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speeds in the gears

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speeds in the gears

Post  oldsomeman on Sat 29 Aug - 6:21

bearing in mind i an fat man what are the speeds in the gears.....it seems to change up ok but 3rd will need selectiong at arond 25 MPH and then 4th over 30 MPH.
At the moment it wont do much over 30 and 40 on the flat but i put that down to my weight on it Rolling Eyes
My last bike was a burgman 400 and so I am having to get used to lower speeds on this..but its embarrassing when going up a slope you have to change down to maintain 30....or do i need to check all the engine settings because there is something out of adjustment.
It starts ok and runs fine, engine sounds good and healthy, the brakes are not binding and air filter is new........of course the seat might give me monkey butt but whats new Laughing

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Re: speeds in the gears

Post  JohnW on Sun 30 Aug - 20:51

oldsomeman wrote:bearing in mind i an  fat man what are the speeds in the gears.....it seems to change up ok but 3rd will need selectiong at arond 25 MPH and then 4th over 30 MPH.
At the moment it wont do much over 30 and 40 on the flat but i put that down to my weight on it Rolling Eyes
My last bike was a burgman 400 and so I am having to get used to lower speeds on this..but its embarrassing when  going up a slope you have to change down to maintain 30....or do i need to check all the engine settings because  there is something out of adjustment.
It starts ok and runs fine, engine sounds good and healthy, the brakes are not binding and  air filter is new........of course the seat might give me monkey butt but whats new  Laughing

The speeds you have quoted seem on par for a T80 but 40 to 45 on flat with no strong head wind should be achievable, I am just over 14 stone & can get up to these speeds OK, & dont have to change down only only really steep hills. Maybe your engine needs a tune up.

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Re: speeds in the gears

Post  Frank1e on Thu 3 Sep - 21:45

Dear Oldsomeman, I shall share my experience with you . On a recent touring trip two up with my lady wife plus luggage on our super little townmate we achieved a steady 45 mph on the flat with no wind 15-35 mph on hills depending on inclines and 60mph downhill, now to achieve max thrust and keep momentum i have found one must change from 3rd into fourth at 40 mph i know the engine sounds like it will explode but it wont and put the notion out of your mind ! you cannot over rev these machines and this is normal operation . Now these mph figures are with a worn engine ( its using oil and compression is low ) Tho this will all change soon , with my new cylinder and piston ha ha my lady wife will have to hang on to her hat !,
kind regards
Frank

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Re: speeds in the gears

Post  JohnW on Fri 4 Sep - 3:07

Frank1e wrote:Dear Oldsomeman, I shall share my experience with you . On a recent touring trip two up with my lady wife plus luggage on our super little townmate we achieved a steady 45 mph on the flat with no wind 15-35 mph on hills depending on inclines and 60mph downhill, now to achieve max thrust and keep momentum i have found one must change from 3rd into fourth at 40 mph i know the engine sounds like it will explode but it wont and put the notion out of your mind !  you cannot over rev these machines and this is normal operation . Now these mph figures are with a worn engine ( its using oil and compression is low ) Tho this will all change soon , with my new cylinder and piston ha ha my lady wife will have to hang on to her hat !,
kind regards
Frank

I disagree that the engine has to be revved, it will pull well from 20mph in top, it is not necessary to rev it to 40mph in 3rd even 2 up. Just uses more petrol & puts undue stress on engine. Yes I know they are bullet proof but there are limits. Probably why yours is burning oil & has lo compression.

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Re: speeds in the gears

Post  Frank1e on Fri 4 Sep - 7:19

Oldsomeman,
Well i've studied your words and all i can advise is your machine acted like my own after fitting a new air filter , an ebay special probably just a flat piece of furniture foam , i blew an air line into it and very little came out the other side, it strangled the bike..i junked it and cut a new piece from a motocross filter .. big difference like a different bike an iridium plug helped as well.
good luck.

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Re: speeds in the gears

Post  barker on Sat 5 Sep - 2:14

I have 3 town mates one does 60 the other 55 and the last one 45 , this proves to me the speedos are miles out of true

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Re: speeds in the gears

Post  Frank1e on Sat 5 Sep - 2:45

barker wrote:I have 3 town mates one does 60 the other 55 and the last one 45 , this proves to me the speedos are miles out of true

Barker, Thats a good point ! I've heard that before from two differing sources as well .. the speedos tend to record a slower mph reading...hmm yes.

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Re: speeds in the gears

Post  JohnW on Sat 5 Sep - 19:06

Frank1e wrote:
barker wrote:I have 3 town mates one does 60 the other 55 and the last one 45 , this proves to me the speedos are miles out of true

Barker, Thats a good point ! I've heard that before from two differing sources as well .. the speedos tend to record a slower mph reading...hmm yes.

In my experience I have found speedos to be dead accurate when checked going through the flashing speed signs,
One thing that can effect top speed (other than engine condition) is the final drive bevel gear. The ones on the T50 are lower ratio so if a T50 one is fitted in a T80 it will be lower geared, hence lower top speed.
The bevel drive ratios are: ratios are T50 3.589 : 1 & T80 3.166 : 1


Last edited by JohnW on Sat 5 Sep - 19:11; edited 1 time in total (Reason for editing : Gear ratios added)

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Re: speeds in the gears

Post  oldsomeman on Tue 15 Sep - 7:21

thanks for your comments folks.I will have a look as soon as i have time. :d\\'-\\':

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