Patrol21

I started out working the restricted rubbers a bit, keeping well clear of the indents each side - maybe 8-10% area reduction. Then I checked out a few more posts & compared the fiches for TB & TBS.

TBS cams, airbox, igniter etc. all the same. Just different exhaust....& Keihin carbs with their unrestricted rubbers & same jets, needles etc as the later TB that had Keihin....+14bhp TB to TBS ?...some smoke & mirrors going on here methinks

So figured I had to try those rubbers - they are from Mikuni carbed Tiger, I believe, part # T1240080

The results are excellent, midrange was good before tho' not as strong as low end & top end - now it's stonking torque right thru'

Interestingly, even tho' there was still a huge area difference between my 'worked' ones & the Tiger rubbers, no carb adjustments were needed.

I posted the full info. on the Proven Setups sticky.

It's quite possible the Dynojet parts don't make much difference & may not be worth the bucks. (My stock needles were worn tho') Very likely a 95 main jet, a notch or 2 richer on the needle, & 2 1/2 turn pilot screws will do the job....I would run that past the tech gurus here first tho'.

IMHO the .5 mm richer on the float heights is good for low revs high throttle pull.

Go for it !

Just realised I was already on the Proven Setups sticky

Couple of further thoughts....

That TBS exhaust seems to play a key role here over the TB, cos the airboxes are identical. Maybe it's to do with 'scavenging' - kind of turbo charging on the cheap one cylinder exhaust 'pulse' from a cross connected header can help to 'pull' the charge thru' another cylinder on it's intake stroke. I suspect the Thunderbike 3 into 1 maybe doing just that.

However, it may be that airbox mods can make up for this when using stock headers & TOR mufflers. Tho', as that rear airbox plenum is a 'tuned' resonant (air) circuit, the characteristics at different revs / throttle will be slightly different again...

All I can say is that my TB pulls like train with a 19t front sprocket (11% higher gearing) & still does 50+ (Imp) mpg - result

Thanks to all the posters who gave me the info to do it !

Hi Mike,

Thanks for the tips. I think I'll get with the Tiger rubbers. Cheers!

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The worst day riding beats the best day at work....no exceptions.

Model: 1996 Thunderbird

Carbs: Mikuni
Airbox: K&N in stock airbox w/ 4 1.5 " holes
Exhaust: Yoshimura 3-1 for 96 Speed Triple
Cams: 96 Speed Triple (Green)
Ignitor: 96 Daytona Super III (9700 red line)

Main Jets: 120
Needle: Dynojet, center notch
Float Height: Standard
Pilot Jets: 40
Air/Idle Screws: 2 3/8 turns out
Iridium Plugs
Factory Pro 4 degree ignition advancer

Bike pulls hard throughout the range, slight flattening in the 4-5 range. Pulls real hard on the top end. Dyno'ed at 90 hp right after Yohsi install.

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Scot Dail, IBA #31553
Pack Member, Charlotte RAT

Photo Album

OK, the weather just got warm enough to pull the bike out of the shop and see where my mods stood.....ouch, Im used to hard reving and I have to change my timing.....I am hitting 7500-8000 RPM a ton faster......these bike are stangeled stock. Anyhow, IRLMike/Jimmy, Greg, thanks for the tips..here is what I ended up with

Air-K/N replacement (drilled some airbox holes but ended up too lean) taped them all up. Opening up the airbox is opening up pandora's box. If I have one piece of advise...leave it be or go with PODS (Jimmy's advice)
Mains-after much swiching around, I settled on the higher DYNOJET mains (came with kit)
Pilots-stock 40
Needles-DYNOJET on 3rd notch-made a huge differnce with throttle response
Pipes-removed TOR's and went with EMGO's. Can you hear me now?
Float height-14.5

Have not put on a dyno yet but the butt dyno leaves me tingling and my shift timing has to be much quicker........... But officer, I'm just getting used to the mods.

__________________
The worst day riding beats the best day at work....no exceptions.

just to add from above.....

Unresticted rubbers-Tigers from that year have them...bike bandit had em
one step hotter plug...(not sure if this was necessary)

__________________
The worst day riding beats the best day at work....no exceptions.

Patrol21

Cool

Brief mods to my set up so far:

Fitted Thunderbike 3-1 optional (& removable) 'DB Killer' baffle, cuts the noise down a bit especially at low revs, tho' still way louder than stock. Recommend

No jetting changes made, tho' only a brief trial as I've now changed over to stock Keihins. (Needle Jet/Slider wear gremlins )
All ok & good power but will probably go for a Factory Pro needle kit, as I feel there's a little more 'umph' to be had at low/mid revs which I think the Dynojet needles on Miks did well.

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--__Y
...0-0.......^...........^^u.....^...... Ireland, home of street motocross....

Jazz isn't dead, it just smells funny

Hi Mike,

The mods made a huge difference. I am not running my mains at the settings that I see listed on the forum....120's/130's....seems rich but I may go that route in time. Right now, I am estatic with the pull I am getting. I don't see a huge increase in top end but it gets there a ton quicker. I think going with the unrestricted rubbers made a huge difference..thanks for the part#'s off the old tigers. Anyhow, I have a good friend that I ride quite a bit with that has a Harley with about 4,000 invested in the motor to give it more umph.....we were nearly side by side thru the gears last year......I guess he'll be eating some Trumpet Dust this riding season..bon apetite..see ya!

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The worst day riding beats the best day at work....no exceptions.

I did this:
http://www.triumphrat.net/hinckley-c...ighlight=t150v

Mains, 118
Pilots 40,
Thruxton needles.
I can get my airbox off in seconds, I can get my carbs off in under a minute.
Ridden it over 4,000km now and all over the rev range and in the rain and on +40'C days and had no problems. Definitely more power, and very smooth, plus it cut my 'back off pops' down heaps.

I'll get it dyno'd one day, but I was just happy to junk that cracked plastic wash basin they call an airbox for some steel!!!!

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tridentt150v,
Great Southern Land.
(Where women blow and men chunder).

I tried using part #T1240080 @ my local Triumph dealer and they couldn't pull anything up with it. Is that number specific for an outside company and not an oem #? What year Tiger for the Mikuni unrestricted rubber inlets? I want them, I need them, I've got to have them! Optimum performance please!

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1996 Thunderbird