Author Topic: CB750A Street ET bracket drag bike. A year to build it.  (Read 621717 times)

0 Members and 2 Guests are viewing this topic.

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,123
  • CB750F Dragbike
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #925 on: March 31, 2011, 11:17:44 AM »
HaHa,no Christmas cards from Boo for me or you!!! ;) ;D ;D ;D
Jon,Sam,someone post it please 8)Bill
Voodooracer will ride again! :)

Let me know how we can get together to make something happen for Voodoo. Sounds like you've got something up your sleeve my friend- i'm in!!!.

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #926 on: March 31, 2011, 12:39:31 PM »
Now how can we post that run on the psychobike website for Boo Brown to see???

Oh sugar :o    http://www.psychobike.com/forums/et-racing/75750-run-pro-et-3.html#post743906


Sam. ;)
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 Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,725
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #927 on: March 31, 2011, 12:46:11 PM »
Well,I do have a spare auto.You up to the challenge Keith? Make a helluva bracket racer someone said! ;)Come get it,it's yours!,Might have some larger pistons also.Samauto II  ;D ;D,Come on,the answer better be yes.Gotta enough other stuff,time for you and Frank make roadtrip!!!.What you might do intrigues me!! ;D,Bill
Papa Sam said you better also. ;)We ain't taking no,you don't come we 'll bring it to Carolina Dragway! ;D ;D ;D ;D
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
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.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #928 on: March 31, 2011, 03:05:44 PM »
Hey Billy, Frankie is over on psychobike stiring up trouble :D :D :D and I've been helping him. ;D

Sam. ;)
« Last Edit: March 31, 2011, 03:07:16 PM by SamCB750A »
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 Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,725
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #929 on: March 31, 2011, 03:14:35 PM »
K.Trouble ? Team Sam Green? ;) :D :D :D,Bill
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
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.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #930 on: March 31, 2011, 03:27:04 PM »
Bed time, nite all. 8)

Sam. :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 dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,123
  • CB750F Dragbike
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #931 on: March 31, 2011, 03:29:18 PM »
Hey Billy, Frankie is over on psychobike stiring up trouble :D :D :D and I've been helping him. ;D

Sam. ;)

And if i recall, it was Mr. Bill that got us started in the introductory section of the site. Lets see whats the phrase the old southerners used?: "throw the ball, hide the hand". Lol

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,919
  • Bought her new 4/75
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #932 on: March 31, 2011, 10:22:09 PM »
Don't suppose you boys would want to borrow my NOS 1080 top end I have sitting in the basement? Cylinders bored and ready. I think that white jump suit Sam wears would have a brown racing stripe on the back  ;D

From the left 736 61mm, 812 64mm, 900 67mm, then 1080 73.25mm. My 1000 piston didn't make the picture.  ;)

« Last Edit: March 31, 2011, 10:38:52 PM by Jerry Rxman Griffin »
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #933 on: April 01, 2011, 03:53:57 AM »
Hey Billy, Frankie is over on psychobike stiring up trouble :D :D :D and I've been helping him. ;D

Sam. ;)

And if i recall, it was Mr. Bill that got us started in the introductory section of the site. Lets see whats the phrase the old southerners used?: "throw the ball, hide the hand". Lol

 ;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

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #934 on: April 01, 2011, 03:55:55 AM »
Don't suppose you boys would want to borrow my NOS 1080 top end I have sitting in the basement? Cylinders bored and ready. I think that white jump suit Sam wears would have a brown racing stripe on the back  ;D

From the left 736 61mm, 812 64mm, 900 67mm, then 1080 73.25mm. My 1000 piston didn't make the picture.  ;)



I think it would take more than an extra few CCs to make me poo Jerry. ;D ;D ;D

Sam.
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

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #935 on: April 01, 2011, 04:02:23 AM »
Billy and Jim, would it be possible to take your laptop to the Dyno in the morning and set it up on Skype so we can have a live stream as it happens ?  8)

Sam. ;)
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 Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,725
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #936 on: April 01, 2011, 05:07:40 AM »
Damn,that would/will COST you!! ;) ;D ;D ;D ;D
Too much technology !!!
We'll try........the Bill and Jim show starring Brian on dyno! ;D
And the HP will be????????? ;D ;D
Still got to get mains,not in yesterday and change gearing.
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
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.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #937 on: April 01, 2011, 05:25:17 AM »
I would leave as is on the mains Billy, and the gearing won't make any difference on the dyno results so don't panic. ;D ;D ;D ;D

Sam. ;)
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 Jim F

  • Need a bigger house for more toys
  • Master
  • *****
  • Posts: 1,887
  • go baby go
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #938 on: April 01, 2011, 01:46:15 PM »
will be bringing everything to the dyno but the kitchen sink

jets are still not in nor is the chain for gearing

everything is good so not too worry

plenty of time



2002 RC51 1000 (SP2)
1983 GS1100EC Suzuki
2002 998 Dukati (Customers Bike)
1992 KTM500 2 stroke
1975 CB750/836 Honda
1978 GS750/840 Suzuki

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,123
  • CB750F Dragbike
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #939 on: April 01, 2011, 02:19:35 PM »
How high did you guys ever get it to stall anyway?. I forgot to ask.

And don't forget the weaker diaphram springs- ooops, did i say that already? Big cam, not enough low rpm vaccum=weaker springs.  :-\

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #940 on: April 01, 2011, 02:56:49 PM »
Frank, or John,  :D  It was stalling at 2,800 before we altered the timing curve. It went faster with the correction of the curve but dropped the stall speed to 2,500rpm. It should be up around 4,500 to 4,800 I think, JW will give you the exact rpms.

Sam. ;)
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 Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,725
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #941 on: April 01, 2011, 03:03:15 PM »
Frank,2600-2800 rpm's.Slooooooooooooow 60 ft. times.My best,last run,2.391,Sam's best,2.316!!! :o :-[
My best reaction,.029,Sam's,.014!.............He's slowing down? I don't think so!
We'll get it,stock stall should be @ 3000rpm. ???
When it gets @ 3500-4000rpms watch out! ;D ;D,Bill
Will someone also post 2nd round loss on www.psychobike.com
I'm sure the other rider T-Bone would appreciate it.Thanks,Bill
Frank,keep working on Keith! ;) Bill
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
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.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #942 on: April 01, 2011, 03:34:01 PM »
I wonder what sort of power I make at 10,000 POSTS ::)

Sam. :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 benly- ben

  • Hot Shot
  • ***
  • Posts: 447
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #943 on: April 01, 2011, 03:35:00 PM »
I wonder what sort of power I make at 10,000 POSTS ::)

Sam. :D
congrats!! ;)
"Youngest Member On The Forum! Joined When I Was 12!"

Offline Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,725
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #944 on: April 01, 2011, 03:47:03 PM »
WOW!!!!!!!!!!!!!!!!!!!!!!!! ;D ;D ;D ;D ;D ;D,Bill
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
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.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #945 on: April 01, 2011, 04:20:13 PM »
Your only nearly 9000 behind. ;D ;D ;D ;D ;D get your butt into gear Mr Benton.  :D
The last few weeks have been something of a miletstone.
The Samauto taking to the track after 15 months of painstaking work by a dedicated crew and helpers.
This thread recording 1,000 post and pushing 27,000 views.
Me reaching 10,000 posts and I've just been informed by Benly Ben, one of the teams junior riders that he has nominated Samauto for bike of the Month, thanks Benny, you should be in bed at this time. ;D
A great big thanks to you all for putting up with me for so long, buy yourself a nice long drink on me. ;D ;D ;D

Sam. ;) off to bed, good luck on the dyno guys. 8)
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 jweeks

  • Hot Shot
  • ***
  • Posts: 545
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #946 on: April 01, 2011, 05:09:39 PM »
     How high the motor will rev on the starting line is a direct function of how much torque the motor makes in the rpm range in question. I've never got any of my combinations over 4,200 rpm (1080 cc motor with small cam) More torque around 3 grand for this bike and it will really wake up.  I don't think that the 836 motor has the power to make 4 grand. I'm guessing  high 3k launches with everything right. We have to have consistent 60' times to have an ATM. Right now we have a top end bike that will give grey hairs to anyone who has to give it a dial-in.  It will be nice to know where our challenges are tomorrow.
     Got a foot of snow today. It's hard to be thinking of racing with a shovel in your hands....

                                                                             JW

Offline scottly

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,301
  • Humboldt, AZ
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #947 on: April 01, 2011, 06:44:49 PM »
Frank,2600-2800 rpm's.
So the higher stall speed was with curve #1, correct?
« Last Edit: April 01, 2011, 06:46:56 PM by scottly »
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline Tintop

  • Old Timer
  • ******
  • Posts: 3,965
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #948 on: April 01, 2011, 07:44:00 PM »
Your only nearly 9000 behind. ;D ;D ;D ;D ;D get your butt into gear Mr Benton.  :D
The last few weeks have been something of a miletstone.
The Samauto taking to the track after 15 months of painstaking work by a dedicated crew and helpers.
This thread recording 1,000 post and pushing 27,000 views.
Me reaching 10,000 posts and I've just been informed by Benly Ben, one of the teams junior riders that he has nominated Samauto for bike of the Month, thanks Benny, you should be in bed at this time. ;D
A great big thanks to you all for putting up with me for so long, buy yourself a nice long drink on me. ;D ;D ;D

Sam. ;) off to bed, good luck on the dyno guys. 8)

The nom has a 2nd as well.  Great bike.
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: CB750A Street ET bracket drag bike. A year to build it.
« Reply #949 on: April 02, 2011, 02:11:30 AM »
     How high the motor will rev on the starting line is a direct function of how much torque the motor makes in the rpm range in question. I've never got any of my combinations over 4,200 rpm (1080 cc motor with small cam) More torque around 3 grand for this bike and it will really wake up.  I don't think that the 836 motor has the power to make 4 grand. I'm guessing  high 3k launches with everything right. We have to have consistent 60' times to have an ATM. Right now we have a top end bike that will give grey hairs to anyone who has to give it a dial-in.  It will be nice to know where our challenges are tomorrow.
     Got a foot of snow today. It's hard to be thinking of racing with a shovel in your hands....

                                                                             JW

Have you ever thought about moving south young Jonny ;D ;D ;D
Thanks for the info and stay tuned to the thread this morning, Billy and Jim are going to try to set up a link from the dyno useing Skype, If they can pull it off, you'll be able to speak to them as the bike performs. (might be a bit noisy though) or you all have your cell numbers.

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