I have been running my ZEX 75 shot for a bit now, and looking to up my shot to 100. Is it safe w/o any tuning on my NPI motor? I heard my pistons are weak, and they dont like nitrous very well. Is there anyone running 100 shot on their NPI motor??

 

Go for it. 100 shot won't hurt it. I have a PI motor but the bottom ends are the same and I sprayed 100 shot for a year before I got the blower. I have a friend with a stock motor and a good tune running a 200 shot. It took nearly 2 years before he finally blew the engine.

 

go for it im running a 100 with a PI swap