4 whls good 2 whls better
Join Date: Jun 2009
Location: Seattle, WA
Rep Power: 1
919 Gas Tank Replacement
So I finally got sick of looking at the rashed tank on my bike, and had a mechanic install the replacement tank that's been sitting on my shelf for a couple years.
Everything seems to run great, BUT the first time I ran it for any distance (150 miles), I get it home, I go to the gas station to refill it, and the gas cap fights me. MAJOR suction. Like it has no venting at all.
1) I see pictures on eBay of replacement OEM gas caps, and they all have this little rubber thing wrapped around one of the real screwposts in the gas cap assembly. The exploded parts diagram tells me this might be the breather seal. Sounds like a thing to have, right? Well, I don't have one of them.
2) If I was missing something that acts as a valve for the tank, that only opens up when the suction is high enough, wouldn't it be venting all the time without one?
3) The bike's a CA one. That is, it has an evap canister. I don't know if the replacement tank is CA or not. Do the CA bikes vent differently?
4) If I buy an aftermarket gas cap assembly, will it be vented?