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  1. Z50, CT70, ZB50 and other Honda Parts
    I just recently bought a ct70 and I got it running but when I tried to get it to move under its own power, up or down the bike won't go into gear, I hear a clicking sound like it would be shifting but nothing is happening
  2. Z50, CT70 and JDM Monkeybikes
    Have a CT70 clone with a chinese 125cc motor and was wondering if installing an oil cooler on it will drop oil pressure to a potentially dangerous PSI? Will the oil pump in these motors produce enough PSI to run an oil cooler? I will be using this bike on the street for commuting and for joy riding.
  3. Z50, CT70 and JDM Monkeybikes
    People act like a 1970s Honda mini-bike should "run like a tank for the rest of your life" but let's get real, it's an antique. I just want it to start and run in a barely-acceptable manner, and at its core it's a lawnmower engine, and the recurring issue with these simple engines tends to be...
  4. Z50, CT70 and JDM Monkeybikes
    How many times have you come across this? Your new (to you) purchase has a stuck front brake cable that looks like this but when you go to replace it you realize not only that the front brake switch is integral to the cable but, that restoration examples are anywhere between $30 and $60! We’ll...
  5. Bikes and Parts Wanted - All Makes
    Hello, I am looking to see if someone has or knows where my grandfathers 1981 CT70 that he sold is. I am not entirely sure when he sold it, probably either in the 90’s or early 2000’s. The VIN number is JH2DD010XBS201861 and the motor number is 5201833. He bought it brand new and we still have...
  6. Z50, CT70 and JDM Monkeybikes
    Hello, I am looking to see if someone has or knows where my grandfathers 1981 CT70 that he sold is. I am not entirely sure when he sold it, probably either in the 90’s or early 2000’s. The VIN number is JH2DD010XBS201861 and the motor number is 5201833. He bought it brand new and we still have...
  7. Z50, CT70 and JDM Monkeybikes
    I have two 108s with V2 heads that I've built up from 91 CT70 engines. One has quite a few hours on it, the other recently assembled but ran through a single heat cycle so far. Heads have been re-torqued, o-rings where they should be, and everything performs as expected (love these 108s :cool:)...
  8. Z50, CT70 and JDM Monkeybikes
    Hey, all! I just swapped a lifan 125cc into my 1994 CT70. I'm trying to find out what each wire from the motor does, and how to match them to the harness on the bike. The schematics I've found online only tell me how to wire up the old 6v CT70s with the lifan's 12v CDI system. I have no problem...
  9. Z50, CT70 and JDM Monkeybikes
    Hi, I have a Honda 1965 S65, but just always had problems with the engine on it. I had to rebore the cylinder, but still never idled well, also found the 6v system and selenium rectifier swap confusing, second gear is out, etc. Just too much when I just want to ride the thing and have it be...
  10. Z50, CT70 and JDM Monkeybikes
    Hi all, I'm new to working on bikes, just picked up a '72 CT70HK1 a couple weeks ago. Seems to be in good condition, starts, idles, and runs well up until I'd say 80-90% throttle while riding. Once throttle is opened up past that point, the bike begins to cut out intermittently and I lose power...
  11. Z50, CT70 and JDM Monkeybikes
    I did a complete teardown and rebuild on my 74 CT70. When I put it back together It runs great. Problem is that ever since the rebuild there is no 3rd gear. It shifts smooth from neutral into 1st and 2nd. When I shift into 3rd it goes into a false neutral with no grinding or funny noises. It...
  12. Z50, CT70 and JDM Monkeybikes
    I recently bought the fork kit with disc brake from ebay. It didn't come with any instructions, but I was able to get most of it done (I think). My questions are if it's done right. Appreciate any help in advance. First one is on the speedo gear. First I noticed it rubs on the hub quite a bit...
  13. Complete Bikes For Sale - All makes and models
    1993 last year of the ct70's. it's in great running shape. no title but you can apply thru mail to Vermont RMV. All unmolested and original. Brand new front brakes and speedo cable. Speedo and headlight work. Has strong compression, so strong I can start it by pushing the kickstarter with my...
  14. Z50, CT70 and JDM Monkeybikes
    This one has me stumped. I bought a bike in a box which needed a new top end. Put that on with a stock Keihin carb, and it runs decent, but the sucker will not hold idle. I'm holding the throttle about a quarter turn open. LET ME CLARIFY: The bike itself will idle, as long as I hold the...
  15. Z50, CT70 and JDM Monkeybikes
    My little 1970 Red Honda 70 that I custom restored was stolen for the 2nd time on December 13th, 2015 from the Brentwood area of Los Angeles and I'm still hoping it will turn up. If anyone happens to see it listed for sale online, or recognizes it from somewhere, PLEASE let me know. REWARD!!!!
  16. Z50, CT70 and JDM Monkeybikes
    I picked up 4 ct70s frames with quite a bit of parts. Fast forward putting 1 together and the front wheel is not centered, brake side is 1 inch and the other is 5/8 from the forks. I measured and both halfs are exactly the same width, 1 5/8". Is one half supposed to be wider than the other half?
  17. Z50, CT70 and JDM Monkeybikes
    i was wondering if it was possible to run a ct 70 without the ignition switch and if so how? thank you
  18. Z50, CT70 and JDM Monkeybikes
    Hey guys/gals, Looking for some advice regarding a really tough gear shift issues with my 93' CT70. Changing gears from Neutral to 1st gear is no problem. I have to put extra effort in moving from 1st to 2nd gear and 2nd to 3rd gear. Is this something any of you have experienced? Do you think...
  19. Z50, CT70 and JDM Monkeybikes
    Greetings All! Looking for help on this one: I installed an aftermarket CDI kit in my HK1. The Mitsubishi stator parts are getting harder to find, so I decided to make the change to a CDI ignition (one that can be bought on eBay). The bike will run fine with the kit installed, but I'm...
  20. Z50, CT70 and JDM Monkeybikes
    Picked up a project Honda Z50a monkey bike where the PO cut into the neck of the frame to fit the OEM stock CT70 carb and intake to the 72cc upgraded top end(Z50 bottom end). Creative...Yikes. After the frame gets repaired, I will need to refit the carb to the engine & have read a few options...
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