[karasman]

Hi Guys,



I bought 6V CT70 engine in quite good condition. Now I am fitting there TB 88ccm kit (stock head). The engine is going to be installed in my restored Z50R.



I have a problem with size/height of CT70 intake manifold/carburator - there is not enough space in Z50R frame. I do not want to use aftermarket carb.

So, what you suggest:

a) Z50R carburetor and manifold (what should I modify?),

b) CT70 carburetor and Z50R manifold,

c) CT70 carburetor with manifold like Monkey bike Dax st50 st70 z50 M50 carb inlet manifold (aukcja 110537882654) - aukcje eBay.pl | Zakupy bez granic!



Thnx!

 

[HondaFiddyMan]

I'll take whats behind door number 2.

 

[dirtbkr188]

I believe your only option is to use the stock Z50 carb and manifold, the CT carb will not bolt up to the Z manifold, and would bottom out on the cylinder, if it did mount up. Since you're using the stock head, and do not want to go to an aftermarket carb, the Z setup is your only choice.

 

[HondaFiddyMan]

Agreed- I missed (stock head) sorry.

 

[mexicanyella]

Hi Guys,



I bought 6V CT70 engine in quite good condition. Now I am fitting there TB 88ccm kit (stock head). The engine is going to be installed in my restored Z50R.

Adding to what dirtbkr188 said, I think you'll find that even with the tiny stock 50cc engine's carb, you'll still feel a usable and fun torque increase from the increased displacement. I've not ridden a stock-head 88 with a stock carb, but I've ridden a stock CT70 motor swapped into a hardtail Z50, using the hardtail Z50's stock carb, manifold and exhaust bolted to the 70 head. Even with the manifold-to-port and port-to-exhaust mismatch, it ran great and the front end was quite easy to get off the ground in second gear.



May need to richen the jetting a little; try it and see.

 

[karasman]

how about gate c)?

This aftermarket manifold is a bit twisted - I am not sure but it should give me a possibility to install CT70 carb. What you think?



power decrease caused by smaller carburator is too big to be forgotten...

 

[chipwich]

It's a _really_ tight fit, but I was able to do it using:



Hooper Imports Experts on Chinese Motorcycles and Parts, Engines - Product Detail



and the 60mm from this list...



Hooper Imports Experts on Chinese Motorcycles and Parts, Engines - Product Detail





YMMV