Upgrades for my bt80?

[GW's Motorized]

I built my bike with a bt80 engine kit. For those unfamiliar with it it is an electric start kit with a centrifugal clutch inside and a one piece jug. I have looked at a couple of 2 piece jugs, but I don't know if they'll fit.

I'm not very concerned about a high performance jug as I am about upgrading the exhaust.

If anyone know what will fit on my engine or what I can do to get an expansion chamber on it without custom making an exhaust I would appreciate it.

 

[Chainlube]

Check the muffler bolt hole spacing on the cylinder. If it's 40mm or 32mm, then probably any of the MZ65 clones will fit. Do you have a picture of the front of your engine in the frame? That would give us an idea of how much room you have to fit a muffler/expansion chamber.

 

[GW's Motorized]

Here is what the exhaust port looks like, it has exhaust like a kx80.
And I don't have a picture of the bike right now.

 

[Chainlube]

View attachment 185530
Here is what the exhaust port looks like, it has exhaust like a kx80.
And I don't have a picture of the bike right now.

That's cool, that picture works. What you need is a dirt bike compression fitting for that. But, unfortunately it would have to be custom if the engine vendor doesn't sell a performance pipe for it. That pipe comes out on the wrong side for off the shelf parts.

 

[GW's Motorized]

That's cool, that picture works. What you need is a dirt bike compression fitting for that. But, unfortunately it would have to be custom if the engine vendor doesn't sell a performance pipe for it. That pipe comes out on the wrong side for off the shelf parts.

I figured I'd have to custom order or make something. I could probably find some steel pipe that is the same ID, and build an exhaust or exhaust adapter

 

[Chainlube]

I figured I'd have to custom order or make something. I could probably find some steel pipe that is the same ID, and build an exhaust or exhaust adapter

Did the kit come with an exhaust seal? Cooper ring.

 

[GW's Motorized]

Did the kit come with an exhaust seal? Cooper ring.

Yes it did, it is of course on the bike though

 

[GW's Motorized]

Did some research, found out the bt 80 electric start engine has the same jug as the bt100 engine (which is not electric start)

 

[GW's Motorized]

Maybe I can use a Honda ct70 exhaust. I'm entirely concerned about power, and I think a ct70 exhaust might fit my build

 

[DAMIEN1307]

I'm entirely conserved about power

"conserved" is to keep in a safe or sound state; especially : to avoid wasteful or destructive use...Did you mean that your "not concerned" or "totally concerned" about power???...Just trying to make sense of what you just said...lol.