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  1. Z50, CT70 and JDM Monkeybikes
    I am having trouble installing new cylinder studs. Looking at parts diagram I have the 196mm on the clutch side and the 188mm on the flywheel side. When I screw them in, the don’t line up. What am I doing wrong her. There isn’t much guidance I am finding on how to do this properly so I once...
    z50
  2. Z50, CT70 and JDM Monkeybikes
    I've looked into it a little bit and can't really find anything on a maximum bore on a Z50. My dad and I really just want to make an absurdly overpowered Z50 to mess with some of our friends.
  3. Z50, CT70 and JDM Monkeybikes
    So I just fitted a 88cc kit on my honda z50 and i forgot to tighten the cam chain roller bolt, so after a short ride i noticed the bolt was not in the hole at all anymore, so now ive put the bolt back in but im not sure if the roller is still there. I dont hear anything weird but it looked like...
  4. Z50, CT70 and JDM Monkeybikes
    Almost done with this z50 but cant figure out the battery mount. Also does anyone know of a 12v lithium battery that fits in the stock location?
  5. Z50, CT70 and JDM Monkeybikes
    I'm currently rebuilding a 1978 Honda z50 Engine, and i've gotten the cases all put together but when i started doing the studs i forgot to fully clean out the thread holes and so the studs on the flywheel side don't go in enough to put the dowel pins in. I tried to remove them again using the...
  6. Z50, CT70 and JDM Monkeybikes
    Hello Everyone, Okay, here is the story. I restored my 1978 Z50 from my childhood. I sent the motor off to a professional and unfortunately he put in big bore 72cc kit. I got the engine back, put it in the bike and it did not run well. The carb was rebuilt and it has the stock main jet...
  7. Z50, CT70 and JDM Monkeybikes
    I’ve gotten myself a 1982 Honda Z50R but I can’t seem to find any hubs for it, all the hubs I find are 4 bolt and the Z50R rims are 3 bolt. I was wondering if I could put a set of Z50 rims on my Z50R so that I can use the Z50 hubs and the full front assembly. Just wanting to make sure that the...
  8. Z50, CT70 and JDM Monkeybikes
    Howdy. Hopefully I've come to the right place with all these questions of mine. I am currently building a 1995 Z50R with a KLX110 fork upgrade, +3" swingarm extension, and (possibly) a 140cc Piranha engine. At this point, I am starting to think about brakes. With a 140cc engine, I feel like...
  9. Z50, CT70 and JDM Monkeybikes
    I have an 82 Z50 that ran great but was starting to smoke so I put a new piston and ring set in and honed the cylinder. Set valves to 0.02 intake and 0.03 exhaust. However now I’m only getting 60psi compression. Bike idles just fine and runs great in neautral. But under load it can hardly make...
  10. Z50, CT70 and JDM Monkeybikes
    I just reacquired my 1987 Z50R from my brother's friend who has had it the last 20 years at a vacation home. This was done without my knowledge or approval but long story short, it was in great condition when I last saw it last and now it isn't. I got it new for xmas in '87 and it has great...
  11. Z50, CT70 and JDM Monkeybikes
    Hey everyone, new forum member and first post on here. Thought I'd share my Z50 restoration project Ive been working on during the winter. First time working on a z50 or really any bike for that matter. Aside for a 70's vespa moped lol. I picked up the honda from a customer for the great price...
  12. Honda CRF70
    https://www.planetminis.com/threads/new-tb-hd-auto-clutch-now-problems.252662/ If your clutch drags or is engaging right at idle, read this.
  13. Bikes and Parts Wanted - All Makes
    Hey folks I am restoring a 1969 Z50 K1 to it's former glory. I need a battery box...Yes I have seen the ones on eBay from Vietnam but $110 shipped is steep and it will take 30 days to arrive. Anyone out there in the community that might have one of these laying around that they'd be willing to...
  14. Z50, CT70 and JDM Monkeybikes
    I have a 1973 Honda Z50 with an engine that is a mix of 1985 ATC70 and 1973 Z50 parts (the cases, top end, and transmission are ATC; the ignition, crank, kickstarter, and shift shaft are Z50; the clutch is a mixed bag). I want to install an ignition cover from an XR50, but I can't shift with the...
  15. Z50, CT70 and JDM Monkeybikes
    I am experiencing Neutral & 1st gear working, but the bike isn't shifting into any lower gear (no 2nd or 3rd). I think the drum stopper may be in the incorrect position, due to the shift arm being in the wrong position. I have read on thumppertalk that the flat side should be vertical and...
  16. Z50, CT70, ZB50 and other Honda Parts
    Greeting's everyone, I am new to the site here. I'll keep this short and sweet. Just picked up a 1988 honda z50 for me and my nephew (age 2.5) to have some fun on. The engine in missing the magneto cover, and it's seem's almost impossible to find. The clutch cover has a big slab of silicone...
  17. Z50, CT70 and JDM Monkeybikes
    Hello I'm having some issues with my 1986 Honda Z50R. I have discovered that there is a fuel filter/screen located inside of the gas tank. I'd like to change this filter as I believe it may be clogged. How is this filter removed? I have taken the petcock out but I cannot figure out how to remove...
  18. 1973-1985 ATC70 and TRX70
    Been getting worked by this lil eBay purchase carb in the tuning game so far. This OEM Honda ATC70 carb of mine has a periscope-like body hole pointed out in photo. It looks like it should be all good & to help prevent air lock or something. I have no clue & was looking for wisdom on what...
  19. Bikes and Parts Wanted - All Makes
    Hi, I'm looking for a z50jz frame 1979-1989 model. If you got one, please contact me. Thanks
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