the rest.

in the 2nd pic, you'll see the pipes. i could not slide the cowl back any further. so after the cowl is mounted, they will be forward of the cowl glue joint. not by much though. maybe a 1/2".

the .61 pictured has the larger .75 & .90 bisson muffler on it. this motor has the same case as the .90, but the cylinder is not as tall. the glow plug on the .61 was a 1/4" away from the side of the cowl. you'll probaly have to do some cutting with the .90.