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 Truxton engine in an America or Speedmaster engine
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Joined: Sep 2013
Posts: 112 Likes: 2
Adjunct
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OP
Adjunct
Joined: Sep 2013
Posts: 112 Likes: 2 |
Hello Everyone - has anybody put a Thruxton engine in a America or Speedmaster? Thanks
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Re: Truxton engine in an America or Speedmaster engine
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Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
865 Thrux & 790/865 Bonnies have 360 cranks, all BA/SM/Scrams have 270 cranks...
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Re: Truxton engine in an America or Speedmaster engine
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Joined: Feb 2007
Posts: 23,246 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,246 Likes: 64 |
I like the sound of the 360º crank better.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Truxton engine in an America or Speedmaster engine
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Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Quote:
I like the sound of the 360º crank better.
Something else we disagree on 
My unstated point was that the OP would have to either change the engine management or the cranks in order to swap a 360 for a 270. Might be more trouble than that is worth. Or not... 
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Re: Truxton engine in an America or Speedmaster engine
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
Joined: May 2010
Posts: 5,720 |
Quote:
Quote:
I like the sound of the 360º crank better.
Something else we disagree on
My unstated point was that the OP would have to either change the engine management or the cranks in order to swap a 360 for a 270. Might be more trouble than that is worth. Or not...
Crank and Cams and probably the flywheel.
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Re: Truxton engine in an America or Speedmaster engine
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Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Thanks Ryk, I overlooked those.
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Re: Truxton engine in an America or Speedmaster engine
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Joined: Sep 2007
Posts: 198 Likes: 1
Adjunct
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Adjunct
Joined: Sep 2007
Posts: 198 Likes: 1 |
If it was a complete engine, then only the ECM/Igniter and coils would need to be changed and possibly the wiring harness depending on the knowledge of the mechanic. The upside, more top end power.  The downside, less mid range torque. Not good for a cruiser. 
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Re: Truxton engine in an America or Speedmaster engine
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Joined: Feb 2007
Posts: 23,246 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,246 Likes: 64 |
Coils too? I don't see why.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Truxton engine in an America or Speedmaster engine
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
Bonnie engine uses a single input dual output coil. Although, you could probably wire the dual coils on a 270° engine to do the same. That does bring up the point that it likely requires some small changes to the wiring harness too. But still doable.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: Truxton engine in an America or Speedmaster engine
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Joined: Feb 2007
Posts: 23,246 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,246 Likes: 64 |
I didn't know they used the wasted spark method on the 360º engine.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Truxton engine in an America or Speedmaster engine
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Joined: May 2007
Posts: 5,068 Likes: 1
Saddle Sore
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Saddle Sore
Joined: May 2007
Posts: 5,068 Likes: 1 |
Quote:
I didn't know they used the wasted spark method on the 360º engine.
A spark is a terrible thing to waste.
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