Jump to content

Ty 175 Won't Stay Running


mik60ish
 Share

Recommended Posts

I bought a 1974 TY 175 about a month ago it had no spark, I have fitted electronic ignition.
So the only way I get it to run is to remove plug and pour some premix in and it will run very smokey until its burnt the petrol I've poured in then stop.
Does that mean its crank seals have gone and need replacing ?

Link to comment
Share on other sites

 

Maybe the crank seals you need to check everything, air cleaner, exhaust, different spark plug.

On the TY175 carb an o ring is fitted around the main jet this goes into the float bowl, pull off the carb float bowl you will see what I mean, replace the o ring with one that is a good fit it clean the carb out. Good luck please let us know what you find.

  • Like 1
Link to comment
Share on other sites

 

My advice is - strip carb and have all parts ultrasonically cleaned, replace o rings with new, check float height = 21mm, reassemble, mixture screw setting 2.5 to 2.75 turns out.

Remove petrol tap from tank and clean, wash tank out with fresh fuel, reassemble, fit inline fuel filter.

If you use carb cleaner instead of ultra sonic, remove all o rings first, they don't like it.

Link to comment
Share on other sites

 

I bought a 1974 TY 175 about a month ago it had no spark, I have fitted electronic ignition.

So the only way I get it to run is to remove plug and pour some premix in and it will run very smokey until its burnt the petrol I've poured in then stop.

Does that mean its crank seals have gone and need replacing ?

From no start to questioning your crank seals is a big jump.

I would clean the carb about a dozen times and make sure the reed valves are perfect before diving deeper into the engine.

While the carb is off, hold your hand over the intake manifold, turn the engine over slow and see if you have any intake vacuum.

Make sure your oil injection lines are all good or properly obsoleted.

If your intake vacuum pressure is low, it could just as easily be gummed up and stuck piston rings.

Edited by eota
Link to comment
Share on other sites

 
 

Sounds like a fuel supply problem.

Start your investigation with the cheap and easy options -

Is petrol flowing from the tank?

Is the petrol in the tank fresh?

Is petrol reaching the carb?

Is there petrol in the float bowl?

Take the air filter out (only briefly for the test) to see if it then runs.

Link to comment
Share on other sites

 

Thanks for all replies I have cleaned carb again put fresh petrol in and it runs OK still very smokey. Will have to put a chain and sprockets and see how it pulls as I have another 175 that I can change bits to try.

Going to try and make one good bike from two and try and alter frame etc as I also have spare frame. So its not going to be a 5 minute job.

Link to comment
Share on other sites

 
 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...