Author Topic: CB750A Street ET bracket drag bike. A year to build it.  (Read 618225 times)

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Offline 754

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #300 on: January 12, 2011, 08:19:08 AM »
 I think that brace looked a bit out of place, I prefer the style with 2 bars, and side plates, with or without fender. Brace is sure handy when unloading bike, and for hoisting up ther front end, or lifting front to get blocks under to work on bike..
Maker of the WELDLESS 750 Frame Kit
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My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Bill/BentON Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #301 on: January 12, 2011, 08:38:00 AM »
Frank,me too.That's whats on RR bike,Telefix.Bill
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
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1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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Offline jweeks

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #302 on: January 12, 2011, 08:42:18 AM »
Just about every Yamaha dealer stocks it in my part of the country. Was 20W-40, last year became 20W-50. I have one case of the good old stuff for my bikes. I've run everything through my bikes. That's the best stuff. Synthetics slow down the bike. Blends slow down the bike. Mineral based oils aren't equal in how they handle heat. This is the most stable stuff I could find. Yes, I've tried the automotive stuff; Castrol, etc. Vic Force is using the Yamalube in his twin cylinder Hondamatic. (record holder for twin Hondamatics)

     Wasn't there an ad on Dragbike.com for full leathers fairly inexpensive from a sponsor just before Christmas? I don't think that white leather was an option though....

                                                         Hondamatic   ;)

Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #303 on: January 12, 2011, 09:06:33 AM »
I did spot 20W 50 Jon, is that the nearest thing?

How close is this to the real thing? http://www.racewindsor.com/Trees/sportsman.html

Sam. ;)
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JMR Racing CB750A street ET drag bike

Offline Bill/BentON Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #304 on: January 12, 2011, 10:13:51 AM »
Sam my bud @ Yamaha shop will get us a case,cost +10%. ;D Bill
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #305 on: January 12, 2011, 11:48:22 AM »
Sam my bud @ Yamaha shop will get us a case,cost +10%. ;D Bill

That's great Billy, I did see some on the net but it wern't local to you.

Sam. ;)
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Offline jweeks

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #306 on: January 12, 2011, 05:32:47 PM »
Sam,
     Within the same zip code, but far from reality. Remember when practicing, you don't race every 30 seconds! Try it once every 20 minutes and you'll get into a more real mindset. Consistency is the goal. Record your reactions to see how consistent you are. Initially, you will get quicker, but you will level off. We can move the bike around on the starting line to change the time slip reaction times. Remember that your reactions have to be added to the bike's reaction time to get what prints out on your time slip. You don't want to vary your reactions. See the last yellow - react. If your time slip reaction time is too slow, we can change the bike's reaction to shorten that part so that the time slip looks better. You'll also learn about anticipation. That causes red lights.
     Yes, 20W-50 Yamalube will do fine. You should see me on the 18th pm. I am certifiable!

                                                             Jon Weeks  :D

Offline popslady

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HEY CHAD = IT'S POPS
« Reply #307 on: January 16, 2011, 01:52:06 AM »
CHAD: BIG SMILE, I have been trying for a week to get my username and password from this site = their emails were no help to get me back on here = this is my girlfriends site. Send them HONDAMATIC racer over to my home track NATIONAL TRAILS, COLUMBUS, OHIO to help me race them " POWER BY SAUER" KZ bad boyz with boxes,sliders,bars and throttle stops = you know them all !!! Was sick with eye problem in 09 so I stayed home racing in 2010. Seen on DRAGBIKE.COM on July 1-2-3  2011 at IRP they will have a race with AMA PRO-STAR rules of 18.99 or quicker, so let's go beat on BUSAS,1000, 12-14 Teens and BMW'S. You start at one end on the "ATM" and I'll start at the back on the "TURTLE" [ CM400A 17.77ET,74MPH with .5005-.510 lights ] and we will meet in the finals for a "HONDAMATIC SHOW" maybe the "WORM" VIC FORCE could come from NC and we could make it a old IDBA RACE from the past. Will have my 750CC bike done but want to meet the fellow with the 10 second 750, I'll drive to his shop with stator for his fix and a talk about his 34mm carb set up on 750's. I'm 69 years old this year and will not miss one race this year except when I'm in California racing one of my sons Drag bikes.
Indy could be a reunion of the racers from our IDBA DAYZ of a great day at the track = I'll bring the NTR GANG.
Richard "POPS" Luzader  ST/BK 911 NHRA

Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #308 on: January 16, 2011, 09:13:06 AM »
Hi Richard, welcome to sohc4, hurry up and get your 750 up and running and become a proper member. 8)
No real posting restrictions on here as long as you post in the right section/forum.
Chad don't visit here much Pop, just Jon Weeks (Hondamatic) and myself. If we could get Chad on more and Vic as well, we could have all the hated matics in one spot. ;D ;D ;D
I tried to enter SET at the first Mirock event but they have banned automatics and the bike isn't even running yet, they really do hate us :D :D :D :D :D Jason said if we want to race, we will have to run in Pro ET. >:( (big sissies) :D
Hope to meet up with you one day. ;)

Sam. ;)
C95 sprint bike.
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JMR Racing CB750A street ET drag bike

Offline jweeks

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #309 on: January 16, 2011, 01:24:34 PM »
For Pops and the others reading this forum -
     The carbs on Sam's bike started as GSXR 34mm OEM CV units. You add a Dynajet stage 3 jetting kit to get them working well on your cb750's. The bore spacing is too wide, so you disassemble them to allow machining on the carb bodies to allow the linkages to be brought closer together. Reweld the angle iron mounting pieces to reflect the closer spacing. The biggest challenge is the center linkage where the carb cables go. I ended up just using one cable (pull) with an added spring from the linkage arm to an available hole on the block to ensure that the carbs close quickly when you come off of the gas. You end up with near stock jetting*. If you get the jetting right, when it gets colder than normal, you slow down.(too lean) Most people leave the jetting richer to prevent the need for rejetting to conditions.
     *Racers use electronic gauges that take in the temperature, humidity, and barometric pressure readings. That information is converted over to a density altitude reading (in feet above/below sea level) As everyone knows, the higher you go, the less dense the air is. The density altitude value is the theoretical distance above sea level that you are if it were standard temperature, humidity, and barometric pressure. To over simplify, the bigger the number, the less air is available to mix with the gas to form combustion. Since you want a set air to fuel ratio for maximum power, the higher the density altitude, the smaller the main jet you want to run.  So, if you run your bike in Denver, Colorado (which is about 5,000' above sea level) you will use a smaller main jet than you would at sea level. You can see 2,000' changes in density altitude on a day that starts cool and gets warm in the afternoon. I'm not going to get into how water grains can displace oxygen molecules, altering your jetting changes. Most racers know all this stuff, but a lot of bracket racers just jet the bike rich and leave it there. I set up the carb jetting for about a 2,000' density altitude, which is roughly correct for the southern drag strips that Sam is running this spring. You jetting will change, depending on what the density altitude is where you race. A good test of your carbs setup is to run a gear from say 1,500 rpm to redline with the throttle wide open. If the bike doesn't cough, spit back, or stop accelerating at any rpm, you've got the jetting in the right ballpark. Sam can launch  his bike in high gear and run it down the track without any problems. Adapting carbs from one bike to the next can be very challenging. Milder street bikes can use the Seca 32mm oem carbs that I'm told are a bolt-in. I haven't personally tried that yet, but have read of others who have used them. They fit the stock intake rubber manifolds. The 34mm CV carbs work better with aftermarket intake boots. There's a guy periodically on Ebay with aftermarket "K" head intake manifolds from Germany. They are the ones that I prefer. (also cheaper than the OEM ones that are getting pricey)
     I've offered to help Pops and any other Hondamatic racer. I started running Hondamatics in 1985 in bracket racing after losing to one in 1984. There still is nothing better out there for bracket racing. That's why they are so universally disliked. Richard has too many stories of how Hondamatics are discriminated against at various tracks in the US. I've had my Hondamatics banned at my local track for the last 7 years. Why? Because I won too much. They are afraid that I'll discourage competition! I'm still watching the Dragbike.com forums and this one. There are so many helpful people here for people to use. I'm thankful to Sam and others who let me post here!

                                                              Jon Weeks

Offline bwaller

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #310 on: January 16, 2011, 02:22:32 PM »
Interesting stuff Jon et al.

Keep it coming fellas, I'm enjoying your progress Sam.


Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #311 on: January 16, 2011, 03:28:03 PM »
Quote JWEEKS,
I'm thankful to Sam and others who let me post here!

                                                              Jon Weeks.

What a load of bollocks/bull $hit, there's only one person on here that is thankful and that is me for knowing you Jon.
A few years back, Mark (Dusterdude on here) invited me to ride his bike in an ET bracket race at Piedmont.
This type of competition was new to me and I went out in the first round but I was taken by the Idea.
I did a search for video footage of racing at Piedmont and found this Guy Chad Islely giving every one a good work over on  his CB750 auto. I thought if I was going to get involved, this was the route I was going to take.
The bike is now allmost ready to race, thanks to Mike Rieck (JMR Racing), Rick Stetson (Harrys Machined Parts), parts from Orient Express and APE, and Billy Benton (Bent on Racing) who is putting the final touches to the bike.
The real technical stuff in relation to the bike being an automatic came from Mr Weeks who has offered help with back up in exchange for just Data, even to the extent of flying over a thousand miles just to be there to help at the bikes first outing.
Jon is a Hondamatic nut through and through and lives and breaths this type of bike, I just hope that Billy and myself can provide him with the results he deserves, here's to a good season guys, thank's to all involved 8)

Sam. ;)
 
C95 sprint bike.
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JMR Racing CB750A street ET drag bike

Offline popslady

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GOT A SHOP FULL OF RUNNING HONDAMATIC'S
« Reply #312 on: January 17, 2011, 04:19:19 AM »
SAM: I got five 750 CB750A'S,  two CM450A'S , and three CM400A'S and they all are running =  CM400A has 268 passes on the 1320' and my 1976 one owner CB750A with 14,000 miles sitting in a heated trucking garage her whole life in 100% OEM shape untouched got me a $10K offer for her at the " LAST HONDA HOOT " in Marysville, Ohio the factory.
A 53' trailer with 20 years of KZ motor ,parts and bikes = soon to be gone. I do my own porting ,valve jobs,cam grinding, painting and any part repair.  If you want a line lock MATIC get a rear wheel and swing arm [ $100 ebay ] from a 750SS install then run a 34" hydraulic SS line from ["ED'S" ] and run it to the left front handle bar , to a GOLDWING hydraulic clutch lever [ $30 ebay ], hook up and bleed line and you got a line lock = pull in clutch now rear brake lever , screw open the throttle all the way to the stall [ full open] wait for the last yellow shallow staged and let go = .5005 to .520.  er er er you just rode a BUSA with a slider that runs 8.05 ET all motor or my CM400A that runs 17.77 ET and remember the 400M has the rear brake lock already on the left handle bar.
Mr. HONDAMATIC: I missed stated in my other post about your help need with a STATOR what I need is a CONVERTER job by your skilled hands. Do-not need speed as I bracket race and I do have 4 weather stations, a DATA LOGGER, wind sock , and a DIAL IN PREDICTOR like I got the grains covered. When you have 400-450A's it is allways stators that kill you dead in the water. Worked on a PRO-STOCK bike that won the NATIONAL CHAMPIONSHIP at PRO-STAR AMA, fastest all motor BUSA 68"  8.05 ET, fastest SUPERCHARGED BUSA on ALKY 72" , fastest Suzuki 1000 class until caught   cheating, 600 class on and on. What SECA YAMAHA carbs do I need for a easy fit [ year and cc ] I got the special boots from SUDCO as my friend works at the business, do-not need speed just the same ET from 9.00AM till 11.00 PM for my 1=2=3 dayz at the track.

POPS BK911 NHRA
614-875-9591  SHOP

Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #313 on: January 17, 2011, 07:58:56 AM »
Richard, are you trying to corner the market for automatics ;D ;D ;D ;D
If you look back a few pages at some of the pictures you'll notice that the bike has been converted to a rear twin caliper disc, with a Busa clutch master cylinder to operate it. ;)

Sam. ;)
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JMR Racing CB750A street ET drag bike

Offline popslady

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To much weight to spin
« Reply #314 on: January 18, 2011, 03:08:30 AM »
Those twin calipers disc weight to much spinning = fix = single drilled , hidden three step w/ a three way switch off and on switch , one step for burn out, second step from GOLDWING switch clutch lever now rear brake, third step rev limiter.  Shallow stage, set rear brake hard= now on the two step, roll the throttle all the way open [ you will hear her talking to you ] let the brake go or [use a air clutch and button] and off you go. I run a shift linkage to the rear peg mount and shift at 7,000 rpm's [ shift light ] laying low on the tank, under the fairing, glued to the body. FIX = HOOK A SHIFT NOID to the shift lever and you can ride a POWERGLIDE down the 1320' just like the car guys. Get on UTUBE under  THE WORLDS SLOWEST STREET BIKE that other guy won by .003 = I can't win them all on the " TURTLE". Before you ask, front fixture is 6" to center off the ground same as the 1320' sensor at the big end. Better not judge your run against me by my front wheel = you will lose by 8".  Got to have the edge when your slow and old. 1942 me 1981 the "TURTLE".

POPS BK911 ST/ET NHRA

Offline bear

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #315 on: January 18, 2011, 04:30:12 AM »
OK
Educate me.
The basic premise to "Racing" is winning ie being the fastest bloke out there.
I have no idea about drag racing, but in this case are you talking about the bloke that is the most consistent wins?

Cheers,
Brian
The older I get the faster I was.

Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #316 on: January 18, 2011, 04:47:44 AM »
Not every time Brian, you still have to read/antisipate the starting lights, it can be won or lost on the start line.
In a heads up drag race, both riders get the green light at the same time, first across the line wins.
In dial in ET racing, both riders stipulate what time they will run. Let's say Richard dials 18 seconds dead and the rider of a much faster Busa dials 9 seconds, Richard would then get 9 seconds start over the Busa.
Whoever crosses the line first wins providing you don't run faster than the time that you dialed in.
If you do run faster, you knock yourself out. If both run faster (called breaking out) the one who breaks out the least wins. Simple really ::)

Sam. ;)
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JMR Racing CB750A street ET drag bike

Offline lordmoonpie

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #317 on: January 18, 2011, 05:04:23 AM »
Now call me picky Sam, although this thread is really great reading, hasn't the build taken 14 months so far? What happened to a year to build it? Is it all as a result of your dodgy suppliers you're using ;D
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Offline Bill/BentON Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #318 on: January 18, 2011, 06:26:32 AM »
Update tonight!Bill ;)
BentON Racing Website
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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See our latest build 'Captain Marvel' CLICK HERE

Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #319 on: January 18, 2011, 06:29:43 AM »
Now call me picky Sam,

OK picky Sam, the idea was to have it ready for the AMA finals in November, just 12 months since I blasted it down the Valdosta 1320 in a scintillating 18.245 seconds. ;D ;D ;D ;D
When the organisation pulled the plug on the series back in June, I told Mike there was no rush as the bike would not be out until March 2011. Are there any more silly questions you would like answered while I am in a good mood. ::)

Sam. ;) ;D ;D ;D ;D ;D ;D ;D ;D
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #320 on: January 18, 2011, 06:31:41 AM »
Update tonight!Bill ;)

Thanks Billy, I'll stay up as long as I can. ;)

Sam. ;)
C95 sprint bike.
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JMR Racing CB750A street ET drag bike

Offline Sam Green Racing

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Re: To much weight to spin
« Reply #321 on: January 18, 2011, 07:23:25 AM »
Those twin calipers disc weight to much spinning = fix = single drilled

POPS BK911 ST/ET NHRA

Richard, why worry about weight on an ET bike, I'm more concerned that it don't creep forward once staged and the throttle is snapped open, it has to hold 108cbhp.

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
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JMR Racing CB750A street ET drag bike

Offline lordmoonpie

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #322 on: January 18, 2011, 07:55:08 AM »
Are there any more silly questions you would like answered while I am in a good mood. ::)

Sam. ;) ;D ;D ;D ;D ;D ;D ;D ;D
LOL! ;D
No thanks - I'll quit while I'm ahead
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Offline Sam Green Racing

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #323 on: January 18, 2011, 08:04:04 AM »
What makes you think you're ahead :D :D :D :D :D even Malc thinks you're behind ::)

Sam. ::)
« Last Edit: January 18, 2011, 03:04:08 PM by SamCB750A »
C95 sprint bike.
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JMR Racing CB750A street ET drag bike

Offline jweeks

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Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #324 on: January 18, 2011, 04:10:25 PM »
Pops,
     Neal Chance Transmissions, www.nealtrans.com is where I got the converter reworked for my 750A. On a mild motor, it would allow a 4,200 rpm launch. They also reworked my unit later, welding in aluminum fins to replace the stock cast ones. My 10 second bike leaves the line at 6,000 rpm with that configuration. If they won't do your unit, private message me here.
     I'd appreciate someone else's help on the Sega CV carbs. I'm thinking 650 cc version came with 32 mm CV carbs. Online michrofiche should tell you if my memory is correct

                                                     HONDAMATIC  :)