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Top Speed of a T-80?

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Top Speed of a T-80?

Post  fender on Mon 23 Dec - 12:20

I was at the Reading Toy Run a few weeks back when I met a man who knew someone with a T-80. He said that on a long run the T-80 could do 50mph whereas his Honda C90 was topping out at about 45mph. By the sound of it, the bikes were also loaded up with kit for long-range touring.

What top speeds can people honestly get on their T-80s?

Thanks.

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Re: Top Speed of a T-80?

Post  barker on Mon 23 Dec - 18:34

ive seen over 60 down hill 55 on the flat with the wind

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Re: Top Speed of a T-80?

Post  JohnW on Tue 24 Dec - 9:01

barker wrote:ive seen over 60 down hill 55 on the flat with the wind
Official top speed listed as 93 kph = 58 mph but as Barker says down hill or backwind. 45 mph is an achievable cruising speed with little or no head wind.

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Re: Top Speed of a T-80?

Post  taz80 on Sun 9 Feb - 21:50

mate just got back from the elephant rally in Germany my T80 was doing 45-55 on flat fully loaded for touring no problems

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Re: Top Speed of a T-80?

Post  RuffStuff on Mon 7 Jan - 23:05

The one I've just got does 47 on the speedo, im a bit disappointed.
Any possible causes other than being a sail ?

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Re: Top Speed of a T-80?

Post  Christian 1 on Tue 8 Jan - 6:58

The fastest i "run" with mine,was 50!Km/h... Very Happy
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top speed T80

Post  steve9e on Tue 8 Jan - 10:30

Hi guys,:d\\'-\\':

My T80 cruised nicely 45-50 mph without the twistgrip being nailed on Boxing Day, but as with all small powered bikes wind and road conditions obviously can have a great effect. I was tailed by my pal on a MZ 150 who confirmed my readings.
I have no doubt that I could get the speedo "off the clock" given the right conditions , but what is the point? I have more powerful bikes if i want to go any faster.
I find the T80 relaxing to ride not to race.

cheers Very Happy

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Re: Top Speed of a T-80?

Post  JohnW on Tue 8 Jan - 11:03

45 mph is the maximum comfortable cruising speed, back wind crouching down it is possible to get 55mph maybe a tad more.(official top speed is 93 kmph (58 mph) I have found the speedo on mine extreamly accurate when checked with road side speed indicator signs.
I have an pattern exhaust from https://www.motorcycleproducts.co.uk/exhaust-yamaha-t80-townmate-1983-97-p-166427.html on my T80 and it gives a good performance, nice crisp exhaust note compared with the original Yamaha one, the outlet pipe is bigger.


Last edited by JohnW on Tue 8 Jan - 11:12; edited 1 time in total

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Re: Top Speed of a T-80?

Post  JohnW on Tue 8 Jan - 11:09

RuffStuff wrote:The one I've just got does 47 on the speedo,  im a bit disappointed.
Any possible causes other than being a sail ?

Your weight may be a factor, also the exhaust system, the T50 exhaust had a restriction maybe someone has fitted one in error. Other than that make sure tappets are set to correct clearances and the air filter is clean. You would need to adopt a racing crouch to get over 55 mph on the flat unless there is a following gale force wind or riding downhill.
I would think you bike is performing OK

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Re: Top Speed of a T-80?

Post  RuffStuff on Tue 8 Jan - 11:27

It's absolutely flat out, the exhaust is definitely a replacement one, I'll have to Google the numbers/make on it when I swop the shocks out.
I've just got a sheet of filter foam so that'll get done too.

I expected maybe a bit over 50, cruising at 45 but I'm ringing it's neck so obviously something isn't right.
Cheers for the pointers

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Re: Top Speed of a T-80?

Post  JohnW on Tue 8 Jan - 12:44

RuffStuff wrote:It's absolutely flat out, the exhaust is definitely a replacement one, I'll have to Google the numbers/make on it when I swop the shocks out.
I've just got a sheet of filter foam so that'll get done too.

I expected maybe a bit over 50, cruising at 45 but I'm ringing it's neck so obviously something isn't right.
Cheers for the pointers

45 mph is about the maximum comfortable cruising speed without ringing its neck, in strong head wind you will be lucky to get 35! Its only an 80cc commuter after all, but still has a better performance than some of the old British 125 and 150 machines (BSA Bantam, James, Francis Barnet etc)
Your exhaust is an older pattern one, looks like it will need replacing soon as going rusty. I have fitted one from this company https://www.motorcycleproducts.co.uk/exhaust-yamaha-t80-townmate-1983-97-p-166427.html
reasonable price and quality and bike performs well.

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top speed T80

Post  steve9e on Tue 8 Jan - 14:15

Hi Ruffstuff, :d\\'-\\':

JW is right , what do you expect from what is a " large moped" it will never be a Fireblade.
I also run a 1958 Excelsior with a 197 Villiers engine for long distance classic events which runs very sweet for such an engine, however the T80 compares very well with it on small country roads, I am happy and the T80 exhaust sounds great.
You also have to remember that the front suspension on the T80 is pretty basic so watch out if you hit an pothole whilst you have your knee down???? Shocked

cheers Embarassed

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Re: Top Speed of a T-80?

Post  RuffStuff on Tue 8 Jan - 15:22

Yeah it's only a tiddler, just it sounds like it'll explode when it's seeing 45 so there's defo something amiss, especially when everyone's had 55 out if there's.

The pipes mostly surface rust tbh, it's just far too cold to be outside atm, hopefully tomorrows warmer. I just got shocks from the same place.

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Re: Top Speed of a T-80?

Post  JohnW on Tue 8 Jan - 17:32

RuffStuff wrote:Yeah it's only a tiddler,  just it sounds like it'll explode when it's seeing 45 so there's defo something amiss

Not necessarily, I find 40 is the best cruising speed, 45 is nearer flat out in normal sitting position. I do have a windscreen on mine but found it made little difference to speed after fitting it, in fact I think it goes faster. Maybe that the screen gives a smoother air flow that a less aerodynamic riding jacket. As Steve says ideal for riding the country lanes, and I find that on longer journeys the time taken is not much more than my 250 Greeves which has only a comfortable cruising speed of a genuine 50 mph (not 60 as per speedo)

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Re: Top Speed of a T-80?

Post  Duckrider on Sat 12 Jan - 14:53

I own a T72 Very Happy

How? I change the cylinder/piston with one of the T80 model and keep the same cylinder head ,crankshaft and rod.

I keep the old three speed transmission and drive shaft so now in have a dragster small moto.

The speedo has readings of 0-60 km and with only me on it i can see easily the speedo needle to pass the 60 km mark.

But at speeds over 50 km the brakes are not enough, nor the suspensions inspire confidence.

Αlso these speeds are forbidden during the night, as the front lights are not sufficient.
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Re: Top Speed of a T-80?

Post  JohnW on Sun 13 Jan - 10:56

Duckrider wrote:I own a T72 Very Happy

How? I change the cylinder/piston with one of the T80 model and keep the same cylinder head ,crankshaft and rod.

I keep the old three speed transmission and drive shaft  so now in have a dragster small moto.

The speedo  has readings of 0-60 km and with only me on it i can see easily the speedo needle to pass the 60 km mark.

But at speeds over 50 km the brakes are not enough, nor the suspensions inspire confidence.

Αlso these speeds are forbidden during the night, as the front lights are not sufficient.

60 kph is only 37 mph! you need to change the gears in final dive for the higher ratio T80. as you bike is still geared for a T50 so engine is over reving! The brakes are the same on T50 and T80 and are fine for up to 55 mph. Looks like yours need new shoes.

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Re: Top Speed of a T-80?

Post  Duckrider on Sun 13 Jan - 17:19

JohnW wrote:

60 kph is only 37 mph! you need to change the gears in final dive for the higher ratio T80. as you bike is still geared for a T50 so engine is over reving! The brakes are the same on T50 and T80 and are fine for up to 55 mph. Looks like yours need new shoes.

Yes , that's my speed ... 60 km/h :d\\'-\\':

But i don't feel secure with this motorcycle.
Μy other moto is a CBF600SA8 , and when I drive the T 72 I feel insecure.

I drive the T72 exclusively in the center of the city so I do not need much speed, I want to have security and flexibility, as the CBF don't like the traffic in the city especially in the summer with 35+ degrees Celsius and due to weight and volume.

Also because a large percentage i drive with passenger, the short gear gives me acceleration and better control with the throttle.

Τhe brakes are new and very well maintained and adjusted as they are important for our safety.

But I think as much as I like these old motos, I will never get used to this particular front suspension.
And if I did not want to keep the T72 genuine as it would be I would have changed the front fork with a modern one and would have fitted front disc brakes.
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Re: Top Speed of a T-80?

Post  JohnW on Sun 13 Jan - 17:43

Well I cant understand that, I find the T80 well up to modern riding with brakes and handling well up to its performance. I have ridden motorcycles and scooters of all types since 1960 and at 76 years of age I still ride. I find the T80 a super little bike for its size and its a pity they dont still make new ones.

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Re: Top Speed of a T-80?

Post  RuffStuff on Sun 13 Jan - 17:51

My new brake is terrible, I'm actually glad my bikes dog slow it's that rubbish.
I almost saw 50 on the clock today, changed the manky air filter and barely got over 35 on the way home. I'm not sure if the foams too restrictive or if it was just the monster headwind. The saga continues, on a good note the frame is solid under the leg shields.

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Re: Top Speed of a T-80?

Post  RuffStuff on Sun 13 Jan - 17:52

JohnW wrote:Well I cant understand that, I find the T80 well up to modern riding with brakes and handling well up to its performance. I have ridden motorcycles and scooters of all types since 1960 and at 76 years of age I still ride. I find the T80 a super little bike for its size and its a pity they dont still make new ones.
I think it's still made for the Japan market as the 3 speed single seat model

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Re: Top Speed of a T-80?

Post  JohnW on Sun 13 Jan - 18:25

RuffStuff wrote:
JohnW wrote:Well I cant understand that, I find the T80 well up to modern riding with brakes and handling well up to its performance. I have ridden motorcycles and scooters of all types since 1960 and at 76 years of age I still ride. I find the T80 a super little bike for its size and its a pity they dont still make new ones.
I think it's still made for the Japan market as the 3 speed single seat model

No I dont think they are still being made, the single seat ones that are coming over here are 1992 manufactured ones. Low mileage and probably been in store.

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Re: Top Speed of a T-80?

Post  RuffStuff on Sun 13 Jan - 19:29

I was thinking of the 90s, 2006 is latest info I can find on that model.

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Re: Top Speed of a T-80?

Post  Duckrider on Mon 14 Jan - 15:04

I think the T80 is a reliable motorbike of its time.
However, in many areas it is now overcome, in order to understand the difference we can drive a Honda Innova 125i and will immediately understand the difference, .



As i can see here : https://en.impex-jp.com/catalogs/moto/yamaha/t80.html

Parts list for T80 is from 1983 to 1993 almost 10 years.

(Αt this site I found lots of spare parts that in many others did not exist or the information was that their production was stopped.)

But if we were nearer to Japan we could order a container with them in it :d\\'-\\': Very Happy Very Happy



http://www.usedjapanesebikes.com/stock-description.php?ID=1348828405
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Re: Top Speed of a T-80?

Post  JohnW on Mon 14 Jan - 16:54


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