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cmpression test results

Discussion in 'XJ Technical Chat' started by ldchris2112, Mar 10, 2012.

  1. ldchris2112

    ldchris2112 New Member

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    Quick question on a 82 Maxim 750 about compression results= cylinder #1 140 dry 160 wet #2 138 dry 150 wet # 3 140 dry 150 wet # 4 142 dry 163 wet. Are these result ok
     
    ldchris2112, Mar 10, 2012
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  2. Rickinduncan

    Rickinduncan Member

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    Yep
     
    Rickinduncan, Mar 10, 2012
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  3. yamamann

    yamamann Member

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    Yes looks good - how many miles or km on the 82 Maxim 750 engine ?

    Is there a reason the two outside and two inside cylinders are closer matched - heat or timing related ? just wondering
     
    yamamann, Mar 10, 2012
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  4. ldchris2112

    ldchris2112 New Member

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    Its not my bike so its not here however I think its right around 35000 miles valves are not in spec also needs carb work just wanted to check compression before sticking any money into it thanks for the help
     
    ldchris2112, Mar 10, 2012
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  5. yamamann

    yamamann Member

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    getting ready to sync carbs - compression test results - any observations ? - DRY - 1 - 133, 2 - 130. 3 - 130, 4 - 130 WET - 1 - 160, 2 - 150, 3 - 161 and 4 - 152 - used SAE 30 viscosity oil - thanks
     
    yamamann, Mar 25, 2012
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  6. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    Check your valve clearances, adjust, and then do all the other stuff that you need to do to make it safe and reliable before riding. Sounds like you're off to a good start.

    Dave
     
    hogfiddles, Mar 25, 2012
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  7. yamamann

    yamamann Member

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    thanks - been working away on everything based on the manuel and excellent help here - replaced cables, front and rear brake pads and shoes, resealed tank, rebult carbs, rebult fuel shut off, battery, soldered in new fuse box, oil, filter changed twice in under 1000 miles, paint, headlight, turn signals, front* and rear sprockets, chain, ( * increased from 16 to 17 teeth ), exhaust pipe repair right side - need to replace some damage to chrome on bottom from previous owner, reflectors, engine crash bars being repaired soon plus probably more lol - 38,919 miles rather happy with compression tests myself - yeha - couldn't ask for a better hobby to work on in the mancave - thanks
     
    yamamann, Mar 25, 2012
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  8. yamamann

    yamamann Member

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    plan to do a complete top end re and re next winter ( will reseat and adjust valve clearances then ) looks to me also that non balanced wet tests show some slight sealing issues but hard to say since amount of oil added to each cylinder differed - been driving around town but once my new tires are installed might just start some 400 series highway driving ( 400 series in Ontario are marked at 100 km hour ) got a little cabin in the bush 150 miles north of where I live ( my fav mancave ) and the fish should be biting pretty soon - enough of me lol - feel free to weigh in with any other observations guys and girls
     
    yamamann, Mar 25, 2012
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