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Normal RPM

Discussion in 'XJ Technical Chat' started by gungrave9009, May 23, 2014.

  1. gungrave9009

    gungrave9009 Member

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    81 maxim 650

    I was wondering what my rpms should look like at 60 mph? It seems like i've lost some power recently and I'm only pulling about 4500 rpm at 60. Seems like bike my doesn't want to rev very high. Also feels a bit sluggish, I was thinking it might be time to clean the carbs. Any suggestions?
     
    gungrave9009, May 23, 2014
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  2. paul.hardy

    paul.hardy Member

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    Or you air filter. Dirty air filter will do this to a motor
     
    paul.hardy, May 23, 2014
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  3. gungrave9009

    gungrave9009 Member

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    I had checked it last weekend and it seemed clean, i'll pull it again and give it a cleaning.
     
    gungrave9009, May 23, 2014
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  4. paul.hardy

    paul.hardy Member

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    Just saying might not be the problem but good thing to check. Before you ripp into your garbs
     
    paul.hardy, May 23, 2014
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  5. tabaka45

    tabaka45 Well-Known Member

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    My XJ 700N revs approx. 4650 at 60 mph
     
    tabaka45, May 23, 2014
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  6. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    How many miles on it; and more importantly how many miles since you last checked your valve clearances?
     
    bigfitz52, May 23, 2014
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  7. gungrave9009

    gungrave9009 Member

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    18.6k miles. I haven't checked the valve clearances yet, I've read your write-up I've just been kind of scared to do them myself. Guess i'll get a buddy and get on those ASAP.
     
    gungrave9009, May 23, 2014
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  8. Polock

    Polock Well-Known Member

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    the rpm@mph will be the same no matter what, unless the clutch slips
     
    Polock, May 23, 2014
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  9. gungrave9009

    gungrave9009 Member

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    The reason i ask is because at 60 mph my bike usually sits at 5k or right over. I got on the other day and went for a ride and noticed my rpms were running lower then normal and accelerating is a bit sluggish. I can tell I'm losing power compared to how it has normally run. Just trying to figure out where to look first.
     
    gungrave9009, May 23, 2014
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  10. tabaka45

    tabaka45 Well-Known Member

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    I'm with Polock, regardless of the power issue, the rpm's should not change.

    I'm wondering if you have a fuel delivery issue--clogged inline fuel filter, trash in carbs, etc.

    Also, do the valves and BigFitz suggested. It's not hard, but if you need shims it may take a few days to get them. So, no reason to get in a hurry.
     
    tabaka45, May 23, 2014
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  11. Gary650

    Gary650 New Member

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    Check your local bike shop for the shims. 2014 Kawasaki klr 650 uses 29 mm shims. Make sure to bring your digital caliper to check for the correct sizing. They are not all perfectly sized.
     
    Gary650, May 24, 2014
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  12. ColoradoDan

    ColoradoDan Active Member

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    Or do what I did last month, and bring the old shim with you. I had a 275 and needed the 270. The dude brought out a 270, but it was a 29.5. The difference in my fingers was like a nickel to a penny.
    We only determined it was a 29.5 after I showed him the diameter diff., and he measured it then.

    When he found a 29, 270 it was a perfect match in diameter holding with my fingers.
     
    ColoradoDan, May 24, 2014
    #12

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