92KK 84WW Olaf
Life time member
Number of posts : 7954
I thought of using the breather but two things, one is that then there is no breather and therefore no vent...vacuum lock plus it will take forever for petrol to run down into the underseat tank unless it has a separate vent which will have to be higher than the fill point. The second thing is that the diameter will mean I need a fill point under the seat, which I prefer not to do because it means pulling out everything ever time it is refuelled.
Maybe combine both, pump through a non return valve to the return line AND use the tank breather. But if I do this how do I get petrol to flow down to the underseat tank - it would need one connection to be at the bottom of the main tank, ie the breather line. Is it feasible to alter the pick up point for the fuel pump by extending the pick up line down into the underseat tank?
Anyway I wont pursue this any more in this post, feels like its hijacking it. I will experiment with some shapes first and see what I can do. I think the best bet will be to make up a stainless steel one on a rubber mounting on the original battery tray and using the battery hold down clamps. Make it in plastic first and when its right get it made up in stainless steel.
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1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles.
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles
Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500