Thread: redtop carbs
03-01-2007, 11:18 PM #1
tell me about them. Some digging on the riva site turned up very mixed opinions. some that they are good, great, and then pistonwash saying to throw them in the garbage.
I know I need to read between the lines because alot of the time on that site people were very secretive.
what the dilly?
03-01-2007, 11:48 PM #2
- Join Date
- Apr 2006
- panama city beach 'fl
what you using on ,they flow fair amount of air but lousy signal(eather on or off)
poor mr green came up with idear he died,kevin took it from there,now we have blackjack carbs(allso SRE but they worked, bo knows)
03-02-2007, 06:54 AM #3
Mike Rob Raider used them on his Raider 1100 ,a while back ,he was a Raider guy like us, he ran strong, even in the chop , very cool guy to talk to , I will pm you his number tell him I sent ya........he can explain the jetting and all........
03-02-2007, 07:14 AM #4
Red Top - butterfly diameters 38/44/46 mm - Annular discharge carbs made from a Mikuni Super BN. They employ an integral flame arrestor spigot and are used with integral or remote fuel pumps.
Comparing Signal Statistics - Having made all these different statements about the importance of signal, the next logical thing to do is post the actual signal data (as measured on a flow bench). Nearly each of the aftermarket carb makers produces (and strongly promotes) the 44/46mm butterfly versions of their line. Given this, we considered it most relevant to list the data for these diameters. The only exceptions were the Buckshot BRM (they promote the 47mm instead of a 46mm), and the Keihin 42mm (the 42 is the largest race carb that Keihin makes).
The following data was gathered on a Super Flow 600 flow-bench set at 20 inches of water for all tests.
Along with this data, we have also denoted the full throttle CFM numbers, as measured at 20 inches of water. They are listed in alphabetical order by carburetor brand name.
Carburetor (signal@100%open) Main Circuit Pilot Circuit CFM @ 20" (100%open)
Buckshot Magnum 44 31.0 23.3 268
Keihin CDK II 42*** 28.8 22.5 195
Mikuni Super BN 44*** 49.0 30.0 230
Mikuni "I" Body 44*** 32.2 22.5 239
Novi Max Flow 44 66.0 25.7 269
Red Top 44 37.9 20.3 269
AMC 46 31.7 21.5 293
BMR Full Spectrum 46 58.0 23.0 299
Buckshot BRM 47 41 - 47.5** 20.5 293
Buckshot Magnum 46 37.2 26.0 286
Mikuni Super BN 46*** 46.0 34.8 253
Mikuni "I" Body 46*** 33.0 23.2 246
Novi Max Flow 46 65.0 28.0 304
Red Top 46 34.8 21.0 296
** The signal reading randomly fluctuated on a 2-4 second cycle within this range, with no stabilized 20" reading lasting over 5 seconds. Signal reading would not stabilize until pressure was reduced to 8".
*** Tests were run with bolt-on arrestor adapter.
Somebody mention Jack Green?
03-02-2007, 09:14 AM #5
03-02-2007, 09:18 AM #6
03-02-2007, 09:32 AM #7
I know of a set that seams reasonably priced, but after reading some old posts, and of course the groupK site (wink wink crazy), I am unsure about them. If anything they would go on the gp12 or raider.
I have read that they are a PITA to keep in tune but do perform well.
Just doing my reasearch before I dive in.
03-06-2007, 12:35 AM #8
I've had some experience with them although not as kick ass as Novi's,for the rec riding weekend warrior they are easy to tune very crisp low and mid,no big gain on top.My overall summary is very crisp & responsive through out entire powerband.I had them on a full rec ported 97 gp and they worked great!
Last edited by H204YOU; 03-06-2007 at 12:37 AM.
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