BritBike Forum logo
BritBike Sponsor BritBike Sponsor BritBike Sponsor
BritBike Sponsor

BritBike Sponsor

BritBike Sponsor
BritBike Sponsor BritBike Sponsor BritBike Sponsor
JWood Auction JRC Engineering dealers JWood Auction
Home | Sponsors, Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons, "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Photo posting tutorial

Member Spotlight
jimmymckenna
jimmymckenna
Scotland, UK
Posts: 93
Joined: April 2012
Show All Member Profiles 
Shout Box
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Who's Online Now
207 registered members (68 royalstar tony), 1,848 guests, and 517 spiders.
Key: Admin, Global Mod, Mod
Newest Members
Gus1956, Henry74, Benny, Lou Quirch, Mark Masa
10045 Registered Users
Top Posters(30 Days)
Lannis 152
kommando 111
Stuart 60
Popular Topics(Views)
480,517 mail-order LSR
Forum Statistics
Forums33
Topics65,765
Posts635,757
Members10,045
Most Online3,995
Feb 13th, 2017
Like BritBike.com on Facebook

Previous Thread
Next Thread
Print Thread
Rate Thread
T120 engine #712195
10/22/17 6:39 am
10/22/17 6:39 am
Joined: Jan 2006
Posts: 10
Elkgrove California
G
Glenn R Offline OP
BritBike Forum member
Glenn R  Offline OP
BritBike Forum member
G
Joined: Jan 2006
Posts: 10
Elkgrove California
I have a engine with the S/N T120 021520 which should be for a 1959 Bonneville. The engine has a alternator right side case. Did the Bonneville come with a alternator in the late 1959 model year or has this engine been changed.

Last edited by Glenn R; 11/04/17 5:46 pm. Reason: mis type
Support Your #1 BritBike Forum!
Membership Type! Free
Member
Premium
Member
Premium Life
Member
Vendor
Member
Site
Sponsor
Recognition No Premium Member Premium Life member (5 years) Vendor Member Site Sponsor Membership
Post commercial threads No No No Yes Yes
Custom title No Yes Yes Yes Yes
Upload avatar & photos No Yes Yes Yes Yes
Link avatar & photos Yes Yes Yes Yes Yes
Private Message Storage: 10 100 100 100 100
Length of signatures 255 600 600 600 600
Removes this very advert island between post 1&2 No Yes Yes Yes Yes
Price Free $12.90/year $105.00 No End
$55.00/5 years
$210.00/year
($17.50/month)
Email
Click on button >>
  Premium Member Premium Life member Vendor Member Site Sponsor Membership
Re: T120 engine [Re: Glenn R] #712198
10/22/17 7:43 am
10/22/17 7:43 am
Joined: Jun 2007
Posts: 5,558
Maui Hawaii
HawaiianTiger Online content

BritBike Forum member
HawaiianTiger  Online Content

BritBike Forum member
Joined: Jun 2007
Posts: 5,558
Maui Hawaii
That really doesn't sound right to me. It should be a generator equipped motor. Likely the case half has bee replaced at some point. Getting a case half to match would be a miracle, but your could get the cases re-machined. I've put two non matching cases together successfully but it required removing the locating dowels to do it. Both sump and cylinder surfaces needed machining for them to match. The motor came out great.....one of the smoothest I've ever done.

1960 Bonnies were alternator equipped but the numbers started with 029364, a bit later than your numbers by a fair amount.

Cheers,
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: T120 engine [Re: Glenn R] #712221
10/22/17 10:57 am
10/22/17 10:57 am
Joined: Jul 2012
Posts: 1,498
UK Berks
A
AngloBike Online content
BritBike Forum member
AngloBike  Online Content
BritBike Forum member
A
Joined: Jul 2012
Posts: 1,498
UK Berks
What are the numbers under the cases?

Re: T120 engine [Re: Glenn R] #712242
10/22/17 2:39 pm
10/22/17 2:39 pm
Joined: Aug 2001
Posts: 6,750
Vermont
Jon W. Whitley Online content

BritBike Forum member
Jon W. Whitley  Online Content

BritBike Forum member
Joined: Aug 2001
Posts: 6,750
Vermont
Going to have to see pictures of the engine and numbers in question. Until then, it's just a guessing game.


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

Re: T120 engine [Re: Glenn R] #712280
10/22/17 8:24 pm
10/22/17 8:24 pm
Joined: Oct 2006
Posts: 2,390
Elburn, Ill. USA
I
Irish Swede Offline
BritBike Forum member
Irish Swede  Offline
BritBike Forum member
I
Joined: Oct 2006
Posts: 2,390
Elburn, Ill. USA

First of all, if your serial number begins "T129..." you already HAVE a problem, as Bonnevilles are T120.
I would like to see a photo of these numbers to see if the originals have been ground off and bogus ones re-stamped in their place.

If so, that would explain the left-side case having Speed Twin or Thunderbird provisions for an alternator

Re: T120 engine [Re: Glenn R] #713040
10/28/17 11:21 pm
10/28/17 11:21 pm
Joined: Jan 2009
Posts: 556
Rotorua, New Zealand
'59 Bonnie Offline
BritBike Forum member
'59 Bonnie  Offline
BritBike Forum member
Joined: Jan 2009
Posts: 556
Rotorua, New Zealand
I'll send you a message. Cheers


"We are "motorcyclists" & "historians" our hobby includes the research & preservation of motorcycle history. What we are doing in the research & preservation of iconic bikes is, an important part of its history & value".
Re: T120 engine [Re: Glenn R] #714517
11/10/17 5:08 pm
11/10/17 5:08 pm
Joined: Jan 2006
Posts: 10
Elkgrove California
G
Glenn R Offline OP
BritBike Forum member
Glenn R  Offline OP
BritBike Forum member
G
Joined: Jan 2006
Posts: 10
Elkgrove California
So I have a 1960 engine with 1959 numbers stamped on it. what now.http://www.britbike.com/forums/tmp/2880.jpg

Attached Files t120 .JPG
Re: T120 engine [Re: Glenn R] #714526
11/10/17 6:54 pm
11/10/17 6:54 pm
Joined: Dec 2004
Posts: 9,085
Scotland
kommando Online content
BritBike Forum member
kommando  Online Content
BritBike Forum member
Joined: Dec 2004
Posts: 9,085
Scotland
What were your plans before you found out the cases are not what they say they are eg the 59 numbers.

Re: T120 engine [Re: Glenn R] #714558
11/10/17 10:06 pm
11/10/17 10:06 pm
Joined: Aug 2001
Posts: 6,750
Vermont
Jon W. Whitley Online content

BritBike Forum member
Jon W. Whitley  Online Content

BritBike Forum member
Joined: Aug 2001
Posts: 6,750
Vermont
That's too bad frown


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

Re: T120 engine [Re: Glenn R] #714587
11/11/17 1:58 am
11/11/17 1:58 am
Joined: Jan 2006
Posts: 10
Elkgrove California
G
Glenn R Offline OP
BritBike Forum member
Glenn R  Offline OP
BritBike Forum member
G
Joined: Jan 2006
Posts: 10
Elkgrove California
I have a 1955 frame I am going to use as a bobber or flat tracker. I would like to licence it for the road.


Last edited by Glenn R; 11/11/17 2:00 am.
Re: T120 engine [Re: Glenn R] #714598
11/11/17 8:23 am
11/11/17 8:23 am
Joined: Dec 2004
Posts: 9,085
Scotland
kommando Online content
BritBike Forum member
kommando  Online Content
BritBike Forum member
Joined: Dec 2004
Posts: 9,085
Scotland
I would have thought that as you are not doing a full 59 Bonnie restore then as long as the number shows as being clean in a check then you are ok. The 1960 number is long gone and only that would potentially cause problems.

Re: T120 engine [Re: Glenn R] #714619
11/11/17 2:49 pm
11/11/17 2:49 pm
Joined: Feb 2008
Posts: 4,143
New Jersey USA
Tridentman Online content

BritBike Forum member
Tridentman  Online Content

BritBike Forum member
Joined: Feb 2008
Posts: 4,143
New Jersey USA
In those years the frame and engine numbers did not necessarily correspond.
In any case-- although I am not sure of the laws in CA certainly in the North East of US the titling (the VIN#) is done on the frame number.
So the engine # is irrelevant and not even on the title.
HTH

Re: T120 engine [Re: Glenn R] #714628
11/11/17 4:11 pm
11/11/17 4:11 pm
Joined: Jan 2013
Posts: 163
Costa Mesa/Mammoth Lakes, CA
C
Chris Johnson Online content
BritBike Forum member
Chris Johnson  Online Content
BritBike Forum member
C
Joined: Jan 2013
Posts: 163
Costa Mesa/Mammoth Lakes, CA
Depends on how savvy the CHP inspector is. The engine number is listed on the title in CA and if the VIN inspector has any reason to suspect something funny is happening, they can impound the bike (the whole bike, because they won’t inspect individual parts) until the owner can convince them otherwise. VIN inspectors here are trained to identify restamps...

My B31 almost went to jail because someone may have ground off one digit from the frame number when raking the neck.

If that T120 stamp and pad doesn’t closely match what’s ‘normal’ for that era, I’d be scared to have it inspected.

Chris

Re: T120 engine [Re: Glenn R] #714632
11/11/17 4:35 pm
11/11/17 4:35 pm
Joined: Nov 2012
Posts: 301
Isle of Wight, UK
K
koan58 Online content
BritBike Forum member
koan58  Online Content
BritBike Forum member
K
Joined: Nov 2012
Posts: 301
Isle of Wight, UK
Not enough in the pics dept to see clearly.
It may be genuine, did you polish up the area of the numbers? Is the metal smooth or casting-rough between and around the tamp? They are admittedly rather more neatly stamped than most, but who knows maybe Bill Bloggs had a wait before the next one came along and chose to make a masterpiece?
Is the level well below the edge of the barrel flange? Are the edges of the number area angled or smooth casting curves?

Re: T120 engine [Re: Tridentman] #714638
11/11/17 4:54 pm
11/11/17 4:54 pm
Joined: Oct 2006
Posts: 2,390
Elburn, Ill. USA
I
Irish Swede Offline
BritBike Forum member
Irish Swede  Offline
BritBike Forum member
I
Joined: Oct 2006
Posts: 2,390
Elburn, Ill. USA
Tridentman, Glenn is working with a Triumph. BSA engine and frame numbers didn't match until 1966. but Triumph numbers certainly matched from 1950 - on.

The old adage of Triumph engine serial numbers before 1969 is:
"If they look TOO PERFECT, they are probably FAKE."

Re: T120 engine [Re: Glenn R] #714643
11/11/17 5:10 pm
11/11/17 5:10 pm
Joined: Feb 2008
Posts: 4,143
New Jersey USA
Tridentman Online content

BritBike Forum member
Tridentman  Online Content

BritBike Forum member
Joined: Feb 2008
Posts: 4,143
New Jersey USA
Thanks Irish---I stand corrected.

Re: T120 engine [Re: Glenn R] #714644
11/11/17 5:18 pm
11/11/17 5:18 pm
Joined: Feb 2008
Posts: 4,143
New Jersey USA
Tridentman Online content

BritBike Forum member
Tridentman  Online Content

BritBike Forum member
Joined: Feb 2008
Posts: 4,143
New Jersey USA
However--it is not unknown for engines to be changed out so frame and engine numbers do not always match in real life.
Also--what happens in CA if a guy buys a bike from someone in another state where the title only has the frame # as the VIN # (such as NJ where I live)?

Re: T120 engine [Re: Glenn R] #714645
11/11/17 5:20 pm
11/11/17 5:20 pm
Joined: Jan 2013
Posts: 163
Costa Mesa/Mammoth Lakes, CA
C
Chris Johnson Online content
BritBike Forum member
Chris Johnson  Online Content
BritBike Forum member
C
Joined: Jan 2013
Posts: 163
Costa Mesa/Mammoth Lakes, CA
Any vehicle brought in, even with a clear and active title will get inspected. DMV can inspect cars but all motorcycles go through CHP.

Chris

Re: T120 engine [Re: Glenn R] #714660
11/11/17 8:29 pm
11/11/17 8:29 pm
Joined: Jan 2006
Posts: 10
Elkgrove California
G
Glenn R Offline OP
BritBike Forum member
Glenn R  Offline OP
BritBike Forum member
G
Joined: Jan 2006
Posts: 10
Elkgrove California
The research has shown that their is a original bike with that same number that is all together. Wish I could find that owner to confirm this. I have seen a picture of the original numbers for that bike. Numbers on my engine do not match the stamping in that picture. Calif registration of my other bike has Frame number and engine number, which is confusing, 1955 Frame, 1950 engine, registration calls it a 1950 motorcycle, on the title from 1981.


Moderated by  John Healy 


Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.6.1.1