KZR's Bikes of the Month for 2024

72' MGB-GT

  • Kelly E
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20 Jan 2023 17:55 #879085 by Kelly E
72' MGB-GT was created by Kelly E
Yesterday after aquiring 2 more bikes I changed my insurance to Hagerty. After I got cancer in 17' I had to choose between the MGB-GT and the Sabre and Concours. Now I was able to insure all 5 of my bikes and the MG with full coverage and no deductibles.So today I pumped out the 7 year old gas and put in 10 gallons of fresh gas. Topped up the battery, pulled the choke, waited for the fuel pump to stop and turned the key. It fired up like it had run yesterday. Fully warmed up it still idles at 50psi.  I have to bleed the clutch and get a new set of tires before I start driving it again. Over the last 20 years it has been my most reliable car, it always runs. It's a basic car with points ignition, manual everything and only 4 fuses. Not much to go wrong.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

And more
The following user(s) said Thank You: JR, ThatGPzGuy, 78z1Joe, Nessism, Street Fighter LTD, BCScott, Dragbike_Mike, RBRKZ and 2 other people also said thanks.

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20 Jan 2023 18:17 - 20 Jan 2023 18:18 #879086 by Dr. Gamma
Replied by Dr. Gamma on topic 72' MGB-GT
Are those Minilite wheels on the MGB/GT??  Great looking wheels!!!!



 

1972 H2 750 Cafe Racer built in 1974.
1976 KH400 Production Road Racer.
1979 Kz1000 MK. II Old AMA/WERA Superbike.
1986 RG500G 2 stroke terror.
1986 GSXR750RG The one with the clutch that rattles!

Up in the hills near Prescott, Az.
Last edit: 20 Jan 2023 18:18 by Dr. Gamma.
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  • Kelly E
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20 Jan 2023 21:26 #879097 by Kelly E
Replied by Kelly E on topic 72' MGB-GT
Thanks, They are Minilite style wheels made by Superlite in Australia. I bought them new a dozen years ago from Acme Speed Shop in South Carolina.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

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21 Jan 2023 06:43 #879106 by ThatGPzGuy
Replied by ThatGPzGuy on topic 72' MGB-GT
The GTs are great MGs. I have the Triumph competitor to it. Down currently with a bad diff. 
   

Jim
North GA
2016 Yamaha FJR1300ES
1982 GPz750 R1
1974 Kawasaki H1
1976 Kawasaki KZ400
1979 Yamaha XS650 cafe'
2001 KZ1000P
2001 Yamaha YZ426
1981 Honda XR200 stroked in an '89 CR125 chassis
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it, it's not really yours"
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21 Jan 2023 07:58 #879113 by gd4now
Replied by gd4now on topic 72' MGB-GT
Love both cars!!!  My son in law and his brother race these two

1977 KZ650 B1
Pods and Denco header


OLD KAW OWNERS SMILE ALOT

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21 Jan 2023 09:55 - 21 Jan 2023 09:55 #879116 by Wookie58
Replied by Wookie58 on topic 72' MGB-GT
These old British sports cars are great fun on twisty roads and generally pretty bulletproof if you can keep on top of the body corrosion
Last edit: 21 Jan 2023 09:55 by Wookie58.
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  • Kelly E
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21 Jan 2023 18:56 #879135 by Kelly E
Replied by Kelly E on topic 72' MGB-GT
British Heritage sells all of the repair panels stamped from the original tooling. After bracing drill out the spot welds to remove the original panel then fit the replacement and spot weld it in. Even I can do it.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

And more
The following user(s) said Thank You: Wookie58

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  • Kelly E
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22 Jan 2023 15:43 - 22 Jan 2023 15:46 #879175 by Kelly E
Replied by Kelly E on topic 72' MGB-GT
Today I figured out that the clutch slave cylinder is shot and the clutch pushrod is worn down. I'll have the new parts including a new set of windshield wipers here on Wednesday. After that I'll get a new set of tires and start having fun on the back roads again.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

And more
Last edit: 22 Jan 2023 15:46 by Kelly E.
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23 Jan 2023 14:34 #879208 by BCScott
Replied by BCScott on topic 72' MGB-GT
If that '72 was imported through regular channels to North America in 1972, there's about a 1 in 10 chance that I drove it. All through high school, I worked part time (full time in the summer) at Autoport in Eastern Passage, Nova Scotia. All BLMs destined for NA came through our plant, where they were brought off of the ship by stevedores and picked up by us drivers, mostly high school kids. We'd bring them from lot to lot, then load them on trucks or trains, depending on their final destination. I had a blast at that job! 

Back in the saddle and loving it! KZ1000A1
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  • Kelly E
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23 Jan 2023 17:44 #879209 by Kelly E
Replied by Kelly E on topic 72' MGB-GT
That's awesome BCScott. It was purchased new from the BMC dealership in Seattle. 10 years later she sold it to a guy in Mt Vernon Washington. He sold it in 2002 to a guy in Anacortes Washington and I bought it in 2006 when I got my Automotive degree. I drove it home 50 miles and it made it, barely.
I've been through all of the systems,  replaced the cracked head with a big valve aluminum head and replaced the interior. I haven't really touched the bodywork since I live a quarter mile from the pavement there's usually mud slung all over behind each wheel. Today I ordered the new clutch slave cylinder and pushrod plus a new set of windshield wipers.  It hopefully will be on the road by the end of the week.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

And more

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  • Kelly E
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25 Jan 2023 20:21 - 25 Jan 2023 20:25 #879307 by Kelly E
Replied by Kelly E on topic 72' MGB-GT
Today we tried to fill the hydraulic clutch system from the slave bleeder but couldn't get the all the air out. The design of the slave cylinder puts the bleeder valve on the lower right side of the cylinder. So I removed the slave cylinder and ziptied the pushrod in just in case and let it hang vertical so the bubbles can rise up out of the cylinder and up the hard line. Tomorrow I'll push another 60cc's up from the slave bleeder valve and hopefully push the air that was possibly trapped in the slave cylinder.
Before I installed the new slave cylinder I took it apart because the last one didn't have many miles on it. Inside I found a little bit of grey pastey stuff, you can see it on the rag. So I cleaned it up and realized that I needed to smooth out the front corner of the piston. After I deburred it I cleaned it up again, lubed the seal with red brake grease and the outer side of the piston with SylGlide and reassembled it. The previous slave cylinder had a spring, floating inner piston, floating seal and an outer floating piston. The result was premature wear to the pushrod tip, clevis pin and hole. In my opinion not a good design since the clutch arm moves in a small arc.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

And more
Last edit: 25 Jan 2023 20:25 by Kelly E.

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26 Jan 2023 00:14 #879309 by Wookie58
Replied by Wookie58 on topic 72' MGB-GT
It is not uncommon with cars to have this stupid set up where the bleed nipple is lower than the inlet which makes bleeding a nightmare, however good news is there is an easy method that we used on these "back in the day"
  1. open the bleed nipple on the clutch
  2. connect a length of hose from the clutch nipple to the left front brake bleed nipple
  3. apply light pressure to the brake pedal and open the brake nipple (a friend or a pressure bleeder helps at this stage)
  4. gently operate the brake (the air is pushed out through the clutch reservoir) 
  5. close the brake nipple first
This should have it done with a couple of pumps of the brake pedal. Keep an eye on the fluid levels in both reservoirs. 
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