Engine Removal/Breakdown
(updated10/16/07)
Courtesy of Joe Conway (Our
Engine Expert):
Engine Removal and Break-down
Starting from the point of having
removed the seats, tank, exhaust, carbs, all the plastic chrome head
covers, and the neck covers which cover the coils up front . You will need
one those small rolling Hydraulic floor jacks. You can get one at any Auto
Parts Store
These directions should be used with the Repair
Manual for reference and you should also read thru the Cam Install Procedure
instructions as they will also apply. READ ALL INSTRUCTIONS BEFORE
STARTING
Have a full set of Metric wrenches/ sockets/
allen wrenches on hand. If your tool situation is not good I suggest going
to Sears and buying a good set.
You will need a variety of different size
sockets and wrenches including a TQ Wrench
1st Get the bike up on a
stand or use some 2x6 lumber and place it under the bike just in front of
the rear wheel. You will need to jack the bike up a little.
Now we start to take parts off.
1. Start on the left side of the bike and remove
the kick stand and let it hang.
2. Remove Floor board/foot
peg/shift lever
3. Remove the lower left rear
side trans cover and the tool cover with the key lock
4. Remove the small cover where
the clutch cable goes into on the motor. Then loosen the clutch cable
adjuster on the handle bars and go back down and slip the other end out of
the clutch arm.
5. You’ll see a bundle of wires
with connectors. Some of the wires are coming from the left side crankcase
cover. Unhook everything and cut any zip ties holing them together (remember
to re zip tie on install)
6. The tool storage unit gets
removed completely (left side only not the battery side), take your time,
there is three or four small bolts that hold it in place and one in behind
the battery that hold both sides together. Slide the fuel pum off its
retainer tabs and leave hanging in place, and the fuel filter just gets
slipped out of it’s retainer tabs but not unhooked. Also at this time remove
the speedo sensor ( 1 bolt )
Refer to the Repair manual for pics
7. At this point take the
rolling floor jack and place it under the motor. Use a couple of rags so as
not to damage the bottom and snug it up.
8. Remove the rear upper and
lower engine stays and associated bolts form the motor and frame on the left
rear of the engine/frame, there are two bolts holding each stay to the
frame. Move to the right side and remove the one remaing bolt from the rear
mount.
9. Take the Battery cover off ,
unhook the bat cables
10 Remove the floorboard/foot peg
and at the same time the rear master cylinder and brake reservoir and
carefully pull them around to the rear of the bike and let them lay.
11. There are three leads that need to be
removed on the right side, 1 is the oil sensor which can be unplugged right
by the front of the battery. You see a male/female connector. Just pull the
apart carefully
The other is a ground wire you will find a
piggy backed on the batter ground cable. Unhook at the split connector and
the negative battery cable comes out with the motor. The 3rd is the starter
motor power line, unhook from the starter. The starter stays put
12. Remove the front lower
engine stays ( mounts ). Then remove the right side down tube. Two bolts on
each end.
Are you ready?? Set up a couple
of small pieces of 2x4’s side by side to the front right side of the bike
to put the motor on after it comes out of the frame. You might want to grab
a friend to help here. The motor weighs a lot be careful.
13. Make sure the jack is pretty
much centered on the bottom of the motor and take out the remaining 4 front
upper mount bolts and she is free. Roll the jack You will have to
progressively lower it as you go. Lift the motor onto the 2 pieces of 2x’s
secure it and take a break.
Engine Procedure
END GAP THE RINGS as per the
instructions on the J&E web site. They are usually within spec. So don’t get
too crazy here
.
We are going to do one cylinder
and cam at a time. This should be a must for 1st timers working on this
motor. There have been several people who have disassembled both cylinders
at once and had some major problems due to not knowing how to set up the
motor properly. BIG PROBLEMS, BIG MONEY. Trust me and follow these steps.
WE WILL BE STARTING STARTING
WITH THE REAR CYLINDER.
MAKE SURE TO USE AMPLE ASSEMBLY
LUBE ON THE NEW CAMS AND THE PISTON PINS. THIS IS CRITICAL FOR THE INITIAL
STARTUP OF THE MOTOR. MOST FAILURES AND DAMAGE HAPPEN WITHIN THE FIRST FEW
MINUTES OF OPERATION DUE TO LACK OF LUBRICATION AND OR NOT ENOUGH ASSEMBLY
LUBE.
14. Remove the side cover from
the rear head to expose the camshaft gear. Use a large flat head screw
driver to remove both the large and small plug on the (L) crankcase cover.
Using a 22mm long socket on the crank shaft nut thru the large hole turn the
crank clockwise. Then following the instructions in the manual to bring the
rear cylinder up to TDC and line up the rear timing mark, T l , in
the small timing hole on the crankcase cover, The motor turns clockwise from
the left side. The cam gear dot may be off the head pointer slightly when
the Tl timing mark is lined up. Take note of how they align in reference to
one another, and remember for when the cylinder is going back together.
Sometimes the cam gear marks are off about a ½ tooth
15. Now we want to break the cam
gear bolt free. Use the ratchet thru the crank nut hole to keep the motor
form spinning. If it moves line everything back up after it is loose. Don’t
remove just yet. Leave the bolt finger tight
Place a piece of rag into the
timing chain slot to keep debris or parts falling
into the motor. Remove the tensioner. Remove the cam gear bolt, use a piece
of wire to keep the timing chain from falling into the motor. Remove the cam
gear and place aside. ***refer to the cam install instructions
Now it is very
important that you do not lose track of the crank shaft position. It can
move a little but don’t forget to move it back to the timing mark before
lining up the new cams. We’ll get to that soon
16. On the rear cylinder start
loosening the head nuts. There is also a cap nut in by the spark plug, and
two 6mm allen bolts by the cam chain galley. Follow the repair manual for
reference. Once they are off you will need 2 very slim regular screw
drivers.
Start tapping the driver between the head and
cylinder on opposite sides. Take your time and work up with thicker screw
drivers until you can pull the head off.
Place the head aside.
17. Take out the three bolts
holding the cylinder and repeat with the screw drivers and ease the cylinder
off the piston. Remember if the crank shaft moves don’t lose track of the
rear timing mark. Stuff rags around the piston rod. Use an all or
pointy small screw driver and remove the circlip from one side of the piston
pin. Slide the piston pin out. Be real easy if you need to tap it a little
to get it going. Remove the old piston.
Now it is time to check the end
gap of the rings all rings should have around .015 to .017 inch gap. Use the
old piston and follow the direction from the manual and the J&E. they will
most likely be OK
New Piston setup
18 The spreadable center oil
ring goes on 1st and then the lower and upper oil ring. Then the
second compression ring then the top ring (VERY IMPORTANT THE little
letter on the top two rings face up) . Follow the instructions in the
repair manual on how to space the rings. Make sure you get the piston on the
piston rod correctly. They go on one way. Match the dome of the piston with
the head. The intake valve relief is also closer to the edge of the piston.
Install one of pin clips in the piston 1st and put the piston on
the rod with the piston pin and secure it with the other pin clip.
19. Working with the head on your
bench. Remove the cam. It’s easy. 1st remove the cam retainer.,
and then put the cam gear bolt back in the cam end and use it to pull on ( a
pair of vise grips on the bolt will help to pull the cam). Next the valve
springs will be replaced with the new dual spring kit. You have to have the
cam out to remove/install the new springs. You will need to follow the
repair manual on this, and the directions that come with the springs. Keep
in mind that spring heights and clearances have already been worked out. You
should not need shims for the new springs. Just use the new lower and upper
spring retainers.
Then Slide the new cam back in the same way the
old cam came out ( look at the pointer and dot ) .
Put the Cam gear back on temporarily and line
up the dot to the head pointer. You will adjust the valves after the head is
back on and torqued down. Follow cam install directions.
.10mm intake and .12mm exhaust. Refer to the
cam install instructions
CLEAN ALL SURFACES TO READY THEM
FOR NEW GASKETS. DO NOT USE ANY TYPE OF GASKET MAKER OR SEALER WITH THESE
NEW GASKETS, AND CHECK THAT ALL THE SPACERS AND DOWL GUIDES ARE IN THERE
HOLES ON THE HEAD AND CYLINDER. REFER TO THE MANUAL
CYINDER ASSEMBLY REFER TO REPAIR
MANUAL FOR PICS
21. Slide the cylinder carefully over the piston
using one hand to work the rings into the cylinder. Again make sure the
rings are properly lined up with the little letter N on the top two rings
facing upwards
Again you want to make sure the timing mark is
still on it mark thru the timing hole. Bolt the cylinder down, TQ TO
SPECS
22. Put the head on Torque the
bolts to spec. and follow the proper tightening procedure. Put the cam
gear back on with the chain. Most 1100’s are about ½ tooth off on the rear
cylinder. Just make sure to set up the cam the way the old cam came out.
Meaning if the cam gear dot was a 1/2 tooth off the pointer it goes back in
a 1/2 tooth off the pointer. MAKE SURE TO READ THE CAM INSTALL DIRECTIONS
CAREFULLY. DON’T FORGET TO RESET THE CHAIN TENSIONERS
Don’t put the side cover on the head just
yet.
Spin the motor 290 degrees clockwise and start
over on the front cylinder. Be alert and don’t turn by the front timing mark
( I ). The easiest way is to watch the cam gear dot come up on the head
pointer as you are turning the crank. When it gets close start looking for
the timing mark. The front cylinder timing mark is the single line ( I ) cut
in the flywheel rotor. Do not use the the mark with the FI. It is not the
front timing mark.
Now Just repeat the process
AS ALWAYS DOUBLE CHECK ALL WORK.
SPIN THE MOTOR BY HAND 1ST.
DOUBLE CHECK ALL THE DIRECTIONS INCLUDING THE
CAM INSTALL.
ENGINE BREAK IN SHOULD
INCLUDE AT LEAST THREE HEAT CYCLES ON THE MOTOR ALONG WITH SOME NORMAL
RIDING. AFTER HEAT CYCLES DO SEVERAL RUNS TO HIGH RPMS, THEN LETTING THE
ENGINE DECELERATE. THIS WILL HELP WITH THE RINGS SEATING PROPERLY. I USE
3RD GEAR RUNS WHEN DOING THIS.
***Heat cycle
is letting the motor cool completely before running again.
Reinstalling the engine
into the frame is basically the reverse of taking it out. You need to tilt
the motor forward and move it in on an angle with the rear going in 1st.
Watch the right lower fixed engine stay and the mount on the engine case.
You have to get the engine case mount to the inside of this stay. Watch the
universal joint slide into the shaft pocket and make sure it goes on the
shaft. There is no real easy way to explain this but to say take your time
and have a 2nd person helping. It will slide into place easy.
Rebuilt Engine Startup Procedure - from
Cobb (Jacob Groenveld):
I
have recently rebuilt my engine -Refer post
http://forums.delphiforums.com/BRISRA/messages?msg=271.15
and I recommend the following Rebuilt Engine Startup Process be placed in
the Engine Rebuild section of the KB.
INITIAL STARTING PROCESS FOR REBUILT ENGINE:
If you have performed a complete disassembly and
rebuild of your engine then the following initial start-up process will
ensure the oil lines and feeders are fully primed and oil has been pre-
circulated throughout the engine to minimize start-up wear and tear.
This process
assumes your engine is rebuilt, topped with fresh oil and ready to start:
1. Remove
spark plugs
2. Turn
off fuel cock
3. Crank
engine over for approx 15-20 seconds or until oil warning light goes
out.
4. Wait 30
seconds and repeat step 2
5. Replace
spark plugs
6. Turn on
Fuel cock
7. Start
Engine - run until hot (have fan blowing on engine if more than 5 mins
of stationary idle)
Also recommended is an initial rebuild engine flush.
Use a lighter than normal grade of cheap dino oil 10w30 or similar and
always use a new oil filter for the initial first heat-up only. After
following the above start-up process, run the engine no longer than 15
minutes then completely drain the oil, remove and replace the oil filter
(Yes, it is only new but its full of rubbish) and then let the engine cool
down to air temperature. Add new 20w40 oil of your preference and follow the
normal Break-In procedures depending on what you rebuilt/replaced.