Wow, that was exciting! I just ran my very first tuned pipe. It took me several minutes to find the right needle valve setting to get it running ( don't have the engine's manual). At first I used the pressure fitting on the Rossi header and the rpms seemed to pulse; I didn't have it leaned out, either. I switched to the pressure fitting on the pipe, which is just before the widest part, and it really smoothed out. Man, this thing howls at WOT! I used an APC 11x8. I have read that pipes make needle settings more critical and this seems to be the case with the Picco. It didn't take too much turning to make it jump to a lean setting.

I haven't even started taching it or cutting the header. I will need to do this at the field since it's a bit loud for the neighbors to tolerate for long. Even at the stock length you can tell this thing is really screaming.

I need to find out the thread size of the crankshaft. I didn't have the correct spinner adapter to use an aluminum spinner, so I used a Goldberg plastic spinner. That was a mistake as it kept flying off! So, if anyone knows the thread size I'd be grateful. I want to use a red anodized spinner nut which will match the head.[8D]

David