Will not go over 4.5k rpm

check your vacuum petcock hose for gas inside of it.
 

Good point, a cracked diaphragm of the vaccum accutated petcock will suck a lot of fuel.
Your spark plugs look like wet and fuel fouled.

GpzGreen wrote:

ckahleer wrote:

My guess is a stuck timing advancer. 

We did remove the timing cover thingee and cleaned things up and lubed it where the manual specified.  
Seemed to spring like it should but do not think there is anything to adjust/test as there are no points.

 

Did you mention earlier that TK 26 Carbs were previously on it?



 

Not sure if this will be of help or not, but you might want to try the 60/40 rule.  

www.motorcycleproject.com/text/the_60-40_rule.html

F64 wrote:

check your vacuum petcock hose for gas inside of it.

 

Always dry.

Scirocco wrote:

Good point, a cracked diaphragm of the vaccum accutated petcock will suck a lot of fuel.
Your spark plugs look like wet and fuel fouled.

Petcock was completely rebuilt.

daveo wrote:

GpzGreen wrote:

ckahleer wrote:

My guess is a stuck timing advancer. 

We did remove the timing cover thingee and cleaned things up and lubed it where the manual specified.  
Seemed to spring like it should but do not think there is anything to adjust/test as there are no points.


 

Did you mention earlier that TK 26 Carbs were previously on it?

 

TK26 carbs are stock and still on the bike, just gone through many times.

We took apart the timing cover side.  Pick-up coils tested good, right in the center of the resistance range.
  
The Timing Rotor does not really line up with the "TEC" mark.  Pictures also of the Rotor seen from the mounting "notches" side.


Thank you for all of the replies!!

 

A bit "left field" but given how long it's been standing have you checked nothing has built a nest in your exhaust causing a blockage !

Wookie58 wrote:

A bit "left field" but given how long it's been standing have you checked nothing has built a nest in your exhaust causing a blockage !

Good idea, but the exhaust is nearly a straight pipe, no critter remnants there.

Also, last time I had it running my son checked all 4 pipes at the headers and got even readings of about 370 degrees Fahrenheit.

GpzGreen wrote:

daveo wrote:

GpzGreen wrote:

ckahleer wrote:

My guess is a stuck timing advancer. 

We did remove the timing cover thingee and cleaned things up and lubed it where the manual specified.  
Seemed to spring like it should but do not think there is anything to adjust/test as there are no points.



 

Did you mention earlier that TK 26 Carbs were previously on it?

 

TK26 carbs are stock and still on the bike, just gone through many times.
 

Teikei TK-26 Carburetor info:

gpzweb.s3-website-us-east-1.amazonaws.co...ge/TK26mainPage.html

Carb have been gone through, all passages clear and all O-rings replaced.

Does the Timing Rotor position matter if the timing marks line up when we test with a strobe light?