Top posting users this month
JohnW
 
RuffStuff
 
barker
 
steve9e
 
Duckrider
 
Christian 1
 
sardonyx19
 
eca05rjc
 

Top posting users this week
JohnW
 
Duckrider
 
barker
 
RuffStuff
 
sardonyx19
 
Christian 1
 

Who is online?
In total there is 1 user online :: 0 Registered, 0 Hidden and 1 Guest

None

[ View the whole list ]


Most users ever online was 29 on Mon 29 May - 18:54
Latest topics
» SPEEDOMETER lighting
Today at 18:00 by Duckrider

» prah birthday
Today at 17:53 by Duckrider

» New owner, Southport
Today at 10:19 by barker

» New Member
Today at 6:47 by Christian 1

» Honda or lifan motor ?
Yesterday at 15:20 by Duckrider

» Townmate front panel
Yesterday at 15:15 by Duckrider

» Only revving with choke on
Wed 16 Jan - 14:26 by barker

» Top Speed of a T-80?
Mon 14 Jan - 16:54 by JohnW

» T80 Windshield
Sun 13 Jan - 17:36 by Duckrider


leaks petrol

Go down

leaks petrol

Post  barker on Fri 25 Mar - 22:08

if I leave my t80 in the garage for a week there is a strong smell of petrol plus some times the tank is empty ive changed thee carb but no difference, do you think its the carb or thetap or what

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Fri 25 Mar - 22:12


barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Fri 25 Mar - 22:16

I was wondering could it be anything to do with ethanol in the modern petrol,, have any one else had any problems

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  JohnW on Sat 26 Mar - 9:27

barker wrote:if I leave my t80 in the garage for a week  there is a strong smell of petrol  plus some times the tank is empty ive changed thee carb but no difference, do you think its the carb or thetap or what

Its the tap, is it in the prime position? as this lets the petrol flow to carb when engine not running. If not its the diaphragm in the tap split, again letting fuel flow. You cannot get new diaphragm kit so will need a new tap.

JohnW

Posts : 1220
Join date : 2011-10-29

View user profile

Back to top Go down

Re: leaks petrol

Post  alibx11 on Sat 26 Mar - 9:45

A sensible solution would be to put a clean bit of cardboard under the bike, if it's under cover and not outside) to see where the petrol leak is coming from.
If it's the carb it's probably coming from the overflow so check the float level, if it's the tap then a replacement is in order, could also be a dozed fuel line coming from the tank.

alibx11

Posts : 18
Join date : 2015-12-01
Location : Bangor, N. Ireland

View user profile

Back to top Go down

Re: leaks petrol

Post  JohnW on Sat 26 Mar - 18:05

alibx11 wrote:A sensible solution would be to put a clean bit of cardboard under the bike, if it's under cover and not outside) to see where the petrol leak is coming from.
If it's the carb it's probably coming from the overflow so check the float level, if it's the tap then a replacement is in order, could also be a dozed fuel line coming from the tank.

If its the diaphragm in the tap it will just let petrol flow to carb, in an ideal situation the carb should not flood, but it only needs the float needle to not fully seat & over a period the carb will flood via the overflow tube. If the tap is shutting off correctly this wont happen. My money is still on the tap.

JohnW

Posts : 1220
Join date : 2011-10-29

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Sat 26 Mar - 22:38

I have some spare taps give it a go next week

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Sun 27 Mar - 18:27

so as I ve got it right what is the prime position up or down the lever bit I mean

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

amendment tap positions

Post  JohnW on Sun 27 Mar - 22:14

barker wrote:so as I ve got it right what is the prime position up or down the lever bit I mean

Normal running Straight down. Prime Horizontal. You asked the same question before in 2012 http://yamahatownmatet80.forumotion.co.uk/t145-petrol-tap?highlight=Petrol+tap
When tap is in normal (straight down position) no petrol should flow until engine is started, the vaccum from induction opens the tap.

Is that a left hand drive T80 you have pic'd?  Surprised  Surprised


Last edited by JohnW on Mon 28 Mar - 14:46; edited 2 times in total

JohnW

Posts : 1220
Join date : 2011-10-29

View user profile

Back to top Go down

Re: leaks petrol

Post  alibx11 on Mon 28 Mar - 10:49

The prime position is straight across, having the tap vertical is the vacuum operated function.

LOL... "is that a lhd townmate?", nice spot John.

alibx11

Posts : 18
Join date : 2015-12-01
Location : Bangor, N. Ireland

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Mon 28 Mar - 22:01

just wanted to be sure,2012 you have a good memory , once ive mended the fence that storm Katie destroyed I will get on with the t80

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  JohnW on Tue 29 Mar - 22:30

barker wrote:2012 you have a good memory

not really, just searched for petrol tap

JohnW

Posts : 1220
Join date : 2011-10-29

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Sun 10 Apr - 14:35

finally got round to looking at the t80 took the pipe off at the tap end that goes to the carb , and as some of you said tap leaked, so changed it now no petrol leaks

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Mon 11 Apr - 19:58

bloody thing wont start now so changed the plug , good spark but no petrol reaching the piston so changed the carb , what a pig of a job getting the air filter pipe back on to the carb, tried heating it in water no joy in the end I split the carb end ,put it on carb wrapped gaffer tape around it then fitted a jubilee clip, gave up to night on it as the light was fading, continue tomorrow

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  JohnW on Tue 12 Apr - 9:03

barker wrote:bloody thing wont start now so changed the plug , good spark  but no petrol reaching the piston so changed the carb , what a pig of a job getting the air filter pipe back on to the carb, tried heating it in water no joy in the end I split the carb end ,put it on carb wrapped gaffer tape around it then fitted a jubilee clip, gave up to night on it as the light was fading, continue tomorrow  

As it was going ok prior to changing the tap, then it must be that the replacement tap is faulty, diaphragm in tap punctured maybe so that the vacuum is not created to open the tap. Did you try it in the prime position to see if petrol flowed then? Trouble is that the taps deteriorate by standing & diaphragms harden & split, the only real solution is to buy a new tap but they are expensive at £27.35 from A J Sutton https://www.yamahamotorcyclespares.co.uk/product/yamaha/35T245000000/fuel%20cock%20assembly%20t80%20townmate,%20t50%201986?uid=0
Always pays to sort these problems starting from the cause of the original problem, a neighbor of mine spent over £100 on having the voltage control box converted to electronics after his charging light failed to go out on his MG Midget. In the end it was a sticking brush in the dynamo which cost nothing to fix, just a bit of WD40.  He should have checked the dynamo first.

JohnW

Posts : 1220
Join date : 2011-10-29

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Fri 15 Apr - 16:56

my new tap has arrived, if I connect thetap up to the tank and turn it to prime petrol will run through , if I turn it to vacuum no petrol will run run through is tis right,

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  barker on Fri 29 Apr - 16:06

had a lot of bother with my delivery from suttons they had no record of my order even tho I was charged for it turns out it was pay pals fault

barker

Posts : 499
Join date : 2011-03-24
Location : littlehampton

View user profile

Back to top Go down

Re: leaks petrol

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum