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Discussion Starter · #1 ·
Top speed?
I have a stock 2002 Bonneville With a windshield.
I weigh 240 pounds
My bike will go 98 mph in 5th gear, unless I go to about 105 in 4th then shift into 5th and
Then it will go at least 110 mph. Is this normal?


[ This message was edited by: hograzer on 2007-02-05 13:26 ]
 

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Some of the Beemers with 'overdrive' 6th gear apparently won't go as fast (top end) in 6th as in 5th. Too much wind resistance for the tall 6th gear, and won't let the engine pull redline. What are you running, a 17 (stock) or 18T countershaft sprocket?

Maybe the same issue with your Bonnie?

Bob
 

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Stock?

Mine will go almost 120 (indicated) and that's even with a 17t sprocket. I think it topped out at redline in 5th at around 118 mph. I have aftermarket exhaust, airbox elim kit, and rejetted.

Right now it's apart for a 904cc kit, so I'll have to get new #'s for ya!
 

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The best & easiest way to see top speed on almost any of the modern bikes (it was true in the 70's on my UJM's too), is to max out in the gear prior to top gear, THEN snick her into the top gear.

I'm NOT convinced that changing the sprocket makes a significant difference. My current standard black has the factory sprocket, and my prior black had an after-market sprocket. In addition, I kept the divider plate in the air box of this bike..... yet it just seems stronger at top-end.

I haven't been able to top her out yet (via 4th then onto 5th), but I've seen an easy (indicated) 115 mph in 5th and she was STILL pulling!?! 790cc, factory sprocket, divider plate in, D&D's w/Big City Thunder baffles, K&N, NH bellmouth. I'm weighing (recently) 220 pounds and was wearing lotsa (heavy) leather of late. And THIS bike with it's alloy Excels and an after-market suspension dialed in for my weight, is ROCK SOLID STEADY at speed, unlike my last standard black.
 

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Discussion Starter · #9 ·
ohiorider
I did re edit my post I did not make myself clear the first time. I have the stock 17 tooth gear The only mods are rejet and I have removed the air injectors. I would not want to get low gear any higher it is doggy enough out of the hole.
I love the bike and even have rode double on it for long rides. If i get a second triumph it will be a rocket 3. Thanks for respionding BTW it was -15 hear today
 

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Yesterday, my girlfriend and I went for a two-up ride on her bonnie, me at the helm. We hit 105mph and the bonnie was still climbing. Total rider/passenger weight approx 310 lbs (she won't tell me her wait).

G
 

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I have had my '03 T-100 to a little over 120 indicated in 4th gear...I shifted at very near the rev limit (8100) into 5th and let off as I was nearing the top of a hill...I have never tried to see how fast it will go in 5th. NARK, NH Togas, 17 tooth counter, Parabellum Scout fairing w/ 16" windshield. Guess we all ought to show up at Bonneville Salt Flats next fall and see what they will do. :-D

Larry
 

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Thruxton. Weight 187 lbs (85kg). 4th gear on the limiter 8200 RPM 112.5mph (180 kph), 5th gear, tucked in, no screen at all but lying flat on the tank, 125 mph (200kph). All indicated speeds at sea level. The bike is really quick through the gears up to 180kph. Stock Metzler fronts on stock rim. NARK, 140 mains, custom exhaust. 19 tooth front sprocket. Modified suspension & brakes.

I'm lucky and am able to do this regularly (daily if I leave early enough and the traffic is clear) due to a perfect stretch of good road and the lack of policing. At 200 kph the bike has nothing more. At this speed I'm not bouncing off the limiter but am really close. The bike is stable and I feel confident. My feeling is that this is kinda the max you can get out of these motors without extensive and expensive mods that will probably reduce reliability. Even then I doubt if you'd get much more than 215 to 220 kph, the motor just won't spin fast enough regardless of the torque you could produce. Honestly, do you really need to go any faster than 125mph? I'm stoked.
 

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hograzer, that sounds about right to me. My modded Thrux will hit 125, maybe a little better, but the top is very dependent on my tucking in really close. At that speed I am lying on the tank, with my arms hanging down so that my elbows are about at the same level as my knees.

Stock, my bike got a little wheezy at 110. I also dropped a bit of weight which makes a diff as well.
 

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I get to 110 mph at redline (7000 rpm). I dont even attempt to go near the rev limiter, I have too much love for my motor :) The engine is well put together yes, but im sure that redline on the tach is there for a reason! :)
 

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On 2007-04-03 17:05, BeastInBlack wrote:
I get to 110 mph at redline (7000 rpm). I dont even attempt to go near the rev limiter, I have too much love for my motor :) The engine is well put together yes, but im sure that redline on the tach is there for a reason! :)
Of course it's there for a reason, to keep you from having too much fun :roflmoa2: She is just starting full stride at 7500 rpm.

Greg
 

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118 once asfast as I would feel safe. 90 a good cruisespeed w/o the squirley feel. I am sure she will do more - but not w/ me on it!! :)
 

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140, but that felt fast on a Bonnie so I won't do that again unless I'm on a track. If I ever make it to Bonneville I'll gear it for 200mph :-D
 

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Gents.

Don't trust your speed clock , use a G.P.S. or have a friend run with you . my clock is off about 4 mph ( fast )
top speed i have got so far is 107mph and was not out of steam yet

all stock bike
 

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On 2007-04-03 17:05, BeastInBlack wrote:
I get to 110 mph at redline (7000 rpm). I dont even attempt to go near the rev limiter, I have too much love for my motor :) The engine is well put together yes, but im sure that redline on the tach is there for a reason! :)

Of course it's there for a reason, to keep you from having too much fun :roflmoa2: She is just starting full stride at 7500 rpm.


Its not an inline four btw :p I didnt think bonnie owners saw their machines as disposable items, I guess I was wrong!
 

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My completely stock 2003 T100 did an even 115 mph yesterday. That's right on the tach red line of 7,000.
 
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