I've been involved with N2O since 1987, we've set some records along the way, my oldest son has 3 Pro-Mod world championships using it, and my daughter-in-law, not only being the ADRL's fastest and quickest female drag racer (4.02 @ 180.41 mph) has had 1 PMX world championship with N2O. There's some combined experience here.
1- The sky is the limit on power production.
2- Street use, with most power adders, N2O included, the engine doesn't care about valve size, head porting, or big cams.
3- Like anything else, "too much of a good thing can get you, or your engine n trouble (parts breakage).
4- If you keep the jetting, and timing spot on, your engine will live for a very long time. (As long as stock).
5- S&S components are CERTAINALLY strong enough to handle a reasonable load of N2O.
6- DON'T use the little 10 0z. bottle systems.
Hope this clears up any myths, or "I think" statements. If your breaking parts you ARE doing something wrong.
You need to follow the manufacturer's directions, and ask questions on what you DON'T understand.
John :2thumbs:
Oh by the way, !!!!!! I have a number of V-Twins on juice roaming around.