20 Most Recent 1987 Suzuki Rg 250 Questions & Answers

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.

two stroke gearbox oil, or four stroke engine oil,both are designed for use in the gearbox. has to state for motorcycle use on the label, as car oils can have friction modifiers that cause clutch slip, and dont be fooled into using automatic transmission fluid, some swear by it cause its thinner and good for the clutch , but the gears will wear faster, and eventually break.

No not really because you can easly damage something,if you have a spare crankshaft nut then undo the crank nut till its level with the end of the thread ,then using a piece of hardwood over the end give it a sharp knock with a big hammer ,if that doesnt shift it then get a puller sorry i couldnt be any more help but some of these things are not designed to be attacked by hairy backed idiots like myself

If you have converted to a pull starter than no you do not need the starter motor

it will move up and down as necessary to keep the fuel level in check.also it has to move up and down to open and close the float valve

clean air filter, and clean carb with spray cleaner.make sure carb choke is free to move.look for vacuum lines off or stopped up. if trash is in the carb just draining it might not be enough,you may need to clean the jets or float needle valves too.

please buy a repair manual-they hav details of every part of bike

On the GZ, the carburetor sits directly beneath the frame and where it makes a "Y" to split down both sides of the bike. First drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Remove the float bowl. Everything comes apart with a phillips screwdriver (not a #2)

Look on your title for the VIN number (frame number). Call a Suzuki dealer and they should be able to tell you what year and model you have. This assumes the bike is within around 15 years old.

Along with replacing the piston, I would assume that you are replacing the rings. I would also hone out the engine while you are at it, that should help make it last longer. Otherwise it sounds like you are on the right track. Let me know how this turns out.


Benjamin

Behind the radiator on the left side. It is the device with cooling fins, even though the electronic parts are embedded in rubber paste.The location isn't ideal and sudden defects leave people stranded so what people do is relocate the regulator/rectifier to a cooler place. Perhaps to the air inlet, under the air filter. Follow the three, mostly, yellow cables that originate from the stator when you don't find it behind the radiator.

What do you mean by "Midway"? How old is this motorbike? What exactly did you do to clean the carburettor? Is it a new spark plug and a new, clean air filter? Did you empty the fuel tank to remove the fuel tap to clean the filter on the inside of the tap? Is it doing anything else? Things like - is it hard to start, has heavier exhaust smoke or it has a rough and uneven idle.