Hey Gazza,
Thanks for the great suggestion. I'm not sure how you guys put your cap in, but, we are going to put a metallic threaded insert in the location shown in the photo's and use a plastic cap similar to the one in the photo. This way if someone were to over tighten their cap (no one ever over tightens and strips anything right
) just the cap will strip and can be replaced-inexpensively. There isn't much room up in that area as far as thickness goes, and we would be unable to put the metal threaded insert in the tank there. The other thought on the cap location was to maintain the lines of the bike as much as possible, without their being any possibility of snagging your pants or anything on it when riding or mounting or dismounting.
You do bring up a good point about getting maximum fuel capacity with the location of the cap on your version. What we figure is this. The main tank fill cap is higher than the sub tank, and the back of the bike. By using the fill cap on the sub tank you will get about 95% or better fill capacity of the sub tank, so if my math is correct you'd lose about a half liter by just using the fill cap on the sub tank, and you could get that back by using the following procedure. After filling the sub tank, you fill the front tank and gravity takes over, the higher fuel level in the main tank will fill that small remaining capacity in the sub tank, and then you just top the main tank up again, by our measurements, this shouldn't take more than a minute.
Tazer:
That's a great idea. However, if you pull the shock out of your bike and bring the wheel up to it's maximum travel there isn't too much room there for any kind of box or tool storage area. I do like your idea a lot though, it would be great to not have to wear a fanny pack!!!
Thanks to the both of you for your great input!!!
Dale