1968 Honda CT90

35346 Views 49 Replies 23 Participants Last post by Unkle Krusty, 5 mo ago

jacobj11

Discussion Starter · Apr 14, 2014

I bought myself a new project to get running and ride around in while I slowly rebuild the Benly. I got her off of craigslist on Friday for $240, not too bad for a CT90, I think. The engine was frozen, it took me an entirety of two and a half hours on Saturday to free the, what looked like a brand new, piston which was rusted in place in a pristine cylinder bore. Just had to hone it out and clean up the piston and it fit like brand new. Cleaned up the combustion chamber, freed the valves, and reassembled the top end to find that it has flawless compression and turns over nicely. Now I'm waiting for the PZ-19 Carb and the battery I ordered to see if I can get a pop out of her.

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jacobj11

Discussion Starter · #41 · Mar 10, 2015

So I moved on to figuring out the headlight issues. The headlight switch gets power, but it doesn't get past there. There's a jumble of disconnected wires in the headlight bucket, so maybe the previous owner decided to work on the wiring, left it for a while, and reccnnected the wires in the wrong place. I find that if I put my thumb over both contacts inside of the switch, it completes the circuit. Damn, I hate wiring.

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yahmyxs

· #42 · May 2, 2015

there was a big difference between the 68 and the 76 model.

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jacobj11

Discussion Starter · #43 · Jul 13, 2015

I know, I need to quit putting off the headlight circuitry, but there are plenty of other problems to distract me.

Like the front shocks, for instance. They've been bottoming out with ease. I've searched, but haven't found anything on replacement or rebuilt CT90 K0 leading link shocks, and I haven't found anything on rebuilding the shocks. From what I've read, you can't even rebuild them yourself.

There are, however, C70 shocks readily available. I figured that anything would be better than the ones I have now, so I decided to order a pair. I was right. They fit pretty good, other than the bracket for the arm being a washers width too wide. I guess you know how I fixed that. I removed the old shocks to see that they telescoped about an inch farther than the springs, and had no return at all. The new ones, however, fit snug in every aspect, and were the same length as the old ones. The ride is much better now, I haven't bottomed out on dirt roads or potholes. Now maybe I should get to the headlight since I'm currently on a tight budget.

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Russ moelker

· #44 · Jan 10, 2016

160 benly I think

I have a 1965[ 160 baby dream I think rev
Fered to as a baby benly. It's complete in white it runs ,I have stored it 25 years . Now I got it out .when opened the stator cover I have oil in there .is this as I suspect s seal leak behind stator ? Can I pull stst and get to seal or must split motor to repair. I have a Clymer book but it's to basic . Don't want to mess up this bike is mint .all parts intact

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Rizingson

· #45 · Jan 10, 2016

Oil in that area is normal. Since the points are not in that cavity, the alternator works just fine in a bit of oil. Just make sure you don't overfill the crankcase. Oil level is checked with bike level and dipstick just resting on the threads.

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Hondact

· #46 · Nov 15, 2016

Nice project!!!!

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User-1

· #47 · Feb 5, 2017

Nice bike! I have a '67 CT90 I'm sadly getting rid of now on ebay. I didn't see anything about you mentioning the drive. What is it a 4sp with a high/low? I'm trying to remember if mine was a 4 or 5sp. I never even used the high and low. The bike was able to get up to 50mph pushing me, about 200lbs. That's not bad! I was so glad this wasn't an automatic!

These bikes were actually quite fun to ride! Especially around town.

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MikeCT90NW

· #48 · Mar 3, 2018

I have a number of CT90's, so while this is your first you'll find that the more you pick up the better the experience gets!

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twood

· #49 · 5 mo ago

Rizingson said:
Oil in that area is normal. Since the points are not in that cavity, the alternator works just fine in a bit of oil. Just make sure you don't overfill the crankcase. Oil level is checked with bike level and dipstick just resting on the threads.

I have a 68 ct90 and am looking for help finding a replacement carb as mine leaks like a sieve. Can anybody give me some info. on a replacement that would fit without having to do mods? Thank you in advance