Triumph Thunderbird Sport Owners, Clubs, Email lists and Resources: A wBW page that has alisting of Triumph email lists and groups, with information on how to join | Triumph Classics listfor “Discussion of Hinckley Triumph classic motorcycles, including the Adventurer, Legend, Thunderbird and Bonneville” | Triumph Rat has all sorts of information on Hinckley Triumphs
Thunderbird Sport Mufflers – Silencers:Epco now has a pattern for the TBS. Here’s a note from wBW Visitor “S.H.”: “Rick, I picked the Epco name off your site and dropped them an email. They make stainless mufflers for classic Euro bikes, Harleys, and hotrods. I asked about making me a set for my 2000 TBS. Tom is a great guy to work with, answered all my questions, used my stock mufflers as a pattern and made his first set for a Hinckley Triumph | More on the Motorcycle Exhaust Systems page
From “J.D.” (8/10): “I recently found your site while trying to find a solution to my Triumph ignition problems. After reading your article on Nology coil conversions, I tried it and my problem is gone. Thank you.
I thought I’d share some Triumph experiences with you. I have a 1995 Sprint 900 that I have played with for 8 years. I too experienced the poor throttle response and general lack of performance. I knew this motor was capable of more than I was getting.
My bike has the Mikuni 36mm BST’s. After installing a pair of Micron slip-ons, I knew that I would have to increase the jet sizes to get any benefit. In fact, the engine would barely run now with the stock 112 main jets in place. I tried going up to 225’s like recommended by other Triumph owners. I found it still exhibited signs of lean mixture.
The next step was to remove the side air boxes. These are only there to attenuate noise anyhow. I left the filter box in place. This made another jet change necessary. I settled on 137.5 mains.
The bike now has great throttle response and I feel I am now getting the power this engine is capable of. The mixture does not seem excessively rich even though I am at 3000 ft. elevation.
A couple of other tips. You may have to raise the needles a notch or two to tune out any off-idle dead spots. I run my idle screws at 2 turns out. I also fabricated some small vacuum tubes between the carburetor vacuum ports. This seemed to stabilize the idle somewhat.
Feel free to try these tips on one of your carbureted Triumphs. It may give you some new ideas for these great old bikes.”