Author Topic: Chapman Automotive drag bike.  (Read 8609 times)

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Offline jweeks

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Re: Chapman Automotive drag bike.
« Reply #25 on: March 03, 2013, 07:19:53 PM »
Wide open throttle and release the left hand lever???? :o :o :o :o :o

                                         Jon Weeks

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Chapman Automotive drag bike.
« Reply #26 on: March 03, 2013, 07:24:39 PM »
Light tha fukn tire up and hold yer ass on! Just don't forget to shift this one Bill  ;D
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #27 on: March 03, 2013, 09:02:47 PM »
Jon you too funny!  Definitely not the first time!!!  ;D Bill
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Offline dragracer

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Re: Chapman Automotive drag bike.
« Reply #28 on: March 04, 2013, 06:15:13 AM »
Wide open throttle and release the left hand lever???? :o :o :o :o :o

                                         Jon Weeks

We need a 2 step installed on the bike. Gotta put the Dyna on there first. Ditch the other ignition- way better stuff out there now that s more tunable and reliable. Just need a battery box if you can find a place to put one with the total loss system. A Ballistic or Anti Gravity battery is very smalll, light weight and fit in just about any location and can be mounted in most any position.

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #29 on: March 04, 2013, 09:32:32 AM »
That would be nice. Not much of a dancer, need help with the two step!!  ;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.
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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 dragracer

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Re: Chapman Automotive drag bike.
« Reply #30 on: March 04, 2013, 02:44:49 PM »
That would be nice. Not much of a dancer, need help with the two step!!  ;D Bill

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Offline Sam Green Racing

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Re: Chapman Automotive drag bike.
« Reply #31 on: March 04, 2013, 08:35:34 PM »
That would be nice. Not much of a dancer, need help with the two step!!  ;D Bill

I can do the Texas 2 step and the 8 step as well, well I could 30 years ago when I lived in Pascagoula. ;D ;D ;D ;D ;D ;D ;D

Sam. ;)
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Offline dragracer

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Re: Chapman Automotive drag bike.
« Reply #32 on: March 04, 2013, 09:22:51 PM »
Bill, no sweat. Got a little box that will solve your starting line issues, DRL400. Time for some horse trading??

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #33 on: March 04, 2013, 10:28:54 PM »
Sounds good...off to bed. ;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.
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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 gschuld

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Re: Chapman Automotive drag bike.
« Reply #34 on: March 05, 2013, 04:34:51 AM »
Wide open throttle and release the left hand lever???? :o :o :o :o :o

                                         Jon Weeks

We need a 2 step installed on the bike. Gotta put the Dyna on there first. Ditch the other ignition- way better stuff out there now that s more tunable and reliable. Just need a battery box if you can find a place to put one with the total loss system. A Ballistic or Anti Gravity battery is very smalll, light weight and fit in just about any location and can be mounted in most any position.

While I fully understand the fact that the ARD magneto ignition system on the bike isn't the most convenient(user friendly) available today, I feel compelled to mention that this is not just any bike.  It's a custom framed vintage 70s lay down drag bike with a racing history.  Personally, I think of it as something of a functioning museum piece.  Bill has every right to do whatever he wants to do to his own bike.  After all, he paid for it! ;).  But look at just about every 70's vintage sohc dragbike, any successful one anyway, and ARD magnetos were on most, if not all of them.  I think that this should at least be taken into consideration.  That magneto screams vintage and authenticity to me on a bike like this.  It would sadden me somewhat to see some of it's vintage character removed.

I confess to be really into period correct parts on certain "important" bikes.  That said, I won't be straddling Bill's dragbike at the starting line and don't have to worry about the safety aspect while I throw my biased opinions out from half way across the country. 

I just want to suggest that the authentic aspect to be kept in mind when...

That's as close as I get to a rant :).  I'm off my soapbox now(running and ducking)  :o

George

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #35 on: March 05, 2013, 05:21:26 AM »
OK,George,funny thing is I feel the same.IF the ARD will co-operate,I have instructions now(Thanks,JimF),so IF it behaves it stays.....if not I'm not chasing my azz trying to fix,however,the gutted one of Jim's still served both purposes,but for now the ARD stays. How long? Time will tell,but oh I too love the look!! 8) So won't give up on it if it doesn't give up on us! ;) ;D 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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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Chapman Automotive drag bike.
« Reply #36 on: March 05, 2013, 11:22:51 AM »
+1

Don't start bastardizing it!  ;)
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #37 on: March 05, 2013, 11:32:36 AM »
Yes Sir,where do I start the "Tiger" fund"? Just kidding,forum's been good to me! 8)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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Offline gschuld

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Re: Chapman Automotive drag bike.
« Reply #38 on: March 05, 2013, 01:26:47 PM »
Bill,

    I'm glad that you feel that way as well.  I have another ARD magneto setup your welcome to borrow for testing purposes.  It's not on a bike right now, so no big deal.  Any chance that you will do any races in the northeast with the "Tiger" at some point?

George

Offline dragracer

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Re: Chapman Automotive drag bike.
« Reply #39 on: March 05, 2013, 01:53:20 PM »
Hey,

I do understand the period correct mindset- if its going to be a show bike or for exhibition passes, I agree the bike should be left alone as is. Yeap, magnetos had their place back in the day, not sure if i know of any dragbikes being built with one on now. I'm certain there's a valid reason for that change.

Since i'm familiar with modern day electronics, my thought pattern was to update the ignition to make the bike more practical and functional as well as rider friendly.

Either way, its a cool 70's dragbike and its an SOHC to top it off. Bill will have fun with it and we'll all get to read about his experiences. Wide the hell open throttle launches here we come.

Bill, be sure to let me know about the size of the outboard starter nut. I might be able to hook you up with something to crank it.

   

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #40 on: March 05, 2013, 02:35:07 PM »
Will do...also have Kenny's slipper clutch? Bike is for exhibition, shows, and for us all to enjoy.Long way down the road it can go in the "Sam Green Museum"!!! Bill But if it ran 9.5s I want to at least be in the 9s!!
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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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Chapman Automotive drag bike.
« Reply #41 on: March 05, 2013, 02:49:36 PM »
Bill,

Just to let you know I could live with the slipper clutch  ;)  If it WAS in the 9.5's why wouldn't it be there as is??!! Rider  ;) ;D ::)



As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline jweeks

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Re: Chapman Automotive drag bike.
« Reply #42 on: March 05, 2013, 03:37:32 PM »
Brass shrinks with age.... ::)

                                       Jon Weeks

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #43 on: March 05, 2013, 05:08:27 PM »
Jerry, you did SAY you wanted to ride it!  Jon's method will work fine for you!! WFO and release left lever.....and remember the sage words of  NitroHunter!!!! ;) ;D 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 dragracer

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Re: Chapman Automotive drag bike.
« Reply #44 on: March 05, 2013, 08:01:17 PM »
Will do...also have Kenny's slipper clutch? Bike is for exhibition, shows, and for us all to enjoy.Long way down the road it can go in the "Sam Green Museum"!!! Bill But if it ran 9.5s I want to at least be in the 9s!!

Bill,
Thanks for clearing up the bikes intended purposes for me. Since i met you guys, the thought pattern has always been on how quick/fast can we go and what improvements can be made to make things better.  I guess i got caught up in ways to make things better overall from a performance point of view. Now that i know its for shows, i'll just follow along and lend a hand if i'm asked.

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #45 on: March 05, 2013, 08:20:06 PM »
Frank, your input and help always welcome.Day may come, we try to get all we can, but for now mainly concentrate on Big Bore Automatic, I want the record!! Will need your help.Thanks 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 dragracer

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Re: Chapman Automotive drag bike.
« Reply #46 on: March 06, 2013, 10:38:42 PM »
Frank, your input and help always welcome.Day may come, we try to get all we can, but for now mainly concentrate on Big Bore Automatic, I want the record!! Will need your help.Thanks Bill

You know i'll always be there to help in any way i can with my limited knowledge. If nothing else i'll always be around to stir the pot. Lol.

Offline Bill/BentON Racing

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Re: Chapman Automotive drag bike.
« Reply #47 on: March 07, 2013, 02:12:38 PM »
Frank, thanks, you've already played a big part in our ongoing saga!! Commerce in 23 days!!! 8)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 754

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Re: Chapman Automotive drag bike.
« Reply #48 on: May 12, 2013, 09:30:24 AM »
I posted a shot of a very similar looking frame with a twin in it, over in other bikes, the LSR Sportster thread
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Re: Chapman Automotive drag bike.
« Reply #49 on: May 15, 2013, 08:53:05 PM »
Bill, have you put the new pipes on it yet from our fellow forum member??? Are you going to attempt to start it anytime soon??