79cc 4 stroke frame mount build

[ZnsaneRyder]

Does anyone here have BOTH the 2.5HP and 6.5HP engines? I don't have a 2.5 anymore, since I sold it to my brother for his trailer, so I have to ask.

What parts appear to you, that may swap between the new engines?

I'm REALLY wondering if you can put a 6.5HP carburetor on the little 2.5HP engine to make it faster. The muffler seems to swap already. Also, are the valve springs different sizes?

 

[macarollo]

I'd be surprised if the carb from the 196cc would work well on the 79cc. It is designed for the bigger motor.

 

[Gen3Benz]

Does anyone here have BOTH the 2.5HP and 6.5HP engines? I don't have a 2.5 anymore, since I sold it to my brother for his trailer, so I have to ask.

I do
When I get the 2.5 running, I can swap the carbs and see if it runs.
I doubt it will without some re-jetting.
I dont think this engine will need more fuel without modding the camshaft.
It would be funny to see a push trailer with a wideband o2 hooked up to it.

 

[cspaur13]

dose anyone know what this engines idle rpms is.

 

[Gen3Benz]

Any updates?

 

[cspaur13]

not really. still waiting for all the jackshaft parts to come in

 

[Gen3Benz]

not really. still waiting for all the jackshaft parts to come in

Nice, you got parts ordered.
Did you decide on rack or frame mount?
Shifter or direct drive?

 

[cspaur13]

frame mount.
direct drive

 

[Gen3Benz]

frame mount.
direct drive

nice.
Are you gonna mount the engine so the cylinder slants forward with the output on the right.
Then run a JS behind it to swap sides and drive the rear wheel?

That is what I have been pondering....will fit in my frame alot better with cylinder pointing forward.

 

[cspaur13]

Yea thats where its going. It even fits with the muffler. But just barley.
what kind of bike are you mounting it on.
for picks of my jacshaft go to
http://motorizedbikesforum.the-talk...f4/79cc-hf-4-stroke-frame-mount-build-t85.htm
While your there would you sign up. I konw its a crapy forum now but hopefully it will be better as more people come.
Thanks,
Cody