Not Running Right?
1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw
1970-73 C70 Troubleshooting Guide:
http://tinyurl.com/6ebwtw (scroll to sec.7.1 page 101.jpg)
1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c
1980-81 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec.18-1 page 170.jpg)
1982-83 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec. 20-28 page 205.jpg)

1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn6
1982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c

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