Model: 1999 Thunderbird (standard)

Carbs: Keihin CVK
Airbox: K&N in standard filter box w/ 5 x 1.5" holes
Pipes: Stock
Muffler: TORs
Cams: Stock
Ignitor: Stock

Main Jets: #120 Keihin
Needle: Thruxton needles
Float Height: 17.5mm
Pilot Jets: #40
Mixture Screws: ~ 3.0 turns
Plugs: DPR7EA-9

Butt Dyno Results:
Small throttle operation good. Smooth to 7000 rpm, no bucking or audible misfire.

WOT test:
Better WOT operation with Thuxton needles at low and mid RPM. Thanks Jimmy!

Model 97 Thunderbird

1 Mikuni carbs taken off and replaced with Keihin CVK carbs off a 2001 model

2 Airbox in the bin - fitted pod filters S&B maxi-flow 125-RC-T conical (2.25x3.5x2x4) onto the Keihin CVK's. These are totally "free flow" and would give the same air flow as no filters at all. Air inlet (bellmouth) size is 57mm (CVK's only, Mikuni are different size)

3 Restrictive intake rubbers (with dimple) replaced with unrestricted (smooth) intake rubbers. The unrestricted rubbers should be standard with Keihin CVK carbs

4 Standard spark plugs changed for NGK Irirdium DPR8EIX-9

5 Main #98 jets replaced with #120 jets - This works perfectly the plugs are just the right colour (I live at sea level). Jimmy reckons it might be worth trying #125's but the risk is it might run rich at 5000 rpm to 7000 rpm

6 Copper washer under each carb needle - didnt seem to make any noticable difference but did it anyway. The needles on CVK carbs are not adjustable.

7 Mixture screw taken another full turn out

Everything else is stock ! Fuel is standard 95 RON.

Picture at:

http://www.triumphrat.net/hinckley-c...120-mains.html

Im so pleased with the result I havnt bothered fiddling around anymore, The bike really smooths out at 4000 rpm to 5000 rpm and the iduction roar is fantastic bearing in mind the exhaust is standard. The economy as well as the power has noticably improved, I get about 20 more miles per tank. Recommended !

Originally Posted by bkline

Model: 1996 Adventurer Carbs: Mikuni Airbox: K&N in stock airbox w/ 4 1.5" holes in the back Exhaust: Thunderbike 3-into-1 Cams: Stock Ignitor: Stock Ignition Rotor: Factory Pro Ignition Rotor Advancer (+4 degrees) Main Jets: 145 Needle: Dynojet, 2nd notch from the top Float Height: 17.5mm Pilot Jets: 40 Air/Idle Screws: 2.5 turns out Notes: Haven't gotten around to the dyno yet, but pretty steady torque according to the butt dyno. It pulls so well now that I installed a 19T front sprocket. I was willing to trade a little torque for the lower revs on the highway. It's like adding a 6th gear.

This Winter, chucked the airbox altogether and went with K&N pods:

Model: 1996 Adventurer
Carbs: Mikuni
Airbox: K&N pods
Exhaust: Thunderbike 3-into-1
Cams: Stock
Ignitor: Stock
Ignition Rotor: Factory Pro Ignition Rotor Advancer (+4 degrees)
19T front sprocket

Main Jets: 155
Needle: Dynojet, 3rd notch from the top
Float Height: stock
Pilot Jets: 40
Air/Idle Screws: 2 3/8 turns out

__________________
1996 Cafe Adventurer Project
http://www.triumphrat.net/memberalbu.../14456/cat/500

Dyno results
I've posted my dyno results under my "member album" as I've not been able to shrink them down to 800x0 and post them up. whp 73 torque 52ftlbs
Mods are pod filters (K&N) and BC preditor pipes. tell me what you think.

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I think your radar must be off...

What about your jetting, etc. I know you had to change something to get it sorted with PODS on there.

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Cheers,Denny

Originally Posted by denny

What about your jetting, etc. I know you had to change something to get it sorted with PODS on there.

final jetting mentioned in second pic, Shimmed needle (should be .030 as rewritten on a second sheet) .055/M J152.5.
I'm assuming the J = jet and size is 152.5??? Keep in mind I did NOT perform this rejetting myself.

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I think your radar must be off...

Model: 1999 Adventurer

Carbs: CVK, no mods
Airbox: None- 3 K&N Pod/Filters
Exhaust: Stock, w/ baffles removed
Cams: Wilcox Engines.
Ignitor: Stock
Ignition Rotor: Stock

Coils & Spark Plug Wires: Nology

Main Jets: 120, FP
Needle: Stock, no change
Float Height: 17.5mm
Pilot Jets: 40, FP
Air/Idle Screws: 2.5 turns out

Seems to work....

Model: 1998 Tbird

Carbs: Mikunis
Airbox: Stock K&N Filter, air inlet 'foam silencer' removed
Intake rubber 'restrictor' reduced by est. 8-10% (area)
Exhaust: Thunderbike 3 - 1
Cams: Stock
Ignitor: Stock
Ignition Pick Up: Est. 2 deg advance filed from mount holes (rotor circumference ~ .65mm / degree

Coils: Nology

Main Jets: '98' dynojet
Needle: dynojet 3rd notch from top
Float Height: 14.0 mm
Pilot Jets: 40
Air/Idle Screws: 2.5 turns out

G/box sprocket 19 tooth

Great torque thru' whole rev range, pipes loud but great sound.

Now fitted unrestricted inlet rubbers T1240080 -
No jetting or needle changes needed, stronger in midrange than before, top end & low end as strong as before.
Torque curve feels strong, flat & smooth from ~ 1,500 rpm to redline.

Couple of things to add to my last post....

Checked my fuel economy also - 54 miles per gallon (Imp.) over 110 miles mix of slow mountain twisties & 100kmh (62mph) main roads.

Pleasantly surprised after reading test reports ~ 43mpg.

Clearly more power from improving air/exhaust flow can also mean good engine efficiency. (Probably 19t front sprocket also helps here - reccommend for 5 speeders where power mods done.)

Not sure if this fits here, but have just fitted Racetech Cartridge Emulators to forks. On Ireland's bumpy roads suspension matters, & as murphy's law has it, the worst bumps & potholes are on bends ! Cartridge emulators have made a massive improvement to brake dive & general front end control. I've kept the stock springs for now - I'm only 150lbs so no big deal. At $160 for parts (self fitted), for my weight & Ireland's roads these are easily best bang per buck of any mods I could make imho.

Hey Mike,

Did you change out the rubbers or remove some of the material on the inside of the rubber? Having Mikuni's, the unrestricted rubbers for the Keihens are not a fit. I was also told that Tiger's using Mikuni's had unrestricted rubbers but i cannot confirm. Let me know.

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