Question about Derbi Motorcycles
Hi- I have a 2003 Derbi Red Bullet. It sat for a while (years) in my uncles garage (with gas in it). I drained the gas, replaced the spark plug and battery and got it to run for a few days. Weeks later, I tried to start it and it won't start. It tries to trun over but it will not "catch". Thoughts? Also- right over the spark plug there appears to be a disconnected house, is it supposed to be that way? Thanks!
Hi, Marshal if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will not idle unless the choke is full on and run poorly then stall, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition and in the future pour in a bottle of fuel stabilizer and injector cleaner for you FI folks at least 2 times a year and before storage.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
3. After charging the battery remove the leads and let it sit for a couple of hours then check the battery voltage with a voltmeter, you should have 12.5 volts or more, any readings in the 11 volt range you need to do a proper "LOAD" test on the battery and replace as necessary, you may have 12.5 volts or better but little or zero amps, any readings in the 10 volt range you have a dead cell and the battery needs to be replaced.
4. Drain and flush fuel tank if it rusty there is a cheap and easy fix. https://www.youtube.com/watch?v=fUYr_7SwGms
5. Remove and inspect your air cleaner paper elements that are not oil soaked can be cleaned with a soft brush and low pressure compressed air, oil-soaked elements must be replaced. Gause mesh and foam elements can be cleaned by soaking them in a container big enough to completely cover them with a solution of 1 gallon of water and 1 oz. of Dawn dishwashing liquid for small and medium size elements, for monster size double the formula and let soak for at least one hour then rinse with warm water shake off excess and let air dry, "WARNING" do not use compressed air as this will embed micro-sized dirt and road grime and destroy the mesh pattern and stretch foam elements out of shape just squeeze it like a sponge and let air dry, use a fan if you're in a hurry. When completely dry spray a very fine mist of air filter oil evenly around the whole element.
6. Remove the carburetors, disassemble and decontaminate with a "CARB DIP" or if you have EFI remove injectors and clean with carb spray and compressed air
7. Check intake manifold and seals for leaks and craks.
8. Remove fuel valve and filter disassemble and clean as necessary, remove, clean, and inspect fuel and vacuum lines and replace as necessary.
9. Replace spark plugs with new ones and check for spark.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Posted on Oct 05, 2017
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Posted on Jan 02, 2017
SOURCE: 2003 883 sportster wont start
What u are describing is typical of a faulty ignition system, but could also be a fuel problem. I check by removing the aircleaner and rotating the throttle. If u see a nice spray of fuel, thats probably not the problem. Check for a spark at the plugs. I can explain how if you need me to. If you cant see a good spark, U have an electrical problem. I had a crank position sensor go bad on me. Dont do what I did (replaced the battery, ignition, and regulator as part of my diagnosis procedure)
Posted on Nov 08, 2008
It might have tipped over on its side. Look at the air filter, if you see oil or gas on the filter then you might have to remove and clean the carburetor. I would start by cleaning/replacing the air filter and trying it again. If its getting fuel and the spark plug works then the only other side of the fire triangle is air.
Posted on Jun 06, 2011
SOURCE: The Stihl 038 super won't
hi there mwb15
have you made sure the ignition coil is producing enough voltage to fire under compression load ?
you may get a spark at the plug unloaded but under load it may be breaking down / weak making you think its got a fuel problem ?
does your system use a cdi coil system or point/condenser system ?
spark usually falls into weak spark, no spark catergory
if compression , fuel ( you replaced carb) and exhaust are ok , and you have air and vaccuum tight c/cases only things left are timming and spark
remember F A C T S
F = Fuel A = Air & ( air tight c/cases ) C = Compression T = Timming S = Spark
compression should be about 130- 140 approx if in good running order
take a look and let me know
Posted on Jun 19, 2011
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