Author Topic: Re: Bigsam302's 76 CB750F (915cc): Project Helen – Running Report!  (Read 56644 times)

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Offline SOHC4 Cafe Racer Fan

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen - Finally, progress!!!
« Reply #175 on: October 07, 2015, 11:25:26 AM »
Sam,

Do you have a runner, yet? Inquiring minds want to know!!   ;)

Don
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Bigsam302

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen - Finally, progress!!!
« Reply #176 on: October 07, 2015, 12:05:16 PM »
No not yet. I'm still at work. I should have taken off today because I can't concentrate on work

Sent from my GT-I9505G using Tapatalk

1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline SOHC4 Cafe Racer Fan

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen - Finally, progress!!!
« Reply #177 on: October 07, 2015, 04:42:07 PM »
I will be standing by.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Bigsam302

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #178 on: October 07, 2015, 09:53:55 PM »
Today is a great day!  I got home and tinkered around with my bike for awhile.  I finished programing my speedo, installed my exhaust and put about 2 gallons of gas in her.  I pulled out the choke and she fired right up!  I can’t believe that she actually runs!  Since this was just my first run, I didn’t give it any throttle.  I just let the break-in oil run through the engine and let the camshaft break in. 

The idle is a little rough.  I still have to go back in and do a few things to her.  When I was running my electrical wiring, I made the headlight wire too short and it pull out of the socket when you turn the bars full lock.  No big deal, I’ll solder in an extension tomorrow.  I need to change the oil and filter, crank her up and go for a her break-in ride.  Oh yeah, I need to fix my exhaust bracket on the right side.  For some reason, it stripped and I am going to have to cut it off and put a new one on.  Being in a hurry, I put it on a different way than my mock up and it messed up the bolt.  So I can’t tighten it down all the way.  I’ll fix that tomorrow as well.

I also need to work on the electronic ignition.  I think that it is off; well I know that it is off.  I don’t think that I installed it right for the 1-4 cycle.  The 2-3 cycle is good.  I just didn’t move the magnets far enough.  Finally I need to adjust the idle.  It idled pretty rough during the first few minutes and then it smoothed out a little. 

Here are a few pictures and a quick video.  I’ll take better pictures later!















Video of start up


Now that the hard part is over, it’s time to move on to the tuning!
1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #179 on: October 07, 2015, 10:28:49 PM »
Congrats Sam. Feels good, huh?!
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Bootsey

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #180 on: October 07, 2015, 11:15:50 PM »
Nice work, it looks the business!

Offline SOHC4 Cafe Racer Fan

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #181 on: October 07, 2015, 11:21:49 PM »
Yessssssss!!!!!
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline MessnerMoto

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #182 on: October 08, 2015, 12:17:40 AM »
! Congrats !!! I'm just a little bit jealous ;)

Offline GV1390

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #183 on: October 08, 2015, 04:38:04 AM »
Man, this looks good! A+ and congrats!
93' GSX-R1100, 78' CB550, 71' CL350, 71’ CB500 & 02' ZRX1200R.

Offline calj737

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #184 on: October 08, 2015, 04:39:35 AM »
Sam - Nominating you for BOTM. Check out that thread to accept! Well done, buddy, well done!
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Bigsam302

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #185 on: October 08, 2015, 06:21:08 AM »
Congrats Sam. Feels good, huh?!

Thank Jerry!  Yes it does feel amazing.  I'm still in shock that it is actually running.  The build took way longer than I thought that it would and I was starting to think that it was never going to happen.

Nice work, it looks the business!

Thank you Bootsey!

! Congrats !!! I'm just a little bit jealous ;)

Thanks Messner!  I'm really looking forward to see how your build turns out!

Man, this looks good! A+ and congrats!

Thank you GV1390!  It is greatly appreciated!

Sam
1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline Bigsam302

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #186 on: October 08, 2015, 06:25:19 AM »
Yessssssss!!!!!

Yep!  I can't believe it myself.  You can finally plan your trip down here now!

Sam - Nominating you for BOTM. Check out that thread to accept! Well done, buddy, well done!

Thank you Cal.  I just went over and accepted.

I do want to thank you and Don for all the help and advice that you have given me.  As so many have said before, this site has a wealth of knowledge and information, and most importantly, great guys like you two who are always willing to help out a fellow rider.  I cannot thank you enough!

Sam
1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline calj737

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #187 on: October 08, 2015, 06:59:28 AM »
I cannot thank you enough!
Sure you can, ride that beauty safely, and regularly!
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline SOHC4 Cafe Racer Fan

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #188 on: October 08, 2015, 07:25:50 AM »
What a hell of a bike! That engine is going to create some power and torque.

Time to break it in!

You may need to rename her from Helen to Rhonda Rousey!
« Last Edit: October 08, 2015, 07:39:02 AM by CB750 Cafe Racer Fan »
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline marting100

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #189 on: October 08, 2015, 07:38:23 AM »
Awesome bike!! love it! nice work man!
M

Offline Bigsam302

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #190 on: October 08, 2015, 09:40:23 AM »
Awesome bike!! love it! nice work man!
M

Thank you Marting.
1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline SOHC4 Cafe Racer Fan

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #191 on: October 11, 2015, 09:47:37 PM »
Today, I had the pleasure of meeting Sam and seeing his beautiful CB750F.  What a cool guy and an amazing build. 

This bike is so meticulously designed and put together for the purpose of performance. 

The frame has cross-bracing between the downtubes and tubes behind-below the carburetors.  The stock used and clean welds make it look like it came from the factory that way. 

The engine, oh the engine.  A beast of a 915 with Carrillo rods, ported head, and performance cam -- topped off with RS34 carburetors and GIGANTIC Steel Dragon velocity stacks.  This thing reminds me of the level of detail executed by Doctor D and Tweakin.  You just know it is going to pull like a freight train.   

The suspension is fully squared away.  It is equipped with the latest generation GSXR750 Big Piston Fork resprung for the weight of THIS bike, with Brembo monoblock calipers, and Cognito front hub and triple tree.  The rear brake features a custom carrier with Brembo caliper off a Ducati Monster.  Sam also came up with a trick mount for his trick combination anolog tachometer and inserted Motogadget miniscope.  The gauge is fully rebuilt with Joker trimmings. 

And then there's the wiring.  All Motogadget: M-Unit, M-Lock, switches.  It is so clean and tucked under the seat with a Li-Ion Anti-Grav battery.  The M-Lock RFID has a hidden gusset that points the wireless key under the seat to activate and lock the electronic system. 

Sam is still sorting through some shake-down/brake-in issues (requiring some minor tig welding on the oil tank fitting), but should have this baby sorted in short order.  Although the Benji tank is pretty, the QC (quality control) could have been higher.

This bike is built to handle, and go/stop quickly.  Sam's daily rider is a Ducati 1198 with no chicken -strips on the tires. 

I'm looking forward to coming back down to SD with one of my bikes and trying to keep up with him.

Kudos, Sam!!  It was great meeting you.
« Last Edit: October 12, 2015, 06:46:28 AM by CB750 Cafe Racer Fan »
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline GV1390

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #192 on: October 12, 2015, 04:24:29 AM »
Looks fantastic.

Now enough with the text and pictures, let's see some videos of it ripping by! :)
93' GSX-R1100, 78' CB550, 71' CL350, 71’ CB500 & 02' ZRX1200R.

Offline Bigsam302

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #193 on: October 12, 2015, 07:12:01 AM »
Don,

It was a pleasure meeting you!  It's people like you that make this forum such a great community.  Again, I cannot thank you enough for all of your help and for your kind words.  Don't worry, I am working diligently at working out the last few bugs.  I'm hoping that it will not take me longer than a week or two.  I'm looking forward to going on that ride with you!  :D

Issues to sort out

1) For those who don't know, I have three minor things to fix on my bike.  Most of you remember the issues that I had with the crappy work on my gas tank from Benjies.  Well the same crappy work was done to my oil tank.  I thought that I had all the tank fixed.  All the pin holes from crappy welding was fixed, but the fittings do not seal.  While the bike is sitting and running there are no issues.  Once you take it out on the road and put the engine under pressure, oil starts pouring out of the coupling and all over the engine.  To fix this, I have ordered new Aeroquip AN couplers and a weld-in bung from Summit Racing.  I'll take the tank back to a welder to get this fixed.

2) The clutch is barely working.  It shifts just fine with the engine on, but once you put it under power, you can barely shift gears.  So on my test right, I didn't go above 3rd gear.  I'm going to take the clutch apart.  I'm getting rid of the Cycle X plates and go with another brand.  I tried all kinds of adjustments and nothing works.  I already have heavy duty springs, so I am considering going with OEM friction plates.

3) The last issue should be an easy fix.  I have what some call a "Hanging Idle."  What this means is that while you are out riding, you accelerate, or just rev the bike and the RPMs come down very slowly when you release the throttle.  You would think that this is because of a kink in your throttle cables or that they are too tight.  But this is not the case.  From what I read, the main cause of this is from the bike running lean.  I haven't adjusted the air/fuel ratio yet.  Hopefully this will solve it.

I'll update when I get some progress.

Sam
1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline calj737

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #194 on: October 12, 2015, 01:56:18 PM »
Sam - I would also investigate the vent in the oil tank. If you're only leaking when building pressure, then that pressure should be vented, not bulging the tank and forcing oil out of the fittings. Sure, the fittings should not leak, but that they do causes me to think about pressure issues not welding flaws...
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Bigsam302

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #195 on: October 12, 2015, 02:21:54 PM »
Sam - I would also investigate the vent in the oil tank. If you're only leaking when building pressure, then that pressure should be vented, not bulging the tank and forcing oil out of the fittings. Sure, the fittings should not leak, but that they do causes me to think about pressure issues not welding flaws...

Cal,

I agree about the venting.  It does have a vent line.  I looked at the tank today and there was no oil leaking from the supply line.  But there was oil leaking from the return line.  The vent line did not have any oil in it.  If I understand correctly the way the oil system works, the supply line draws oil into the motor by suction/gravity.  The oil is then forced back to the oil tank by using pressure from the oil pump.  On my tank, oil is being forced out of the fitting at the back of the coupling on the return line.

Sam
1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline SOHC4 Cafe Racer Fan

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #196 on: October 12, 2015, 04:40:18 PM »
Sam - I would also investigate the vent in the oil tank. If you're only leaking when building pressure, then that pressure should be vented, not bulging the tank and forcing oil out of the fittings. Sure, the fittings should not leak, but that they do causes me to think about pressure issues not welding flaws...

Cal,

Here are some pictures (from the beginning of the thread) showing the oil tank construction.  It is definitely aluminum and the fittings appear to be aluminum, as well. 




They are much different from the Benjie's website pictures.
http://benjiescaferacer.com/bikes/wp-content/uploads/2013/03/trixie_cb750sohc_4.jpg

For the price Benjie charges, I would expect better QC.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline calj737

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Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #197 on: October 12, 2015, 05:12:32 PM »
yeah, I looked back earlier this evening thru all pages of this thread to revisit the oil tank. I too noticed the jack-leg tubes to AN fittings. Definitely not how I would like to see them, but, it is possible that bending them 90* helped alleviate any interference to the top of the motor or carbs? Either way, the welds around the tubes look very poor indeed. My 17 year old who has just begun TIG welding could do that damn well!

But I will also say this, aluminum TIG is not easy, but for the $$$$ paid, I'd have expected better all around. A good darn thing the rest of the bike is top notch!  :D
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Bigsam302

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    • 1976 CB750F (915cc) Super Sport
Re: Bigsam302's 76 CB750F w/GSXR Forks: Project Helen – She Lives!!!
« Reply #198 on: October 12, 2015, 06:16:36 PM »
yeah, I looked back earlier this evening thru all pages of this thread to revisit the oil tank. I too noticed the jack-leg tubes to AN fittings. Definitely not how I would like to see them, but, it is possible that bending them 90* helped alleviate any interference to the top of the motor or carbs? Either way, the welds around the tubes look very poor indeed. My 17 year old who has just begun TIG welding could do that damn well!

But I will also say this, aluminum TIG is not easy, but for the $$$$ paid, I'd have expected better all around. A good darn thing the rest of the bike is top notch!  :D

Cal and Don,

The fitting legs that they used are horrible.  The design is fine and the 90 degree bend helps to clear the top of the engine case.  I think that the Trixie design is worse.  If you look at the photo on his site, those couplings are really cheap and they don't do a good job of sealing.  The AN coupling that I ordered arrived today and they are MUCH MUCH better.  It should solve all of my leaking issues.   You are right, the QC on this is ridiculous.  I'm so pissed with all the issues that I have had with the gas tank, and now the oil tank.

Sam
« Last Edit: October 12, 2015, 06:20:32 PM by Bigsam302 »
1976 CB750F (915cc) Super Sport: http://forums.sohc4.net/index.php?topic=142578.0

Offline calj737

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Re: Bigsam302's 76 CB750F (915cc): Project Helen – She Lives!!!
« Reply #199 on: November 01, 2015, 04:47:41 AM »
A genuine congrats, Sam on the BOTM. Truly deserved. Also makes you a very viable contender for BOTY! Looking forward to some out on the road pictures...  :D
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis