I have some used rc750's that im installing can anyone tell me which locations need orings. Ive read i can buy them from home depot. Any source of the legit ones? the previous owner has them all different/ ripped. also is there some kind of SPACER that i have to use? I dont think i have any.

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what numbered locations have an oring or spacer.

 

3 & 2 I believe for the pre dbw

 

Space 2 uses the same green o ring that's on it. And space 3 uses a rubber spacer (injector seal). The green o ring is pretty easy to find but I had to go to honda to get the correct injector seal for the bottom of the injector. They r only 6 bucks at honda so not bad. And that's all u shud need.

 

Also, you might need to takke a dremmell and bore out the inside of the bottom spacer when you get them. This keeps them from being squeezed out and broken when entering the port of the manifold where they sit. If you don't do that then there is a chance the injector could bust the seal