Originally Posted by Toycar5

I have had 4-5 V-Specs/Speed engines and 1 Ninja B01a. I like all 3 engines. My choice would be 1)Speed, 2)Ninja, 3)Vspec for power delivery. However, I have been looking for a piston and sleeve for my B01a since september. It's out of stock throughout North America. I read on Neo-buggy that GRP is coming out with a tuned line of engines this year and a non-tuned sport line. I don't know what that means for my piston and sleeve. OS engine parts are everywhere. Sometimes things happen like a wristpin clip comes loose and gouges the piston/sleeve and you just need that. It sucks I've been waiting for 4 months. I have many other engines to run but still, it's annoying.

I've known atleast 3 Ninja engines that only made 4 gallons and V-Specs with more than that so reliability I would say is the same. Ease of tune I find to be similar. Someone with alot of experience says that the OS is easier tuning than the Ninja. I find qualtiy is the same betwween them.

If I wasn't so annoyed with Ninja I'd pick it over the V-Spec.

I say OS engines.