1986 Yamaha TT225

 

I recently bought an 86 Yamaha TT225.  Great little thumper and the kid I
bought it from was mechanically inclined to take care of basic services on
the vehicle.

He admitted to me when he bought it from the primary owner, that it ran
fairly well despite it sitting in a barn for the last 5 or 6 years.  Cleaned
the carb, placed new gas, drained the oil and put in new oil, and a fresh
plug.  Choke pulled out.  Still the stubborn beast doesn't want to start.

Now before the flames get too hot I am aware of the difficulties surrounding
starting up a dirt thumper.  This TT225 even has a decompression lever and
it works.  Still no guts.  After about 20 mins of leg cramping I might get a
sputter, but nothing to write home about.

The kid indicated that the jets might just need to be cleaned, but I said
unless I see some indication of life in the bike that I would walk away and
we'd both be unhappy.  Popped the air box and sprayed a little starting
fluid and she fired on up....but it was short lived.

I have some ideas, but wanted to talk to the experts in the forum before I
didn't some level of damage that could not be undone...lol.

A side question of the same topic is - even if cleaning the jets doesn't
give the desired effects (i.e. gasoline soak and compressed air) what else
could it be?

Thanks much!

Mark

 

Try posting over at RMD (I'll cross post for you) and you will get all the
advise you need.

Tom

 


SoCalTom wrote:

If you've not pulled the jets from the carb to clean 'em, then your
carb cleaning has not gone far enough. Usually you have to pull the
pilot jet, pull the main jet, and if it screws out as well the brass
thing the main jet screws into.
Pulling the idle air/fuel screw (probably its a fuel screw) is
warranted as well.

A bike that's sat may also have fuel flow problems- check for fuel at
the carb by lossening/removing the carb bowl drain screw (almost all
dirt bike carbs have 'em).

A dirt-bike thumper in good tune should start easily, no matter the
size. A 225 should light right up.

DDave

 



and that little 250 has lots of guts and gears. they are a
blast to ride.

 



clean the carb completely! it's the only problem and only
sure fix. i have expirience with many yama 250-500-600 xt's.
just take it apart and clean it.
do it carefully, do not use wires in the passages.
a kit for rubber/plastic parts would help.
the starting fluid was proof of what you need.
now go and report back when it runs as it should and will
after your work...
-e