- Posts: 2
- Thank you received: 0
fuel line routing question
- kz100078A2
- Topic Author
- Offline
- User
Please Log in or Create an account to join the conversation.
- Patton
- Offline
- KZr Legend
- Posts: 18640
- Thank you received: 2098
We're glad you're here!
The pic below is a typical carb setup where equipped with a single fuel inlet. This one includes a separate vacuum port to operate a vacuum operated petcock. But many carb setups don't have this separate vacuum port.
Other setups use dual fuel inlets with one between 1-2 and another between 3-4.
With a twin outlet petcock, both outlets function the same. May use both outlets with two fuel lines to dual inlet carbs, or cap one off to run a single fuel line to single inlet carbs, or use both with lines into a T and a single from the T to carbs with a single fuel inlet. With a single outlet petcock and dual inlet carbs, use single line into a T and dual lines from the T to carbs.
When using only one outlet nipple of dual outlet petcock, a common vacuum plug may be fitted to cap off the unused nipple.
The carb vacuum port is used with a vacuum operated petcock. If using a manual petcock, the vacuum port should be capped off.
Factory routing of float bowl vent lines is to open air underneath the seat. But if desired they may be routed over the swingarm to hang underneath the bike.
On each carb holder between carbs and engine, there is a vacuum port nipple. These normally remain always capped off with vacuum plugs. The ports on the carb holders are used when syncing the carbs.
Good Luck!
[Click on image for larger view]
1973 Z1
KZ900 LTD
Please Log in or Create an account to join the conversation.
- trianglelaguna
- Offline
- User
- New and improved - extra strength
- Posts: 8726
- Thank you received: 235
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
Please Log in or Create an account to join the conversation.
- kz100078A2
- Topic Author
- Offline
- User
- Posts: 2
- Thank you received: 0
Please Log in or Create an account to join the conversation.
- trianglelaguna
- Offline
- User
- New and improved - extra strength
- Posts: 8726
- Thank you received: 235
hey thanks alot for some info,its helping,i have a duel fuel intake between 1,2 and 3,4,,great no prob,have a duel maual petcock,no prob,2,figure out,whoever had this before must have done a T nd just used one side of petcock and T,duel into fuel inlets,i will just run duel hoses,no prob, my vent lines are diff,i think its vent now?they are above fuel supply lines with a T nipple,if looking at pic u had for diagram there not on carbs there on like the black spacers next 2 the float bowl vents,is that my float bowl vents, smaller size nipples,than the fuel intake lines,but right above they also swivel
yeah your on track now 90% sure the ones you speak of are vent nips....dual lines is the ticket for now and a good filter on each(i ran mine a week cheating no filter) paid the price....but i'm apro at cleaning em now..lol...welcome cool bike...
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
Please Log in or Create an account to join the conversation.
- Sactown900
- Offline
- User
- Posts: 83
- Thank you received: 4
Please Log in or Create an account to join the conversation.