Why do many 620 RXC owners replace the Edelbrock for the FCR or other carbs? :excuseme:

As far as i know the 620 has Dellorto carb , fcr is a way better carb and you can find many parts easy and many set ups .

I think 1996-1999 RXC's in the USA had the Edelbrock Quicksilver carb. My old
1998 RXC 400 had one. I replaced it with an FCR because I couldn't get the Edelbrock to run right. With the edelbrock, the bike was hard starting, fouled many plugs, off idle stalls etc. I could go on and on. Once the FCR was installed, the bike ran like a top and ripped.

Nice , i didn't knew this! I thought the older models came only with the Del'orto carb .
FCR rules!

The KTM RXCe400/620's in '97 and '98 had e-start and the E'brock carbs on them. Before '97 they had the Del's on them. In '99 they went to the BST40 Mik. I've owned 4 lc4s, one 400, still have it, 2 620's and a 640, all sold. The 640 had the BST. I put BST's on all the rest. I was able to get the E-brock to run really well on one 620, reasonably well on the 400, and not worth a damn on the other 620. All of them had the comp vent upgrade and accel pump added. With these mods, the carb wasn't "bad". You can buy used BST40's off e-bay all day long for about $100.00 which is a good deal. I had to have cables made for them by Motion Pro but that wasn't a big deal. The FCR is a better performer but a used Mik is a bargain and solves most all of the E-Brock driveability problems.

-Harvey
#1017
'05 FLTRI
'89 FXRS
'06 300XCW
'98 RXCe400

Terry said:

Thanks, Good info. Was looking to buy a 98RXC620, noticed bike was a little hard starting and bike not so smooth...probably the Edlebrock carb. I have no issues with the BST. I remember folks on TT (maybe DB too)complaining about the 2003 SXC620 because of the BST versus the 2004 SXC with the FCR. I have rode both years and the bikes behaved very well.

As an FYI, my last RXCe620 had a BST on it and iwas dialed in REAL good. I probably shouldbn't have sold that bike. I'm sure an FCR would have produced a little more power, but for driveability and gas mileage, you cou;dn't beat the BST. it had nice crisp throttle response too.

-TF

Was that the bst 40?

I bought my 97 620RXC(3000 miles MINT!) NOT running with the edelbrock carb on it. Previous owner got fed up screwing with the carb ALL the time. I never even took the time to get her going with the edelbrock. I immediately put a 41mm FCR on it and it runs like a top. I let the previous owner take it for a spin and he said it was a whole different bike. :thumbsup:
I also threw 17" rims on her and tarded it. By FAR the most fun on-road bike I've ever owned.:banana: Can't stop laughing out loud in my helmet. :lol:

What cables are required to fit a bst40. I have a dellorto and it's running ok ish but incase I can't get it to run right with aftermarket can I might out some money into a mikuni

the 96 RXC also came with the E'brock carb. Cold start with the E'brock carb and no magic button will drive you nuts.

The FCR on the other hand is a 2 kick.

Less problems and more of the good fun stuff.

Any one want a E'brock carb ?