How to fix a Suzuki TS 125?

Question

have a 1980 Suzuki TS 125 with a Mikuni VM type 'round' carburetor.

It did not start this spring, so I took the carb out and apart, and

cleaned it complete (never been done).

The bike now starts (after lots of trying, ultimately tow starting it

by pulling it with a car).

But in only takes 1/4 throttle, than chokes and would die if not

closing the throttle immidiately.

I had tightened all interal screws, and no start to think that there

may be a mix s***w inside that adjust the air/fuel mix.

a) can someone please let me know if that is the case?

b) what s***w it is?

c) how to set it to get the bike going again

Answer 1

A clogged pilot jet in the carb is the most common problem.

The opening for the pilot jet is as small as a pin and is easily clogged with bad gas.

Remove the pilot jet and hold it up to the light - you should be able to see through it.

Clean it until you can.

Inside of the float bowl, the main jet is in the center, the pilot jet is to the side of it.

Answer 2

sounds more like there is still trash in one of the jets or passages.  did you remove all jets and thoroughly clean those too?  needle jet, pilot jet and main jet.

these had very simple carbs on them and not much other than clogged passages to mess with.  I don't even recall there being an air s***w, could merely raise or lower needle for adjusting.

http://www.powersportspro.com/pages/part...

did you also drain the gas tank, flush the tank, remove and flush the petcock screen?

also clean the air filter, put in a fresh spark plug along with fresh gas / oil (unless the oil pump is still intact)...

very simple design.

Answer 3

well it could be a main pin and gas pin mix up coz they both look almost similar,take the carb apart again and check that all is in place..since its a two-stroke bike i advice ya to check on the spark-plug and the fuel pipe lines...