Question about 2002 Honda CR 125 R

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I put a new piston and gasket kit on my cr 125 1997 and it still has no compression at all you can push down the kick lever with your hand??i need help i just bought it two weeks ago

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  • Honda Master
  • 3,433 Answers

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

Posted on Nov 20, 2009

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1 Answer

Got nearly no compression when kickstarting it


Could be rings ... could be valves ... could be holes in the pistons ... could be hole in the head ... gasket ... could be any combination of troubles ... could be your kick start is not engaging ... (I doubt that) ... good luck with your project. Get a GOOD BOOK on the subject before you turn the first bolt and get your wallet on an exercise program.

Jun 21, 2013 | 2002 TM Racing E 125

1 Answer

The kick start on my blaster used to work now it just goes to the ground and you can use your hand to do it. are the idler gears bad or is the compression bad? and can a reed valve cause this


If you can turn your engine over by hand easily by pushing down the kick lever, and your not Arnold Schwarzenegger, You have a compression problem. Do a compression check. If your bike has under 100 PSI you need to disassemble the top end , bore or hone the cylinder (depending on condition) and install a new piston, rings, and gaskets. This should fix low compression. If the lever is going down but the motor is not turning over then you need to remove the side cover and check for broken kick gears. Reed valves have nothing to do with this problem.

Jul 21, 2010 | 2002 Yamaha TT-R 250

1 Answer

Kick starter has no compression, will not shift


hi, will the shift lever shift up when the bike is being pushed along, is it stuck in neutral, if its in neutral then push it down make sure it goes into 1st gear then can u get someone to push u whilst holding the clutch in then release the clutch and see if you can jump start the bike that way.

when you push the kick start down is it turning the engine over properly and if so if the compression is really to low then the chances are the piston ring has broke and scored the side of the cylinder if this is the case then you need to get new piston and rings and a new cylinder.

The problem with moto x bikes is they are high power and work at really high temp so parts need changing more often the piston rings need changing every 25 to 35 hours of riding time you need to do this as they ware and brake if used any longer.

you also need to make sure you get the petrol and oil mixture spot on as if its not getting enough oil it will blow the piston and rings so you need to measure exactly the correct mixture.

these bike are expensive to maintain and need new parts on a regular basis so remember this the next time you get the bike running

Mar 01, 2010 | 2005 kawasaki KLX 110

1 Answer

What is a top end kit for a suzuki ay50 and how easy is it to fit


a top end kit consits of a 1x piston 2x circlips 1x gudgeon pin 1x set of rings and 1x gasket set basically you take the carb off take the exhaust off take spark plug cap off undo bolts on head/barrel remove gasket slide the barrel off removing bottom gasket then take the circlips off 1 side then push the pin through i put a piecwe of card bord or rag in the crank to stop **** falling down through when you slide the pin out the piston will come out then you will see a bearing in the con rod leave that in there then get new piston put ciclips in one side then get the gudgeon pin put some oil on it and put it in place of the little bearing the push the pin through and put the circlip in and then put the rings on then in the ring gap you will see a little pin the gap in the ring goes in beetween that little gap then you put the base gasket on then inspect the barrel if there is dips in the lining re hone it or get some glass paper and rub it till its smooth but not too much or it will rub down to much then rub some oil in the barrel then put the barrel over the piston and compress the rings and slot the barrel down the pistonand put head gasket on and put head on and tighten bolts/nuts then replace carb good luck

Aug 22, 2009 | 2001 Suzuki AX 100

3 Answers

Its getting dam near impossible to kick start, it will start after 30 or so kicks, any ideas?


Could be low compression due to head gasket leak, worn piston rings. Or bad spark due to dirty plug, wrong gap, plug breaking down, lead or cap breaking down, ignition fault. Choked air filter, fuel filter.
Try these in easiest order I.E. remove air filter and see if it starts easier, do a compression test, cahnge plug, lead cap. Check the fuel filter.
I am sure it's a simple solution.(high milage engines tend to be difficult to start so take this into account)

Jun 27, 2009 | 2004 Honda CRF 450 R

1 Answer

Smoking horribly


The white smoke indicates the need for new valve guide seals. The black smoke indicates that the fuel/air mix is far too rich. Re-jet the carb to stock #137 main jet. Don't mess with the pilot jet if the bike idles okay. No other settings to mess with. Install a new stock plug ; NGK R CR9E

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ALWAYS have a fire extinguisher on hand when working on carburetors.
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 and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Check the jet needle clip on the top of the needle. Put it in mid-range. Put the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine.

I just thought of somthing. You may be creating the rich mix problem yourself. See the following starting instructions.

There is a proper way to start the engine. Four controls are on your bike to assist in starting.
  • The choke, used when the engine is cold. Pull the red knob for choke.
  • The " Hot Start " Lever, used when the engine is hot. Pull the lever to lean the fuel mix when the engine has been running.
  • The de-compression lever, always used.
  • The throttle, used to prime the cylinder.
Don't kick, instead, push the kick lever downward. You will feel the back pressure as the piston is going upward on the compression stroke to the point the pressure is great enough that the kick lever "locks up". You are very close to TDC. NOW, pull in the de-compression lever. Push the kick lever a little bit more to get the piston past TDC. Now release the de-compression lever. Give the throttle a 1/4 turn then let it snap closed. A diaphragm in the carb gives a shot of gas when this is done. DO NOT do this multiple times because you will flood the engine. Leave the throttle closed when kicking. Now give a strong kick through the full sweep of the kick start lever. Quickly get your foot off the kick lever at the end of the kick to avoid any chance of "kickback" from the kick lever. This happens in the case of a misfire, aka > backfire. It can be very painful, and can even break a leg. I am serious about that. Repeat the process (but without the throttle priming), until the bike starts. A good battery, a clean spark plug, a clean carb and clean air filter will also aid in starting.

A “very helpful” rating for this answer? Thanks!

Jun 20, 2009 | 2002 Yamaha TT-R 250

2 Answers

VERY hard starting takes way to many kicks usually play out befo


There is a proper way to start the engine. Four controls are on your bike to assist in starting.
  • The choke, used when the engine is cold. Pull the red knob for choke.
  • The " Hot Start " Lever, used when the engine is hot. Pull the lever to lean the fuel mix when the engine has been running.
  • The de-compression lever, always used.
  • The throttle, used to prime the cylinder.
Don't kick, instead, push the kick lever downward. You will feel the back pressure as the piston is going upward on the compression stroke to the point the pressure is great enough that the kick lever "locks up". You are very close to TDC. NOW, pull in the de-compression lever. Push the kick lever a little bit more to get the piston past TDC. Release the de-compression lever. Give the throttle a 1/4 turn then let it snap closed. A diaphragm in the carb gives a shot of gas when this is done. DO NOT do this multiple times because you will flood the engine. Leave the throttle closed when kicking. Give a strong kick through the full sweep of the kickstart lever. Quickly get your foot off the kick lever at the end of the kick to avoid any chance of "kickback" from a backfire. It can be very painful, and can even break a leg. I am serious about that. Repeat the process (but without the throttle priming), until the bike starts. A good battery, a clean spark plug, a clean carb and clean air filter will also aid in starting.

Top rating for this answer? Thanks!

Jun 11, 2009 | 2003 Yamaha YZ 250 F

1 Answer

2005 250 f 65 kicks to start


Several things can cause the problem. First, spring for a new spark plug. The stock plug is NGK CR8E. Now the plug is eliminated as a problem. Next, pull the slide out of the throat of the carb. Now remove the jet needle. Put the needle clip on the 4th notch, (this is the stock setting). Use only premium gas. Next, follow the starting instructions below.

There is a proper way to start the engine. Four controls are on your bike to assist in starting.
  • The choke, used when the engine is cold. Pull the red knob for choke.
  • The " Hot Start " Lever, used when the engine is hot. Pull the lever to lean the fuel mix when the engine has been running.
  • The de-compression lever, always used.
  • The throttle, used to prime the cylinder.
Don't kick, instead, push the kick lever downward. You will feel the back pressure as the piston is going upward on the compression stroke to the point the pressure is great enough that the kick lever "locks up". You are very close to TDC. NOW, pull in the de-compression lever. Push the kick lever a little bit more to get the piston past TDC. Give the throttle a 1/4 turn then let it snap closed. A diaphragm in the carb gives a shot of gas when this is done. DO NOT do this multiple times because you will flood the engine. Leave the throttle closed when kicking. Release the de-compression lever and give a strong kick through the full sweep of the kick start lever. Quickly get your foot off the kick lever at the end of the kick to avoid any chance of "kickback" from a backfire. It can be very painful, and can even break a leg. I am serious about that. Repeat the process (but without the throttle priming), until the bike starts. A good battery and clean air filter will also aid in starting.

This will likely tame the beast for you. Please rate this answer. Thanks!

Jun 06, 2009 | 2003 Yamaha YZ 250 F

1 Answer

I have a cr 125r and i have boared out the cylinder and put a bigger piston in it. i installed the pistion and new ring in the cylnder and it fit tight but was a good fit. i pushed the kick start a couple...


I assume you mean that you put fresh oil in the gearbox, not that you put oil in the cavity the piston rod is connected to. Putting oil in the crank area would cause a hydraulic lockup. The fix is to pull the cylinder then turn the motor upside down and dump the oil out. Flushing the crank with some gas wouldn't hurt. The crank and piston get lubrication from the oil mixed into the gas.

Position of the rod does not matter. If not a hydraulic lock up then only three things come to mind that would cause lockup.
  • A piston ring hanging up on a cylinder port.
  • Something dropped into the crank area and is now binding up the crank. Got all your sockets?
  • The bike is in gear.
Let me know what you find. Please rate this solution. Thanks!

Mar 28, 2009 | 2002 Honda CR 125 R

1 Answer

Hard starting


Hi,

You need to inspect the valve clearances. It is common for the intake valves to wear a little.
Inspection of the clearances should take place at 15 hour intervals if you are racing the bike.

When the valves leak, the bike does not maintain compression and kick starting becomes tough. The fact that the bike starts when being bumped, shows a loss of compression.

An easy DIY compression test is to remove the spark plug, place a finger over the plug hole and press down on the kick start lever. The air should be forced past your finger at a high rate and you should hear the air escapeing. You must not be able to prevent any air from escaping.

Good luck

Jon

Mar 07, 2009 | 2002 Honda CRF 450 R

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