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Warm up revs

Discussion in 'XJ Technical Chat' started by Beanz, Apr 18, 2009.

  1. Beanz

    Beanz Member

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    Did a quick search about chokes and rpms but most people are asking what went wrong with their carb cleaning.

    I haven't touched anything on my bike (yet) but I was wondering what is a normal rpm range for letting your bike warm up with the choke on full? My bike jumps to about 3500 which seems pretty high so I usually back the choke off to about 2000-2500. This leaves the choke about 1/4 open.

    I'm not a mechanic so when I say "open" I just mean how far I have it cranked from the starting position. :roll:
     
    Beanz, Apr 18, 2009
    #1
  2. Polock

    Polock Well-Known Member

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    2 to 2.5 is about right, 3 at full ain't bad either
    at full on mine sputters a little from too much fuel, so i back it off to around 1/2 maybe less
    hows it run after it's warm
     
    Polock, Apr 18, 2009
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  3. wizard

    wizard Active Member

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    I'd say you are doing the right thing, as the revs rise, back off the choke.
     
    wizard, Apr 18, 2009
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  4. Beanz

    Beanz Member

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    Thanks.

    It runs very well. If I hop on it and open the throttle quickly it will hesitate but only the very first time. After that, flawless.

    Can I adjust the choke cable so that full open does rev it so high?
     
    Beanz, Apr 18, 2009
    #4
  5. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Yep. In the middle of summer, my '81 needs only about 1/3 "choke" to start and warms up almost immediately.

    I usually keep easing the choke off to hold the motor around 2500-2Krpm if I bring it down too far when cold it stumbles. You've got it right.
     
    bigfitz52, Apr 18, 2009
    #5

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