Question about 2003 Sachs Roadster 125 V2

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Electrical problem Bike does not want to run, i checked the carb and fuel line. i did have it ticking over at one point but as soon as i tried to aply more power it starts to die. Now it doesn't want to start, i found that there maybe an electrical problen eg. a broken wire etc... i need help please

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Clean the carbs. Then move the jet needle clips down one notch. This should solve the dieing problem. Chances are the engine is flooding due to twisting the throttle too much. Try it with only one twist then no additional throttle. Install a fresh set of spark plugs.

Posted on Jul 26, 2009

  • tombones Jul 26, 2009

    Meant to add an image.



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2 Answers

1991 Yamaha TDM 850 Fuel running out of carbs when bike is running?

Hi did you fix this problem as i have the same trouble fitted a carb kit still the same so got a new set (second hand) as mine had a broken choke and tick over screw still over flows when running, can anyone tell me or confirm were the two fuel lines go top and bottom fuel line is the top one the vacume pipe?? mine is a 1992 tdm

Jul 22, 2012 | 1999 Yamaha TDM 850

1 Answer

Bike ticks over on choke but won't run if a touch

Hi, Gerard and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below. Good luck and have a nice day.
Yamaha XV535 runs only on idle choke
Yamaha XV 535 DX Virago Service Manual
OEM parts for Yamaha

Btw, I’m available to help over the phone in case u need at

Oct 08, 2011 | 1994 Yamaha XV 535 Virago DX

1 Answer

Ran fine the other day, today i try starting it and itt turns over but then puts out, the accelerator hardly affects the running of the bike, i have to constantly twist the accelerator to keep bike...

You've either got some kind of contaminate in the float bowl or the jets are stopped up on your bike. If it runs as long as you keep twisting the throttle, it's run off the fuel from the accelerator pump. No fuel is getting through the jets. I'd take the fuel line loose and check the fuel flow. If your bike was made after 1996, you'll need a vacuum source to check the petcock as it is vacuum operated. I'd take the carb off and have it gone through as well. Check the vacuum hose that runs from the rear of the carb over to the VOES and the backside of the fuel petcock.
Good Luck

Feb 19, 2011 | Harley Davidson XL Sportster 883...

1 Answer

Actuaaly lemans 11 but problemis: bike starts first turn runs sweet and will tick over fine. Will tick over 5 or 6 times on either cylinder. Ride the bike for a few kilometers and it starts to feel a bit...

Has the bike been standing along time? if so its probably the pilot fuel tunnel in the carb blocked. replace the pilot jets and main jets and soak the the carbs in a good carb cleaner.

Feb 18, 2011 | 1985 Moto Guzzi Le mans III

1 Answer

2001 yamaha v sta 650 ran out of gas. And wont start back


I know that quite a few of the V-Star's have an issue with fuel that has Ethanol additives. What happens when the bike sits, even for as little as two weeks, the fuel start to "gunk" up in the carbs. If you had any trash in your tank, you could of clogged the fuel filter.

Something you can try, without a lot of diagnostic testing, is to add SeaFoam to the gas tank. Use the recommend amount of SeaFoam for the amount of gas it takes to fill it up (I believe it's about 4 gallons or a bit more). Also add 1/4 ounce of carb cleaner (B-12 works great).

Before doing any of the above, I recommend that you check the fuel filter, fuel lines, fuel on/off valve and remove the carb bowls to check for any trash or gunk.

Now you can try starting it again, but put a trickle charger on the battery to help keep the battery up while starting. Start out with the Choke at full and try to start it for a few minutes. If it starts, let it idle for 10 - 15 minutes to allow the additives time to run through and clean the fuel system. Make sure not to run the battery completely down.

If it still won't start, pull a fuel line off a carb and try to start it. If you are getting fuel through the line, it's, more than likely, not the fuel system and could be electrical. Although I've never heard of an electrical issue when running any bike out of gas.

One other thing... try starting it with the fuel on/off valve in the RES (Reserve) position.

This may sound silly, but check the Run Switch to make sure that it didn't get knocked out of place - even slightly.

I've been racking my brain since your question appeared over 3 hours ago. I hope the information that I have given you, will give you enough of a starting point that you can figure out the problem.

If you find this information useful, please vote. Thank you.



NOTE: I have done this, but I do NOT recommend it. Do this at your own risk. Get a spray can of starting fluid, find your air cleaner and give it a quick shot. Back away from your bike and try starting it. It will either start, or pop and backfire. If it didn't start, try one more quick shot, again backing away from the bike while trying to start it. Once the bike starts, and you have added the above chemicals, you shouldn't have any trouble starting your bike again. One more thing, if you use low octane fuel it will have Ethanol in it... use the SeaFoam every other full tank. Only use the B-12 once. If your bike is going to sit for an extended period of time, get a bottle of Sta-bil and add the recommended amount to the gas tank. Run it for a bit, shut it off, and shut off the fuel valve.

Jan 10, 2011 | Yamaha XJ 650 Motorcycles

2 Answers

Engine stall on throttle up

It obviously sounds like its being starved for fuel, you said that you replaced the pump and the filter, what about the carbs ? has anyone checked them out ?

If the bike has been sitting over the winter and the carbs were not drained or if the fuel wasn't stablized then you might have some dirty carbs, you can try draining the float bowls and then adding fresh fuel see if that helps, if not you'll likely have to pull your carbs and clean then. Todays fuel doesn't las that long before it goes bad.

May 02, 2010 | 1990 kawasaki ZZR 1100

1 Answer

Suzuki GSF400 Bandit problems with tick over.

as you have replaced carbs you will need to retune for fuel intake also check its getting enough air ie.. air filter has been changed or is clogged

Jun 16, 2009 | 1992 Suzuki GSF 400 Bandit

1 Answer

Gilera sp50 cuts out at speed, or while eccelerating

hi the bike has a vac fuel valve on the bottom of the tank or along the fuel line ther is two pipes one is vac one is fuel u need to draw a vac and see if fuel coms from the valve if this ok you need to clean the carb out make sure thers no dirt or water in the bottom of the carb

Jun 15, 2009 | 2005 Gilera Runner VX 125

2 Answers

Still got problems with sr125

i would replace your cable and you need to check your valve clearance.

Nov 17, 2008 | 2001 Yamaha SR 125

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