what does the one do with the return vapor line from the fuel tank if your not going to use the stock venting block the mounts to the firewall, what should I vent it to? I'll be running a sidedraft weber.

Also, the vapor can back in the trunk area, I'm pretty clear on all the hose connections but what about the one that goes under the metal cover plate along with the filler neck hose? It looks like it runs from the vent port on the top right hand side of the tank coming through the floor into a T then under the cover plate - where's it go???

Thanks!

[ddgonzal: updated subject]

I may have partially answered my own question regarding the flow guide valve - if I use it where does it connect both to a Weber DCOE & the crankcase on an A15 block?

bump - anyone have an answer on this?

thanks!

For later Australia 1200 and Japan 1200, the Tank vent connects to the Charcoal Canister. Same for B210 and B310s in USA. It uses a check valve beween the tank and the canister. I recommend doing that. This is a proven system, cleans the air and has no performance costs.

For USA 1200s, and mid-Japan 1200s, the Fuel Tank vent line vents to the 1) air cleaner and 2) the PCV tube on the block. This stores the fumes in the crankcase instead of the Charcoal Canister. It's simpler, cheaper but not as good for your engine.

For non-USA coupes, they just dumped fuel tank vapours on the top of the fuel tank -- vented straight to the atmosphere. I don't recommend this as it pollutes the environment. And fuel smell can get into the passenger compartment.