20 Most Recent 1990 Suzuki Rg 250 Questions & Answers

Sounds like the float is stuck open. Try taking carb out and cleaning all the parts.

How about the gas filter? and carburetor condition? Adjustment?

The black wires are ground wires so they would go together. The halogen light has a white wire and this will connect to one or both of the yellow wires. To find out what yellow wire to connect it to, use a multimeter to test it out for continuity. Turn the ignition on and find out which yellow wire has power coming through it, touch the multimeter probe to the wire. Connect the yellow wire that has power to the white wire

i would say yes, but mabey with a few minor alterations, basicly should fit straight in on the engine mounts

letting up on the gas is ussualy a good idea because it allows the rpms to closer match the trannys. haveing said that there is speed shifting in which you barely bump the clutch and quickly hit the next gear. this takes a little practice and a good ear.

it sounds to me like its a bad earth on the battery leads or frame there are just two many parts that are all needing power but are not getting it, witch brings me back to bad earths or claped out battery, if the battery went realy flat it would have finished it off and no amount of charging will bring it back up to full power, try putting a new battery on the bike and checking all the earths points to see if there tight and clean also clean the battery leads, if you think your bike was driven look at the speedo, has it more miles on it or not?

i would have a look at the float needle and make sure its not sticking could cause the overflow of fuel

The likely problem is either a sticky float or a problem with the needle and seat.

The remedy is to remove the carb and pull the bowl for cleaning and inspection.

on the frames neck stem !

you could check Haynes manual, they have a wide variety of manuals

Hmm, if it only runs on choke and you have done all of those modifications I would think the re-jetting time is now. How did the bike run before all of the modifications? That is the magical question. If it ran fine before the mods, it's time to re-jet. If it ran bad before the mods. I would undo the mods, get your carbs running correctly and then reinstall the mods again. So I guess you have two choices.

sounds like a faulty battery to me, the headlamp is taking all the power and not leaving any to power the ignition system.

Check your Thermostat

what kind of bike are we working on?? the avg temp for the elec fan to turn onis around the 220 mark. the best thing to do here is bench test the bike start it up and let it idle, put a fan that moves air in front of the bike, this will help to keep things cool while the bike heats up i know it kinda back-@ssward but do it. a inferred temp gun will help you get the temp, you can pick one up at your local auto parts store. check the temp near the senser for the fan and the radiator itself. keeping a GOOD oil, clean oil in your bike that will help with the cooling as well. If your running a bike with a fuel filter ( If your not GET ONE ) make sure its clean. Bikes with fuel pump, you a two types in tank and external, your in tanks pumps should have a filter on them in the tank, over time they get clogged like a inline filter and can cause poor running as well.
If everything is working as it should you'll need to look into your coils. Heat causes resistance, resistance causes heat and heat causes wires to break down and contact points to to weaken. Coils take alot of abuse when it comes to electricity, it doesn't always happen but it does. coils go out and tire wear odd sometimes.
I hope this helps you out if you need any more help please feel free to contact me
Fix it right Ride it FAST
M.Woodring

There are several sizuki bandits...suggest adding the the model number...must of the inline 4 cylinders should have at least 4 spark plugs.

UNLESS YOU BUY THE TECH MANUAL YOU WILL HAVE TO GO ON LINE AND LOOK UP TORQ SPECS FOR METRIC BOLTS I DON'T KNOW OF ANY DEALER THAT WILL FURNISH THESE SPECS ON LINE
UNLESS YOU GO TO A DEALER AND TALK TO ONE OF THE MECHANICS

Adjust the idle to correct RPM say 900 or so.

check for bad grounds

Plug gap 26thou or 0.7mm
Valve gaps usually 8thou inlet and 12thou exhaust at TDC.

You never EVER connect anything directly to the generator, you connect it to the battery. On the light the black wire is the ground - connect it directly to the frame;the red one you connect it to the plus+ of the battery. Ideally you should put a simple switch on it to prevent constant use.