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The location of cam sprockets were the marks should point when piston is at TDC on a 2000 kymco venox motorcycle

Posted by Scott Williams on

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1 Answer

Steve P

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  • Kymco Master
  • 3,712 Answers

Hey Scott.. not sure of the marks.. BUT the cam lobes should be opposite of the rocker arms or buckets,,, ON TDC on the COMPRESSION STROKE<<

Posted on Aug 11, 2017

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5 Related Answers

rockitman187

Randy Hough

  • 2559 Answers

SOURCE: Honda CRF 100 timing

Turn the motor over clockwise until the punch mark on the gear lines up with the arrow mark on the side case. Check to be sure that the cam lobes are facing to the rear of the bike, if they are pointing toward the front keep going until they face back and the punch mark aligns up with the mark on the case.ab798e0.jpg

Check the cam gear to make sure the two marks on the gear are level with the surface of the head.
559cda1.jpg

Please rate this FIXYA

Posted on Jan 29, 2009

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martin538

steven martin

  • 117 Answers

SOURCE: Cam timing marks

Try this diagram, it may help.5f00a16.png

Posted on Apr 13, 2009

Anonymous

  • 172 Answers

SOURCE: Timing marks on 1999 Ford Ranger 2.5L.

Rotate the engine so that No. 1 cylinder is at TDC on the compression stroke. Check that the timing marks are aligned on the camshaft and crankshaft pulleys. An access plug is provided in the cam belt cover so that the camshaft timing can be checked without removal of the cover or any other parts. Set the crankshaft to TDC by aligning the timing mark on the crank pulley with the TDC mark on the belt cover. Look through the access hole in the belt cover to make sure that the timing mark on the cam drive sprocket is lined up with the pointer on the inner belt cover.

  1. Loosen the alternator retaining bolts and remove the drive belt from the pulleys. Remove the water pump pulley.
  2. Loosen and position the power steering pump mounting bracket and position it aside.
  3. Remove the four timing belt outer cover retaining bolts and remove the cover. Remove the crankshaft pulley and belt guide.
  4. Loosen the belt tensioner pulley assembly, then position a camshaft belt adjuster tool (T74P-6254-A or equivalent) on the tension spring rollpin and retract the belt tensioner away from the timing belt. Tighten the adjustment bolt to lock the tensioner in the retracted position.
  5. Remove the timing belt.

To install:
  1. Install the new belt over the crankshaft sprocket and then counterclockwise over the auxiliary and camshaft sprockets, making sure the lugs on the belt properly engage the sprocket teeth on the pulleys. Be careful not to rotate the pulleys when installing the belt.
  2. Release the timing belt tensioner pulley, allowing the tensioner to take up the belt slack. If the spring does not have enough tension to move the roller against the belt (belt hangs loose), it might be necessary to manually push the roller against the belt and tighten the bolt.

The spring cannot be used to set belt tension; a wrench must be used on the tensioner assembly.
  1. Rotate the crankshaft two complete turns by hand (in the normal direction of rotation) to remove the slack from the belt, then tighten the tensioner adjustment and pivot bolts to specifications. Refer to the necessary illustrations. Make sure the belt is seated properly on the pulleys and that the timing marks are still in alignment when No. 1 cylinder is again at TDC/compression.
  2. Install the crankshaft pulley and belt guide.
  3. Install the timing belt cover.
  4. Install the water pump pulley and fan blades. Install upper radiator hose if necessary. Refill the cooling system.
  5. Position the alternator and drive belts, then adjust and tighten it to specifications.
  6. Start the engine and check the ignition timing. Adjust the timing, if necessary.

Posted on Nov 25, 2009

Anonymous

  • 395 Answers

SOURCE: Corolla 1.6 VVTI motor the

With engine Crankshaft on TDC and cam timing set correctly this is the position where No. 1 cylinder is firing at the start of the power stroke. At this point No. 4 cylinder is also at TDC but is just at the end of the exhaust stroke and starting the intake stroke so the exhaust valve will be almost finished closing and the inlet valve will just be starting to open. This is referred to as the inlet and exhaust valves rocking.

Posted on Jan 05, 2011

TDISLine

TDISLine

  • 1874 Answers

SOURCE: replacing timing chain 2000 corolla 1,8 eng

!!! Check first if engine valves are not bended !!!

The timing chain diagram & procedures for 2000 Toyota Corrola 1.8 engine:

Special tools:
1. Crankshaft pulley holder - Tool No. 09213-70010/11.
2. Crankshaft pulley puller - Tool No. 09950-50012.

General precautions:
1. Disconnect battery earth lead.
2. Remove spark plugs to ease turning engine.
3. Turn engine in normal direction of rotation.
4. Observe tightening torques in pictures below.
5. Do NOT turn crankshaft via camshaft or other sprockets.
6. Do NOT turn crankshaft or camshaft with timing chain removed.
7. Mark position of crankshaft position (CKP) sensor before removal.

Valve timing procedures:

tdisline_5.png
tdisline_6.png
1. Ensure crankshaft pulley and timing chain cover TDC marks aligned [1].
2. Ensure teeth timing mark on each camshaft sprocket aligned.
3. 1ZZ-FE/3ZZ-FE/4ZZ-FE [2].
4. 2ZZ-GE [12] OR [13].
5. If not, turn crankshaft pulley 360 degrees.
6. Remove chain tensioner, tensioner rail and chain guide.
7. Check chain for wear.




Posted on Jan 22, 2011

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I need model year--engine code vin to make sure I'm looking at proper info?
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I looked at info 3.0L engine vin u and vin2. With number one piston on tdc of compression stroke, the timing mark on the crank sprocket and the cam sprocket are pointing at each other. On the crank sprocket the mark is pointing up, the cam sprocket mark is pointing down.
If you have a different vin than I posted, the info may be different?

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Try eBay or a motorcycle part finder site
And on the problem of it reoccurring difficult to say as need to know what damage was caused to piston and valves
Was it just one rocker arm that broke or is the other damaged did the timing jump and piston hit open valves driving them up and breaking arm and damaging cam shaft lobes
You really need to find out why and how it happened
As it may require a complete timing system replacement on that cylinder cam shafts , rocker arms , valves ,drive sprockets top and bottom , drive chain and a piston

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I have 1987 Honda xlr250r. valve timing marks confusing me. small gear on clutch side has little vertical mark pointing up. sprocket on cam has vertical mark also up & these 2 line up but there is a...


Hey Anon, I am just assuming you have the piston at TDC.>>.on the COMPRESSION STROKE.<<< I think the little O should line up with the mating surface edge. The cam lobes must be facing 180* away from the rocker arms. The cam sprocket should line up.

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2001 honda elite 80cc


LOOK FOR AN INSPECTION COVER ON THE LH SIDE OF ENGINE, REMOVE COVER, ON TOP OF CYLINDER THERE SHOULD BE ANOTHER COVER, ALSO REMOVE. REMOVE SPARK PLUG, USE A THIS SCREW DRIVER, PUT IT INTO THE SPARK PLUG HOLE CAREFULLY ROTATE THE ROTOR IN THE DIRECTION OF ENGINE ROTATION WATCH FOR THE SCREW DRIVER TO SLOWLY COME OUT OF THE CYLINDER IT WIIL RISE AND THEN FALL, AT THE PIONT OF DIRECTION CHANGE THIS IS TDC, REVERSE IT TO TDC, SEE IF YOU CAN SEE INTO THE INSPECTION HOLE THERE SHOULD BE A LINE AND A SMALL NOTCH ON THE SIDE OF THE HOLE. NOW LOOK AT THE TOP OF THE ENGINE WERE YOU REMOVED THE SECOND COVER THE CAM SPROCKET WILL HAVE A DOT ON IT, THIS SHOULD BE POINTED TO THE TOP. THIS IS IN TIME. AGIAN, PISTON AT TDC, ROTOR FIRE MARK LINED UP WITH NOTCH IN INSPECTION HOLE, CAM SPROCKET DOT POINTED TO TOP OF CAM COVER, YOU MAY HAVE TO MAKE ONE MORE ROTATION TO GET ALL MARKS TO LINE UP AT THE SAME TIME. IF YOU HAVE REMOVED THE CAM YOU MAY HAVE TO WALK THE CHAIN AROUND THE SPROCKET TO GET IT INTO TIME, ALSO TAKE ANY DEFLECTION OUT OF CAM CHAIN.

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How do i set the timing on a yz450


Set the piston to TDC (top dead center) this is the higest point the piston will rise before moving on to the down stroke, either by lining up the marks on the crank rotor or a long screw driver (large handle so it wont fall in) down the plug hole and watch for the highest point lock or hold at this point. If cam sprocket has marks line them with the cylinder head surface (sometimes the sprocket bolts) parallel.
The cams should be fitted next on the 'compression' stroke meaing the all valves should be closed when the cams are seated (no valves being pressed by cams) generally at this point the cam lobs face away from the valves , next stroke down (ignition of fuel) valves should be closed with the exhaust cam moving round ready to rock on to the exhaust valve as the piston rises to the top again (4th stroke exhaust) as the exhaust valve lobe rocks off the intake cam lobe should be starting to rock on opening the intake valve on the down stroke of the pistion.
Trun the engine over by hand to make sure no valves are knocking the piston.
Should be as follows
1. all valve clearance free/rocking at ' TDC 1st 'down' stroke (ignition of fuel) valves closed exhaust moving round but not pressing valve ,
2. 2nd stroke 'up' exhaust valve rocking open and closing as piston tops with the intake ready to rock on as the exhaust closes and piston tops (exhaust),
3.3rd stroke 'down' (intake of fuel) as the piston moves down the intake valve should be opening.
4. 4th stroke 'up' compression of fuel all valves rocking closed as the piston rises for the compression stroke back to TDC all valves closed/rocking free.

Intake, compression , ignition and exhaust. (**** squeeze bang blow)

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1 Answer

How do I line up my marks on cam shaft and flywheel to set timing


Hi mate didn't get any info on what bike you are timing but this procedure is simular for most and is specific for WR YZ 250 426 and 450

set piston to TDC (top dead centre) this can be done by spinning the fly around until you can see the (i) mark stamped on the flywheel line up with the marks on the inspection plug hole (engine case) good idea to probe the cylinder through the spark plug hole to confirm the flywheel mark is correct (I have seen several 426) where the TDC mark does not give accurate TDC on piston so worth second guessing this process.


once TDC is set do not allow piston to move from this point on - starting with the exhaust cam with no slack on the cam chain the dot stamped on the cam sprocket should align with the face of head with the cam lobes pointing outward roughly 45 degrees towards the front wheel when this in place

you do the same with intake cam except the cam lobe will face opposite direction outward and the should be a dot aligning to the head


double check before you go further that when you put your finger in the chain tension hole and you tension the cam chain that when all slack is taken from the cam chain that your dots on both cams align with head face and that you still have piston at TDC if all checks out then this is timed set correct so torque all the cam caps back up install chain tensioner and the recheck all fly wheel marks are in correct position and piston is at TDC and the dot on each cam sprocket aligns to the head if it doesn't then re do the process

don't be surprised if this takes a few attempts as it takes the best of us usually at least two attempts to get all marks to align correctly thats why best to check and double check before you bolt it all down then you can adjust just by lifting one cam out and moving one tooth either direction


You have little room to play with and when you start putting chain on the cam sprockets you will find very little extra chain length to play with you may need to wiggle tug and pull both cams together to get them back in each time but go slow and gentle they do go in they just need to be encouraged


I happy to elaborate on any point if you need - good luck

Regards Jamie

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1 Answer

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There is no real way to change timing on YZ except change the cam itself to YZ450 cam or simular etc If your wanting to find out how to re install the cams you have already and cam chain then it is simple process but sounds complicated when its written
set piston to TDC (top dead centre) this can be done by spinning the fly around until you can see the (i) mark stamped on the flywheel line up with the marks on the inspection plug hole (engine case) good idea to probe the cylinder through the spark plug hole to confirm the flywheel mark is correct (I have seen several 426) where the TDC mark does not give accurate TDC on piston so worth second guessing this process.
once TDC is set do not allow piston to move from this point on - starting with the exhaust cam with no slack on the cam chain the dot stamped on the cam sprocket should align with the face of head with the cam lobes pointing outward roughly 45 degrees towards the front wheel when this in place you do the same with intake cam except the cam lobe will face opposite direction outward and the should be a dot aligning to the head
double check before you go further that when you put your finger in the chain tension hole and you tension the cam chain that when all slack is taken from the cam chain that your dots on both cams align with head face and that you still have piston at TDC if all checks out then this is timed set correct so torque all the cam caps back up install chain tensioner and the recheck all fly wheel marks are in correct position and piston is at TDC and the dot on each cam sprocket aligns to the head if it doesn't then re do the process don't be surprised if this takes a few attempts as it takes the best of us usually at least two attempts to get all marks to align correctly thats why best to check and double check before you bolt it all down then you can adjust just by lifting one cam out and moving one tooth either direction
You have little room to play with and when you start putting chain on the cam sprockets you will find very little extra chain length to play with you may need to wiggle tug and pull both cams together to get them back in each time but go slow and gentle they do go in they just need to be encouraged
I happy to elaborate on any point if you need - good luck

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1 Answer

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