Replacing Stock Carb

Mopedamauter79 · #1 05-04-2009, 07:57 PM

I'm looking to replace the stock Carb I have on my 2 stroke but I don't know where to get one and which one's will fit. I live In Canada if that helps.

Outrunner · #2 05-04-2009, 08:06 PM

I bought a Mikuni 18mm carb from Texas Motorsports. It will fit
right onto your manifold and give great performance too.Try
theatvshop.com or call 903-295-0104

Mopedamauter79 · #3 05-04-2009, 09:23 PM

How much of a impact on performance does a different carb have ? specifically that one.

Outrunner · #4 05-05-2009, 05:20 AM

Much better throttle response and smoother idling. I took the time
to "read" the spark plug to see if it was running too lean or too rich.
The Mikuni carb has many choices of main and mid range jets or
needle settings to tune it to your engine.

Bikeguy Joe · #5 05-05-2009, 09:49 AM

There are also Walbro carbs that are direct fits....there are several threads here about them.

The basic and most important improvement is the ability to adjust them, whereas our chinacarbs have very crude adjusting capabilities.

Mopedamauter79 · #6 05-05-2009, 11:17 AM

Yah the motor idles very quietly now but rides rough and I know it's the carb doing it. There isn't any other setting I can do to get rid of the rough riding. If I turn the screw away from the carb anymore the motor wont idle as the rpm's will be to low.

**Norman** · #7 05-05-2009, 11:59 AM

you can send me your carb and I can make it purr. Lots of very small things to check and do that one mistake and you will need to buy more parts there are some carbs that come out made very well and some I think are using reject parts just to get them out the door.
One thing is find out the size of the main jet then mic. the needle it has to be tapered right or it will idle rotten and have a miss off idle up to about mid range and at wot if the jet isn't right it will bog and do all sorts of strange things. I did mine just yesterday the needle was off and the main jet was way too small and out of round.
Once you get the carb dialed in with a 70cc engine and a 44 tooth rear sprocket you can take off by pushing off with your foot and no pedaling and go!
Norman

Mopedamauter79 · #8 05-05-2009, 12:00 PM

Quote:

Originally Posted by Norman

you can send me your carb and I can make it purr.
Norman

Lol. Stock carb ? I can't see what you could do to it to make it run better.

I found a carb on ebay however.

Ebay Item number: 250417131389

Edit: Where is the air filter supposed to go ? I don't even see one on the pic of the carb.

jvirginillo · #9 05-05-2009, 12:38 PM

Hey Norman I might hit you up on that offer. Do you have access to an inexpensive supplier for a carb? I'd pay you to clean one up for me and ship up to Canada. At a minimum I would have a least a decent carb to test with. What do you think? The carbs from Zoom Bicylces up here are $17.95 US but shipping both ways would make it pretty expensive. I'd rather pay you for your time.

Bikeguy Joe · #10 05-05-2009, 03:33 PM

The screw on the carb does nothing but physically move the slide up or down to adjust idle speed.

Moving the C-clip up a notch will make it leaner, down a notch will make it richer. You HAVE to look at the plug to see where it's running, then adjust accordingly.

I'll bet you arew rich and it's four cycling at anything over 3/4 throttle.