carb size??

rwalton3563 · #1 07-16-2009, 01:37 AM

anyone have info on the carborator thats on the china 80cc?? like what the size of the bore is? or how to measure the carb?....any info is helpful...i was thinking about getting a carb that can be tuned by adjusting a screw instead of a clip and pin type!!...thanks

old motorbike · #2 07-16-2009, 07:18 AM

I believe it's a 16mm bore. There are other more sophisticated carburetors out there and price goes up. Do a google search.
The clip needle is still being used in some m.cycles (that aren't fuel injected yet).
It's a simple system to set up, but mine, I had to also use a smaller jet also to run better.

motorhead419 · #3 07-21-2009, 04:17 PM

If I'm not mistaken the majority of the carbs are 13mm..

azbill · #4 07-21-2009, 05:07 PM

I have seen 16mm with a pic of the digital mic

motorhead419 · #5 07-21-2009, 07:50 PM

I just got out a new carb from a 80(66)cc kit and got 13.8mm..(.545 inches) I checked it twice. The slide is 14.5mm (.569) so the carb can't be 16mm....They do have the new style 80cc carb which is a little bigger and it has the fuel shut-off valve on the right side of the carb..

xlite · #6 07-21-2009, 08:35 PM

Quote:

Originally Posted by motorhead419

I just got out a new carb from a 80(66)cc kit and got 13.8mm..(.545 inches) I checked it twice. The slide is 14.5mm (.569) so the carb can't be 16mm....They do have the new style 80cc carb which is a little bigger and it has the fuel shut-off valve on the right side of the carb..

I also get 14mm for the slide and AFAIK NT carbs have always had inlets on the right.

Jets on 4 of my 80cc were just narrowed and all of them ran smoother. No big increase in top speed but no roughness at WOT now.

motorhead419 · #7 07-21-2009, 08:42 PM

I know they have inlets on the right side ,but if you go to SPOOKYTOOTH you will see the new style 80cc carb with the shutoff valve right on the carb itself..It's the new style NT carb 66/80cc

motorhead419 · #8 07-21-2009, 08:56 PM

I'm trying to get a good used 18mm Mikuni...I had a new one on ebay in my grasp for $50.00 and let it go..They got other new ones for $65 + shipping. I'm just looking for a good $25.00 used one..I got plenty of Mikuni Jets and needles. So if anybody out there has a good used one give me a shout.

xlite · #9 07-22-2009, 05:53 AM

Quote:

Originally Posted by motorhead419

I just got out a new carb from a 80(66)cc kit and got 13.8mm..(.545 inches) I checked it twice. The slide is 14.5mm (.569) so the carb can't be 16mm....They do have the new style 80cc carb which is a little bigger and it has the fuel shut-off valve on the right side of the carb..

Ahhh... I thought you meant as opposed to left side. Thanks for the tip. I've been waiting for an 80cc NT carb for years. It explains the 16mm comments too. I wonder what that screw is on the right side?

Spooky don't appear to sell parts. Anybody know where one might buy one of these new carbs?

motorhead419 · #10 07-22-2009, 09:13 AM

I just got one from spookytooth..and it isn't 3mm bigger as they say..I'll go remove it off my bike and measure it right now..The slide measures .589 (14.9mm) I couldn't go by my carb on the bore size because I've already reamed it out, but I'd say they are 14.6-7 mm, so you gain about 1mm in carb size. I taper bore them out for better flow. I just tried to download a pic but they said it was too big. Here's my email motorhead48@msn.com I'll send you some pics of it. I'll sell it for the price I just paid for it if you're interested, because with my mods I really need a 18mm.