20 Most Recent 2003 Suzuki RM 250 - Page 4 Questions & Answers

If you noticed a knock that wasnt there before, something has changed, more oil wont help, time to pull the head and barrel off and start measuring and inspecting, if it gets worse and snaps the skirt of a piston it will cause more damage

Google for the information you need..

If you are referring to the power band,this is when your reed valves open.Check for cracked or damaged reeds.You need to remove carb and reeds are between carb and cylender.Check also the rubber boot that carb attaches to for cracks.this will cause intake air leak and cause reeds to not open properly.

hate to tell you this but the motor needs opening

The engine and the trans do NOT use the same oil. The engine oil is premixed with the fuel. The transmission oil is filled with the filler plug on the right side of the engine case. Look under the kick stand, see the 850 ml marking? The trans holds that much oil. Either drain the oil and add that exact amount.... OR you can take out the check screw located lower and forward of the oil fill on the case, should look just like a case bolt, but with an aluminum washer to seal it. Once you remove this bolt/plug you can add oil till the oil flow out this hole.

use the choke instead while restarting....

Have you adjusted it at all? does it make a funny noise when you hold clutch in?

.p.s. you really shouldn't be stopping in gear and holding in the clutch very long anyway--always best to neutral it when stopped unless you're about to begin a race or something

110mm oil height in each fork tube. Remember to bleed it first to ensure all air is out the inner chamber and then measure 110mm from the top of the tube, fully compressed with no spring or damping rod inside. USe a 5W fork oil. You can also look at WWW.RACETECH.com under search, and then valving search, enter all your relevant details and bike model and it calculates it for you.

White oil is normally an indication of a leaking waterpump seal.
You would need to repalce the waterpump seal which can be a challinging task unless you are mechanically adept. You would also need a manual showing the procedure.

Find out what the oil to gas ratio is.sounds to me like your running to rich.If your oil to gas is correct then the next thing to do is a compression check.this will tell you if you need a piston and rings.the oil on feder is blow by which is caused by too much oil or bad rings.thats about all i can tell you from description.

http://www.repairmanualclub.com/motomanuals/index.php

I would suggest doing a compression check and checking the results against your manual (should be at least 165PSI or so. Low compression will make the bike run rich which would make it smoke excessively. It would also make it hard to start and run poorly with low power. New rings could do wonders.

Scott

Sound like you have reasembled something Incorectly, poss selector fork not located on pin, either way i think you are going to have to strip it again, always good practice to try all the gears on the bench, after asembling the crank cases,you could check the gear shaft is located properly in the. Selector

If this is the four stroke version, the most likely cause for water in the oil would be a blown cylinder head gasket. Unfortunately the only repair in that case is a head skim and gasket replacement.

Is this bike a two stroke or four stroke.Meaning do you mix oil n gas,or dose it run on straight gas .If this a two stroke,its normal to blow blue smoke,but not that bad.Sounds like the person before you put to much oil in gas or piston rings are shot.There are exact oil to gas ratios you must follow with a two stroke engine.If you dont, you can have all kinds of problems.

could be too much 2 stroke oil in your mix or worse case, your piston rings are going.

Hello if your motorcycle is blowing a lot of smoke and oil from the exhaust and running poorly,sounds like you have worn crankshaft bearings or the main seal is bad and sucking transmission oil.

1.Intake leak
2.Old fuel the 10% ethanol is not a good fuel it attracts water..
3.Idle slightly too high and spark advance keeps advancing and then retarding.
Try dropping the idle some. Warm it up to normal operating temp first.
4. Float is opening and closing seat changing the fuel level in the bowl
5. Spark plug is dirty.
6. Compression changing as it warms up

Good luck

use the correct poss ion to fut fork oil........ and you should be drain new oil and them drain off the old oil

Hi,
You need to change spark plug with original one. Please get it on your owner manual