1989 KX 80: Better low end power

M

Midhigh

~SPONSOR~

Jul 19, 2002

481

0

• Oct 14, 2002

• #1

Can anyone give me suggestions on increaseing the low end power of this bike. It runs very weak in the lower rpm's but when it is on the pipe it explodes(but kind of hard to get it their). I have an FMF fatty pipe and silencer, and rejetted to 122 jet. I run 36:1 fuel/oil mixture. What else can I try?
Help me please!

 

kdxtaz

~SPONSOR~

Mar 29, 2002

384

0

• Oct 18, 2002

• #2

1. Proper compression
2. Proper jetting
3. Are the reeds in good shape?
4. Lower gearing (smaller front sprocket, larger rear)always boosts low end.

 

M

Midhigh

~SPONSOR~

Jul 19, 2002

481

0

• Oct 19, 2002

• Thread starter
• #3

I just replaced the reeds. The old ones had a slight gap in both reeds. Does the gap in the reeds effect the running of the bike (i.e. rich and bogging out) that much?

 

Jasle

Sponsoring Member

Nov 27, 2001

1,358

0

• Oct 20, 2002

• #4

Originally posted by Midhigh
I just replaced the reeds. The old ones had a slight gap in both reeds. Does the gap in the reeds effect the running of the bike (i.e. rich and bogging out) that much?

Click to expand...

YES.
If you check everything and still don't like the bottom end you could send your cylinder off for bottom end porting from Eric Gorr. Look to the left of the screen and you'll find his flaming piston add. He works wonders.
If I remember correctly the 89 is pre power valve? All topend is pretty much how that bike works!