Carburetor I.D....What is it???

[outlawgrafyx]

ok so i have a 1973 yamaha DT3 and ive rebuilt the carburetor. the problem is i have no clue what kind of carburetor it is, i know its a mikuni VM, but thats all. and its been running rich, its not the air fuel mix or idle, but its the jet is too big... i need to know what model the carb is and if anyone knows where i can get jets for my bike, ive looked everywhere and all he jets for the mikuni VM dont look anywhere near what my jet looks like


thanks :coocoo:

 

[JunkmanDT250]

http://www.yamaha-motor.com/sport/parts/home.aspx

 

[pryor]

What size jet do you want to try?

 

[outlawgrafyx]

i think the size i need is 160??? im not sure, i live in arizona so whatever would be good for around here

 

[pryor]

Email me your adress I will send you one.

 

[outlawgrafyx]

pryor,

i sent u an email with my info.
do u think 160 would be fine in arizona, i live in the phoenix area, and i see your in california, i dont think it should be that much of a difference right???

thanks.

do u want me to send a payment of any kind?

 

[pryor]

Don't worry about payment I'm glad to help out when I can. I think a 160 is stock and should be close if your bike is stock, also elevation will effect jetting. I will get one in the mail mon. afternoon.

 

[outlawgrafyx]

Don't worry about payment I'm glad to help out when I can. I think a 160 is stock and should be close if your bike is stock, also elevation will effect jetting. I will get one in the mail mon. afternoon.

if u have any suggestions on what size jet is good for arizona, if u could if its available swich it in place of the 160. the elevation for my city is 1237 feet, if u might be able to figure what size this would be that would be awesome! let me know

 

[JunkmanDT250]

I think its safe to say if pryor says the 160 will work you will be fine.

 

[outlawgrafyx]

yeah but 160 is just the stc one, and im not sure if the one i have is the stock one or a different one, the one have have is pretty damn big, ive never seen a jet that big before

 

[pryor]

I cant tell you the perfect jet for your bike, I would have to try different set ups. Your main jet should be in the side of your floatbowl so you can change it easily. does your jet have a number on it? Have you changed the needle position on the slide? lowering the needle will lean it out until your close to WOT.

 

[outlawgrafyx]

i think the needle position is on its 3rd position from the top.

 

[pryor]

I just had a thought, your carb should have the main jet in the bowl, were your jet would be otherwise will be a brass piece with a place for a Oring that seals into the bowl,this part looks like a big jet. If the O ring is missing or you have the wrong bowl this may be your problem.

 

[outlawgrafyx]

pryor,

i pulled out the main jet and it turns out that it is 160, so is it possible the i could try out a different size? but when i pulled it out it looked clogged so i unclogged it, so that might have been my problem. Ill keep you posted if i turn out to actually need one tough, Thanks for all your help

Danny

 

[outlawgrafyx]

i took out the one out of the side and it said 160. i also have the big one in front of me, ithought that one was the main jet? it takes an oring?? i have the corect bowl.

 

[pryor]

Yes if its the piece that fits into the bowl when you put it together there has to be a Oring around the out side to seal it or it will suck fuel instead and not use the jet . that will make it run real rich if it will run at all.

 

[outlawgrafyx]

yeah when we start it up it runs really freakin rich

 

[outlawgrafyx]

Ok

I Got a bigger problem

the big thing that looks like a jet in th middle of the float bowl that pryor was talking about.

i was screwing it back in and screwd it a little too tight nd it snapped!!!!!

i need one really fast. Pryor i dont know if you have any of those, but i need to find one

yamaha has them fo 15 bucks but thats a little more expensive then what i think i ca get it for.

Any places to go???? Stores????

Junkman, went to that place you emailed me, thats where i got the price info ($15) but im wondering if theres another alternatative???

The part is called the "Needle Jet Setter."

 

[pryor]

You snapped it off? Ill send you one, but go easy its just brass. Maybe you should skip the wheaties :)

 

[outlawgrafyx]

yeah like i was tightening it, and the threads broke off from the main piece. Thanks, im glad wont have to pay for it :) yeah aybe i should lay off those wheaties, or maybe its the roids?? hahaha