Triumphrat

Hack Wilson · 07-01-2009, 11:45 PM

Hello, I'm new here and grateful to have found this place. Hope I can contribute as well as learn something new....

I'm considering a big bore project for my 1974 Trident 150V (the biker in my pic). What will this accomplish? More horsepower, speed, or what? Also, any risks or drawbacks?

I love this bike, have had it for 10 years and it's time to give it some real beef. My idea or goal is to make it superbike-like, as it's already got the cafe racer bars and three-into-one exhaust.

Gawd, I love Triumphs!

ivar · 07-02-2009, 06:12 AM

No hands on knowledge with the old triples, but was at a rally in june, where a gentleman had a 69 BSA RIII with a bigbore kit. (N.Hyde??) According to my buddy, the bike went pretty good with the kit.

And when he fired it up - what a hair raising sound out of those coctail shaker "mufflers"

Would like to have one of those Tridents in the stable some time...

GrandPaulZ · 07-02-2009, 09:31 AM

Welcome, Hack.

The thing to do is make sure you re-jet your carbs appropriately so as not to lean out the engine and burn it up.

You'll get a bit more take-off, a bit more power on accelleration, and a bit more top end. NOT MUCH for all the work and expense (in my opinion).

If you also change the cams, have the head mildly ported, and install a Tri-Spark electronic ignition, you'll wake the bike up noticebly. Of course you'll spend more money, time and effort, but the results are a better value if you've got the "play money".

No mistaking that metallic banshee howl when a Triumph triple "comes on the pipe"; I've got (2) 74s and a 75 e-start.