Author Topic: Has anyone heard from Bill Benton today? No, he was out buying a SOHC4 DRAGSTER!  (Read 22486 times)

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Offline Stev-o

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How do the inside of the float bowls look? Any idea of when last run??
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline gschuld

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Someone gave those ports some love! ;)  NICE!  If you get a chance, could you do a quick measurement on the total throat height on those K0 carbs.  Maybe even a pic or two since you have them out.  I have to assume that these are bored carbs.  I'm curious what was done to them.  Hopefully you will have something to compare them too soon. (I haven't heard from Pops 911 yet). 

Naturally we expect video confirmation of the Tiger running ;D.  Anyone else think it will be on the noisy side?

George
« Last Edit: March 16, 2013, 05:10:08 AM by gschuld »

Offline Jerry Rxman Griffin aka MuthaF'er

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I wouldn't call that noise - music perhaps. It's gonna be a singin sonna#$%*!
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Old Scrambler

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Bill is having fun..............I can hear every click of the torque wrench 8) 8) 8) 8)
Dennis in Wisconsin
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Offline Bill/BentON Racing

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Well,wrenchin @ least!......why you don't "just crank em up!!"

135 mains,45 pilots,not bored out.They'll be OK! Bill
Yep,don't need this!

69 carbs!!

They needed a bubble bath!!

Better check that fuel tank!! ;) ;D
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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 brandEn

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What are you soaking them in Bill? Are those carbs bored out?

Offline Bill/BentON Racing

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Yamaha 's carh dip, mix with water. Awesome stuff. The only way to go with a liquid cleaner. Bill
Will check tomorrow, didn't think so, I'll measure,
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Offline MRieck

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Yamaha 's carh dip, mix with water. Awesome stuff. The only way to go with a liquid cleaner. Bill
Will check tomorrow, didn't think so, I'll measure,
Yes...absolutely. I have said it many times.
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Offline Bill/BentON Racing

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Yep, meant to say that, don't believe me , ask Mike! !! lol.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 BLUE71TURBO

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 So what is the bore diameter of the carbs ???   ::)    lol  ;D
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Offline gschuld

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Bill,

     Did you receive any paperwork documenting the racing history other than it's PA ownership and northeast racing?  Any record of times the bike ran? 

George


Offline Bill/BentON Racing

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Funny you ask. Just today I sent Eraldo Ferracci, yes that Eraldo  ;D.Sent him pics and request for information. He's still in PA, so good chance we find something out. Anybody with any info on bike or former owner Keith Robinson also of PA. please let me know.Much appreciated. Thanks 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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Bill,

   So do you have any plans yet as to where you intent to run the Tiger?  Besides locally that is?  Are there some vintage events you would like to go to? 

What events are out there appropriate for vintage lay down dragsters? 

Do we know where Russ Jr. plans to run the triple when up and running?

Any other RC motored or vintage RC dragsters or other cb750 based dragsters out there about there able to join in?

George

Offline HOSA

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If ever down this direction I will arrange to be there. I can not ride but I am sure someone else could :o
OK Bill??
Doug

Offline Sam Green Racing

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I know a person that would if Billy declines.  ;)
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Offline gschuld

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Bill,

     When you get a chance, would you mind measuring your fork tubes.  I'm guessing that they are the cb175/cb200 31mm tubes, rather than the also common cb100/cb125 27mm tubes.  Also have you weighted the complete bike yet?  I'd be very curious to know.  I imagine that you have far more important things to do, like see what's doing on under that cam cover ;), but when you get a chance...

George


Offline Bill/BentON Racing

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George measured those a while ago, thoughht 33mm, they were 32 Ceriani I think Stock 35mm.Pulled cover late last night. .......RC 315  cam, cool,look down cam chain tunnel , something about the size of a plug screw on tip laying between big roller and chain and cylinder, looks rusty or Ga clayed color, hopefully magnetic, plug  tip aluminum, we'll know later.Gotta get ready for Saturday's race.A couple of pics later. George, your pipe and the 84 catalog shipped today! Bill
« Last Edit: March 27, 2013, 05:26:11 PM by Bill/BentON Racing »
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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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Interesting,

     The specs for the single engine drag frame from the +/-1976 RC Engineering catalog calls for a cb100/125 front end(27mm forks!).  I've seen some pics on the old ones with forks so thin, but I usually see "beefier" cb175/200 front ends with 31mm tubes or something similar.  If I have my info correct, both(cb100/125 and cb175/200) have the same mechanically operated disc front brake system(unless they have the drum version anyway), and I believe both use the same head bearing sizes.  Those Ceriani trees on the Tiger are much better looking than the factory CB parts regardless ;).

You didn't mention, did you weigh the bike?

Funny, you just sold me your RC 315 cam, and what do you get on the Tiger, another RC 315 cam :D.  Are you planning on pulling the head to verify the piston type and compression?  I'd be very interested to see close up pics of the head to compare your RC prepped head to mine.

Any guesses on what you think it will run with the engine that is currently in it?  mid-high? compression 836 with RC prepped head and a 315 cam.  Somewhere in the ....neighborhood of 80-85hp @ 10,000rpm?  Bike weight of +/- 340 lbs minus fluids?  Hmmm...

High 10s perhaps?

George

 

Offline Bill/BentON Racing

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Sounds about rt, somewhere in the 10's.Haven't weighed it yet.Some pics later, 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 dragracer

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Sounds about rt, somewhere in the 10's.Haven't weighed it yet.Some pics later, Bill

Bill,
Don't forget, there's a nice scale at the end of the track near the ticket booth. No need to guess, we can roll it down there to check it out. I'll have my tow bike with me.

Offline Sam Green Racing

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Bill,

     When you get a chance, would you mind measuring your fork tubes.  I'm guessing that they are the cb175/cb200 31mm tubes, rather than the also common cb100/cb125 27mm tubes.  Also have you weighted the complete bike yet?  I'd be very curious to know.  I imagine that you have far more important things to do, like see what's doing on under that cam cover ;), but when you get a chance...

George

George, it don't matter what forks you use as long as ther are up to the job and nice and light.
Have you ever seen a set of Honda C100 cub forks standing up to fuel injected nitro power.


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CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline POPS 911

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BILL: Those were Super clean carbs I sent you right, for GEORGE  ??????  You asked about flat slides and I told you before I have LIKE NEW many sets but these were used on 1105cc 73mm DOHC KZ and 1261cc 78mm GS1000 and I would think way to big for any bored out 750 block = right. Those 33mm smoothbores w/31mm inserts worked just fine on a 1075cc 72mm KZ 1000 on the dyno. Great thing about smooth bores are the ease of changing jets for the right set up = about 15 minutes.

POPS BK911

Offline gschuld

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Pops 911,

     Oh those carbs are for me alright ;).  I just don't won't have the RC 1000 motor up and running this season.  So Bill gets to play around with them for a while, and I get some nice feedback on how they run before I need them.  A win/win...

George

Offline Bill/BentON Racing

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We'll talk carbs later,but yes they were clean.Been working on the Chapman Tiger!

RC315 cam

Pretty clean inside,except for one pc of Ga.clay,BB size,no hose on breather cover,no two screws underneath it! They did point out the two missing in rear of breather cover.Retorqued everything,good thing.cam chain tight,but not H/D also later cam sprocket ,but not slotted.Will be an APE one soon.Valve lash should be .012".Most were @ .014,.013 real loose,but .014 wouldn't quite go in.#2 intake was @ .010.All at .012 now. ;D Foreign pc ,used magnet with grease,soon as contact made it fell to bottom,I hope (gotta pull sump).
May have been plug of dirt,we'll see. aftermarket tappet caps,threads a little longer,rockers were hitting some!
Back together now,but needs wires and caps.

Put on Calendar Girl's old caps...Black,Jerry!!! ;) ;D

Getting there

That's the NitroHunter seat in front,one to sit on,one behind you! well,maybe!!! ::) ;D
Coming to a track near...here...one day!! ;) ;D

More ,after sump pulled.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 Jerry Rxman Griffin aka MuthaF'er

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Lookin good Pinkie  ;)  If we could just figure out how to remove one cylinder stud at a time with the top still intact and replace with APE  8) Those 6.5mm stems will have to be 5mm eventually! Then a 1080. Webers would look REAL nice too. Oh hell Bill let's just leave it alone  ;D Next year  ;)

Good luck with the blob! I don't like foreign objects in the oil pan! Especially half spheres. Delivery at APE Monday.
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)