Thread: CF70 Chaly project

That frame looks similar to the plastic one off of the CT90. Is it a steel tube frame with plastic covers, or is all that yellow metal?

The yellow is all metal.

I would imagine that bike is a bit heavier than the CT, then. The fenders look a bit bigger as well. I see a bit of the old C-105 design in it a bit, too.

So i haven't gotten much of anything done on the Chaly yet. Still in parts collecting mode. Some of the motors sitting on the bench and the bike itself is still sitting under the stair case. However I did find and order the exhaust system for it. Totally stoked to hear Over came out with their GP system for the DAX and Chaly. My friend Dave got his in for his monkey the other week and i was pretty impressed.



For more info on what OVERs offering for the CT/DAX/Chaly check the link Welcome to Honda50.com » Blog Archive » OVER Racing CT70/Chaly offerings





Oh and here is the start of the motor for the chaly.

Brad,

That motor looks wicked,nice work. What beast of a carb is that? The anodized bits look very sharp.

Brad... Nice exhaust and motor. Is that a built up ZB motor?
tmas

Originally Posted by tmas

Brad... Nice exhaust and motor. Is that a built up ZB motor?
tmas

currently whats seen in that picture is a ZB bottom end, with a left over Takegawa 88 kit and a older ported TB race head. I picked up a junker ZB motor off ebay for next to nothing. Seems like another one that was left for dead then spray painted. I plan to nurse it back and build it up nice. Just through the stuff on so i could check some clearances with the FCR28 carb and the chaly frame. Im still undecided on what the final build of the motor will be but for sure i will use the cases and the carb. one thought is to build it up with a TB117 kit and 4 speed. I need to resist doing another high $$ build with this one. I want to have just enough of a motor though that I really put that carb to use. Ill have to make a custom intake for it as i want the carb to stick up through the center of the frame, which should be fun to do and look pretty wicked in the end.

Originally Posted by gstegman

Brad,

That motor looks wicked,nice work. What beast of a carb is that? The anodized bits look very sharp.

FCR28 down draft carb. The red on the carb is Powdercoat, and in honesty the PC is of pretty poor quality. Not sure if the previous owner did the PC himself or sent it out but there are some high spots that are discolored slightly. Ill leave it as it is though as im not that anal about it.

So I got it running, converted the bars to fold downs, cut off the original headlight ears and put some CT ones on, changed the seat, started reworking the wiring and re-added some blinkers. Also just added a different exhaust. Also re keyed the bike.

It needs some body work real bad, but first thing is to get all the electrical working so i can get it though inspection and get the plate for it. It has temporary reg for the time being.

I'd see the biggest accomplishment with the bike is i pulled it out of hiding finally. Its been under the staircase for a while now hiding from the wife.

Hey Brad

Can you tell me about the FCR? ( I am famliar with them on mt CRF450R)

I run a CT70 KO and will be swapping to a Nice 110cc soon.

Does the FCR suit daily driving?

Also that exhaust looks unreal!!!!

How does it sound?

Does the combo of say FCR carb with HOnda 110cc nice engine and over racing exhaust make for a good daily driver or would it be too tempramental?

Brad can tell you more about running a large carb on a small engine, particularly the FCR.

However, I can tell you that 22mm is the limit for a stock 110 Nice...that's the diameter of the intake port. Honda fitted them with 18mm Keihin carbs and the bike (Honda Nice, which is an updated version of the Cub 90/CT110) is capable of mid 60s, bone stock. I would guess that it takes a bit more power to get the same top speed from a CT70.

Running a carb with a venturi size that's larger than the intake port is counterproductive. The best you could hope for would be compensating for inadeqaute flow velocity through the venturi and the bike won't be any faster.The drawbacks of loading-up at idle, part-throttle stumbles caused by lean spots and nightmarish tuning can easily outweigh the advantage of an oversize carb. Generally speaking, the carburetor isn't a significant flow obstruction and doesn't reduce power unless it's grossly undersized. For a race bike, the situation is somehwhat different. On the street, you want driveability.

The CF70 Chaly design just begs for a ginormous induction setup standing proud through the frame. It's the perfect small Honda for an FCR28 with a V-stack Still needs an engine fed through a 28mm intake port.