Triumphrat

sean_x · 08-01-2007, 06:38 AM

Hi,

There's lots of talk about improving power and tuning these bikes, but the results seem to lead towards top-end power.
How can I increase the bottom-end torque of my TBS, as its in the bottom and mid-range that I ride 99% of the time.
Would any kind of jetting or pipe/airbox changes help, or would I have to get into cylinders, pistons and timing?

Cheers,
Sean

BadMouth · 08-01-2007, 08:17 AM

A three into one exhaust will get you a little extra grunt. Open up the airbox and rejet(a lot of headaches) to get a little more.

If you want even more, you'll need higher compression via super III pistons or shaving the head.

None of these options is cheap.

jimmyj900 · 08-01-2007, 07:30 PM

Quote:

Originally Posted by sean_x

How can I increase the bottom-end torque of my TBS, as its in the bottom and mid-range that I ride 99% of the time.
Would any kind of jetting or pipe/airbox changes help, or would I have to get into cylinders, pistons and timing?

What rpm range are you defining as bottom and mid-range? That info is kind of critical.

Jim

Spooner · 08-01-2007, 07:40 PM

Quote:

Originally Posted by sean_x

Hi,

There's lots of talk about improving power and tuning these bikes, but the results seem to lead towards top-end power.
How can I increase the bottom-end torque of my TBS, as its in the bottom and mid-range that I ride 99% of the time.
Would any kind of jetting or pipe/airbox changes help, or would I have to get into cylinders, pistons and timing?

Cheers,
Sean

I'm with BadMouth...a 3 into 1 will give you a significant midrange boost.

Slinky · 08-02-2007, 03:45 AM

A 3:1 system, opened up airbox & rejet, and/or higher compression sounds like a recipe for a narrower power band higher up the rev range.

A popular mod right now seems to be an ignition rotor with gives a few degrees more advance. This (so they say) gives better low & midrange performance with a slight loss at the top end.

I too am interested in this idea, but I don't know of anyone who makes or modifies a rotor for the Triumph triples.

Napalm · 08-02-2007, 04:09 AM

The Thunderbird uses triumphs mild "blue" cams. The old Trident has great mid range and uses the "green" cams.

Seen side by side the green cams make the lobes on the blue cams look tiny by comparison.

You can buy green cams from a wrecker for £100.

BadMouth · 08-02-2007, 10:01 AM

Quote:

Originally Posted by Slinky

I too am interested in this idea, but I don't know of anyone who makes or modifies a rotor for the Triumph triples.

Factory Pro makes one for pre-98's ($50)
Not sure what the difference is, but I wish they made one for my 2000.

Slinky · 08-02-2007, 10:49 AM

Quote:

Originally Posted by BadMouth

Factory Pro makes one for pre-98's ($50)
Not sure what the difference is, but I wish they made one for my 2000.

Thanks for that info.. I doubt if there is any difference (anyone?). Far as I know only the carbs changed at about that time.

BadMouth · 08-02-2007, 10:50 AM

I sent an email to factory pro with a few questions. If they bother to respond to my pestering with real answers, I'll be impressed. If I don't hear from them, I'm going to order one anyway, then ebay it if it doesn't work.

I'd still like to know why the pre-98 cutoff?

Maybe the ignitor? ....but the earlier & later model are interchangeable (the one on my bike is from a 95 S3)

Maybe the rotor was aimed toward sportier bikes that moved to fuel injection in 98? .......but the switch was in 97

Anyone else want to speculate?

Slinky · 08-02-2007, 02:13 PM

I sent them an email too.

The parts book lists only one part number for the rotor. It lists two different pick-ups, they changed at engine number 56145