need help [classic clogged carb - Ed.]

[spree1]

i have a 87 honda spree. it starts and runs. when i try to use the throttle to accurate it goes up then suddenly dies out. i checked every thing. even adjusted the air/fuel mixer screw no help. what is the problem.

[motormike]

Trash in bowl,.....main jet,.....idk

[spree-rider]

is your airfilter intact, connected to carb and oiled?
check for airlleaks?

[reynoldston]

When I bought my two Honda Sprees I had the same problim with one of them. The person I had bought them from had left old gas in them and it pluged the carburetor. I took the carburetor apart and cleaned it out with a small wire and a aerosol can of carburetor cleaner with a straw in the nozzel and then blow it all out with compress air. As I recall it took me more then one try seeing that every thing about that carburetor is very small but then I got it clean it has ran just fine. I don't know if this is your case or not but it sure sounds like you must have dirt in your carburator pluging the high speed jet. I found to get a peace of wire small enough to clean out the holes, I took a peace of electrical wire and took one strand of it. I sure hope the best of luck for you because they are sure a low maintenance fun bike to ride.

[Wheelman-111]

Greetings:

Agreed you should check out air filter and perhaps replace the spark plug, but it sounds like a classic case of a fuel resin-encrusted carb.

Carb "adjustment" is seldom required. Consider that this scooter once ran well. If the carb was set correctly at one time, it's not likely that changing those settings will do anything good.

Time to read up on carb-cleaning procedures.

One other item to check out is the exhaust for carbon build-up. Do the above first.

[reynoldston]

I agree on the pluged muffler. I forgot about it but last year bugs built a nest in one of the mufflers and it did the same thing. The tail pipe is very small. That would also be a good place to also look. As I remember the nuts were rusted on the exhust studs so be very careful you don't break the studs off if you have to remove the exaust system. If the nuts are rusted onto the studs use some heat or stread the nuts with a chesil first. If you end up and breaking a stud you will have a whole new set of problims so be light handed and carefull on this part of it because they are only 6 mm. This is the nice part of this forum is a lot of fresh ideas like the air cleaner, carbon in the muffler, and plugs. As far as the plugs go it just seems that it would not run at all but I also learn as I go. The best of luck.

[spree1]

first of all thank you all for your responds. the bike runs okay. i can go up to 15 mph on it. if i try to go over it or accelerate to fast its goes blah sound. it it still all these?

[spree-rider]

yes, clean carb, check airfilter and spark plug.

[Bear45-70]

Proper scooter carb cleaning 101.

http://hondaspree.net/wiki/index.php5?t ... r_Cleaning

http://hondaspree.net/wiki/index.php5?t ... ture_Guide

http://hondaspree.net/wiki/index.php5?t ... Valve_Seat

[reynoldston]

Before you take things apart make sure you are getting a good fuel flow to the carburetor. Seeing it runs good up to 15MPH it sounds like it is not getting enough fuel to run at fulll RPMs. You can do this by taking the fuel line off at the carburetor. Now go up by the front of the seat and you will see a valve. This will have two lines to it, a large one (fuel line) and a smaller one (vacumm line). Now put something under the line by the carburetor to catch the fuel. Now run the starter to get vacumm to the valve and you shoud get a good fuel flow by the carburetor. If you can't run the starter you will need a vacumm pump which you will have to hook up on the small line port seeing this is a vacumm operated valve. If you dont get a good flow I would change the lines first. If you stll don't, take the tank off drain all fuel out then take the valve off and see if someing is slowing the fuel flow. I have never had one of these valve off so I don't know what to tell you to look for. Maybe someone else on the forum has and would tell you?

[spree-rider]

wrong^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[spree1]

i cleaned the carb. and checked every thing on it. right now i have the air/fuel screw all the way in. when i try to open (unscrew) the air/fuel valve it dose not run right. it make it worse. i when i use the accelerator it kills the engine faster.

[Bear45-70]

i cleaned the carb. and checked every thing on it. right now i have the air/fuel screw all the way in. when i try to open (unscrew) the air/fuel valve it dose not run right. it make it worse. i when i use the accelerator it kills the engine faster.

You have a float level issue and the carb needs to come back off and apart.

[reynoldston]

The air screw opening is 1 3/8 turn out on 86 and newer.

[noiseguy]

15 MPH and no faster is not likely a carb issue if it's idleing. More likely air leak or missing filter element. You have an air filter and the stock box, right? Not just running with an open carb mouth, yes?