ALERT : TaoTao ATM50 ALERT

[skuttadawg]

Nooooooooo not all 4T are throw away but some brands are

[Greg]

Last week I bought a jmstar 2011 sunny style with about 1180 on the clicker.
Its a "no start" fixer upper that I got cheap.
This machine has about 40 psi compression, so I know why it won't start.
This is my first experience with a sealed carb. I popped the aluminum cap off that was over the air/idle screw.
Inside there is a long needle with a spring around it and a "D" shaped head on it.
Can I put a slot in this and use it as an air/idle adjuster?
I'm thinking these are leaned out, maybe due to elevation/temps but probably to satisfy some DOT emissions requirement.

[Deleted]

yes but....is the bowl sealed too? you would need to rejet any sealed carb if you are going to do anything at all to it. some have open bowls but sealed a/f adjusters and some are fully sealed. I quit messing with sealed carbs altogether after i popped the plug off an a/f mix on a Renegade only to find there was no way to adjust it anyway...no screwdriver slot or D at all.

They are doing this to satisfy C.A.R.B emissions from what I understand. ( California Air Resource Board)

[Greg]

Ah! I did not know there were such variations.
I read your alert, checked my compression then checked the carb and see this scoot fitting your pattern.
The carb on this scoot does not have a sealed bowl. Looks like a normal CVK but I was shocked to see the cover over the a/f screw. I have heard of these but this was my first time seeing one.

[Deleted]

Apr 21, 2012 18:53:48 GMT -5 Greg said:

Ah! I did not know there were such variations.
I read your alert, checked my compression then checked the carb and see this scoot fitting your pattern.
The carb on this scoot does not have a sealed bowl. Looks like a normal CVK but I was shocked to see the cover over the a/f screw. I have heard of these but this was my first time seeing one.

youre in luck then..that might be a carb you can work with. does it have an adjustable needle in it? i doubt it but its worth checking. you can raise that up (lower the clip) to richen it up a little too.

[Greg]

Yes. It was on the middle groove and I moved the clip down one. I'll take the pilot and main jets from another carb I have that leaks.

[tedwards1222]

What's up guys, new to the forum and scootin. I brought a Atm and after reading this post, what size mm carb and what jet size should be used

[Deleted]

18mm PD18J Keihin off ebay is what ive used they come jetted 85 main 33 pilot. The bike in this thread wanted a 95 to run right so i suggest getting an 88, 90, 92 and 95. as well. one bike may need a 95 while another may be good with a 90.

www.ebay.com/itm/170769236151?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_6768wt_754

enviromoto.ecrater.com/p/4129835/naraku-main-jet-set-gy6-50

replace the one you end up using from that jet set then put the set up for sale in the for sale section maybe. or keep them if you plan a big bore kit in the future....whatever. or just buy a few straight out...

www.jetsrus.com/a_jets_by_carburetor_type/jets_keihin_99101-116_main_round_small_and_38-xxx.htm

[maconboi]

so i have a taotao as well i had already bought another carb becouse the automatic choke never worked right i replaced it with a KEI HIN CVK japanese made carb. that being said i haven't rejetted it what would be the proper jet for it? also i was having problems after long runs on it almost like overheating it would start a rattle type noise and progress to a knock you could stop (engine running) sit for five minutes and it would be fine. so now after reading this post it sounds like overheating from being lean.

[Deleted]

i have seen those 63cc 44mm bore tao motors want anywhere from 80 to 95 on the main.

[maconboi]

thanks for the advice i'm new at the scoot game but cars for 15 years so how do i tell what jet i have now. i need to figure this out becouse i don't want to run it untill i get a better jet. and is that carb i replaced it with a decent one it's japan made so figured it was better along with being able to service it.

[Deleted]

You would drill the headless bowl screws out to get to the jets..but that was one of the reasons for replacing it anyway...because its sealed. Many times the jets are not marked anyway so that is usually wasted effort. Yes Keihin is a very good carb. It comes with an 85 main so on a 63cc that will probably be fine. Put a new plug in then take it out and run it wide open then check the plug you want to see a nice tan color.

I can guarantee you the stock jet was no bigger than 76

[maconboi]

thanks again i'll go grab a new plug today. saw your post for carb jets. in my carb (keihin) i have a longer jet in the middle. and a short jet to the side (when you take them out) like the ones pictured in ur post so i'm assuming the shorter one is the main?? and yes you're correct there not marked. i was thinking of drilling out that stock carb to see what's up with it. just to play with.

[Deleted]

Apr 29, 2012 10:16:10 GMT -5 @maconboi said:

thanks again i'll go grab a new plug today. saw your post for carb jets. in my carb (keihin) i have a longer jet in the middle. and a short jet to the side (when you take them out) like the ones pictured in ur post so i'm assuming the shorter one is the main?? and yes you're correct there not marked. i was thinking of drilling out that stock carb to see what's up with it. just to play with.

wait.

the jets on your OLD carb are usually not marked. the NEW carb...the jets should be marked 85 on the main....33 on the pilot (long)

[maconboi]

humm odd ok well i did look at them. and looked for numbers didn't see anything. guess i can take it off when i do the plug and get a magnifying glass if they were marked it had to be very small.