HI,
I think you can get pretty close to 55 with your passport, changing the front sprocket for a bigger one and with good tunning make sure your carburetor is super clean and it haves the right jet. I do 50 in my passport when I push it 45 comfortably and I have the stock sprocket. I think some cdi and some carburetors have restrictions. you should check for that. I am not sure if you have points or a cdi but I know for a fact that bikes w/ points go a little faster. If all that fails get a honda 90cc or a lifan engine they swap very easy.
Good luck with your project.
--- On Tue, 4/19/11, robert <icardvarks@yahoo.com> wrote:
From: robert <icardvarks@yahoo.com>
Subject: [Honda-C70] Re: Can I do something to increase speed??
To: Honda-C70@yahoogroups.com
Date: Tuesday, April 19, 2011, 3:02 PM
It is strange that almost the first question I am asked about my passports around town are "How fast does it go?" then from new owners "how can I make it go faster".
A good Running classic passport can cost as much as faster newer used motorcycle, Obviously we are not in it for the speed.
I keep mine for the nostalgia and to own a bit of working history, plus the eclectic look and feel of owning something that is usually much older than the person asking about it.
In a world of throw away plastic and video games , to see good quality and craftsmanship still in use after all these years will turn heads and lend a blast from the past.
A nice looking passport will usually gather a crowd at scooter rallies and meet-ups rides. I often hear from organisers that "we even have a old honda passport in our group" when recruiting new members.
Its not about speed but about getting thier in style.
A honda passport parked, in itself is a thing of beauty at zero miles per hour.
--- In Honda-C70@yahoogroups.com, myron andrews <mvandrews13@...> wrote:
>
>
> Shame on you folks for telling the new guy to tie himself to the back of a truck for more speed . Even if he did wear off 100 Lbs or so being drug by the truck he would surely end up with 100 Lbs. of casts & bandages . Next they will tell some one to go to the airport & stand behind jets taking off for a quick tan [extra crispy] . The days of 50`s 70`s & 90`s being learner bikes are gone . If you need 55MPH you need a 250cc or larger bike just to not be run over by an SUV driver on their cell phone. Baby Huey`s 2 cents
>
>
>
> To: Honda-C70@yahoogroups.com
> From: rogueeve@...
> Date: Tue, 19 Apr 2011 17:12:29 +0000
> Subject: [Honda-C70] Re: Can I do something to increase speed??
>
>
>
>
>
>
>
> So I hear, but the only issue I see with this plan is that those kinds of large semi-trucks good for drafting aren't commonly found just toodling around the city. In order to catch one you'd have to jump on the expressway and get up to 55 or so...kind of a catch-22.
>
> Maybe you could ride wide open down the shoulder, and as one goes hurtling past you swerve at the last second and hope to get sucked along behind it.
>
> --- In Honda-C70@yahoogroups.com, A <ak6666666@> wrote:
> >
> > I guess following a large, drag producing truck, will in itself reduce air drag and reduce petrol consumption and also increase speed without tying anything to the truck.
> >
> > --- On Tue, 19/4/11, A <ak6666666@> wrote:
> >
> > From: A <ak6666666@>
> > Subject: Re: [Honda-C70] Re: Can I do something to increase speed??
> > To: Honda-C70@yahoogroups.com
> > Date: Tuesday, 19 April, 2011, 17:30
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Â
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Super great idea!!! :)
> >
> > If Im not pulled over by traffic police, I might try that.
> >
> > But I should be able to release the cable at will whenever I feel the need. I guess I can untie the cable and let it go with the bumper. Zero petrol cost, high speed, but truck will kick up some dust in the air.
> >
> >
> >
> > --- On Tue, 19/4/11, robert <icardvarks@> wrote:
> >
> >
> >
> > From: robert <icardvarks@>
> >
> > Subject: [Honda-C70] Re: Can I do something to increase speed??
> >
> > To: Honda-C70@yahoogroups.com
> >
> > Date: Tuesday, 19 April, 2011, 17:25
> >
> >
> >
> > Â
> >
> >
> >
> > or
> >
> >
> >
> > To increase top speed and save gas you ...
> >
> >
> >
> > A. find a truck heading in the direction you want
> >
> >
> >
> > B. follow it till you come to a stop light
> >
> >
> >
> > C. tie a rope from his bumper to your handle bars
> >
> >
> >
> > D. kick back and enjoy the ride
> >
> >
> >
> > --- In Honda-C70@yahoogroups.com, "A" <ak6666666@> wrote:
> >
> >
> >
> > >
> >
> >
> >
> > > My cd70 does 48 mph.
> >
> >
> >
> > > To increase top speed Id look at the following:
> >
> >
> >
> > >
> >
> >
> >
> > > Proper tuning.
> >
> >
> >
> > > Relative thin engine oil.
> >
> >
> >
> > > Full tire pressure.
> >
> >
> >
> > > Clean air filter
> >
> >
> >
> > > Clean exhaust pipe
> >
> >
> >
> > >
> >
> >
> >
> > > Remove air drag as much as possible by...
> >
> >
> >
> > > a) removing rear view mirrors
> >
> >
> >
> > > b) no head wind
> >
> >
> >
> > > c) warm air is less dense
> >
> >
> >
> > > d) lie down on motorcycle of keep head low
> >
> >
> >
> > > e) tight fitting clothes
> >
> >
> >
> > > f) I wonder if hi octane fuel will help or not
> >
> >
> >
> > > g) smooth road
> >
> >
> >
> > > h) can covering wheel spokes with disks help?
> >
> >
> >
> > > i) aerodynamic helmet
> >
> >
> >
> > > j) can large front wheel mud guard contribute, so that front part covers lot of the tire?
> >
> >
> >
> > >
> >
> >
> >
> > >
> >
> >
> >
> > >
> >
> >
> >
> > > --- In Honda-C70@yahoogroups.com, mccajax@ wrote:
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > > Hi All-
> >
> >
> >
> > > >
> >
> >
> >
> > > > I have a 1983 w/120 cc Lifan engine, top out at 50 easy! need to change the carb, air cleaner, adjust the exhaust as well, but it is FAST!
> >
> >
> >
> > > >
> >
> >
> >
> > > > Michael
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > > -----Original Message-----
> >
> >
> >
> > > > From: Bill Sandifer <wordzenpix@>
> >
> >
> >
> > > > To: Honda-C70 <Honda-C70@yahoogroups.com>
> >
> >
> >
> > > > Sent: Mon, Apr 18, 2011 5:19 pm
> >
> >
> >
> > > > Subject: Re: [Honda-C70] Can I do something to increase speed??
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > > If you're looking for 55 mph, look elsewhere. The C70 is a wonderful
> >
> >
> >
> > > > orkhorse and a great slow touring machine. If 55 or so is what you need,
> >
> >
> >
> > > > ook at some of the 150cc scooters (beware ad hype) or better yet, look for
> >
> >
> >
> > > > ome of the really nice 250cc motorcycles, the Honda Rebel, Nighthawk,
> >
> >
> >
> > > > amaha Virago 250, Suzuki GZ250, etc. for those speeds. I'm really fond of
> >
> >
> >
> > > > y little '81 C70, but I wouldn't be caught dead (or probably I would) at 55
> >
> >
> >
> > > > ph on her. If it's any comfort, mine tops out at about 35, but I've had
> >
> >
> >
> > > > ontinuing carb problems. Seems the most reasonable top end I've seen from
> >
> >
> >
> > > > ears of reading is around 45. Bill
> >
> >
> >
> > > > On Sun, Apr 17, 2011 at 11:55 PM, mnandbeyond <mnandbeyond@> wrote:
> >
> >
> >
> > > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > > I just bought a 1981 C70 and I would like it to go a little faster. Top
> >
> >
> >
> > > > speed now is about 35 mph. I'm not a tiny guy about 215 lbs but I was
> >
> >
> >
> > > > wondering if anyone can get up to highway speeds 55mph or so?
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > > Non-text portions of this message have been removed]
> >
> >
> >
> > > >
> >
> >
> >
> > > > ------------------------------------
> >
> >
> >
> > > > C70 Passport Not Running Right?
> >
> >
> >
> > > > 970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw
> >
> >
> >
> > > > 970-73 C70 Troubleshooting Guide:
> >
> >
> >
> > > > ttp://tinyurl.com/6ebwtw (scroll to sec.7.1 page 101.jpg)
> >
> >
> >
> > > > 980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c
> >
> >
> >
> > > > 980-81 C70 Troubleshooting Guide:
> >
> >
> >
> > > > ttp://tinyurl.com/hu42c (scroll to sec.18-1 page 170.jpg)
> >
> >
> >
> > > > 982-83 C70 Troubleshooting Guide:
> >
> >
> >
> > > > ttp://tinyurl.com/hu42c (scroll to sec. 20-28 page 205.jpg)
> >
> >
> >
> > > > 1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn6
> >
> >
> >
> > > > 982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c
> >
> >
> >
> > > > More resources for C70 Passports and Cubs:
> >
> >
> >
> > > > ttp://www.shlaes.com/Vehicles/Scooter.htm
> >
> >
> >
> > > > ttp://www.velodrome.com/HondaC70/HondaC70.htmlYahoo! Groups Links
> >
> >
> >
> > > > Individual Email | Traditional
> >
> >
> >
> > > > http://docs.yahoo.com/info/terms/
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > >
> >
> >
> >
> > > > [Non-text portions of this message have been removed]
> >
> >
> >
> > > >
> >
> >
> >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
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
More resources for C70 Passports and Cubs:
http://www.shlaes.com/Vehicles/Scooter.htm
http://www.velodrome.com/HondaC70/HondaC70.html
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