Hey there,
I was running low on funds restoring my 1983 GS450L, when I realized the vacuum petcock was leaking fuel into the vacuum port. I tried a rebuild kit off ebay, no dice.
I wound up making a manual petcock using spare material from work and a compatible fuel valve from eBay. All in, total cost would be $50 for a high quality valve which I believe competes with more expensive alternatives in almost every way, and that's if you have to buy everything from scratch.
I've attached a schematic of the final assembly, but I think you'll understand pretty quickly what I did. Here's the link to a high res PDF: https://ufile.io/xn8yfucs
I believe this should work for any medium size GS, perhaps even the larger displacement ones.
Let me know if you have any questions or concerns
s-l1600.jpgAll this stuff is off eBay:
I was running low on funds restoring my 1983 GS450L, when I realized the vacuum petcock was leaking fuel into the vacuum port. I tried a rebuild kit off ebay, no dice.
I wound up making a manual petcock using spare material from work and a compatible fuel valve from eBay. All in, total cost would be $50 for a high quality valve which I believe competes with more expensive alternatives in almost every way, and that's if you have to buy everything from scratch.
I've attached a schematic of the final assembly, but I think you'll understand pretty quickly what I did. Here's the link to a high res PDF: https://ufile.io/xn8yfucs
I believe this should work for any medium size GS, perhaps even the larger displacement ones.
Let me know if you have any questions or concerns
s-l1600.jpgAll this stuff is off eBay:
| Item | Cost Ea. |
QTY | Net Cost |
| 9mm (3/8") 6061 Al Bar | $13 | 1 | $13 |
| M14x1.5 RH Tap | $8.20 | 1 | $8.20 |
| M6x1.0x20 Stainless Button Cap Bolt | $0.87 | 2 | $1.74 |
| Manual Petcock w/ Reserve (search for GPZ/KZ750 petcock) | $10 | 1 | $10 |
| M6 Copper Washer | $0.16 | 2 | $0.32 |
| 2mm Thick Fuel-compatible gasket material (e.g. Viton) | $14.50 | 1 | $14.50 |
Grand Total: |
$47.76 |
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