Author Topic: Cobra motor disassembly and rebuild  (Read 108646 times)

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Offline dragracer

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Re: Cobra motor disassembly and rebuild
« Reply #725 on: December 08, 2016, 11:43:49 AM »
Well deserved Bill. You worked hard to get the bike in the ten's so this stands as a fitting reward. I'm sure you'll work even harder next time to lower and own both the MPH and ET records. Name in the books for all future generations and the old farts to see as well.

Offline Retro Rocket

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Re: Cobra motor disassembly and rebuild
« Reply #726 on: December 08, 2016, 01:47:43 PM »
Very cool.... 8)
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline 754

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Re: Cobra motor disassembly and rebuild
« Reply #727 on: December 08, 2016, 01:50:43 PM »
Congrats.. Any 10 sec single stick is a cool bike..
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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 Medyo Bastos

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Re: Cobra motor disassembly and rebuild
« Reply #728 on: December 08, 2016, 03:44:56 PM »
mak'n us old farts proud  8)

Offline kmb69

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Re: Cobra motor disassembly and rebuild
« Reply #729 on: December 08, 2016, 04:01:17 PM »
Ditto!   ;)

Too Kool, Billy!  8)

Offline dragracer

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Re: Cobra motor disassembly and rebuild
« Reply #730 on: December 08, 2016, 04:50:18 PM »
Well, my hard copy didn't arrive yet so here's a picture of a PDF document  showing the other half of the CB/SS national record. Mine is for lowering my previous ET record from 2015. Next season is going to be very interesting.

Offline Bill/BentON Racing

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Re: Cobra motor disassembly and rebuild
« Reply #731 on: December 10, 2016, 07:03:56 PM »
Yes, it is! Lol. I'm so tired, wore out all my hand files rounding corners and filing additional cooling slots, wow time consuming! LMAO
« Last Edit: December 10, 2016, 07:05:34 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.
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Offline 754

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Re: Cobra motor disassembly and rebuild
« Reply #732 on: December 10, 2016, 07:07:54 PM »
Ummmm that was an early original head....
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

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: Cobra motor disassembly and rebuild
« Reply #733 on: December 10, 2016, 07:11:59 PM »
Good eyes like in your avatar! 1011012 serial number. Went American picking last week.......
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: Cobra motor disassembly and rebuild
« Reply #734 on: December 10, 2016, 07:35:53 PM »
Looks like the Sun (rims?), is shining on you.. Hah ..looks like those cuts were already done to that head..
 Man I would be playing up the 69 Honda 4 think to the max if that hits the track..
 I got a 10*** case that is cut for 1080 , needs a few small welds... .Yoshi rods breakup rather than eat thru your cases.. It had I think powroll pistons in it..
« Last Edit: December 11, 2016, 06:39:00 PM by 754 »
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

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: Cobra motor disassembly and rebuild
« Reply #735 on: December 10, 2016, 07:45:34 PM »
You good Frank! Engine built in 1970!
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: Cobra motor disassembly and rebuild
« Reply #736 on: December 10, 2016, 07:52:46 PM »
No that would be October or November 69 if its 11***
Did it come out of that trike ? What happened to the trike ?
Reminds me of one called Stratotaxi...
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

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: Cobra motor disassembly and rebuild
« Reply #737 on: December 10, 2016, 08:06:08 PM »
I meant he built it in 1970. I'll ask about the trike. He was a tool and die maker, so was his Dad and Grandad!
« Last Edit: December 10, 2016, 08:08:29 PM by Bill/BentON Racing »
BentON Racing Website
OEM Parts | Service | Custom Builds
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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.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline dragracer

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Re: Cobra motor disassembly and rebuild
« Reply #738 on: December 10, 2016, 08:59:07 PM »
Well, well. You scored Another treasure trove of Sohc parts. My luck isn't that good. Since the valve cover is off, I see you went in deep to investigate. Hopefully you're satisfied with what you found. Time for me to start searching for a complete motor again. I'm going to need some parts and pieces so I can maintain what I'm currently running.

Good job Bill. Nothing better than coming home with a trailer load.

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Cobra motor disassembly and rebuild
« Reply #739 on: December 10, 2016, 10:21:44 PM »
Uhhh Frank, I'd bet Bill has a complete motor! LOL
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: Cobra motor disassembly and rebuild
« Reply #740 on: December 11, 2016, 12:21:38 AM »
Uhhh Frank, I'd bet Bill has a complete motor! LOL

Well now, you've got a good point there Jerry. hahaha

Offline Bill/BentON Racing

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Re: Cobra motor disassembly and rebuild
« Reply #741 on: December 11, 2016, 04:56:53 AM »
You just need to stop by and get one! No $ needed for you! ;D
No ,the engine is still together from the old days. Those are pics of the build. Said he used 450 pistons....real interested in that...17mm pins...but he could make about anything! He built several trikes and custom bikes/choppers. Yes Medyo, I got more Invaders and a nice Girder with a 21 on it!
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 Jim F

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Re: Cobra motor disassembly and rebuild
« Reply #742 on: December 11, 2016, 06:04:18 AM »
Did your parts come from the guy in Florida bill?
2002 RC51 1000 (SP2)
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Offline Bill/BentON Racing

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Re: Cobra motor disassembly and rebuild
« Reply #743 on: December 11, 2016, 06:40:00 AM »
Jim, yes. Came through Jeff Sutton,  his quote was" if it was Kawasaki stuff, I'd bought it", so I called Bob and we put it together last weekend.  Here's a pic of my mask after an hour or so upstairs......where the good engine and another 101xxxx engine came from and lots of parts! Used rope and a board screwed to steps...just me and Donnie. Lot of hard work, 2 days, finished at 3pm Sunday, then drove 12 hours home from Ft. Lauderdale. Still got to unpack trailer!!
« Last Edit: December 11, 2016, 06:48:06 AM by Bill/BentON Racing »
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 Jerry Rxman Griffin aka MuthaF'er

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Re: Cobra motor disassembly and rebuild
« Reply #744 on: December 11, 2016, 10:16:49 AM »
An A engine with a Santee box on it. What's your take on 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 Medyo Bastos

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Re: Cobra motor disassembly and rebuild
« Reply #745 on: December 11, 2016, 10:29:29 AM »
pinto tail lights?

Offline Bill/BentON Racing

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Re: Cobra motor disassembly and rebuild
« Reply #746 on: December 11, 2016, 11:42:22 AM »
Jerry I imagine the A was in a chopper. Don't know what all I got yet! Lol, K, Bill
BentON Racing Website
OEM Parts | Service | Custom Builds
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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.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline dragracer

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Re: Cobra motor disassembly and rebuild
« Reply #747 on: December 11, 2016, 02:29:45 PM »
Thanks Bill. I don't need a runner. In fact it can be locked up with water damage as long as its a complete engine. I'll gladly accept the scraps 😆

Offline Bill/BentON Racing

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Re: Cobra motor disassembly and rebuild
« Reply #748 on: December 11, 2016, 05:05:21 PM »
We can make that happen. Just got to come get it etc.  ;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 dragracer

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Re: Cobra motor disassembly and rebuild
« Reply #749 on: December 11, 2016, 10:08:12 PM »
We can make that happen. Just got to come get it etc.  ;D

Will let you know when I can get down that way. The junk pile head rebuild is completed thanks to you and the new valves. Just need to get to the machinist next week to pick it up. I'm going to start figuring what other parts I might need after that happens.