Topic: Where do I start with power loss at high speed.

[nzdreamer55]

On my 78K I use Tygon which allows for better routing since it is more flexable and does not require clamps. I routed mine so the gas runs downhill and the the filter is actually between 1 & 2 carb.

To do a proper carb synch you need to do a valve adjustment. Timing also.

Cool.  So what type of Tygon tubing.  The name Tygon is a brand of tubing not a specific type.  What type of tygon tubing did you use?  It looks like tygon fuel line is yellow.  Are you saying you put yellow fuel line on your bike?

-S

I usually get it in places that repair small engines, like Lawn tractors and snow blowers. It comes in a few colors. I have yellow on there now and you can't see it. It comes out of the petcock into a filter with a 90 degree bend that sits between # 1 & 2 Carb. It goes down hill in a fairly straight line.

Any chance you can attach a picture of this?


Also to everyone...

What order would you follow to tune up this system (valves, then timing, then idle adjustment, then sync?)  Any thing l else I forgot?

-S

[MoMo]

valves, cam chain, timing, carb sync,  has been my regimen for awhile

[nzdreamer55]

Thanks MoMo.

Checked and set the valves, did the cam chain adjustment, set the timing (wow it was really off) and tried to sync the carbs but am having some trouble.  It seems like the vacuum from #2 (the one I cannot adjust) is low.  No matter how I try to bring the others down (I turn the screw in on # 1,3&4) this pushed the needle and throttle valve down and should drop the vacuum in those carbs make it closer to the #2, but the engine starts to die and I have to turn the throttle set screw to keep her running.

Is there a neutral starting place where I can turn the arm set link screw (this is the screw you adjust to sync the carbs on this set of carbs ) and then go from there?  Like 2 turns from the bottom or make it flush with the locking nut and then adjust, etc.

Thanks

-S

[flybox1]

tygon yellow is the only one fuel rated.
This is motion pro blue fuel line.
http://www.amazon.com/Visu-Filter-FF707C-Visu-Filter-Element/sim/B000UKO3VW/2