Wednesday, December 24, 2008
A good year for me...
...but an unproductive one in the tool shed. The arrival of my son, Arlo, has put a postponement on any projects. Watch this space, too far in to give up now!
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A well fettled Triton built by Ace Classics.
Gearbox ratios are for a standard four speed AMC gearbox.
To return the script default values use refresh in your browser plus the control key.
Introduction...
Nine years ago I moved from London to Seattle, WA and once I settled down and figured that I would be here for a while it was time to find a cool ride to keep me busy and out of the pub. I settled on a 1942 BSA M20 - an old English army bike on which I could relive all of my Steve Mcqueen fantasies of exciting chases and jumping barbed wire fences.
After much searching I found the bike I was looking for, rough but complete, and after two years banging away in the tool shed I emerged proud as punch and ready to take on the streets. I took my motorcycle test and I was soon racing around trying to escape from prisoner of war camps. Now anyone that has ridden one of these old BSA's will know that you are not going to be able to escape from anyone, and the thought of getting airbourne to flee the country, well, it just isn't going to happen.
Four years later, and I started to realise that 60 mph is a bit of a crap top speed, and suspension might make rides over 2 hours a little easier on the back and arse. So I started hunting for a new project. I came accross a 1956 Norton Dominator Featherbed frame complete with Roadholder forks and decided a Triton was going to be the next project. I soon found a 1958 Triumph T110 650cc motor and a Norton Gearbox (thanks to our friend Ebay) and the major components were there. Atleast that is what I thought.
This blog is an attempt to catalogue my struggles of putting this bike together. Be patient, it might take some time....
The goal...
A well fettled Triton built by Ace Classics.
Blog Archive
Gearing Calculator
Gearbox ratios are for a standard four speed AMC gearbox.
To return the script default values use refresh in your browser plus the control key.
Smiths Chronometric Speedo Fitment
The calculation for determining the speedo series number is
1680 x A/B, where
A is the number of turns of the speedo cable for six turns of the rear wheel;
B is the radius of the rear tire in inches;
1680 is a constant.
Find the drive ratio as described in my post above. Let's say it's 2:1. Let's also say the tire radius is 13.1 inches. The calculation then is 1680 x 6 revs x 2(drive ratio) divided by 13.1 inches equals 1538.9. This number is within 10% of 1600, so in this case a 1600 series speedometer head is required. (A 15 to 12 drive will alter the number to 962, in which case a 1000 series speedo is required.)
This gets you to within 10% which is the adjustment range of a Smiths unit. The final tweaking can be done internally by a specialist. Or the unit might be spot-on, as is.
1680 x A/B, where
A is the number of turns of the speedo cable for six turns of the rear wheel;
B is the radius of the rear tire in inches;
1680 is a constant.
Find the drive ratio as described in my post above. Let's say it's 2:1. Let's also say the tire radius is 13.1 inches. The calculation then is 1680 x 6 revs x 2(drive ratio) divided by 13.1 inches equals 1538.9. This number is within 10% of 1600, so in this case a 1600 series speedometer head is required. (A 15 to 12 drive will alter the number to 962, in which case a 1000 series speedo is required.)
This gets you to within 10% which is the adjustment range of a Smiths unit. The final tweaking can be done internally by a specialist. Or the unit might be spot-on, as is.
Motorcycle links
- Britbike Forum
- Clubman Racing Accessories
- Disco Volante Moto
- Dresda
- European Motorcycles Inc.
- Fair Spares America - Norton Parts
- Independent Ignition Supplies - Magneto Spares
- International Title Service
- Johnson Motors
- MAP Cycle
- McIntosh Racing - Norton Manx Part Suppliers
- Morgo - Makers of big bore kits
- Norvil Motorcycle Spares
- Old Brittts - Norton parts in Seattle WA
- Royton Precision Tooling
- SRM Engineering
- The Tank Shop
- Tri-Cor England
- Triumph.com - not what I expected!
- Unity Equipe
Other Links
- Curry Frenzy - more curry recipes than you can shake a stick at.
- New Model Army - coming soon to a town near you (probably)
- Nice Cup Of Tea And A Sit Down
- Sad Kermit - and who can blame him.
- Timothy Hull - Good friend, musician and curry cook extrodinaire!
- Timothy's adventures in Portland and the rest of the planet. But mostly Portland. (Now available in blue.)
- Unravel Massage and Bodyworks - Langley WA
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