20 Most Recent 2002 Honda CR 125 R - Page 7 Questions & Answers

If a big guy used to own the bike,he probably wound the rear spring tension up.Have a look at the rear shock and you will see a large threaded section on the main part of the shocky.It has a plate going around it that the spring sits on.This has to be wound away from the spring to ease up the preload on the spring.On your model,I am not sure about the front settings.Hope this helps

32:1 is the official ratio

If you run it hard or wide open all the time you can go as high as 25:1 so you have more oil to keep the engine cool and oiled. If you putz around on it then you can go as low as 40:1 so you don't foul plugs and less smoke.

you tigthen the little bolts that hold the springs right up till they stop other wise the springs wont do there job right and if the little bolts come out because they are loose you could cause all sorts of problems

The mixture screw is used to get the transition from idle to throttle up smooth, and not to bog.
Sounds like your jetting is to rich, or too big. Read your plug as it's probably black. Then go smaller on your pilot jet, run it and read it again. Make sure you run 32:1 mix, and jet the bike to match this.

You should have a little free motion at the cable when the lever is all the way out. This is so the clutch won't drag. If your adjustment seems good, and you have changed your tranmission oil, you might have an issue with the clutch worn out.

Sounds like its starving for fuel. When the engine stops, instantly turn the fuel valve (at the tank) off. Then ck if the carburetor has any fuel in the float bowl.

Purchase a shop manual from local dealership and in that will have all the ohms resistances in there. Test all electrical components before buying anything to be certain it is what you need.

The bike has a bent shift fork. The engine comes out and the top end gets dismantled then the gearbox dismantles and then splits in half. Now the gear sets come out and you can get to the shift drum and shift forks. I don't recommend a complete engine tear-down be done if you don't have the special tools needed and some serious experience. The shop will fix it for $750 to $1250. Bummer. If you do try the repair, don't start without a factory service manual.

Honda 4 stroke, correct? It sounds like you have the valve timing off. Put a compression gauge on it and if you have 0 compression ,you shou;d reck your valve timing. Good Luck

take the fule pipe off the carb and turn fule tap on to see if fule is coming out of the tank,,if it is,,strip carb and clean all the running jets out,,, dont go poking wire into them as this will do more harm than good,, just blow them out with comprest air,, check flote velve as well,,
hope this helps you out

Check the CDI-box. Then the spark-plug wire. You could remove the tank and the seat to see the CDI-box.

If this is something that just started, I'd check the spark plug and ignitions system first. Then move to the air filter and carburetor. Check the silencer in the pipe to see if it's clogged up.

Try a compression test first see what it is, next check for spark, remove plug from engine leave connected, ground the end of the plug to the engine and kick over, if you have good compression and spark, it is in the carburation, some bikes dont start well when cold due to bad carburation(air leaks, bad jets etc)you could try roll starting down hill and see if it starts.

plug fouling maybe whats your plug like what is it get back to me im a motocross engineer

Did your bike shift gears prior to installing the new shift lever? Why did you replace the lever? If the bike was dropped and the shift lever damaged, the shifting mechanism inside the engine may have been damaged as well. This mechanism will probably be on the primary drive side of the engine and you'll probably have to pull the clutch drum to get to it.

sounds like the float in the carb is stuck or set to the wrong hight give the carb a few taps with a screwdriver if that dont work take the carb off and check the float and needle.

The clutch cable sounds like it's broken.You can check this by removing the cable and see if the braided metal cable inside the outer cable has snapped

it sounds like you have worn clutch plates remove the cover of the clutch you will see the clutch plates held in buy 4 bolts with springs remove in a criss cross way rember the way they came out if they are black or dont they flat on a sheet of glass or flat plate they are bent replace clutch plates on springs

Sounds like you've blown a fuse rick .Also check for loose conections on solinoid and make sure it's getting 12v across the 2 low(12v)terminals best of luck....Tabs.

buddy run the bike onh 40:1 and on the carb will be a screw the mixture screw turn this in and unscrew it 1 turn out and try this i had this problem with my kx85 which i just blew the big end on so i cant race for a while get back to me if not ok also run the br8eg plug in it