modifieddriver
Member
- Jul 13, 2007
- 4
- 0
I'm a new guy here. I did an intro and mentioned what was going on.
I've owned this '80 Yamaha DT100G for at least 20 years. It was running when I first bought it used that long ago. The fuel tank started to leak, so I parked it about 15 years ago.
I was invited to do some trail riding, so I pulled it outa' storage.
I repaired the fuel tank. Soldered numerous pin holes in the tank and cleaned the fuel shut-off valve. I also cleaned the tank inside. So that part should be OK.
I pulled off the carb and gave it an intense cleaning. The throttle valve was stuck and there was a bunch of sludge in the float bowl area and fuel passages.
Got the valve to slide, disassembled the carb, cleaned out all the fuel passages with Gumout, fine wire and compressed air.
The small fuel line hoses were cracked and brittle. I guessed where they were supposed to go.
It'll start and run for a short time and then die. Runs better with the choke valve pulled out.
So, here's what I need help with:
1) A need a spec for the float level setting. I'm sure it was disturbed during the cleaning process.
2) I need to know where the small fuel lines go. There's the main fuel line from the tank (no problem here), and three (3) small lines. One small line goes to the oil pump, but I don't know which fitting on the carb it goes to. Where do the other two (2) go? Maybe they're just vent tubes???
3) What adjustments does the carb have other than the idle speed? I assume the large knob on the carb does that by regulating the closure of the throttle valve. I don't see any other external adjustments.
4) Would the run then shut off be a symptom of an incorrect float level setting?
Any HELP, suggestions and comments are welcome. I tired of kicking this thing!!!!!!!!
I know just enough about this stuff to be dangerous, but I have no access to a Yamaha technical manual. All I have is the original owners manual and it tells ya' nothing about the carb except it's preset and take to a Yamaha dealer for adjustment.
I've owned this '80 Yamaha DT100G for at least 20 years. It was running when I first bought it used that long ago. The fuel tank started to leak, so I parked it about 15 years ago.
I was invited to do some trail riding, so I pulled it outa' storage.
I repaired the fuel tank. Soldered numerous pin holes in the tank and cleaned the fuel shut-off valve. I also cleaned the tank inside. So that part should be OK.
I pulled off the carb and gave it an intense cleaning. The throttle valve was stuck and there was a bunch of sludge in the float bowl area and fuel passages.
Got the valve to slide, disassembled the carb, cleaned out all the fuel passages with Gumout, fine wire and compressed air.
The small fuel line hoses were cracked and brittle. I guessed where they were supposed to go.
It'll start and run for a short time and then die. Runs better with the choke valve pulled out.
So, here's what I need help with:
1) A need a spec for the float level setting. I'm sure it was disturbed during the cleaning process.
2) I need to know where the small fuel lines go. There's the main fuel line from the tank (no problem here), and three (3) small lines. One small line goes to the oil pump, but I don't know which fitting on the carb it goes to. Where do the other two (2) go? Maybe they're just vent tubes???
3) What adjustments does the carb have other than the idle speed? I assume the large knob on the carb does that by regulating the closure of the throttle valve. I don't see any other external adjustments.
4) Would the run then shut off be a symptom of an incorrect float level setting?
Any HELP, suggestions and comments are welcome. I tired of kicking this thing!!!!!!!!
I know just enough about this stuff to be dangerous, but I have no access to a Yamaha technical manual. All I have is the original owners manual and it tells ya' nothing about the carb except it's preset and take to a Yamaha dealer for adjustment.