Evan Fell Motorcycle Works

My name is Evan Fell and my hobby is motorcycle restoration, customization, and riding. This is a blog about my bikes.

1974 Suzuki TC125 Prospector

Posted on February 27, 2008 | Posted by | 28 Comments

The Suzuki TC125 is a really cool little bike. I bought this as a project to fix up but decided to sell it because I have too much going on in the garage right now.

Suzuki made this bike in a number of different sizes and gave them all interesting names like “Prospector”. I am blanking on the other models, but I believe it was a TC100, a TC125, a TC185, and a TC250.

These bikes are very cool, great little reliable 2 smokers that pump out a reasonable 13 horsepower. They are extremely easy to work on, get great gas mileage, and they are even able to cruise at highway speeds. This TC 125 has an 8 speed gearbox. It’s actually a standard 4 speed transmission with a reduction gear which can be put into use to create a High and a Low operating range. It’s designed that way to match the demands of both off-road and highway use.

Really, the only downsides to this bike are that it uses a 6 volt electrical system. The perfect bike for running errands and cruising around back roads and trails. I love it.


28 Responses to “1974 Suzuki TC125 Prospector”

  1. Road Captain
    February 27th, 2008 @ 10:44 pm

    Is there a bike you don’t like?


  2. Evan
    February 28th, 2008 @ 2:41 am

    Not really. I’m not a fan of Honda CM’s. Or any production bike that uses the motor as a frame support.


  3. Bill
    March 31st, 2008 @ 2:16 pm

    Hi -
    Do you still have the 125TC? If so, is it for sale?


  4. Anonymous
    June 17th, 2008 @ 10:19 pm

    I just bought on like this tc125 one for my 15 year girl to ride. her first bike…it is nice but still needs some work…



  5. Crisis
    August 17th, 2008 @ 2:44 pm

    Hey I have one of these bikes that I had when I was 14 (27 now) it has been sitting in the garage this whole time and I have decided to pull it out and get it going again. Do you happen to have the manual or suggestion where to get a manual for it? thanks.



  6. Ryan Griego
    March 18th, 2010 @ 10:18 pm

    i just bought one of these bikes and am looking forward to getting it running. right now i’m having trouble with the spark plug. the bike is not putting enough power to make the plug actually spark. It has a batery on the bike and i was wondering if the battery has to have a full charge to start the bike?


  7. Evan Fell
    March 19th, 2010 @ 3:14 am

    Hi Ryan – The TC125 does not require a battery to run. The battery is used as a ballast for the lights.

    If the plug isn’t sparking then you’re going to need to run some checks on your coil and magneto. Make sure your plug is new!


  8. Steve N
    May 30th, 2010 @ 5:39 pm

    I’m fixing up a TC125 and having trouble finding the 3.25-18 rear tire.


  9. Evan Fell
    May 30th, 2010 @ 6:23 pm


    You can run a 3.50 width tire without issue. A metric 80/100 or 90/100 tire should also be fine. I know Cheng Shin has at least a couple options available. I typically buy my tires at TiresUnlimited.com – but there are many other good sources in the links on the right.


  10. Roy
    September 20th, 2010 @ 9:03 pm

    Wiring diagram for a 1974 Suzuki 125TC


    tom Reply:

    If you write me, I will send you a .gif of the wiring diagram for the tc125


    the moon! Reply:

    could you send me this wireing diagram???


    Jaye Reply:


    I am interested in the wireing diagram for the TC125 too!!! Could you please send me a copy of the .gif?



    jose noway Reply:

    Here it is again-

  11. Pierre-Jean
    November 13th, 2010 @ 2:48 pm

    Hi :) i have a TC 125 :P

    But the problem, it don’t want to start… and i have the Gas tank don’t want to be close!

    I have just a low problem too with the Petrol Tap… It pours :S and i don’t know how repair it… Can you help me?



  12. Brian
    December 29th, 2010 @ 10:17 am

    Santa brought me a 1975 Prospector for Christmas. It was a great bike for my paper route and the logging trails in Alabama. I wrecked it countless times (minor) and still have the pavement nick’s on my legs and arms. A great bike! Sold it and used the cash to buy my first car.


  13. bart
    July 11th, 2011 @ 3:53 pm

    where can I get a free wiring diagram for a 74 prospector suzuki ts125.download?


    jose noway Reply:

    see the links above for the wiring diagram


    Evan Fell Reply:

    Thanks for posting these diagrams!


  14. batr
    October 22nd, 2011 @ 11:09 pm



    Evan Fell Reply:

    Jose Noway’s links work just fine.


  15. bart
    October 24th, 2011 @ 9:48 am

    what I am saying is there is no tc125 suzuki prospector diagram.can you confirm this model please?


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  18. paul
    June 26th, 2013 @ 7:08 pm

    hi i have a tc125 which appears to have a gearbox problem and will require splitting the cases do you have a schematic of the gearbox or a manual as i dont want to dive in without any information ,i have repaired a few bike gearsets but i havnt come accross a dual range before thanks aussie paul


  19. brent
    May 26th, 2014 @ 5:27 pm

    i have a 74 tc 125 wont spark everything seams to be connected properly i replaced points condensor and rectifier, when i turn on the key the only thing that works is the rear break light, nothing else i have connected the battery directly to horn and headlight and they all work but can’t get it to do so when i connect the battery properly??? and ideas


  20. January
    August 14th, 2014 @ 2:39 pm

    I can’t hear annyhitg over the sound of how awesome this article is.


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Quick Intro

I have owned nearly every make and model of vintage Japanese motorcycle as well as a number of other Europeans and more modern bikes. I do everything from simple fixes to full restorations. I also travel and ride every chance I get.


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