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Old Triumph 750 Bonneville #4479592
08/05/17 06:56 AM
08/05/17 06:56 AM
Joined: Feb 2013
Posts: 3,226
Central Virginia
Silverado12 Offline OP
Silverado12  Offline OP
Joined: Feb 2013
Posts: 3,226
Central Virginia
Anybody know anything about these bikes or where I can go for information? My brother is about to get a nice old T140? 1976 750 Bonneville. It has disc brakes front and rear, left side shifter and under 9,000 miles. It's got good compression but has been setting for a long time and won't start.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479595
08/05/17 06:57 AM
08/05/17 06:57 AM
Joined: Feb 2013
Posts: 3,226
Central Virginia
Silverado12 Offline OP
Silverado12  Offline OP
Joined: Feb 2013
Posts: 3,226
Central Virginia


Here's a picture. Everything seems to be there.

Last edited by Silverado12; 08/05/17 06:58 AM.

12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479596
08/05/17 07:00 AM
08/05/17 07:00 AM
Joined: Jun 2017
Posts: 209
NY
DdDd Offline
DdDd  Offline
Joined: Jun 2017
Posts: 209
NY
A new used model is better in so many ways and will probably cost less over time.

Does he want to ride or have a excuse to whip out the 1000 piece tool kit? The old stuff was built like junk.

Dig the blue though.

Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479598
08/05/17 07:03 AM
08/05/17 07:03 AM
Joined: Feb 2013
Posts: 3,226
Central Virginia
Silverado12 Offline OP
Silverado12  Offline OP
Joined: Feb 2013
Posts: 3,226
Central Virginia
It's just a toy for him. He likes old stuff and tinkering with mechanical things.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479599
08/05/17 07:04 AM
08/05/17 07:04 AM
Joined: Oct 2010
Posts: 1,753
PA
123Saab Offline
123Saab  Offline
Joined: Oct 2010
Posts: 1,753
PA
Fun to drive and tinker with. On a unknown bike it pays off to rebuild engine and carb, pretty straight forward stuff.
Leaks oil (Some more than others) and has quirky electronics. Nice projects and weekend short trippers.

Worth keeping stock for resale value.

http://www.triumphrat.net/forum.php


Anything can happen
The tallest towers be overturned
Those in high places be daunted
Those overlooked regarded
- Seamus Heaney
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479605
08/05/17 07:18 AM
08/05/17 07:18 AM
Joined: Dec 2003
Posts: 9,808
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,808
Florida, Cape Coral
A wonderful bike to ride. I had one and rode it to college way back, I also had a Royal Enfield 30.50(30.5 CU IN= ~ 600CC) Tomahawk. Wonderful vertical twin engine bikes.


CX5 Touring 2.5L :-)
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479619
08/05/17 07:38 AM
08/05/17 07:38 AM
Joined: Sep 2009
Posts: 16,027
OH
fdcg27 Online content
fdcg27  Online Content
Joined: Sep 2009
Posts: 16,027
OH
Looks like a nice unmolested original that was never dropped.
The no-start problem is almost certainly caused by an ignition system fault, although the carbs could likely use a tear down.
These are said to be very nice bikes to ride although in no way fast by modern standards.
This would be a fun toy to have.


17 Forester 18K VME 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479621
08/05/17 07:41 AM
08/05/17 07:41 AM
Joined: Jun 2017
Posts: 209
NY
DdDd Offline
DdDd  Offline
Joined: Jun 2017
Posts: 209
NY
http://m.triumphmotorcycles.com/bikes/classics/street-twin/2016/street-twin

Still... probably same price or cheaper!


Dealers are swatting flies these days. Having ridden old and new, I was surprised how much nostalgia rarely lives up to the hype.

Fit, finish and materials are better than the 70s, when the Japanese were handing Triumphs you know what on a platter!

Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479673
08/05/17 08:42 AM
08/05/17 08:42 AM
Joined: Jun 2006
Posts: 370
Texas
Neely97 Offline
Neely97  Offline
Joined: Jun 2006
Posts: 370
Texas
Back in the late 60s I rode with some riders who had them.
Beautiful bikes but needed constant tinkering.


6.7 cummins, Toyota 4 runner
FUMOTO
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479739
08/05/17 10:02 AM
08/05/17 10:02 AM
Joined: Apr 2009
Posts: 223
Reno, Nevada
Langanobob Offline
Langanobob  Offline
Joined: Apr 2009
Posts: 223
Reno, Nevada
I've had a '66 Bonneville for years. It used to be my daily rider, lots of fun. Definitely a hobby machine, it will take lots of TLC but worth it in my opinion. What I did was methodically go through the electrical system and get rid of everything that said Lucas on the nameplate. You could, and I think you still can, get aftermarket voltage regulators and ignition systems that are very good. If he wants to spend the money.

If it's been sitting a long time old fuel has probably gummed up the carbs. They are easy to work on.

Bottom line is that there was a reason that the original Triumph motorcycle company folded. The Japanese bikes of the era were just plain more reliable and had much better engines.

If your brother is looking for a hobby project, this might be a good one. If he just wants a neat old motorcycle to ride I'd suggest he buy one of the many newer retro bikes. In my case, the old Triumphs is just a lot of fun. Once I got it squared away I rode it across the US with the only problem being a chain replacement. But I am very close to being a professional hobbyist.

Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479751
08/05/17 10:22 AM
08/05/17 10:22 AM
Joined: Mar 2012
Posts: 1,288
San Antonio, TX
E150GT Offline
E150GT  Offline
Joined: Mar 2012
Posts: 1,288
San Antonio, TX
The only motorcycle I have ever ridden was a Bonneville TR120? from 1972? Beautiful bike. Not reliable. Last time I rode it, it almost caught on fire. the wiring harness was smoking.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479768
08/05/17 10:34 AM
08/05/17 10:34 AM
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
Johnny2Bad Offline
Johnny2Bad  Offline
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
Buy this book. THE bible for classic british bikes.

http://modernmotorcyclemechanics.com


'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]
Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479807
08/05/17 11:14 AM
08/05/17 11:14 AM
Joined: Sep 2009
Posts: 2,161
Deep in the heart of Jersey
BigCahuna Offline
BigCahuna  Offline
Joined: Sep 2009
Posts: 2,161
Deep in the heart of Jersey
Compression, fresh gas, air and spark will make it run. Check if the points are still set right.,,

Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479940
08/05/17 01:39 PM
08/05/17 01:39 PM
Joined: Dec 2005
Posts: 2,890
The Canyons
02SE Offline
02SE  Offline
Joined: Dec 2005
Posts: 2,890
The Canyons
A neat looking old bike, that required constant attention to keep running. Now that it's 40+ years old, it will be even less reliable. If he wants to tinker with it, and look at it, it's a great bike. If he wants to ride, he'd be better off getting a new replica version.

Re: Old Triumph 750 Bonneville [Re: Silverado12] #4479949
08/05/17 01:45 PM
08/05/17 01:45 PM
Joined: Sep 2009
Posts: 2,161
Deep in the heart of Jersey
BigCahuna Offline
BigCahuna  Offline
Joined: Sep 2009
Posts: 2,161
Deep in the heart of Jersey
I would bet that once it gets started and he does a few hundred miles, it will perform like it did before it got parked. Great bike for bike nights, or just fair weather Sunday rides.,,,

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