new carb

where is best place to buy a carb? my bike is running very rich and wont idle properly. ive had it to bits now three times and ultra sonic cleaned and played with both screws a number of times but its still playing up anybody any ideas other than a match!!!!

Have you checked the float level? Also make sure the float hasn't punctured. Mine used to dribble if left with tap on, float had small hole, found by putting into hot water - air bubbles can be seen. Float needle sometimes gets worn, easier to replace than reseat. Vmax

Thanks vmax, float ok needle jet looked ok but i will check 2mz. thanks lee

The only time you really need to buy a new carb is if there is a hairline crack or other major issue that cannot be fixed. A few years back I had issues with my carb and the gasket kit was nearly as much as a replacement Chinese carb (with the tap on the other side)!

yeh! i now what you mean james. a carb is just as cheap as carb kit? so i dont now what to do. it just wont idle right at all and smells really rich??????? im waiting for waynus to sort it out!

I think Waynus wrote a post on here about a year ago that details what the standard carb settings should be. Unfortunately, carbs appear to be quite simple but they are intricate instruments that can cause serious running issues if not 100% tuned correctly.

I had someone fiddle with my carb last year who thought they knew what they were doing (so did I because they used to race motocross), then 10 miles later my engine was smoking and now something is terminally wrong with it lol (hence why it's off the road this year)!

that doesnt sound good. i dont want to be doing that.
regards lee, ps ill wait for waynus to see what he says!

Just found Waynus' instructions, look here: http://www.st70.net/forum/viewtopic.php?f=7&t=132

Hi guys
just seen the post I had problems getting mine to run in the end I got a replacement which is ideal but my old carb had done 13k miles and had wear on the screws and castings which ment that the settings constantly varied. New parts were just silly price so a new carb was a bargain unfortunately the original air filter no longer fits but I have done in excess of 800 miles on the new one and it runs like a sewing machine, Oh and touch wood
regads Tufty

thanks everyone i will give it ago. if not wheres best place for a good copy carb??