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| Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler. |
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01-26-2008, 05:29 PM
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#1 (permalink)
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Member
Supersport 400 Favourite Bike: Thriumph Thruxton 904
Join Date: Jan 2008
Location: The Netherlands
Posts: 84 Other Motorcycle: Triumph Bonneville T 100 Extra Motorcycle: Vespa Scooter (1964)
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More powerful Thruxton!
Hi Guys,
I'm from Holland and last year (2007) I bought myself a new Thruxton (carbs version). Sinds I started to ride this bike, I was missing some power, especially in the higer revs. Before the Thrux I owned a Daytona 1200 and there was never a leake of performance. But, I really love the Thrux, the looks, the style, the sound, the way the bike rides, almost everything. The only thing missing was a surtain final shot of power. After 5.000 revs the speed was gone. So, I decided to do something about this and now I'm involved in a heavenly tuningjob. The whole thing started wenn I bought myself a set of Hot Cams from Thunderbike (NZ). After receiving these things we wanted to build them in the bikes engine. But, because we have to take the cilnderhead of, it seems to be a good idea to do a little porting and flowingjob on the cilinderhead. Then we found out that the stock compression on the bike was very low (9,2:1) and to improve that we also bought the 904 cc Wiseco kit. This must bring a CR of 10.5:1. The stock CVK carbs has to leave also, in stead of them we toke de Keihin FCR 39's. Taking the cilinderhead of we also noticed that the stock valves are quitte small, especially the exhaust valves. For that reason we get ourselfs bigger valves.
The last things I bought was a Barnett clutch and a PRETECH 6 pot caliper. I also get me Wilbers racing suspension (Germany) and a NH steering damper.
We expect the bike to be realy, realy fast en strong after ereything is done. The guy who is doing all the tuning on the engine is a very (VERY) experienced tuner of racingbike engines here in Holland and he expects that the Thruxton will go over 9.000 rpm. Because of that we also have to replace the valvesprings for stronger ones. I will keep you informed about my project, wenn I now how to do it, I will also put some pictures off my project on this forum.
__________________
It's better to burn out, than to fade away...
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01-26-2008, 05:48 PM
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#2 (permalink)
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Senior Member
Supersport 600 Favourite Bike: Thruxton
Join Date: Jul 2007
Location: Kansas City Missouri
Posts: 187
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Well that is one heck of a introduction. Hi and Welcome it will be fun to watch how your Bike turns out.
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LAND of the FREE ....*some restrictions apply. void where prohibited
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01-26-2008, 05:54 PM
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#3 (permalink)
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Senior Member
SuperSport Favourite Bike: 1972 Suzuki TM 250
Join Date: Feb 2006
Location: Millstadt, IL USA
Posts: 1,218
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Welcome Thruxboy! I agree what a greeting. You're doing mods way beyond my wrenching ability and wallet capacity. Can't wait to see some pics. She should be a rocket that's for sure. Enjoy our on-line club and don't be a stranger.
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Stop Global Whining!
Semper Fi!
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01-26-2008, 06:06 PM
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#4 (permalink)
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Senior Member
Supersport 600 Favourite Bike: 06 Thruxton
Join Date: Feb 2007
Location: Bothell, WA USA
Posts: 163
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u cant tease us with that opener, bro, and not post up your pics somewhere. Shoots, post up some before shots at least!  : dont forget the dyno run at the end!
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01-26-2008, 07:09 PM
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#5 (permalink)
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Member
Supersport 400 Favourite Bike: Thriumph Thruxton 904
Join Date: Jan 2008
Location: The Netherlands
Posts: 84 Other Motorcycle: Triumph Bonneville T 100 Extra Motorcycle: Vespa Scooter (1964)
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Quote:
Originally Posted by elDizzle
u cant tease us with that opener, bro, and not post up your pics somewhere. Shoots, post up some before shots at least!  : dont forget the dyno run at the end!
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Here's my bike before, the NZ hot cams from Thunderbike and the mesuring of the cams, I will get you more...
__________________
It's better to burn out, than to fade away...
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01-26-2008, 07:11 PM
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#6 (permalink)
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Member
Supersport 400 Favourite Bike: Thriumph Thruxton 904
Join Date: Jan 2008
Location: The Netherlands
Posts: 84 Other Motorcycle: Triumph Bonneville T 100 Extra Motorcycle: Vespa Scooter (1964)
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[QUOTE=Thruxtonboy;928568]Here's my bike before, the NZ hot cams from Thunderbike and the mesuring of the cams, I will get you more...
Some more...
__________________
It's better to burn out, than to fade away...
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01-26-2008, 07:14 PM
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#7 (permalink)
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Member
Supersport 400 Favourite Bike: Thriumph Thruxton 904
Join Date: Jan 2008
Location: The Netherlands
Posts: 84 Other Motorcycle: Triumph Bonneville T 100 Extra Motorcycle: Vespa Scooter (1964)
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[QUOTE=Thruxtonboy;928571][QUOTE=Thruxtonboy;928568]Here's my bike before, the NZ hot cams from Thunderbike and the mesuring of the cams, I will get you more...
And some more...
__________________
It's better to burn out, than to fade away...
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01-26-2008, 09:52 PM
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#8 (permalink)
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Senior Member
Moto Grand Prix Favourite Bike: '05 Bonnie Black
Join Date: Jul 2003
Location: NE Ohio
Posts: 3,094 Other Motorcycle: '06 Vulcan 500 LTd ~Sue's
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All I can think to say is WOW!!!!!!!!!!!!!!!!
Well, welcome!!!!!!!!!!!!!!!!!!!! Can't forget that!!!!!!!
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Monte
"The Old Ohio Preacher Man"
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01-27-2008, 07:58 AM
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#9 (permalink)
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Senior Member
World SuperBike
Join Date: Nov 2004
Location: North Georgia
Posts: 2,266
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Nice motor set-up your working on! Be very interesting to see what your opinion of the Thunderbike cams are - I've been on the fence for over a year on weather or not to try anything other than the stock cams. I've the bigger intake and exhaust valves, forged HComp pistons, ported, Speed triple valve springs and 42mm HSR flatslides. What do the advantages seem to be with the Thunderbike cams - more lift?? duration??
Their charts seem to indicate large gains at higher RPM - which is fine with me - I generally keep it in the 5000 to rev limiter range when having fun anyway. Keep us posted.
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John W.
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01-27-2008, 08:20 AM
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#10 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Mine...of course
Join Date: Jan 2008
Location: Jacksonville, FL
Posts: 497 Other Motorcycle: 'Zuki GS1100E
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Nice indeedie! Did you coat your valves, or is that just the camera casting the colors? Also, is there anyway you can post the cam lift, intake and exhaust opening and closing events? Thunderbike has be tight lipped on thier cam specs. It seems you may have exactly what some of us have been looking for
Greg
__________________
2001 Black Bonneville 1200cc "High Tuned Son-of-a-Bitch!"
(formerly known as bonnieblackinfl)

Bored, Stroked, and Injected!
Life always gets better after a few gears and a shot of nitrous....
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