Exhaust for 43mm bolt spacing on Frankenstein

[trockhill67]

I'm looking into buying an MS660 Stihl Frankenstein off Ebay. The exhaust has 43mm spacing and I'm having a heck of a time finding anything that'll work. I'm looking for an expansion chamber m65 clone if possible.

 

[DieselTech]

Your going to have to make your own exhaust.

 

[trockhill67]

That's pretty much what I was afraid of. I've got a Bikeberry mz 65 clone. I might have to play with that a bit. I'm no machinist so I was really hoping to find something to buy.

 

[DieselTech]

Is your exhaust port bolt pattern on your engine 32mm or 40mm?

 

[trockhill67]

It's 43mm that's the problem. It's not a China doll. It's a stihl 660 cylinder.

 

[DieselTech]

Sorry just woke up, Lol my clutch is slipping. Let me do some research, do you have a picture of the stihl 660 exhaust port, so I have a idea what shape your exhaust port is.

 

[DieselTech]

Your clone mz65 pipe has a round port or oval port with a 40mm bolt pattern spacing correct?

 

[Chainlube]

That's pretty much what I was afraid of. I've got a Bikeberry mz 65 clone. I might have to play with that a bit. I'm no machinist so I was really hoping to find something to buy.

What is the bolt spacing on the clone pipe? Is it going to match up if you elongate the holes 1.5mm on each side?

 

[trockhill67]

Sorry just woke up, Lol my clutch is slipping. Let me do some research, do you have a picture of the stihl 660 exhaust port, so I have a idea what shape your exhaust port is.

 

[trockhill67]

Hopefully this helps. Looks like the exhaust port is pretty square to the cylinder and not angled like standard jugs.