ThatsDax rt High Performance Carburetor

Texhun · Mar 29, 2012

The smaller the number the leaner it is. Mine came with the #75 installed and I had to lean it out with a #65 drilled out to #68 to get the best performance out of the carb. I have a #70 in right now but it's guzzling gas out the wazoo, I'll eventually go back to the #68.

BMS420 · Mar 30, 2012

geoldr said:
Yeah it does. I have an RT carb and the SBP throttle. You just have to remove the little hook thing that the cable goes into from the RT carb, and replace it from one with the NT

what's the " hook thing"? are you talking about the slide or the "c" clip?
thanks...

Mobbin'Deep · Mar 31, 2012

I think he's talking about the snout

Rt carbs have a 45* angled snout that the cable slides into, it threads into the top of the carb. thats why you cant use a standard cable, because the inner cable isnt long enough.

Chrisflik · Apr 1, 2012

I'm not one to give up all my tricks.. But there not my tricks anyways..
I stole em' from someone else.. And it looks like the cats out of the bag...
I've been running that carb for quite some time now and it is "the bomb".
I saw someone @ a L.A. ride running the Dellorto. Well the price point was kinda high and I went with the knock off.. Screw it. Never been happier..
Looks good and works even better..
Get yourself some jets and enjoy your M.B... FiNaLLY!!!!!
Oh and a shoty intake. Get one of those..
The intake and knock off carb is still cheaper than a Dellorto. And the price of the Therapist you'll need if your running a CNS. Or the hospital bill when that carb gets you stuck in Gangland!!!
Here's a pic.. It fits quite nice..
Questions?? Hollah @ me!!!
FLIK 1!!! dnut

Rocky_Motor · Apr 2, 2012

That's a gorgeous engine!! bet she runs real nice.

My carb drinks gas like no tomorrow. I put the leanest jet that came with it (70) but I may need to go to 65. His website lists M5 and M6 packs and I'm not sure which work

crazyinsane51 · Apr 7, 2012

If I get this carb for my 2 stroke do I need the throttle cable and what else?

BMS420 · Apr 7, 2012

got My RT from DAX last week... installed a #68 jet and I 4stroke at 29mph. so still running the NT till I get the jetting right suck cause I get more performance out of the the stock NT with low profile air filter... in the stock NT i believe that jet in a #70 crazy..

BMS420 · Apr 7, 2012

BMS420 said:
got My RT from DAX last week... installed a #68 jet and I 4stroke at 29mph. so still running the NT till I get the jetting right suck cause I get more performance out of the the stock NT with low profile air filter... in the stock NT i believe that jet in a #70 crazy..

I really can't wait to see how the RT Carb performs, cause just hit my fastest speed of 38.2mph with the NT Carb. low profile air xct2

filter , expansion chamber, 27t sprocket.. sucks up hills here in Big Island Hawaii but on the flats topping out at 36mph with a wobbly claim shell adapter.... need to do somthing about that...http://motorbicycling.com/images/smilies/xct2.gif

Rocksolidperson · Apr 7, 2012

Nice build dude heres mine, i got the adjustable air fuel mixture screw, the choke is not needed on mine as it has something called a semi strangler starting system, you can also see it running along with the reed valves here : http://www.youtube.com/watch?v=tR4dqSf16xE

BMS420 · Apr 7, 2012

Rocksolidperson said:
Nice build dude heres mine, i got the adjustable air fuel mixture screw, the choke is not needed on mine as it has something called a semi strangler starting system, you can also see it running along with the reed valves here : http://www.youtube.com/watch?v=tR4dqSf16xE

View attachment 46790

View attachment 46791

Wow! nice setup.. I need to get an intake like that I have like no space by the seat post tube.. where you get that intake? if you don't mind

crazyinsane51 · Apr 8, 2012

If I get this carb for my 2 stroke do I need the throttle cable and what else?

Rocksolidperson · Apr 8, 2012

BMS420 said:
Wow! nice setup.. I need to get an intake like that I have like no space by the seat post tube.. where you get that intake? if you don't mind

That intake is actually reed valves what you see is just what the carb clamps on to Rock Solid Engines Australia supply them

Rocky_Motor · Apr 9, 2012

Now that I have gotten to ride my bike more, it's not doing too hot. It runs good, but I have lost a couple of mph. Just doesn't go as fast as it used to. Do you guys think I'm probably just running really rich? I put the 70 jet in but maybe I need to get the other jets to go even lower.

Starts really easy though, I don't even need to bother with the choke most the time. Which I guess suggests I'm running rich

happycheapskate · Apr 10, 2012

Some old 3.5hp briggs motors have a carb that does that. It closes like an old-fashioned ash-tray, till the engine gets going, and the air coming in keeps the choke open.

Rocksolidperson said:
Nice build dude heres mine, i got the adjustable air fuel mixture screw, the choke is not needed on mine as it has something called a semi strangler starting system, you can also see it running along with the reed valves here : http://www.youtube.com/watch?v=tR4dqSf16xE

View attachment 46790

View attachment 46791

GearNut · Apr 10, 2012

Rocky_Motor said:
Now that I have gotten to ride my bike more, it's not doing too hot. It runs good, but I have lost a couple of mph. Just doesn't go as fast as it used to. Do you guys think I'm probably just running really rich? I put the 70 jet in but maybe I need to get the other jets to go even lower.

Starts really easy though, I don't even need to bother with the choke most the time. Which I guess suggests I'm running rich

My guess is yes, you need to re-jet smaller.
The color of the spark plug can help you determine the answer. Do a plug chop at the speed at which you are having the trouble and re-jet accordingly.

RobRoy · Apr 10, 2012

Rocky_Motor said:
Now that I have gotten to ride my bike more, it's not doing too hot. It runs good, but I have lost a couple of mph. Just doesn't go as fast as it used to. Do you guys think I'm probably just running really rich? I put the 70 jet in but maybe I need to get the other jets to go even lower.

Starts really easy though, I don't even need to bother with the choke most the time. Which I guess suggests I'm running rich

I have the 68 in both of my bikes.... I just ordered the 65 jet to see how it does.
If you watch this video, (http://i867.photobucket.com/albums/ab235/robroyscott952/d83b69bd.mp4) I was filming my fiancé riding. The sound you here is my bike running rich with the 68 jet installed. :-||

newbybikelover · Apr 17, 2012

thatsdax RT high perf carburetor. got to say. best part for the bike to buy :] i do not regret one bit of getting it, now to order smaller jets, .70 is still running a bit rich for me. quick question though, anyone know the difference between ordering the M5 and M6 packages from thatsdax?

RobRoy · Apr 17, 2012

This is with the 65 jet.

http://www.youtube.com/watch?v=rFfn8771GEA&feature=youtube_gdata_player

http://www.youtube.com/watch?v=mQCyOiuZnAw&feature=youtube_gdata_player

thatsdax · Apr 17, 2012

Just a tiny bit fat on top.. I would keep that.. This is what you want.. Any leaner and your engine will run hot.. Maybe too hot.. If you have an infa red thermometer, you should have the following ideally, Cylinder head temp 375-385F Degrees F anything over 400 means your motor is burning up. , 2-3 inches from Exhaust ring 1175-1185 is perfect. Enjoy the ride.

thatsdax · Apr 17, 2012

o yea.. And Rob.. Better Marry that girl.. Do not let her get away !! She loves to ride bikes .. She is a keeper !! Enjoy the ride..

ThatsDax rt High Performance Carburetor

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