Question about Honda CB 250 Motorcycles
It idles find but when you take off it has a flat spot, but it cleans it self and rides fine up to 5000rpm and cuts out then you roll for 500m it will start and ride if you don't go over 5000rpm or stop it is hard to get going. can some one help please
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Posted on Jan 02, 2017
In 1983 the carb used on this model was a kehin. They can be made to work well, with a couple of tweaks. First, on the top about midway, you will see a boss sticking straight up. Unless it has already been done, use a jabsaw and cut the top 1/8 inch off the top. Using a tiny improvised screwdriver, back out the idle adjustment screw which is down inside about a half a turn. Then remove the float bowl. You will see 2 tubes hanging down. Remove the rubber plug from the larger one and remove the low speed jet. The jet and the mixture screw are soft brass, so make sure you don't shred them. The jet has a number stamped on the end. Go to a knowlegble shop and get the next size up. For example if you have a 52 and they say the next size is a 54, that's what you want. Take the old jet with you and compair the size of the air holes along the side. They should be the same size. If not, they are selling you a jet for a cv carb and that will not work. (common mistake) Don't forget to shove that rubber plug back when you reassemble it. If I have your problem pegged correctly, the bike will be less cold blooded and the driveability will be much better.
Posted on Jan 06, 2009
SOURCE: bike keeps cutting out
sounds like either your fuel vent on the tank is clogged ( the rubber hose coming off the top of the fuel cap) or #2 your spark plugs are fouling out which is probally the most common thing with a 2 cycle engine.
Posted on Jan 27, 2009
You should measure the fuel pump's supply first to check that the pump works ok.
When it dies, do you hear the pump pressing your ear against the fuel tank and turning the key to on position and your kill switch to on too?You should hear it working for 3 sec.If not working at all start by checking the pump's relay and then the pump itself.
Posted on Jun 08, 2009
Like I told somebody earlier to day lower the octane rating of the gas you are using....repost if you need anything futher......
Posted on Jun 22, 2009
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