Will The Bonnie Work For Me?

[doxiedog]

The Bonneville, T100 & Thruxton all have 360° engines!
Only the scrambler has a 270°,none are 180°.

[sebastianp]

I testrode a Bonneville on the weekend and found it to be a remarkably pleasant machine. More than enough power for every day living, but I found it a bit too gentle for me. Comfortable and worked really well.

I recorded my testride here:
http://www.youtube.com/watch?v=67-eQkTV8m0

[Tripped1]

Originally Posted by Beaverboy

The Bonneville, T100 & Thruxton all have the same 865cc, 180* crank engine. The Speedmaster, America and Scrambler all have 270* cranks.

As for your "hitting" the crank at as close to 90* comment.. well, you seem confused about what '270* crank' means... or I'm completely missing your intended meaning.

I know what it means I was simply wrong, its how far the crank moves between ignition strokes.

[LWRider]

Originally Posted by doxiedog

The Bonneville, T100 & Thruxton all have 360° engines!
Only the scrambler has a 270°,none are 180°.

Did they change this over the years? I am looking in my "Owner's Handbook" at the specification pages for my 2011 Bonnie T100 and it says the Bonneville, Bonneville SE, and the Thuxton all have 360 degree firing angles; while the Bonneville T100 and Bonneville Scrambler have 270 degree firing angles.

Cheers,

Mike

[No False Enthusiasm]

From Triumph Website: http://www.triumphmotorcycles.com/mo...ille-t100/2995

T-100:

SPECIFICATIONS
Engine and Transmission
Type Air-cooled, DOHC, parallel-twin, 360º firing interval
Capacity 865cc
Bore/Stroke 90 x 68mm
Fuel System Multipoint sequential electronic fuel injection with SAI
Exhaust Stainless steel headers, twin chromed exhaust
Final Drive X ring chain
Clutch Wet, multi-plate
Gearbox 5-speed
Oil Capacity 4.5 liters (1.2 US gals)

NFE

[LWRider]

That's a pretty big flub up in the Owner's Handbook.

[Bikebits]

Originally Posted by LWRider

I am looking in my "Owner's Handbook" at the specification pages for my 2011 Bonnie T100 and it says the Bonneville, Bonneville SE, and the Thuxton all have 360 degree firing angles; while the Bonneville T100 and Bonneville Scrambler have 270 degree firing angles.

That is a massive, inexcusable mistake.

The T100, Bonnevilles and Thruxton have the 360 degree engine; the Scrambler, America and Speedmaster have the 270 degree crank.

[sargev55]

Originally Posted by Bikebits

That is a massive, inexcusable mistake.

The T100, Bonnevilles and Thruxton have the 360 degree engine; the Scrambler, America and Speedmaster have the 270 degree crank.

go easy, its a british manual

at least the electrics work

[teachnsurf]

I got nothing to say. I just saw an opportunity to post a pic of my ride.


'09 Bonnie Black EFI

[DWR302]

Teach, I like the well worn Bonnie. I have started reading your 09 trip report. Very interesting. Do I recall you commenting on a trip I took last year and posted in the Triumph forum? Anyway, cheers! Heading out on a little trip to the Ozark Rat Raid myself in the morning.

[Tecpatl4]

It works for me too. Last year did a 4500 mile trip in 10 days. Only problem I had was almost getting stuck in deep sand in New Mexico.

And it had no problem keeping up with traffic on the interstate. Although with the light weight it gets a bit dicey passing those big RV's with the flat noses at 100mph.

[KungPaoDog]

So now that we figured out which model has which crank, what is the difference between the two engines? Is there a difference in traction on the dirt for the Scrambler? Is it just about sound? Does one vibrate more than the other? Are the torque curves super different? Why did the bother?

[fyr]

Well
Im on to my second.. 07 T100
Was on the fence on what to or not to buy. My mind always came back to the Bonnie.
It'll be a do it all bike for now.. pics when I have em

[acap650]

Originally Posted by KungPaoDog

So now that we figured out which model has which crank, what is the difference between the two engines? Is there a difference in traction on the dirt for the Scrambler? Is it just about sound? Does one vibrate more than the other? Are the torque curves super different? Why did the bother?

Since singles are the best for traction, a twin with two closely spaced power pulses hooks up better than one with evenly spaced pulses. Examples are flat track and gp bikes with "big bang" timing.

In the Scrambler the 270 deg crank feels and sounds more like a 90 deg v-twin. I doubt there is much real world advantage, I think it is just marketing.

[slingstone]

According to the Speedmakers episode on Triumph and their then-new Thunderbird (1600 cc, but also 270 dregree crank), the 270 engine was to give more chuckle sounds to the engine. They're trying to approximate the acousitcs of a v-twin (with an ear on Milwaukee).

http://www.hulu.com/watch/238956/spe...ph-motorcycles