- Posts: 31
- Thank you received: 0
bad throttle response at low rpms
- toof
- Topic Author
- Offline
- User
- i was born here all my life
toofless dan
santa fe nm
1980 kz750 ltd twin
Please Log in or Create an account to join the conversation.
- kawa12
- Offline
- User
- Posts: 10
- Thank you received: 0
Please Log in or Create an account to join the conversation.
- toof
- Topic Author
- Offline
- User
- i was born here all my life
- Posts: 31
- Thank you received: 0
toofless dan
santa fe nm
1980 kz750 ltd twin
Please Log in or Create an account to join the conversation.
- Skyman
- Offline
- User
- 1978 KZ1000-B2 LTD 1982 KZ1000-M2 CSR
- Posts: 913
- Thank you received: 3
May sound stupid, i dont care.. how do you do that?:S
By throwing money at it! :silly:
Seriously, you can start with the mixture screws. Depending on what type you have, you will either open them up or close them down a bit. I'm not familiar with the 750 twin, so I don't know what kind of carbs you have. Some carbs had fuel mixture screws, which you would turn out to enrichen the pilot circuit. Others have air screws which you would turn in to enrichen it.
Next, you can look at changing the pilot jets to a bigger size.
West Linn, OR
Please Log in or Create an account to join the conversation.
- bountyhunter
- Offline
- User
- Posts: 7246
- Thank you received: 337
1979 KZ-750 Twin
Please Log in or Create an account to join the conversation.
- toof
- Topic Author
- Offline
- User
- i was born here all my life
- Posts: 31
- Thank you received: 0
toofless dan
santa fe nm
1980 kz750 ltd twin
Please Log in or Create an account to join the conversation.
- Skyman
- Offline
- User
- 1978 KZ1000-B2 LTD 1982 KZ1000-M2 CSR
- Posts: 913
- Thank you received: 3
www.nrp-carbs.com/
West Linn, OR
Please Log in or Create an account to join the conversation.
- wiredgeorge
- Offline
- User
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
Please Log in or Create an account to join the conversation.
- toof
- Topic Author
- Offline
- User
- i was born here all my life
- Posts: 31
- Thank you received: 0
I cant seem to find any specs on my carbs for whatever reason. I have actually been having good luck with the manual so far. The bike is running better now than after I got it back from the only vintage mechanic in town! :S So if anyone can help me locate this magic mixtre adjusting screw, I will be forever greatful! thanks again! toof
toofless dan
santa fe nm
1980 kz750 ltd twin
Please Log in or Create an account to join the conversation.
- kawa12
- Offline
- User
- Posts: 10
- Thank you received: 0
Here is a good site for microfich so you can see an exploded view of the carbs www.cheapcycleparts.com
Please Log in or Create an account to join the conversation.
- Abner
- Offline
- User
- Posts: 1
- Thank you received: 0
Please Log in or Create an account to join the conversation.
- wiredgeorge
- Offline
- User
Main jet, 125
Needle Jet Badge Y3,
Needle Jet 4HL14
Pilot Jet 40
starter jet 45
Service Fuel and Design Fuel Level the same,
pilot screw -blank
main air jet 1.0
There is no spec for the pilot mixture screw as it was set at the factory and not supposed to be mucked with. Try it at 1 3/4 turns out from lightly seated to begin with. Turning the screws out richens the mixture a bit. If you don't see improvement, go to a #42.5 BS30/96 style set of pilot jets. These carbs can also leak in several places... around mixture screws, at carb holders, where the throttle rods pivot, etc. so all potential leak areas need to be checked for air leaks but your symptoms are more consistent with lean idle mixture.
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
Please Log in or Create an account to join the conversation.