Question about 1991 Honda XR 250 R

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1991 Honda XR 250 R valve adjustment

At what position do i have the piston when setting the valve clearance

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  • Honda Master
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Hi, Craig27640 for this scenario you will need your service, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need for viewing and printing please click on the blue links below. Good luck and have a wonderful day.
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Posted on Jul 22, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 48 Answers

SOURCE: cam chain xr 250 honda

check the timing marks on the crank and cam make sure they are alligned at tdc

Posted on Jan 13, 2009

  • 3567 Answers

SOURCE: need to know how to set timing on 1989 xr 250 r motor cycle

The ignition timing on your bike is CDI based and cannot be changed. Absolutely no way to change it. Valve timing is a different matter and involves static timing marks on the OHC gear. If the bike runs at all then the valve timing is set properly as is.

Pleas rate this solution. Thanks!

Posted on Apr 05, 2009

wayneman01
  • 301 Answers

SOURCE: valve clearance on xr200 1993

.002" on the intake, and .003" on the exhaust valves (engine cold).

Posted on Nov 25, 2009

nedkelly900
  • 345 Answers

SOURCE: honda xr 125 to set tappet clearances and adjust

timing chain should be auto adjust. set valve clearence to inlet 4 thou, exhaust 6 thou

Posted on May 20, 2010

Mr BrokRench
  • 1623 Answers

SOURCE: VN900 CLASSIC VALVE CHECK. When checking

You can do it if you catch tdc on the correct stroke, but it's always better to rotate the engine after each adjustment.

Posted on Jul 25, 2011

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1 Answer

1986 yamaha radian yx600 Inline 4 Cylinder what is the firing order


there is nothing on the net so you have 2 options
call a yamaha service center or pull the rocker covers off and check the position of the rockers
when no 1 is on compression the valves will have max valve clearance so that is no 1 position
the firing order will be either 1,3,4,2 or 1,4 2,3 so the next piston to fire will be the next piston to get max valve clearance and so on
lot easier to just call a service dealer

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What is the clearance between the rocker arm and the valve spring in a GM 2.2L motor


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
you will need the firing order of the engine first
now adjust no 1 piston valves when the next piston to fire has the valves in the rock position
that is the exhaust valve just closing as the inlet is just opening a bit of movement of the crank makes either valve move up or down
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now move on to the next piston to fire and adjust the valves that were rocking
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for example
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bring up no 1 piston and adjust the valves when the valves on no 3 piston are rocking
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so when no 2 cylinder valves are in the rock position ( exhaust closing at the same time as inlet is opening) that will be no 1 piston tdc compression stroke adjust the both valves to the specification
.006" both valves
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when no 1 has valve rock adjust no 3 cylinder valves
go google and type in valve clearance of deutz 3 cylinder engine
there is another method explained where inlet of one cylinder and exhaust
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www.deutzamericas.com page 42 of the manual

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1 Answer

How do you adjust valves


Check valve clearance while the engine
is cold.

1. Turn crankshaft counterclockwise until
piston is at top dead center on the
compression stroke. This prevents the
compression release from holding the
valves open.
2. Insert a narrow screwdriver or rod into the
spark plug hole as a gauge, then slowly
turn crankshaft counterclockwise until the
piston has moved down the bore by 1/4"
(6mm).
3. Using a feeler gauge, adjust
rocker nut to obtain the clearance.
4. Hold rocker nut and tighten the rocker ball
setscrew to the torque valve.
5. Check clearance again and re-adjust, if
necessary.
6. Repeat for other valve.
7. If twin cylinder repeat the above for the other cylinder.

NOTE: On some models, the nut and setscrew
are positioned above the push rod ends.

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I bought a new short block for my Kohler CV730 25HP. I'm about to take the old cylinder, valves, rocker arms, push rods, etc. from my old engine and place on the new block. Unfortunately, I'm very...


turn the crank shaft and watch the relationship between the piston position and the cam followers. As the piston nears top dead centre you will see the exhaust cam follower start to move down and the inlet cam follower start to rise up. This will create a rocking motion of the cam followers at top dead centre. This is known as valve overlap assemble the motor in this position. Ensure the valve clearance is backed right off Turn the crank shaft one full revolution and you now have the compression stroke . This places the piston again on TDC and it is at this position you adjust the valve clearance. Check that clearance for the tappets as most engines run .010" and .012"tappet clearance. If the head is fitted last place the push rods in the cam followers if you cannot see the cam followers and it does the same job. When the top of the push rods reach the overlap situation it is just an extension of the cam followers.

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Valve Stem to Guide Clearance · Intake
0.026-0.071 mm (0.001-0.0028 in) · Exhaust
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