Author Topic: Bill's building a Stroker, 70mm, Bore to be determined!  (Read 2371 times)

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Offline Bill/BentON Racing

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Bill's building a Stroker, 70mm, Bore to be determined!
« on: January 23, 2014, 06:28:45 PM »
 ;D Why not? I have the pieces...or most of them! 8)

another

Sorry, Mike, I gotta! Old men old stuff, but new cyl. head! ;D

It's Johno's fault...him and Sam, and Pena, and you,Jon,Jerry,Keith,all y'alls fault!  ;D

Like I need another project! :o ::)

Oh well,open to advice,ideas,comments etc! ;D Bill
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Offline Bill/BentON Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #1 on: January 23, 2014, 06:30:48 PM »
And Frank, him especially, he let me ride his 1080 in the pits! ;) I want some POWER! ;D Bill
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Offline Sam Green Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #2 on: January 23, 2014, 06:34:16 PM »
You been on that apple pie stuff again ?  ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D

You can do it Bro. ;)
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Offline jweeks

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #3 on: January 23, 2014, 07:31:04 PM »
Didn't Jay stop at +5 mm on a stock crank due to oiling concerns? That crank of yours is at +7...? It may run for short periods of time, but I'd be less nervous starting with the 900f 69 mm stroke crank. Oh wait, you've already got one of them. I think that Frank's already drooling over the thought of a drop in stroker for his bike.
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Offline Bill/BentON Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #4 on: January 23, 2014, 08:09:01 PM »
That's the info Im talking about. Short periods..... 10-11 sec.! ;D
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Offline kmb69

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #5 on: January 23, 2014, 08:23:11 PM »
You GO Bill!

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #6 on: January 23, 2014, 08:49:32 PM »
Glad to contribute to your delinquency bro 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 dragracer

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #7 on: January 23, 2014, 10:12:31 PM »
And Frank, him especially, he let me ride his 1080 in the pits! ;) I want some POWER! ;D Bill

Now how did i get drug into this project?? Well, i'll accept some responsibility- i let you ride my bike on purpose. Its hard to explain what it feels like to have a purpose built chassis with a decent motor unless you experience it yourself. You got a small taste of it in Bradenton in the pits without sufficient traction- imagine a full pass down the 1320.

Not certain what that engine is going in but build a chassis that will handle ALL of the power and still be rider friendly so that anyone can ride the thing even if they have no prior race skills. IF you have to fight the chassis, you will never allow the engine to show its full potential. 

I'm looking forward to seeing how this turns out for you.


Offline dragracer

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #8 on: January 23, 2014, 10:15:26 PM »
Be prepared to replace rod bearings at least once a season.
 Regular oil changes (oil pan drain plug open) will be a must to check for brass.

Offline MRieck

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #9 on: January 24, 2014, 04:23:23 AM »
I'd magnaflux that crank before anything else....I have seen those old weld ups with cracks all over the place
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Offline Bill/BentON Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #10 on: January 24, 2014, 04:28:23 AM »
Thanks to all. Frank, going be relying on you.....cause I'll need to! The cylinders on the bench and pistons @ 73mm. So 73mm bore and 70mm stroke. Mike Rieck cyl head Stage IV.......and some big mixers(only got 29's rt now, need some 34's or 36's!
Chassis to be determined....but it will go in a purpose built drag bike. Thinking of the K frame raked from Pena,and RC club foot swingarm to start. Or rake '77F frame(Frank?) and use that NOS Tracy body with the chrome RC Clubfoot swingarm.I think I better get to work! lol. Sam you still BELONG over here.....at least this year!  ;D C'mon man! 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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Offline Bill/BentON Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #11 on: January 24, 2014, 04:32:28 AM »
Yes, Mike I agree. Better start right there!  ;D Also got other big race motor.....hum, disassemble or try to get running?
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 Jim F

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #12 on: January 24, 2014, 09:24:09 AM »
I double on Mikes advice of having it checked out really good
they did that on my crank and had it nitrided also.
I just did some touch up work on a stroked crank that was welded
and was surprised at how porosity was on the bearing surfaces

good luck
Jim
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Offline Bill/BentON Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #13 on: January 24, 2014, 10:29:48 AM »
Jim, thanks. Who did your crank work? 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 POPS 911

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #14 on: January 24, 2014, 11:05:49 AM »
BILL: I got 34FS and 36FS and a New SET of Lectrons  and round slides 31 and 33's all like new.

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Offline johno

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #15 on: January 24, 2014, 02:45:20 PM »
Bill,   you must be on steroids  ;) ;D  8)     can I have some  ;D
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Offline Don R

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #16 on: January 24, 2014, 02:58:37 PM »
73 x 70 is the legendary 1180! (approx)  Mine turned out to be 69 x 72, 1124 I think.
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Offline Bill/BentON Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #17 on: January 24, 2014, 04:30:15 PM »
Fun already! POPS, I'll PM you. 1180cc yeah baby! ;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 Big Jay

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #18 on: January 24, 2014, 06:15:11 PM »
I'd magnaflux that crank before anything else....I have seen those old weld ups with cracks all over the place

We just had a 9.5mm in here that was cracked everywhere you could fit a crack.   It came with a set of golden rods that had big ends too far out of round to use.

Offline Medyo Bastos

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #19 on: January 24, 2014, 06:29:56 PM »
was that mine Jay?

Offline dragracer

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #20 on: January 24, 2014, 07:53:03 PM »
Bill,

I say go as big as you can on the motor size. We've got more years behind us than ahead so we need to reach out for all the thrills we can fit into our remaining days.

Offline Bill/BentON Racing

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #21 on: January 24, 2014, 08:04:20 PM »
Frank,I agree. 36 mm flat slides from POPS? I think the head and bore etc 36 better than 34?
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 POPS 911

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #22 on: January 25, 2014, 12:47:24 PM »
BILL: I looked in my parts room and could find only the 34's FS and a set of 40's FS = I think I sold the 36's to a guy in INDY at FAST LANE CYCLES.
The 34's are like brand new and have new stacks on them , these carbs are all stored in a heated room, sealed in plastic shrink wrap and WD40. My nephew bought these 34's brand new and then we switch his KZ BIKE over to LECTRONS and I bought them from him = he used them one season......
Lesson I learned about big carbs on KZ1000+ if you go to big then you keep jetting down all weekend = little smaller carbs same jets all weekend more power and leaner running in PRO/ ET from 8AM. to 11.30 PM. [ FINAL ROUND ]  MORE CONSISTENT  + or - dial in shifting at 10,500 rpms.

POPS BK911

Offline Jim F

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Re: Bill's building a Stroker, 70mm, Bore to be determined!
« Reply #23 on: January 25, 2014, 04:46:02 PM »
Bill
Your going to have to talk to Brian as he did
The bottom end
Jim
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