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3TB engine swap to 4PT 3TB engine swap to 4PT
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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Sean Howman, The Pamir highway in an unseasonably cold late October, Tajikistan

I haven't been everywhere...
but it's on my list!


Photo by Sean Howman,
The Pamir highway in an unseasonably
cold late October, Tajikistan



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  #1  
Old 27 Dec 2016
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3TB engine swap to 4PT
Wondering if the electrical is plug and play, its not same number on the TCI box?
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Old 27 Dec 2016
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https://www.xt600.de/xt_werkstatt/_b...tor_in_1vj.htm
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Old 27 Dec 2016
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Thanks, nice pictures but the rest is a long story to translate..Anyone here who is good in german and can give a heads up what they talking about?
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Old 27 Dec 2016
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I can't read German.

As far as I know, it bolts in without too much work.

Plug straight in, I doubt it.

It's a complete new model so I would guess that the loom is different too.

I would think that you wan't the ignition system for the new motor to come with it. You want the ignition pickup and CDI to be paired etc.

Are they both TCI ??
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Old 28 Dec 2016
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Anyone have electrical diagram for the 4pt so i can compare with 3tb?

http://transmic.net/index.php/2016/07/02/faq/
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Old 28 Dec 2016
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Quote:
Originally Posted by *Touring Ted* View Post
Are they both TCI ??
Yep, i thought only difference was the clutch actuator being on the right with the 4PT

Mezo.
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Old 28 Dec 2016
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It should work then. Assuming it uses the same pickup and ignition/Advance timing.

A few plugs might be different but hardly a reason to give up.

Id want to use the TCI from the 4PT model to be safe though.
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Old 28 Dec 2016
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Thanks, nice pictures but the rest is a long story to translate..Anyone here who is good in german and can give a heads up what they talking about?
It translates automatically in Chrome browser. Try sticking it through translate.google.com
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Old 28 Dec 2016
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Yes in english it gives a little understanding, the engine is a 4pt not 3tb. And the conversion is from 1jv to 4pt so its no help, i need to know whats different on the electrical on 3tb-4pt.
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Old 28 Dec 2016
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I was wondering why the 4pt had som much better brakes, and i see now that the brake disc is about 2cm larger. So there is no direct swap on the caliper in front, is it different mounting on the caliper or the strut mounting?
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Old 29 Dec 2016
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XTrock this is the circuit diagram I use for my 4pt. Hope it helps. http://www.horizonsunlimited.com/hub...1&d=1483010545
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File Type: pdf xt600e_wiring_diagram (1).pdf (183.7 KB, 6250 views)
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Old 29 Dec 2016
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Originally Posted by xtrock View Post
Yes in english it gives a little understanding, the engine is a 4pt not 3tb. And the conversion is from 1jv to 4pt so its no help, i need to know whats different on the electrical on 3tb-4pt.

Personally I'd use the 4PT loom. It will be the simplest solution when it comes to your TCI, ignition timing, charging circuits and safety circuits.

You might have to chop, extend, alter here and there but no more than you'll have to do with getting the 4PT motor to work correctly with your original loom.

How are you with Electrics anyway ??
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Old 29 Dec 2016
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Thanks connal, i dont have the loom for the 4pt engine.
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Old 29 Dec 2016
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Shouldn't be hard to find one. Its the last thing people want when breaking bikes.

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Old 29 Dec 2016
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Yes but it seems like there is not much parts for these, most for 3tb. Its no hurry, if i have some failure on the original i was hoping for a easy swap to the 4pt. Think its strange its not a direct swap if the only difference is clutch arm and the 5 gear, they maybe did some changes around on the circuit but all in all from the engine there is not much to change.
Last edited by xtrock; 29 Dec 2016 at 19:27.
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