RB AS Carb - Out of the Box Report
Posted: 02:53 pm Nov 18 2019
Holy Guacamole Batman! My KDX can scream like a banshee.
I might have to change my name to 'Green Rocket'.
Thank you all for the great info on this site.
I received my RB AS, last eve. USPS delivers here on Sunday nights!? (very strange this new world).
I plunked it on, bike fired on 2nd kick. After a little warm up and 1st gear perimeter check in the woods, it went out for a spin on the open road.
Hitting 60 in the pitch black at 9pm on a wet road is probably not the most intellectually appropriate thing to do, but man did it feel good.
Lucky for me I use only the finest in safety gear: Carhart hickory shirt, combat boots, Tusk one-size fits all street legal kit, $25 universal headlight, & the always reliable DOT knobbies. What could possibly go wrong?
The out of the box set up more than fixed what I was hoping it would.
I now have hella top end, that is better than I deserve.
Putting 190lbs on a 200, seemed like a stretch even for a bike with KDX-rep.
Even after 3 months of reading old posts + some pretty good luck keeping with the KTMs in the tight stuff, I still had guarded expectations of what this 'beginner' bike should be able to do on the top end when stet up right.
Wheel lifted in 3 gears..... 3rd was really more of a small boost than a lift. But, I am impressed.
I agree with whoever made comparison description:
RB carb feels kinda like a staggered 2bbl with 2ndary opening after the slide goes past the divider plate.
It seems to absolutely scream below and above the '2ndary line'.
First impression: All you have to do to go like bat out of hell with almost instant throttle response, is pick a gear that doesn't sit on the transition point.
But never having had one of these stock, maybe that is how the OEM carbs feel also. I am not sure I would know the difference between 2T hit and divider plate transition.
My 200 came with very nice but all stock 35mm AS, (MJ-160, PJ-48) that did great things on bottom but would not rev out well, I had to wick wicking it to work it up. Felt like I had to use the throttle to add air rather than gas. The old posts here had convinced I'd need to try an RB at some point, even if I got this one to work well. So, instead of working through the jetting on stock AS, I took a short cut and purchased from Ron so I could spend carb time fine tuning on his, rather than maybe have to do it twice.
I think the extra $125 ($387 was my total) you pay for RB carb seems like quite good deal to get the bore & mod's + baseline jetting that works. Too bad I now have a perfectly good carb I don't need... oh well.
So far, so good....I highly recommend the RB AS.
Next rides, I will work on fine tuning and learning the airscrew tendencies then go hunt the SSS.
Great Stuff! He still has fast TAT.
I am a happy RB customer and will probably have a very nice unmolested 35mm AS for sale soon.
I might have to change my name to 'Green Rocket'.
Thank you all for the great info on this site.
I received my RB AS, last eve. USPS delivers here on Sunday nights!? (very strange this new world).
I plunked it on, bike fired on 2nd kick. After a little warm up and 1st gear perimeter check in the woods, it went out for a spin on the open road.
Hitting 60 in the pitch black at 9pm on a wet road is probably not the most intellectually appropriate thing to do, but man did it feel good.
Lucky for me I use only the finest in safety gear: Carhart hickory shirt, combat boots, Tusk one-size fits all street legal kit, $25 universal headlight, & the always reliable DOT knobbies. What could possibly go wrong?
The out of the box set up more than fixed what I was hoping it would.
I now have hella top end, that is better than I deserve.
Putting 190lbs on a 200, seemed like a stretch even for a bike with KDX-rep.
Even after 3 months of reading old posts + some pretty good luck keeping with the KTMs in the tight stuff, I still had guarded expectations of what this 'beginner' bike should be able to do on the top end when stet up right.
Wheel lifted in 3 gears..... 3rd was really more of a small boost than a lift. But, I am impressed.
I agree with whoever made comparison description:
RB carb feels kinda like a staggered 2bbl with 2ndary opening after the slide goes past the divider plate.
It seems to absolutely scream below and above the '2ndary line'.
First impression: All you have to do to go like bat out of hell with almost instant throttle response, is pick a gear that doesn't sit on the transition point.
But never having had one of these stock, maybe that is how the OEM carbs feel also. I am not sure I would know the difference between 2T hit and divider plate transition.
My 200 came with very nice but all stock 35mm AS, (MJ-160, PJ-48) that did great things on bottom but would not rev out well, I had to wick wicking it to work it up. Felt like I had to use the throttle to add air rather than gas. The old posts here had convinced I'd need to try an RB at some point, even if I got this one to work well. So, instead of working through the jetting on stock AS, I took a short cut and purchased from Ron so I could spend carb time fine tuning on his, rather than maybe have to do it twice.
I think the extra $125 ($387 was my total) you pay for RB carb seems like quite good deal to get the bore & mod's + baseline jetting that works. Too bad I now have a perfectly good carb I don't need... oh well.
So far, so good....I highly recommend the RB AS.
Next rides, I will work on fine tuning and learning the airscrew tendencies then go hunt the SSS.
Great Stuff! He still has fast TAT.
I am a happy RB customer and will probably have a very nice unmolested 35mm AS for sale soon.