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| Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler |
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12-23-2007
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#1 (permalink)
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Senior Member
Formula Extreme Favorite Bike: Bonneville 07, "Bonnie"
Join Date: Aug 2007
Location: saint augustine, florida, notheast florida
Posts: 456 Other Motorcycle: Past rides, 66 bonneville Extra Motorcycle: Past rides, 72 bonneville
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shifting speeds
Here's an interesting one.....
Can anyone tell me where the shift points (ie redline) would be on the speedometer?
Since I won't likely get a tach conversion kit for a while, what I'd like to do is to mark on the speedo with a little dot of white-out, just where, or at what mph i should be shifting up to each gear from first to fifth......ie/ 40 mph in first, 65mph in second...etc etc....
I've been looking everywhere for that info, found some on the 02 bonnies but nothing yet on the 07 which i have.
Any help or suggestions would be greatfully appreciated....
Thanks...
bill
__________________
Mods: snorkel removed, bafflectomy, jets out 3 turns, summer screen, cortec tank/saddlebags, Bella Corse Highlander bars,Modre peg lowering kit,Drag specialties mini tach, D9 bracket.
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12-23-2007
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#2 (permalink)
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Senior Member
SuperStock Favorite Bike: 1968 bonneville
Join Date: Sep 2007
Location: santa paula ca
Posts: 219 Other Motorcycle: 2007 blk/wht bonneville
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I rarely use my tach. I hear the pipes and just feel for it.
__________________
I have only been drunk twice...the 60s & 70s
2007 T100,Blk/Wht,Ai removed,D&Ds,Snorkel out,restrictor plate out/one shim/ 132mains/40 pilots/3 turns
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12-23-2007
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#3 (permalink)
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Senior Member
Team Owner Favorite Bike: 2003 T100
Join Date: May 2005
Location: Hudson, Ohio - USA
Posts: 3,702 Other Motorcycle: 1991 BMW R100GS Extra Motorcycle: No more at present time
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If you have the 2002 data, this may help.
As far as I know, the only difference in stock 2002 and 2007 drive ratios is in the final drive, with an 18 tooth countershaft sprocket vs a 17 tooth. I believe the primary and 1 thru 5 gear ratios are the same.
I think this math works:
2002 final drive: 2.53:1
2007 final drive: 2.38:1
2.53/2.38 = 1.06 or approx 6 % difference.
In other words, the 2002 will be revving approx 6% higher at the same road speed with stock gearing.
Not sure if you'd need to run this for every gear ratio, or if this covers it for all ratios. Think it does.
Bob
__________________
2003 T100 (790cc) Lucifer Org and Silv: 122/42 jets, TORs, 17T, UNI filter, no AI, Polaris bellmouth, Metzeler ME880 tires, Progressive 440 shocks (105/150 springs),11-1126 fork springs, gaiters, MotoTwin low bars, 6024 lamp, htd grips, 12v outlet.
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12-23-2007
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#4 (permalink)
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Member
Supersport 400
Join Date: May 2007
Location: Athens, GA USA
Posts: 91
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Aproximate redline (7000rpm)
I tested this on my 2006 Bonnie that has TORs, rejet, and K&N, no snorkel. I tried to keep track of what speed I shifted when the tach hit 7000 rpms:
1st - 50
2nd -70
3rd - 85
4th - 95
That is what my speedometer showed but it is about 5mph optimistic, so actual speed would be about 5mph less than what I listed. Also, I didn't bounce the rev limiter so pushing it as far as you could go would result in slightly higher speeds.
__________________
'06 Bonnie Black - AI and snorkel removed, TORs, K&N, IKON rear shocks, Hagon fork springs, Pingel, Tach added, K&Q seat, centerstand, Lucas Style Sport lights
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12-23-2007
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#5 (permalink)
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Senior Member
Moto Grand Prix
Join Date: Jun 2005
Location: Stuart Fl
Posts: 3,171
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Speed in Gears
Sponger has it rite on cept for me its 2 mph less till it hits the limiter.
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CAPT D
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12-24-2007
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#6 (permalink)
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Senior Member
Supersport 600
Join Date: Mar 2007
Location: Wappingers Falls New York
Posts: 185
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Quote:
Originally Posted by sponger
I tested this on my 2006 Bonnie that has TORs, rejet, and K&N, no snorkel. I tried to keep track of what speed I shifted when the tach hit 7000 rpms:
1st - 50
2nd -70
3rd - 85
4th - 95
That is what my speedometer showed but it is about 5mph optimistic, so actual speed would be about 5mph less than what I listed. Also, I didn't bounce the rev limiter so pushing it as far as you could go would result in slightly higher speeds.
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You are shifting at 7K? On what model 865 or 790c? Was this just a test?
I shift at about 4500 - 5000 RPM on an 865 Bonnnie.
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2007 Bonnie Black, M-Bars, NARK, 140 mains, 42 Pilots, Triumph City Bag Black, -20 mm Hagon Rear Shocks, Hagon Progressive Fork Springs
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12-24-2007
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#7 (permalink)
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Senior Member
Moto Grand Prix Favorite Bike: Definitely my 2007 Black
Join Date: May 2007
Location: Stamford, CT
Posts: 3,012
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Quote:
Originally Posted by JKDJose
You are shifting at 7K? On what model 865 or 790c? Was this just a test?
I shift at about 4500 - 5000 RPM on an 865 Bonnnie.
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You shift around 4500-5000 RPMs? Hell son, your missing an awful lot of fun! 
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12-24-2007
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#8 (permalink)
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Member
Supersport 400
Join Date: May 2007
Location: Athens, GA USA
Posts: 91
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Quote:
Originally Posted by JKDJose
You are shifting at 7K? On what model 865 or 790c? Was this just a test?
I shift at about 4500 - 5000 RPM on an 865 Bonnnie.
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I don't shift at 7K usually, only ocassionally when I jump on it. I usually don't go past 5K or so during normal riding...
__________________
'06 Bonnie Black - AI and snorkel removed, TORs, K&N, IKON rear shocks, Hagon fork springs, Pingel, Tach added, K&Q seat, centerstand, Lucas Style Sport lights
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12-25-2007
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#9 (permalink)
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Senior Member
SuperBike Favorite Bike: 03 T100 989
Join Date: Mar 2007
Location: richmond va
Posts: 1,572
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Quote:
Originally Posted by Hedge
You shift around 4500-5000 RPMs? Hell son, your missing an awful lot of fun! 
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You got that right 5000 to 8000 is where the fun is.Love the feeling shifting into 4th at 95 mph thats when she is moveing.
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