Honda Spree and Elite 50 Forums

Hello all, I have a different method of cleaning the carb that was quite effective.


First, completly remove the idle adjustment screw. Next, use the carb drain screw to drain the gas from the carb.
Next, take a can of SeaFoam, and a Syringe, and inject 50 cc's of SeaFoam into the carb through the idle adjustment hole. Let it sit for 5-10 minutes. Inject another 100 cc's of Seafoam into the carb, and then use the syringe to withdraw the SeaFoam. Dirt and gunk and what not that is in the carb will come out. What doesnt come out, will on the next step.

Discard the withdrawn dirty SeaFoam fluid.

Inject another 50 cc SeaFoam into the carb.

Replace the idle adjustment screw, and reset the idle to what you had orignally (or close, for me, it was 2 complete turns out from being tight).

The bike will be hard to start, just keep at it. Takes 3-10 trys to get it started.

Once the bike starts (make sure your in A VERY WELL FREEKING VENTILATED AREA!!!!!!) Rev the bike up about 10-25% throttle. Just rev it up and down up and down for about 3 minutes.

Finally, after the 3 minutes, take it for a ride at Top Speed. Preferably on a not so busy road, as you will create a massive smoke screen behind you blinding other drivers!

After about 1/4 to 1/2 mile of driving, You should notice, that you have regained your speed (if speed issue was your reason for cleaning the carb).
You will also notice a smoother ride, faster acceleration.

The SeaFoam breaks down the gunk in the Carb, which some gotten removed, but most was just broken down so I could be burned. The SeaFoam also just royally cleaned out your combustion chamber.


This little process gained me an additional 3 MPH after removing the Exhaust restrictor and Clutch restrictor plate. After removing those, I was at 33 MPH top speed, now I am at 35-36 Mph

Ooo, Seafoam. That's a good idea. Seafoam is meant to dissolve in gas, and injecting it through the idle screw hole is a good way to get at the idle jet without disassembly.

Take it apart and do it the right way. An extra 3 MPH on top...LMFAO!

It's in tech docs now. Lots of guys swear by Sea Foam for cleaning MC carbs.

i guess spreewell doesn't like the idea?

how much is it and where do u get it??(seafoam that is)

personally i like just takeing it apart and cleaning it, im so good and fast at it by the time u finish ur first cycle of seafoam i will be done and mounted on the ped...

yes but in the process of putting it back together a HUGE chunk of dirt gets lodged in the jet and it never works again.......lol

Just tryin to say that in taking it apart and putting it back together you could make matters worse, also it wears on ur gasket.

well, i never ever have that problem because i blow it all with compressed air before i put it together, and then i only clean em with nice clean hands, and i only do it in a nice dust free aera.

I really appreciate the tip. My two experiences working on car carbs involved me buying the kit, working on it, screwing it up, then having a mechanic fix it.

So yeah, im gonna do it this way.

I tried the SeaFoam and it's true, I got an extra 3MPH on the top end. It seemed to good to be true so I did it again and got another 3MPH! My Spree is going 40MPH now. Whooly shizzlewizzle!

shizwizzle??? *??

I know seafoam can be added to regular eng oil with no ill effects.

AH yes seafoam we got a s*** load of that in our shop in the back. Works great.

I tried it and it didnt do much. I think my belt needs replaced. When i get that fixed i will see if it helps.