Ironhead winding idle up excessively to start bike.

[73HEAD]

Originally Posted by billeuze

2" diameter primaries is too big for our engines. Slows down the exhaust gas speed too much and makes for less scavenging. 1-3/4" pipes are the best standard size until you get into much bigger engines - i forget how big but probably bigger than 100 cubic inch.

As for 2 into one vs 2 into 2 vs tru duals. Unless you are trying to squeeze as much performance as you can out of it, the one you like the look and sound of best is the one to use. It can get into a whole debate that should probably be a new thread

edit: Sorry 73head. I forgot that you were the original poster in this thread. If you want to veer your own thread into an exhaust discussion then go for it.

no problems bro. Thanks for your opinion . Everything im doing with this machine is guess work. I value older riders experiences that have the runs on the board. Theres no other ironhead rider for a million miles so i seek the kind of answer you gave. Ive got the ironhead bug and i want this thing to go its best. Cheers.