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Discussion Starter · #1 ·
friend is building me a bike, looking for some feedback on which motor to go with.
4 speed swingarm frame
4 speed baker trans
tech cycle primary and starter
I planned all along to go with 80 HD evo, as reliability is most imp't here. however, we can get a new S&S twin cam rebuilt by a reliable, trusted friend for same 3k as evo. they were saying twin cam is better motor, especially if we're going with a 4 speed. (he knows frame will be modified to fit either one)
comments?
 

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The Evo will bolt right in, if the frame has been clearanced at upper seat post ( if aftermarket frame, most likely done already). If the Twin Cam has the 4 bolt mounting flange it will require an adapter to Bolt in. Unless the T-C has gear drive cams, I'd go with the Evo. There are tons of parts available for not much $$ for both engines. The T-C will vibrate in a solid mount frame, more than an Evo, unless it has been balanced much better than standard factory issue.
 

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Discussion Starter · #4 ·
The Evo will bolt right in, if the frame has been clearanced at upper seat post ( if aftermarket frame, most likely done already). If the Twin Cam has the 4 bolt mounting flange it will require an adapter to Bolt in. Unless the T-C has gear drive cams, I'd go with the Evo. There are tons of parts available for not much $$ for both engines. The T-C will vibrate in a solid mount frame, more than an Evo, unless it has been balanced much better than standard factory issue.
our builder friend recently built a similar bike for himself (4 speed s/a frame, baker 4 speed, etc) with a twin cam, so I'm confident we'll get either motor to fit with a some modification to frame. twin cam will have gear driven S&S cams. as I mentioned, they said twincam is better especially with a 4 speed, anyone know why that would be?
 

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our builder friend recently built a similar bike for himself (4 speed s/a frame, baker 4 speed, etc) with a twin cam, so I'm confident we'll get either motor to fit with a some modification to frame. twin cam will have gear driven S&S cams. as I mentioned, they said twincam is better especially with a 4 speed, anyone know why that would be?
I think it works best with a 4 speed, because he has one for sale! The igniton set up for an Evo is SIMPLE, you can run points even. Not So with a T-C, you'll have to go with an expensive Stand Alone ignition, or buy the Nice but expensive Vulcan Engineering set-up. I'm going thru this right now with a T-C trike I'm putting together. Its been an Expensive learning experience. And I am a fan of the T-C, its a well built stout engine, but bang for the Buck an Evo kicks its ass! The stock T-C is a 4 inch stroke, where as the Evo is a 4-1/4" stroke, which equates to more bottom end torque also. Plus looks wise I think most will agree the Evo is a better looking engine. I mean its not a SHOVEL ( my fav, ), but hey you asked.
 

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Discussion Starter · #10 ·
I think it works best with a 4 speed, because he has one for sale! The igniton set up for an Evo is SIMPLE, you can run points even. Not So with a T-C, you'll have to go with an expensive Stand Alone ignition, or buy the Nice but expensive Vulcan Engineering set-up. I'm going thru this right now with a T-C trike I'm putting together. Its been an Expensive learning experience. And I am a fan of the T-C, its a well built stout engine, but bang for the Buck an Evo kicks its ass! The stock T-C is a 4 inch stroke, where as the Evo is a 4-1/4" stroke, which equates to more bottom end torque also. Plus looks wise I think most will agree the Evo is a better looking engine. I mean its not a SHOVEL ( my fav, ), but hey you asked.
I hear u on the ignition. they suggested I go with a magneto if I go the TC route, but not sure I can afford that.
by the way, he's not trying to sell me on anything. he said as a favor he'd build me a similar engine to what he has for same price as evo , whereas he would normally charge b/w 4-5k. I trust the guy, otherwise I would not even have asked about the TC, but looks like most you guys suggest the evo anyway.
thx for the help and keep it coming...
 
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