Doctor Funk, or, the strangest CT90 you've ever seen

adventurco

Nick Ol' Eye
DTT BOTM WINNER
Well, I picked this thing up tonight. Buying a CT90 was most certainly not on my list of things to do today, but alas...

Looks to me like it may have been raced at one point. Someone added all sorts of bits like an oil cooler, pit bike fender, and what looks like a Honda SS50 or S90 tank that is actually pretty clean inside. Most of the stuff is half assed (the tank is mounted with angle iron) but it looks kind of cool as is....well maybe not the headlight.

It has spark, compression is at 120. Carb is soaking tonight and I need to pick up a new can of carb cleaner but my guess is this thing will fire right up. This thing may end up being the little sister to the Van Van for trail running.

Here are some pics of the little monster.

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adventurco

Nick Ol' Eye
DTT BOTM WINNER
hillsy said:
I'd imagine you'd get a pretty decent range on that thing with two tanks.

The tank under the seat has been disconnected, and the way the seat is currently installed it's impossible to fill.

Could be cool to rig up both tanks though.
 

adventurco

Nick Ol' Eye
DTT BOTM WINNER
irk miller said:
Does it run yet?

Nope. Carb is cleaned but I have to put it back together, heading northeast for the weekend so we had to run out the door.

Ordered a tube for the back. See if this thing will pop a wheelie.


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adventurco

Nick Ol' Eye
DTT BOTM WINNER
What's the consensus on this?

Not sure if the dipstick is from a different model, but it has a piece of rubber hose slipped over it with a notch. The oil level is just below the notch, so I assume that's where they were running it. Only thing I can think of for changing the amount of oil in the crankcase would be to slightly increase it for the added volume of the oil cooler. The notch is about 3/4" lower than the end of the dipstick.

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adventurco

Nick Ol' Eye
DTT BOTM WINNER
Doctor Funk, or, the strangest CT90 you've ever seen

According to the parts fiche for the CT90 K1 (according to frame serial number this is a '69 model), the RH cover and dipstick should look like this:
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Here's what I have

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It looks like the whole assembly that the dipstick threads into was stuck into the RH case cover now that I'm really looking at it.
 

adventurco

Nick Ol' Eye
DTT BOTM WINNER
irk miller said:
That's a CL or SL90 side cover.

Interesting. The CT90 had the semi-auto clutch IIRC, maybe this machine has been modified to run a traditional setup.
 

adventurco

Nick Ol' Eye
DTT BOTM WINNER
This machine has a clutch lever. Would the semi-auto or automatic clutch have a clutch lever? I believe it was a centrifugal setup. I am not familiar with the semi-auto at all.
I think the shift lever in the case of the semi-auto is on double duty as a clutch lifter, so the beginning part of the throw is akin to pulling the clutch lever... Correct me if I'm wrong.

Here is a pic of a stock CT90K1. I am thinking this has been modified. Guess the only way to know for sure is to test ride it

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