That's a similar problem to what I was experiencing as well. Posted on the same day, over here http://www.motoredbikes.com/viewtopic.php?t=340
This kit was also from dax and purchased early december (06). When were the caps updated? The "new improved" cap listed on the thatsdax site looks exactly like the one that came with our kit and performs as stated in my post, and in the above post. What is the difference between the two?
I figure I may just find one locally.
-edit- 4 hours later: Very Locally! I actually had one within 3 yards of where I typed the above message. It's an old moped cap that is a quite bit higher quality and works perfectly; all the tilts, vibration, and fullness I want....no seepage so far.
hey this is Heath, co-owner of the bike with Ethan. the moped cap works great. we rode the bike quite a bit today (when we should have been working) and it did great. it's a cap off a Garelli. don't know if they are all the same or not. as a side note, it's a much more attractive cap as well!
This new (used) cap is vented as well. It's just a higher quality cap (plus it really does look alot better).
I'd check out a local small engine shop for a used one if you don't enjoy gas spilling everywhere. If these are the new "improved" caps, I'd hate to see the old ones. If you want a new (or possibly used) or a even a locking cap here are some places that may have some.
I've ordered parts from the first three and have had good experiences with all of them (especially Dan at 1977)
this sounds weird guys but how about not filling the tanks so high .....ours leaked when we filled them to the max but after the first lap full of gas (1 yr ago) I just did not fill the tank as much and did not have any trouble after that .
I changed tanks to a chopper teardrop with a locking cap and now I can fill the tank to the top. (2.5 gal)