Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Groups] - [Classified Ads] - [Subscribe] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® General Discussion > Antique Motorcycles
Forgot Password? Join Us!

Notices

Antique Motorcycles All about finding and fixing old motorcycle engines and vintage bikes.

Antique Motorcycles

Starting a full restoration on my 1967 Triumph T20SM Tiger Cub


this thread has 11 replies and has been viewed 1027 times

Reply
 
Thread Tools Display Modes
  #1  
Old 12-16-2018, 09:30:49 PM
Motorhead's Avatar
Motorhead Motorhead is offline
Subscriber
 
Join Date: May 2007
Location: Central Coast, California
Posts: 5,211
Thanks: 3,079
Thanked 4,152 Times in 2,026 Posts
Default Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

I have a history with Triumph Motorcycles...A LOVE-HATE relationship. I had my first Triumph, a 1967 200CC Tiger cub when I was in High school in 1969. It was broke more than it ran.
Around 1971, I bought a 1967 Triumph 500, T100C which was a single carb, 500 twin with with the up-swept pipes. I rebuilt it and put a twin carb Daytona head on it and I was "Steve McQueen jr" in the dirt and street. I was 22 yrs old and bullet proof. I sold it a few years later. Roll ahead 18 years, 1992, and at 40, I buy this 1967 Tiger cub from a friend of mine with about 2700 miles on it. I enjoy it around town trails and such. I would take it to the beach areas of Los Angeles in my truck when I and my family would visit my parents. 2009 was the last year the Cub was registered and I parked it.
So now 66 yrs old and the clock ticking away on my motorcycle riding days left, I pulled it out, pulled the engine and today I got the engine most the way torn down. I have a roller crank pin to put in it, newer Amal Concentric carburetor, An "R" cam and I am sending the cases to a guy back east that will do some machining on the case to make it more "Oil Tight". He will build the crank for me as it consists of three pieces, right and left flywheel and crank pin. It needs to be pressed apart, new pin installed with the rod and then balanced and set up between centers and set up with two dial indicators. He will install high grade valve guides and bore the cylinder to fit a larger Japanese bike piston that seals better with good rings.

The FRAME, I will take completely apart after the engine is done and have it powder coated, the tank repainted, install a single Trials seat and alloy rims with Stainless steel spokes. So here is a picture of it as it sat before I took it apart. I will post as I build it. Wish me LUCK and PATIENCE because it is BRITISH!
Attached Thumbnails
Click image for larger version

Name:	091 (1280x960).jpg
Views:	222
Size:	177.1 KB
ID:	324581  
__________________
My 1939 WILLYS Pickup.
Bought in 1971
Reply With Quote
The Following 10 Users Say Thank You to Motorhead For This Post:
Sponsored Links
  #2  
Old 12-16-2018, 10:03:20 PM
bartlett0815 bartlett0815 is offline
Registered
 
Join Date: Aug 2013
Location: Wilmington, NC
Posts: 270
Thanks: 15
Thanked 374 Times in 119 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

Motorhead,
That looks like a fun bike. I took my '44 Harley-Davidson WLA out for a spin this afternoon. I don't ride nearly as much as I used to. I need to ride more. I don't have any experience with British bikes but I do have a 1968 Triumph Spitfire that I drove the crap out of in the mid 80's. I plan to get it back on the road before I'm dead. There's a special feeling that comes with riding/driving a vintage machine that everyone else can't believe is actually running. Good luck with your bike and keep us posted.
Kevin in Wilmington, NC
Reply With Quote
  #3  
Old 12-17-2018, 11:42:13 AM
Radiomike Radiomike is offline
Registered
 
Join Date: Feb 2013
Location: Pincher Creek, Alberta, Canada
Posts: 511
Thanks: 0
Thanked 250 Times in 176 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

I had a tiger Cub back in the early 1960's. Fun bike my wife to be and I did a lot of miles on it. Needed regular TLC but we never broke down. It replaced an earlier triumph terrier of 150cc. In the end I sold it and brought a 500cc Velocette Venom, which I still have.

The Electrics were a weak spot, keeping all the connectors clean and greased with vaseline was a good investment; as well as ground ground return connections. I use valve regulated AGM batteries now, no acid spills.

Mike
Reply With Quote
  #4  
Old 12-18-2018, 12:43:54 AM
ulgydog56's Avatar
ulgydog56 ulgydog56 is offline
Registered
 
Join Date: Dec 2017
Location: Smithcreek, Michigan
Posts: 692
Thanks: 99
Thanked 312 Times in 236 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

love britt bikes, they handle well and fun, had a 68 bonnie back in the day, amel carbs are a pain and electrical not great. but that's part of it...
Reply With Quote
  #5  
Old 12-18-2018, 01:32:59 AM
OnanParts's Avatar
OnanParts OnanParts is offline
Sponsor
 
Join Date: Nov 2008
Location: Pacific Northwest, USA
Posts: 1,083
Thanks: 107
Thanked 1,509 Times in 605 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

Got popcorn n cold beer!

Restored my first Triumph, a 1968 T120R Bonneville, back around 1985. Everything torn down to the last English nut and bolt.... Still have it, been in storage a long time now though.

I'll have to dig around for a few of the after pics, this pic is from when most of the chassis was done. Ended up pulling the twin carb head and going with a single carb head. Zero problems with that "one" anal carb......

Also no visits from the Prince of Darkness! Custom rewire, aftermarket regulator/rectifier combo etc. 30K+ miles and it always got me home. A bit shaken, but not stirred!
Attached Thumbnails
Click image for larger version

Name:	T120Ra.jpg
Views:	100
Size:	108.5 KB
ID:	324627  
__________________
https://www.onanparts.com
Reply With Quote
The Following 2 Users Say Thank You to OnanParts For This Post:
  #6  
Old 12-18-2018, 02:41:47 AM
Motorhead's Avatar
Motorhead Motorhead is offline
Subscriber
 
Join Date: May 2007
Location: Central Coast, California
Posts: 5,211
Thanks: 3,079
Thanked 4,152 Times in 2,026 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

About 5 years ago, I bought a one owner, 1970 Triumph Bonneville. It had been mostly restored but someone had not done the best job with it. The paint and trim was real nice. I guess in the years between owning my 500 trophy and the Bonneville, I forgot what Ba$tards Triumphs are to work on. i took the twin carb head off and it was junk. I had to find a good used Bonneville head which was a bugger to find and have it completely rebuilt. It needed pistons and rebore, the clutch slipped and all that had to be rebuilt. By the time I had it all straightened out, I realized I didn't want all the trouble in a bike I wanted to ride distances. I sold it and exported it back to England.
I replaced the Bonnie with a 2007 BMW R1200GS. Now THAT'S a BIKE. Turn the key, push the start button and it flies!
I have kept the Cub for Posterity!
Attached Thumbnails
Click image for larger version

Name:	photo (2).jpg
Views:	88
Size:	163.2 KB
ID:	324628   Click image for larger version

Name:	photo.jpg
Views:	89
Size:	173.7 KB
ID:	324629   Click image for larger version

Name:	IMG_2377 (1280x960).jpg
Views:	91
Size:	229.9 KB
ID:	324630   Click image for larger version

Name:	IMG_2376 (1280x960).jpg
Views:	81
Size:	236.7 KB
ID:	324631  
__________________
My 1939 WILLYS Pickup.
Bought in 1971
Reply With Quote
The Following 3 Users Say Thank You to Motorhead For This Post:
  #7  
Old 12-19-2018, 12:34:26 AM
ulgydog56's Avatar
ulgydog56 ulgydog56 is offline
Registered
 
Join Date: Dec 2017
Location: Smithcreek, Michigan
Posts: 692
Thanks: 99
Thanked 312 Times in 236 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

old triumphs are classics thow, fun to ride on short trips, the thing with the twin carbs is you always had to syncro the carbs every few rides. I used my tach on the bike and pulled 1 plug wire off at a time and adjusted each carb to the same rpm, easy way to set the carbs.......

Last edited by ulgydog56; 12-20-2018 at 12:28:46 AM.
Reply With Quote
  #8  
Old 12-20-2018, 01:32:24 AM
Motorhead's Avatar
Motorhead Motorhead is offline
Subscriber
 
Join Date: May 2007
Location: Central Coast, California
Posts: 5,211
Thanks: 3,079
Thanked 4,152 Times in 2,026 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

Yesterday and today, I finished the stripping of the engine and started inspecting what parts I want to replace. I cleaned the one case half that has the clutch and primary drive installed. The first picture is the mickey mouse seal Triumph used to try to seal the main input shaft that runs partly through HIGH gear that is mounted in the opposing case half that holds the transmission. The main input is mounted to the multi disc, wet clutch and then goes through the primary case half, through a 1.5 inch long bushing that is pressed into high gear that the final drive chain sprocket is mounted to. If left the STOCK way, if you needed to change the front final drive sprocket, you had to split the engine cases! He will machine out the hole on the case to about 4 inches and make up a modern seal plate to better seal the input shaft. It also lets you change the front sprocket without splitting the cases. Picture 4
The crank is merely pressed together from 3 pieces, the flywheels and the crank pin. Guys that raced the Cubs with high horsepower, once they pressed the crank together, set it up between centers in a lathe and wacked one or the other flywheel with a rawhide hammer and checked with two dial indicators, actually tack welded the crank pin to the flywheel to avoid them shifting under high load. I will have the plain Babbitt circular insert pressed out of the big end of the rod and an ALPHA ROLLER caged big end pin installed.
The head looked good, it is a Hemispherical design. It had a nice factory intake port and polish done to it. Unfortunately, Triumph used cast iron valve guides and they wore out fast. I will put ROWE, Ampco 45 alloy valve guides consisting of copper/nickel/aluminum/iron/manganese and new Hepolite valves.
For better oil control, The machinist uses a piston from a Japanese bike with three piece oil ring and a bit larger OD piston wrist pin.

I will install an aftermarket primary chain tensioner. The mag on the crank is an ignition only. I will switch from the 6 volt, EXTREMELY finicky LUCAS (Prince of Darkness) Energy Transfer, alternating current, ignition and lighting system to a 12 volt, no battery electronic ignition system with lighting provisions.
December 28th, I go in for a Left Knee meniscus surgery. So I will not be working on the bike for a DAY or two!
Attached Thumbnails
Click image for larger version

Name:	IMG_4034 (1280x960).jpg
Views:	48
Size:	268.7 KB
ID:	324762   Click image for larger version

Name:	IMG_4035 (1280x960).jpg
Views:	54
Size:	167.9 KB
ID:	324763   Click image for larger version

Name:	IMG_4037 (1280x960).jpg
Views:	51
Size:	210.2 KB
ID:	324764   Click image for larger version

Name:	015[1].jpg
Views:	49
Size:	117.4 KB
ID:	324765   Click image for larger version

Name:	TRIALS_CUB_2007_017[1].jpg
Views:	56
Size:	146.1 KB
ID:	324766   Click image for larger version

Name:	061[1].jpg
Views:	53
Size:	134.9 KB
ID:	324767  
__________________
My 1939 WILLYS Pickup.
Bought in 1971
Reply With Quote
  #9  
Old 12-20-2018, 03:24:00 AM
Contaucreek's Avatar
Contaucreek Contaucreek is offline
Subscriber
 
Join Date: Jul 2007
Location: Proudly Canadian
Posts: 2,710
Thanks: 2,160
Thanked 2,815 Times in 1,128 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

I wrench British surface grinders at work. The English tend to use 17 parts to do the job of 4 and fool you with Whitworth threading just to make lost fasteners an impossibility to replace
Nice machines guys and good luck with the project MH
Reply With Quote
  #10  
Old 12-20-2018, 03:39:06 AM
Motorhead's Avatar
Motorhead Motorhead is offline
Subscriber
 
Join Date: May 2007
Location: Central Coast, California
Posts: 5,211
Thanks: 3,079
Thanked 4,152 Times in 2,026 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

Between the Whitworth fasteners and Lucas electricals, it is easy to go NUTS!
__________________
My 1939 WILLYS Pickup.
Bought in 1971
Reply With Quote
  #11  
Old 01-07-2019, 03:05:17 PM
OnanParts's Avatar
OnanParts OnanParts is offline
Sponsor
 
Join Date: Nov 2008
Location: Pacific Northwest, USA
Posts: 1,083
Thanks: 107
Thanked 1,509 Times in 605 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

Slacking off Motorhead!

This is the T120R after I was done restoring it. The 6" over forks were eventually replaced with originals. Tried stock exhaust and hated it so stayed with the 2 into 1.
Attached Thumbnails
Click image for larger version

Name:	T120Ra.jpg
Views:	41
Size:	716.2 KB
ID:	325903  
__________________
https://www.onanparts.com
Reply With Quote
The Following User Says Thank You to OnanParts For This Post:
  #12  
Old 01-07-2019, 03:30:33 PM
Motorhead's Avatar
Motorhead Motorhead is offline
Subscriber
 
Join Date: May 2007
Location: Central Coast, California
Posts: 5,211
Thanks: 3,079
Thanked 4,152 Times in 2,026 Posts
Default Re: Starting a full restoration on my 1967 Triumph T20SM Tiger Cub

Quote:
Originally Posted by OnanParts View Post
Slacking off Motorhead!

This is the T120R after I was done restoring it. The 6" over forks were eventually replaced with originals. Tried stock exhaust and hated it so stayed with the 2 into 1.
NICE 650 OP! Although I didn't care for the bulky lighting on the last of the 750's, a friend of mine had one that had been "Massaged" a little and it also had the 5 speed trans. That bike was very quick.
I'm 66 now but when I was about 20, I worked at a small independant VW repair shop. The Owner had a flat track 650 punched out to 750 that he raced at ASCOT Raceway in Gardena Ca. It ran alcohol fuel, constant loss ignition and it as a Red Line stretched racing frame. Well, the owner was gone on a trip to Mexico so I wanted to ride this bike. I charged up the battery and terrorized the back streets of my home town of Manhattan Beach, Ca. MY God was that thing fast and as I recall it only had a very small, one wheel brake. That was my thrill for the day.
Getting parts together to send to NJ to the "CUB" guy.
__________________
My 1939 WILLYS Pickup.
Bought in 1971
Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Canada Centennial Celebrations and Parade (1867-1967) Caledonia Ontario - 1967 casertractor Smokstak Canada 0 08-20-2018 01:38:15 PM
1967 Cub Cadet 102 Restoration Mike in NC Garden Tractors and Mowers 7 08-03-2016 08:35:07 AM
Case SO Orchard /Grove 1947 – Full Restoration JFLingg Antique Farm Tractors 1 01-16-2014 11:48:57 PM
IHC 6 Hp Famous Full Restoration Bob Hanauer Hit & Miss Gas Engine Discussion 20 02-22-2013 08:53:06 PM
Starting my first restoration project theo b Hit & Miss Gas Engine Discussion 6 06-28-2008 02:16:31 AM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 08:53:10 PM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2019 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277