New top end --- rich and won't run

C

Colorado

Member

Apr 2, 2005

228

0

• Sep 2, 2005

• #1

Hi all,

Did a new top end on my '78 IT400. Soaked and went through the carb while the machine work was being done.

Now it starts, and runs if I nurse the throttle, but never revs up strong. It's also smoking big time. I used the jets that were already in the carb, which may have been tuned for 20:1, but am now running Klotz techniplate @ 32:1.

Any obvious things I'm missing?

 

A

AsheyYz250

Member

Jul 30, 2005

24

0

• Sep 3, 2005

• #2

Try running the klotz at about 40:1. i had trouble running it in my bike at 32:1 and was fouling plugs like crazy. try that to start.

 

C

Colorado

Member

Apr 2, 2005

228

0

• Sep 5, 2005

• Thread starter
• #3

AsheyYz250 said:

Try running the klotz at about 40:1. i had trouble running it in my bike at 32:1 and was fouling plugs like crazy. try that to start.

Click to expand...

Thanks Ashey, but I'm breaking in a new top end. I can't convince myself to use even less oil.

 

F

FruDaddy

Member

Aug 21, 2005

2,854

0

• Sep 6, 2005

• #4

Try adjusting the needle, if it's adjustable, and maybe the main jet. Especially if you are committed to 32:1. As someone else recently said on this forum, "pick a ratio, the jet accordingly." Once is is jetted correctly, stick you the mix ratio, if you change it you will have to rejet.

 

C

cr_kid

Member

Aug 13, 2005

11

0

• Sep 14, 2005

• #5

The smoking is alright because of the amount of oil you are using, try ajusting the timming. I dont know much about your bike so i cant tell you if you have to advance or retart. Is it easy to start? When starting, does it kick back on you sometimes?