Thread: Turning it back into a ct70 KOH?

The previous owners of my 3 ct70's botched a job on an H. They turned it into a 3-speed automatic. I want to turn it back into the 4-speed manual.

HOW DO I DO THIS? How do you go about turning a 3 speed auto back into the 4-speed manual?

By replacing the bottom end with a 4 speed transmission or pick up an entire new 4 speed engine.

If you want to rebuild make sure you have the correct bottom end. The letters are CT70HE and # starts w/ a 1 for the KO. They're found behind the shift shaft down low. If at all possible I would go with all the correct markings. You may need to be patient to get the whole thing in good condition. Someone in this community may be willing to give one up. To some of these guys giving up thier first born would be easier . On ebay they're a bit pricy and risky. Doing an all out rebuild could run about $500 assembling it yourself. Just a guess.

Is that a hint? needless to say, I'm a honda enthusiast (thanks to my father) but i just bought a house and got married. My finances are bit slim, or nill to be more precise.

I cannot believe the previous owners were soooo bent on automatics that they would disable this H. I need to do some more research and take this baby apart to see exactly what is missing, extracted, or replaced.

Is it possible that the previous owner left a manual gear box or transmission, please i am very novice with such an endeavor but know just enough to get myself in trouble, but adjusted it just enough to be able to not have an automatic clutch but still drive it as an automatic with 3 gears?

It still jams into gear when i upshift or downshift. No room for the disengage between shifts.

I really don't think anybody "turned" a 4-speed manual into a 3-speed automatic. The only practical way to do this is to replace the entire bottom end of the bike, in which case you wouldn't be able to tell if they did or didn't (saving the side badge on the frame saying CT 70H).

What you're thinking is that somebody modified an H-model transmission and made it an automtic 3-speed, and I think you can pretty much rule that out. There are parts of the 4-speed manual clutch that aren't even in a 3-speed! And if you did manage to make the manual a semi-automatic, why would you not keep it a 4-speed?

Anyway, the bottom line is the bottom end is what it is and it aint what it aint. If it's a 3-speed, then that's all it'll ever be, and the same if it's a 4-speed manual.

I can submit to my ignorance. I now understand that a 3-speed is a 3 speed no matter what, same with a 4. But, why does it shift so abruptly with no release with what it feels like a clutch should do?

Another thing, my green KOH (now questionable) has somehow turned into a KO and it would not be beneficial or financially feasable to turn into back into a KOH?

You may try to adjust your idle screw down on the carb. That may be the reason its shifting abruptly into gear. Otherwise you can always play with the adjusting screw on the cover . The side of the engine that your kickstarter is on. You should only adjust this when the engine is not running. If your engine seems to be idling high I would start with the idle screw first before messing with that clutch adjustment bolt. But remember on these automatic transmissions there is not a slow release until it grabs like a manual clutch.

Talking in text is nothing like talking person to person. To narrow this dilemma down one more step, the engine runs smooth and has a very low idle. Cold, the idle actually slows so much it shuts off. Warm, she purrrrrs like a kitten just turning over fast enough not to stall.

More explanation, you know when you shift on the KO's and when you depress the shift lever down and hold it, the bike seems to not be in gear and you can coast as if the bike was in neutral? The green KOH does not do that. When you press it down it just goes into gear. In other words up or down shift = gear. THere is no middle neutral space. That is what i mean by it slams into gear. It shifts as if i forgot to pull in the clutch on my XR500. That is what I want to fix.

Can that be adjusted in the clutch bolt? I have never had to mess with one of those before.

Yes you can adjust that with that bolt. Loosen the outer nut and turn the bolt in a little bit at a time and see if it makes any difference.Remember where the adjustment was. In other words just turn it maybe a 1/4 turn and see if it helps. Turn in another 1/4 turn and try again. If no difference is felt turn it back to the original setting. I believe the more you turn it out the tighter the shifting mechanism will become. Turning it in will loosen the mechanism. But I repeat just try a little at a time. Also only do this when the engine is not running. Its a start up and try it type of deal.

I had the time during the holiday to try your suggestion. When i adjusted the screw the shift is much lighter now but there is still no space in between shifts. It still slaps into gear without it ever disengaging when you up or down shift. Again, all of my other bikes when you press down or lift up and hold, it is not in gear. This bike just goes right into gear.

How much do 4-speed KOH lower ends typically run? I really would like to slap the original 4-speed manual back on to this thing.