Question about 1985 Yamaha XJ 700 X Maxim

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Adjust valves - 1985 Yamaha XJ 700 X Maxim

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  • Jim Webster Aug 29, 2010

    alicantecoli i have tech-cd i dont have the information i need to set the valves im new to working on bikes i picked it up as a prajeck to learn its a 1985 yamaha maxim xj 700 nc is there a ph.number i can call you or my number 513-227-1280 to explane better

  • Jim Webster Aug 29, 2010

    adjust valves on the 1985 yamaha maxim xj700 nc is over head cam ihave a tech-cd for this bike i take the cover off i see cams i dont see what i should adjust you turn the cam to take the shems out what then ihave not done this yet might do more harm than good i removed the emission can

  • Jim Webster Aug 29, 2010

    adjust valves on the 1985 yamaha maxim xj700 nc is over head cam ihave a tech-cd for this bike i take the cover off i see cams i dont see what i should adjust you turn the cam to take the shems out what then ihave not done this yet might do more harm than good i removed the emission can ph.# 513-227-1280 Jim

  • Jim Webster Aug 30, 2010

    i remove pad gauge valve lifter and cam ? do i return cam lobe as it was ?

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Here is a web site for a service manual which is great to have if your keeping this bike

The second web site link listed wants a fair price to download. The first one is free to download

http://www.rapidmaniac.com/search/relevant/All/yamaha-xj-700-x-maxim-service-manual

http://www.tradebit.com/filedetail.php/6920799-download-now-yamaha-xj700-xj-700-maxim

Posted on Aug 29, 2010

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Adjust the tappets ,now bear with me as i have never seen one but i assume its like the virago which is a twin cylinder with 4 valves so its not a complicated type with hydraulic tappets ,Now to adjust you will need to know the gaps as various makes use different setings ,but most 4stroke engines will have a greater exhaust gap than inlet now if you are not sure of the gap then 12th inlet and 15th exhaust will suffice .Now 2 cylinders with 4 valves isnt difficult just thik of 5 now with no 4 down adjust no1
no3 down adjust no 2 ,they will always add up' to 5 so with no2 down adjust no3 and no1 down adjust no4 .smae applies to 4 cylinder engine no8 down adjust no1 as this will add up to 9 ,and so on unless its overhead cam with hydraulic tappets ,if it has shims then you write down the gap on all the valves then you add or subtract the gap and add the appropiate shims ,easier said than done but its just the time taken to do this and always allow a th or two over if you have ground the valves in as they always come up a bit as the seats bed in .

Posted on Aug 29, 2010

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  • Colin Stickland
    Colin Stickland Aug 29, 2010

    well if they are manual adjustable tappets then how i describe will allow you to adjust the tappets ,the rule of one number more than the number of valves is how i was taught to do it in college many years ago befoe OHC engines were widely used like now ,Their is no secret way or special way ,if this engine has adjustable tappets then this will work ,or turn engine till no1 tappet is at the bottom then turn engine 180ªtill it comes up and then adjust the gap ,then no2 and so on ,inlet valve will be in line with the carb and exhaust with the downpipe

  • Colin Stickland
    Colin Stickland Aug 30, 2010

    right ask in dealer if their hydraulic or shimmed ,turning cam will not reveal anything ,iam telling you how to do tappets with push rods ,so its overhead cam ?now turn cam so lobe is pointing upwards then check the gap ,now with hydraulic followers it may not be possible to check the gap as the oil will hold them open so all you do here is to make sure you can turn the follower fairly easy side to side ,now providing you can do this then leave well alone as they are working ok,

  • Colin Stickland
    Colin Stickland Aug 30, 2010

    also please remember iam in spain

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08 Civic EX, valves became noisy at60K, valves quiet after warmup. They will probably still be noisy after I adjust them. Would the cause be excessive wear on the valves stem ends and rockers?


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there is no specification for what you want
the valve clearance is between the end of the rocker arm and the end if the valve stem
the stem end is proud of the spring retainer so if your rocker arm is touching the spring retainer , you have a big problem as for the procedure it is set out in the workshop manual but if you don't have a manual it can be done like this
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adjust no 1 piston valves
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follow that procedure until all the valves are adjusted
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bring up no 1 piston and adjust the valves when the valves on no 3 piston are rocking
next piston to fire is no 4 so adjust no 2 piston valves
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When the valves are adjusted on the de-compression stroke can they be re-adjusted or is the head now faulty?


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Need to find out how to adjust vavles


If your engine is an overhead valve Briggs. You need to:
Remove valve cover
Locate rocker arms. Upper is exhaust, Lower is intake.
Loosen the lock screw in the center of the adjusting nut.
With engine at TDC and both valves closed adjust both valves by turning the adjusting nut to obtain proper clearance. Once set, tighten the center lock screw.
Valve adjustment specifications vary from model to model. Would need more engine information to get you that or it can be found online.
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Overhead valves making noise like they need ajusting


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  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Remove the valve cover.
  3. Set the engine to Top Dead Center (TDC) of the compression stroke for the cylinder to be adjusted.
  4. Check the valve clearance. The valve clearance specifications are as follows:
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  5. After adjustment, tighten the locknuts to 11-14 ft. lbs. (15-19 Nm).
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feeler guage is---> thin pieces of metal cut to different sizes to hold under valve adjusters till the play and chatter gone
check by book what the feeler size needed for adjustment

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