900 big bore set up

M

mormud

Free Member

Feb 6, 2010

168

5

18

Munising, Mi.

• Dec 11, 2017

• #1

Anyone have a set up for Carl's 900 big bore. I just bought a 2013 pro 900 big bore, slp pipe.its set up for togwotee. I'm at 0 - 1000 elevation here put 70 gram weights in it and it falls on it's face around 7200 rpm. Feels like it runs really rich

 

BILTIT

Well-known member

Premium Member

Apr 9, 2011

1,682

482

83

45

Lloydminster, SK

• Dec 11, 2017

• #2

Call Carl's.


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8540shiers

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Lifetime Membership

Oct 22, 2008

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8

56

Kearney, NE

• Dec 11, 2017

• #3

I just replaced the exhaust temp sensor on mine. Mine was doing the same thing last spring your describing. The Polaris dealer found the code for the sensor. the engine was a complete rebuild from Carl's last winter. I only sent them the engine, last ride of the year it wouldn't go over 6800 rpms. New sensor, Runs crisp again!

 

M

mormud

Free Member

Feb 6, 2010

168

5

18

Munising, Mi.

• Dec 11, 2017

• #4

Thanks I'll check that out. It didn't show up on the check engine light? I did call Carl's, they were supposed to check with another guy and call me back. I'll call tomorrow.

 

M

mormud

Free Member

Feb 6, 2010

168

5

18

Munising, Mi.

• Dec 12, 2017

• #5

Talked with someone at Carl's, couldn't give me much, except check everything. Need to check what head is on it, might need to run some race fuel. They have not really tested at sea level.

 

8540shiers

Member

Lifetime Membership

Oct 22, 2008

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10

8

56

Kearney, NE

• Dec 13, 2017

• #6

I've never adjusted the power commander, but I always ride at 7-10K feet. In central Nebraska 2100 feet, mine runs very rich also. Might just be in the setup. When the exhaust temp sensor went out, I was getting a red light engine code but I didn't hold the brake and check the select button when the light was on to see the code. Couldn't make the engine light come on when I got home.

 

M

mormud

Free Member

Feb 6, 2010

168

5

18

Munising, Mi.

• Dec 18, 2017

• #7

Tried new egt sensor today, and a few changes on pcv. Nothing helped. After talking to Carl's, I am going to get the low compression domes and go from there

 

M

mormud

Free Member

Feb 6, 2010

168

5

18

Munising, Mi.

• Jan 17, 2018

• #8

So, I changed to the low elevation heads, no help. Put on new fuel filter, seems a little better, but still bogging at random around 7200 rpm. Could I need to change helix? Running a 62-44-46, with gold/black spring