if they are not in spec follow along.
rotate the crank, so that the number 1 on the exhaust cam gear is parallel to the cylinder head. the one will be pointing to the front of the bike. at the top of the cam the number 2 will be pointing straight up.
on the the intake cam, the number 3 will be pointing straight up.
depending on what reading was in spec. and out of spec. will determine if you need to remove both cams or just one.
i put a zip tie on the intake cam gear and chain. to hold the chain up and in place. my exhaust cam was out of spec.
now that you have the timing marks set remove the cam chain tension adjuster.
when its out you can check it and make sure its not getting stuck.
now go back to the top and you will remove the camshaft journal holders.
look at them and look at them very well, there are numbers on all the bolts that you see.
Be sure to loosen the camshaft journal holder bolts evenly by shifting the wrench in the descending order
i started in the outside and criss crossed toward the center, doing 1/4 turns until the journal holder bolts came loose. one they were all loose, i put them on a shop cloth in the order i took them out.
once they are all out. you can remove them journal holders
DO NOT USE A PRY BAR OR SCREWDRIVER
to pop up the journal holders. this will take some time but gently pull up on each one. and they will eventually come out. it took me about 20-25 mins to get both of mine off, they were on there really tight. when you get them out, note the location of the dowel pins.
when you pull them out remove the reed valves and inspect for carbon build up.
i was working on the exhaust cam so i left the intake cam in place.
using a magnet pop out the tappets and keep them in order to their corresponding location.
flip the tappet upside down and you will see the shims on the inside.
i didn't snap a pic of how they look as i removed them. but this is what they look like
take them out and measure the thickness using a caliper, this reading is called PRESENT
SHIM SIZE write it down next to the MEASURED VALVE CLEARANCE number.
now that you have all the readings, go to the manual and open it up to the page where you have the
shim selection table for the intake side and the exhaust side.
HOW TO USE THIS CHART:
I. Measure valve clearance. “ENGINE IS COLD”
II. Measure present shim size.
III. Match clearance in vertical column with present shim size in horizontal
Valve clearance is 0.23 mm
Present shim size 1.70 mm
Shim size to be used 1.80 mm
write down all the sizes of shims that you need and go buy them if you don't have them already.
when you get the new ones, coat them in oil. and place them in the corresponding locations according to what you wrote down. i used the magnet to hold it in the center of the tappet while i put them back in there spot.
now that you have all the tappets back in, its time for the cam shaft.
coat the cam in oil and gently put it back into place.
slide the timing chain over the cam sprocket.
from the arrow next to the 3 on the intake cam gear, look at where its pointing.
its pointing to a rivet in the chain. now count 12 rivets towards the exhaust cam
the number 2 arrow on the exhaust cam should point to the 12th rivet in the chain.
adjust the chain accordingly to get it into place.
once its in place i used zip ties to hold it in place.
at the same time the crank bolt has not moved and is still in place
now that you are sure everything is set, its time to reinstall the journal holders
set them on top and press them down by hand.
once they are all the way down by hand, put back all the bolts you took out and kept in order.
put them back in their corresponding location.
get them all on there by hand, then use the ratchet and socket to get them in place.
i did 1/4 turn, criss crossing them. or you can follow the numbers and tighten them in order starting with number 1 do a 1/4 turn, move to number 2 do a 1/4 turn and so on. when you get to the end. start over, once you are all tightened down snugly, get the torque wrench out and torque to spec.