Tecate carb options-

[3Razors]

No prob. I've used those specs before and found them spot on with just a slight tweak for my elevation. Pay close attention to the needle jet/needle numbers and make sure you use them. I tried that setup with the stock airbox and found it to be not enough airflow without the lid removed.

[dcreel]

Here is the link to the Jimmy White Tecate manual:

http://www.3wheelerworld.com/oldsite...nuals/JWR1.pdf

I printed off a copy for the garage..

[mudbogger]

If you have the 38mm tm mikuni a very easy way to get your jetting in the ballpark would be to look in the jimmy white specs manual. It's listed on this site. Follow it exactly, you will probably have to go smaller on the main jet than is listed though if you are running a stock tecate cylinder and not the kx one he used.

Also where did you get your new 38 tm? Many of them come equipped with the 1.5 needle valve for snowmobile use (fuel pump required), you need the 3.3 needle valve for use or you could be having fuel starvation issues.

Hello and thanks for the help! I purchased the TM off Ebay to be honest.How can I check on the needle valve-are the number listed anywhere for each by chance so I can check?.My carb is no where near these listings at all, the needle I have is the stock 6fj41 series alone-main is a 230-listed is a 360-380 how would you size the differences in the VM mains and the TM MAIN JETS, are they the same exact main jets?

[dcreel]

I'm pretty sure they both use the same main jets. Mine has the 4/042 jets in it. Here is a VM Manual I found.

http://www.mikuni.com/pdf/vmmanual.pdf

[3Razors]

Hello and thanks for the help! I purchased the TM off Ebay to be honest.How can I check on the needle valve-are the number listed anywhere for each by chance so I can check?.My carb is no where near these listings at all, the needle I have is the stock 6fj41 series alone-main is a 230-listed is a 360-380 how would you size the differences in the VM mains and the TM MAIN JETS, are they the same exact main jets?

The needle valve is a brass fitting also called the seat. It is under the float tang. You need to unscrew the phillips screw that holds it in place, get a pair of needle nose pliars and gently pull it out. You will find the numbers on it then.

Yes the TM and VM roundbore carbs use the same large hex type jets.

You can get a 3.3 needle valve for $15 from dennis kirk.com p/n 786-46001-3.3

[mudbogger]

Took the carb apart, mine has a 3.5 throttle valve in it,needle is a 6fj41 on middle groove,389- Q2,270 main jet way off from the JIMMY WHITE SPECS FOR SURE!

[3Razors]

3.5 needle valve is good, keep it. What about the needle jet numbers? Its a long brass tube that goes verticle inside the carb. To get it out take off the main jet and then gently push down on it from from above (where the throttle slide is)

[mudbogger]

389-Q2 it is.Came right out, almost seemed loose, I barely pushed it and it fell out.

Here is a link for parts from JETS-R-US the table of valves is leanerto richer, which way would you go for a purchase?

http://www.jetsrus.com/a_jets_by_car...ets_mikuni.htm

[3Razors]

From the manual it needs a 389-Q6. Good place to call up is carbparts.com and order the needle jet, needle, and any other jets.

Just want to be sure. You said 3.5 throttle valve, did you mean needle valve? The throttle slide has a cutaway that will have numbers on it like 4.0, 3.5, ect. To get the float tang off to get to the need valve you need a small punch with a light tap of the on the pin that holds the tang.

[mudbogger]

From the manual it needs a 389-Q6. Good place to call up is carbparts.com and order the needle jet, needle, and any other jets.

Just want to be sure. You said 3.5 throttle valve, did you mean needle valve? The throttle slide has a cutaway that will have numbers on it like 4.0, 3.5, ect. To get the float tang off to get to the need valve you need a small punch with a light tap of the on the pin that holds the tang.

I apologize, your right!, I tapped the pin out for the brass floats,then removed the float retainer with a phillips head,then the small retainer spring, slid the needle valve out and gently pulled the brass assembly out and on it was the 3.5.Thats what I am was terming the throttle valve.Your right I meant needle valve.The throttle slide(or cut away) is a 4.0 as well my apologies.

[3Razors]

Looks like Jetrus has what you need, cheaper prices too than what I've seen at carbparts.com. Just get exactly what is listed in the Jimmy manual, plus a few sizes down on the main jets.

[dcreel]

[dcreel]

http://www.iwt.com.au/mikunicarb.htm

fig. 3 shows the cutaway

[mudbogger]

PLACED ORDER with jets r us total was 29 bucks,small price to pay for the piece of mind cuase this carn is driving me nuts!

[mudbogger]

Dang, Mudbogger.. There is the part number for the cable too... Thanks 3Razors..

And there is a typo too. Mikuni didn't make a VM38FS. But they did make a TM38FS. So I'm thinking it's a typo..

That cable comes up on a search as a throttle cable for a 84-85 KX250/500 sweet GOT 1 OFF EBAY!