25th Apr 2008, 18:28

Hi, I have really enjoyed reading all of your comments. I'm going to look at a 1981 C70 tomorrow. The picture looks good, the guy said it has a small oil leak, a drop drip maybe he said, but hasn't been able to figure out how to stop it. Hopefully my brother or neighbor might have better luck. That is if I get it (probably will). I'm more excited now after reading all the comments. I will let you know how it goes!

28th Apr 2008, 14:20

I owned a Passport from 87-96, and I would really love to have one of these again. I went to look at one recently that was advertised as "showroom condition". It wasn't. He wanted $1800. The Blue Book is $750. I really would like to get one but I don't want to overpay. Any suggestions? Is it easy to find one of these, or are they getting harder to find?

4th May 2008, 20:23

Hi everyone, I am from Indonesia. The C70 has been around for many years. I used it during 50 at University, my sister as well.

In Indonesia, this bike is a family vehicle! A family of four with groceries. Now, I just got one 1982 Passport that I purchased it for 1,900 Canadian. It runs like a charm. First kick start amazing, as well as push button! Greatest bike ever!!

Cheers. erhanchan@yahoo.ca

20th May 2008, 23:00

Yeah, I am going out and buying a 1982 Passport in a few days. It's a bit of a junker, and I'm assuming it will take a lot of work and a little money to fix, but I'm getting it for 175$. I'm really looking forward to getting this project bike, I'm sure it'll be a lot of fun to work on, and even more fun to ride.

28th May 2008, 22:45

It's great to see so much interest in a fun scooter. I have a 81' C70. For the last four years it has been a joy to ride. I was thinking of selling it, but not after reading the comments here. Safe riding.

3rd Jun 2008, 18:01

Looking for an original C70 1982 Passport key, want to give my Passport to grandson for birthday and have lost the key... does the same key fit all Passports in the same year?

Thanks pfbarner@frontiernet.net

19th Jun 2008, 09:29

Just picked up my "banana bomber" 1981 passport for 410 dollars... shifts great, does 45 cruising, and is a blast to ride... last night however, I think my sprocket came loose and is rubbing on the chain guard... will have to take apart this weekend... Do I need to mix oil in the gas?

23rd Jun 2008, 13:59

WTB: Hi all, hope things are well.

New to the site! Just picked up a 1982 C70 Passport. The only thing that's keeping me from riding is a "Front Fork top Bridge". It's the cup with wings that holds all the wiring. I ordered NOS from Bangkok, it got here 3 weeks later and was too small.

Any help would be appreciated.

E-mail me at itssoperverted@gmail.com


29th Jun 2008, 01:54

The Passport is a 4 stroke engine, so no oil mixture is needed.

I have one of these little scooters that I got from a friend for free. How exactly is this intake system with a funnel and a lawnmower air filter achieved?

These scooters are amazing; at 6'4" 230 lbs I am able to go 40 MPH on a flat road. I can't wait to try downhill, although it may be scary.

2nd Jul 2008, 09:13

I have a 1982 Honda passport bike 70. Does anyone know how to adjust the carburetor adjustment, since we cleaned the carburetor, and it doesn't want to start or idle very well. Any help would be appreciated.

14th Jul 2008, 02:11

I have to disagree with some things I've read here.

Premium gas? These bikes were designed and produced for use in places like Cambodia and Indonesia and Africa and stuff. Do you really think they use premium gas over there?

The auto clutch makes shifting tricky? I think the purpose of the auto clutch is to eliminate tricky.

And all the talk of lifting front ends at 40 mph or going 90 mph on these bikes... If you are lifting the front end at any speed, you are doing something wrong and abusing the drive train big time.

I was surprised it took so long for somebody to point out the reality of doing 90 mph on one of these type bikes with a 3 or 4 speed transmission and presumably stock sprockets. Like was said, you are talking AT LEAST 12,000 rpm's, probably 15,000. If that is even possible with zero load connected to the engine, it would beat the heck out of the bearings and everything else, due to the crank and other parts not being balanced even remotely well enough for such rotational speeds.

I lived in Japan for a few years, and drove both 50cc and 90cc Super Cubs there. The older 90cc I had was great, it would easily keep up with normal highway traffic. But in Japan that means 60 kph, or about 40 mph. Going down a slight incline through a long straight tunnel, I used to get it up to 70 kph fairly quick, then creep up to 80 kph. So I'd call 55 mph about tops for that bike, and bordering on abuse even then. And they say those early 89cc 90's had noticeably more power than the current 86cc 90's. Surely more than a 70cc.

I just recently bought me an even older 90cc CT200 with the very early push-rod engine. Not going yet, but I love it already. With all the deer, raccoons and ruffed grouse crossing the road where I live, I don't really want to go faster than 45 mph on any bike.

20th Jul 2008, 20:55

I'm going to look at a C70 tomorrow and hopefully buy it! Wish me luck! Thank you for all of your wonderful comments... keeps the enchantment going!

15th Aug 2008, 19:49

C70M comments: If you have an owner’s manual, READ IT!

I bought my first C70M in 1977 for my wife to ride. I had a 1975 CB400F Super Sport, it was a 1973 and it would “easily” do 50+ mph on the flat, but I wanted a little more. What the hell, it was wound up tight, so I changed the front sprocket to one with 1 tooth more to increase top end, it did, to approx. 60, any more might not overcome wind resistance. I can’t remember the exact speed and if I was “laying down” to cut wind resistance.

That’s because in mid July I started up my 1972 C70 for my first ride on any one of them since 1985 or 6. I bought the ‘72 in ‘79 to ride along side of my wife on the C70, because riding the 400 felt like a waste of machinery next to the C70. The 72 had 2200 miles and came with an almost new owner’s manual, and the 73 had 9000 miles and a beat up 1971 manual.

From pix on the web and this 71 manual, it appears the 1970 & 71 are the same, and from looking at my 72 & 73 I see none between them, but I see changes from 71 to 72. The big changes are the gas tank housing and tank size (even though Honda lists the tanks as the same size from the style change it is only 1 gal. total on the 72-3 from bone dry), ignition key location, speedo & odo (9999 miles vs. 99999 miles), vents on the engine side covers that change the fairing, fewer tools in the kit, and the storage compartment size got bigger from 71 to 72, and the seat size goes from dual to large single with a rack.

The manuals show each bike without passenger pegs, even with the long seat (71), my 72 & 73 have pegs. The 71 manual lists in engine specs. 5 HP @ 8500 RPM (that means it is limited access highway legal in some places, I’ve done it and it and it is not recommended). The 72 leaves the HP listing out. I have 3rd party repair manuals that list the HP higher.

Comment on 14th Jun 2006, 07:10

Google “Honda Wave 100” or 125. You might find what you want, but you can get it here.

Comment on 20th Jun 2006, 21:11

Google “50th anniversary Honda C70”

Comment on 10th Jul 2006, 20:59

Keep looking, there are plenty of good ones out there, and they are easy to fix if you know what you are doing; they are simple and straight forward.

Comment on 15th Sept 2006, 16:57

Go for the 1981 C70, old bikes are cool. See 14th Jun 2006.

Comments on 9th Sept 2006, 09:35, 13th Dec 2006, 11:44, 5th Apr 2007, 05:33, 25th Apr 2007, 04:53

What does a C90 look like? Is it a step-thru? What drag strip has the traps at the 4 miles mark?

According to the 1971 owner’s manual and the 1972 manual on the not-numbered pages before page #1, under stopping distance it says it takes 105 feet to stop from a speed off 44.1* mph using a fully operational service brake (it does not specify F or R or both) under “light load” and under max 108.5 feet. “* The maximum speed attainable by accelerating at maximum rate from a standing start for one mile.”

Comment on 26th Apr 2007, 11:35, 29th Jun 2008, 01:54

It's not a scooter. It is a (step-through) motorcycle by definition. Wheels over 15 inches, engine “between” driver’s legs (49/50 cc rule may apply) and pegs (no movable pedals). I get lots of looks and I weigh 185. The HD guys are amused.

Comments on 20th Feb 2007, 17:40, 24th Apr 2007, 09:00

If you know how to drive a manual shift car, this shouldn’t be a problem. If not, of course you have to down shift. The lines on the speedo are there to help you figure out what gear you should be in at a particular speed, then experiment a little. When down shifting you have to bring the engine speed up to match the vehicle speed in the lower gear; you can do this when you shift by holding your foot down, it disengages the gear, then when the speeds are matched, let your foot up slowly.

THESE BIKES DO NOT HAVE A 3 SPEED AUTO TRANS. They have a 3 speed manual with a centrifugal force clutch. Backing off on engine speed if low enough disengages the clutch, which helps to reduce banging while shifting up and especially down when matching speeds.

Comment on 18th Sept 2007, 19:10

Move to a state like RI where titles are not required on old vehicles, and no titles were issued before 1973, but you will need the last owner’s last or next to last registration.

Comment on 27th Sept 2007, 12:25

In the 1971 manual it says use premium gas with an octane rating of 85. Those 2 statements make no sense. In 71 premium was 100+ equal to today’s 93+. Their use of the word premium more than likely means a good brand. But with 8.8:1 compression ratio mine runs just fine on poor gas. Better A/F? My original works just fine, tap the sand out occasionally and change your oil at least once a year, whether it needs it or not. I use Mobil 1 5w30.

Comment on 2nd Oct 2007, 19:19

Keep it stock and find an 80’s model. They should last forever, but, my shop manual isn’t so optimistic, it says the engine should be overhauled every 10,000 miles. My 73 showed no signs of fatigue when it was last ridden.

Comment on 30th Mar 2008, 14:27

71 Manual = Spark Plug NGK C-7 HS 0.024” - 0.028” gap. Points 0.012” - 0.016”. Valve clearance 0.002”.

Comment on 9th Apr 2008, 23:59

These things are cooler because they are so old and should have disappeared by now, not to mention the fun factor. Yeah, all 60,000,000 of them; that includes the 50s, 65s & 70s. Back in the 80’s I kept a book on mileage and I was getting 100 to 125 MPG depending on the type of riding. In 1980 Honda was advertising the Passport with an EPA rating of up to 130 MPG (your mileage will vary).

Comment on 13th Apr 2008, 11:37

Google “Honda Wave 100”

Comment on 3rd Jun 2008, 18:01

My blanks on the 72 & 73 are the same, but they don’t turn the other bike. The key number listed on the cylinder and key are only a few numbers apart in different years, so they may be recycling key combos. http://www.hondakeys.com/

Comment on 19th Jun 2008, 09:29

It’s a 4 stroke – no.

Comment on 2nd Jul 2008, 09:13

You still haven’t cleaned the carb out enough; it takes tiny pins to poke through the small jets. If it is like the 71 thru 73 carb, it is on left side of the carb, has 2 small screws next to each other. The one in the recess is the mixture screw with an initial setting of 1 – 1 ¼ turns out. The other screw is the idle speed screw; it pushes open the throttle piston. Adjust at 1300 RPM with a hot engine after adjusting points, timing and valves (cold). If everything else is OK, it will start before adjusting the screws.