I wonder if any of you guys can help me out.
I just finished my bike build and I simply cannot get her running the way she should. She fires up sounds good when you rev the motor, revs are quick and responsive.
However if you take her for a spin acceleration is not that smooth as she feels fuel or air starved, she is holding back a lot. You cannot really feel a much of a pull if you try to push and at about 5000-6000 rpm it feels that's all shes got. Generally rough running and running rich with carbon build up on the plugs. I clean the plugs between very short test rides and the carbon seems to build up quite quickly after a few minutes I limp back home and the feeling is fuel starved.
Because I have gone through most things I'm thinking carb floats which I have not measured on reassembly but float bowls seem to be filling and not overflowing. My other thought is jet size and needle position.
So this is what I have:
1976 CB750F with 811cc kit, new piston rings, head gasket, valve adjustment
New Dyna 5 Ohm coils, New leads, new plugs new wire harness
New Accel electronic ignition.
New Regulator, New Rectifier, new battery, new fuse box, all new wiring.
Freshly Rebuilt carbs, Slow Jet = 40, main jet = 120, needle position is 3 up, brand new carb boots
experimented with air/idle mixture from 3/4 turn out to 2 turns out.
Gas tank and new petcock all new clean and flowing with all new fuel lines
Checked, double checked, triple checked fuel flow from tank through new clear fuel lines.
NOS breadbox filter
balanced and tuned carbs
Cleaned out main jets and it makes no difference.
Need to change jet size?, Adjust carb floats?, any other thoughts greatly appreciated, fires and sounds great while in neutral...its when your riding its quickly deteriorates.
I'm certainly no master mechanic so any help would be greatly appreciated!
