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tuning my carbs
- uummm
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I have a 78 twin I rebuilt the carbs and the thing that the floats push on to stop the fuel has a 2.0 on it dunno if that helps I have the same exact setup with exhaust and all as you do. my bike has not really run right since the rebuild either, same exact symptoms.
well, i got my bike to run halfway right. i replaced the o-rings on the needle jets and it seems to run better, also i adjusted the timing so it was a lil more advanced than it was and it will run out to 8 grand with out any problems. the only thing its still doing is its idleing around 3 grand. i adjusted the idle screw all the way out and i have the mixture screws almost all the way in. it seems that when i put my hand over one carb its hardly sucking in any air, thats the cylinder thats running good, but on the other one when i put my hand over the carb its sucking in a lot of air. does anyone know if thats a carb issue or maybe a valve issue or something. id really like to get this thing running how it should before summer. and to cafe750, where the main needle goes into the carb that brass piece can be tapped out with a hammer and a punch, it might be worth while to take them out and inspect the o-rings, if they are bad i would reccomend replacing them, if they are bad i read somewhere that fuel can get by them and cause a rich condition and cause it to run badly still. thanks to everyone who has helped me out so far. i really appreciate the advise.
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- bountyhunter
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1979 KZ-750 Twin
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- bill_wilcox100
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See WG:
Link
How I implemented mine:
Coil Power Upgrade
IMHO, all these 30 year old bikes need this mod.
Best of success.
1977 KZ650-B1 (Stock)
Upgrades:
- Dyna S Electronic Ignition (DS2-2)
- Dyna 3 Ohm Coils (DC1-1)
- Coil Repowering Mod
- Progressive Springs Front & Rear
- Saddlemen Seat Cover
- New Metallic Red Re-Paint & Repro Badges.
Montreal, Canada
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- uummm
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- bill_wilcox100
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Z1 Ent.
The manual method of carb synching is done with a wire or drill bit placed in each carb... not while running! At least that's the way it’s done on my KZ650-B1. The idea is to get the carbs to open together, as much as possible.
The advanced method of carb synching is done with one vacuum gauge (there are several types to chose from and at different price points) connected to each carb vacuum test point and this method, when done well, is much more accurate.
Remember, your carbs could be completely different from mine so... reader be ware.
The Coil Re-powering Mod can be installed on Points and Electronic Pickup ignition systems... no problem.
If you checked out the link to my Photobucket site posted above, you will have notice that I have several diagrams. Most show the Points ignition version and one shows the Electronic Pickup ignition version of the Coil Re-powering mod.
Best of success.
1977 KZ650-B1 (Stock)
Upgrades:
- Dyna S Electronic Ignition (DS2-2)
- Dyna 3 Ohm Coils (DC1-1)
- Coil Repowering Mod
- Progressive Springs Front & Rear
- Saddlemen Seat Cover
- New Metallic Red Re-Paint & Repro Badges.
Montreal, Canada
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- uummm
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- uummm
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- nads.com
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