- Location
- RI
(This is a cross post from the "my ski and build" thread that I posted this morning - http://www.x-h2o.com/threads/132186-First-build)
I was given a 1988 650sx by a friend and have been slowly disassembling and cleaning it for the past few months. I have never ridden a stand up and have no prior experience with them but I have tried to take it slowly and read up on everything as I go. I have also never rebuilt anything like this before.
Right now I am deciding whether or not to replace the lower portion of the crankcase, all of the crankcase, or just use what I have. The ski had been sitting with dirt, mold, and water in it for years and the bottom portion is corroded somewhat, especially on the posts where it mounts to the engine mounting plate. Here is a picture of it:
View attachment 219353
I have the version of the crank that has a ring in the center that fits into a machined groove in the middle of the crankcase.
I am at the point where I am ready to start rebuilding it but I will probably take it slow since this is a first for me. Other questions are:
1. How to grease up the crank seals (I have some marine grease that I bought)
2. How do I check to make sure that the crank is ok and do I need to grease the mysterious fitting in the center of the crank?
3. Is there anything special I need to know before reassembling this thing to the specifications in the manual?
More information from another post:
The ski was sitting for many many years with water and dirt in it (none in the motor) and had a seized pump. It also had scored cylinders. Once I got the exhaust, battery, engine, etc. out I couldn't see any of the hull. It was caked in dirt, mildew, oil and grime. I never thought it would clean up but with some highly concentrated ZEP degreaser it miraculously shined right up. The ski also came with a bunch of extra parts, some installed, some not, and most of them pretty rough condition-wise:
Coffman pipe
Westcoast exhaust manifold
PRO racing ride plate
A lot of rough looking carbs (five or six) including duals with a r&d dual intake
Jetinetics ignition
Pole spring
Bad bones waterbox
500gph bildge - not hooked up
Plastic trigger throttle
Rear exit exhaust
No choke - primer set up
Two extra engine bay covers
One extra stock handle pole setup
Extra junk engine - sat outside for years with the head and flywheel cover off
Spare head
Other small things including spare electronics
I also bought/had done:
one step up wiseco top end kit
bore and hone service to match the pistons I bought
a skat trak straight 16 impeller
a new/used jet pump assembly
new oil seals
crankcase block off plate
oil pump block off plate (oil pump shaft was already broken as far as I could tell)
Used driveshaft bearing and plate that is slightly better than the one I had
CD based manuals
I have a few more things to purchase and some work on the hull but basically I may be able to start putting this thing back together soon. I am worried about corrosion on the bottom of the crank case and two of the ride plate screws aren't threading. Any tips on that?
I still need to purchase:
wrist pin bearings
liquid gasket
torque wrench
electrical parts
spark plugs
battery
other items
Also the two engine mounting plates I have are pretty rusted. I grinded one down a bit and will probably just paint it and use it unless I find a nice one for a good price.
I also broke the stator mount in the disassembly process but I was able to salvage one from my junk motor and switch everything over.
I had trouble removing the drive coupler (and had to reassemble the engine to do it) so I bought a used one of those to replace the one I mangled.
Also it took me two different pullers to remove the first flywheel and for the second flywheel (on the junk motor) it took a puller, stronger bolts for the puller, a huge breaker bar, heat, and a mallet.
Here are some pictures of the ski:
http://imgur.com/a/WcZO2
This album has a picture of the crank case that I am worried about:
http://imgur.com/a/sGomD
Thanks for any input!
I was given a 1988 650sx by a friend and have been slowly disassembling and cleaning it for the past few months. I have never ridden a stand up and have no prior experience with them but I have tried to take it slowly and read up on everything as I go. I have also never rebuilt anything like this before.
Right now I am deciding whether or not to replace the lower portion of the crankcase, all of the crankcase, or just use what I have. The ski had been sitting with dirt, mold, and water in it for years and the bottom portion is corroded somewhat, especially on the posts where it mounts to the engine mounting plate. Here is a picture of it:
View attachment 219353
I have the version of the crank that has a ring in the center that fits into a machined groove in the middle of the crankcase.
I am at the point where I am ready to start rebuilding it but I will probably take it slow since this is a first for me. Other questions are:
1. How to grease up the crank seals (I have some marine grease that I bought)
2. How do I check to make sure that the crank is ok and do I need to grease the mysterious fitting in the center of the crank?
3. Is there anything special I need to know before reassembling this thing to the specifications in the manual?
More information from another post:
The ski was sitting for many many years with water and dirt in it (none in the motor) and had a seized pump. It also had scored cylinders. Once I got the exhaust, battery, engine, etc. out I couldn't see any of the hull. It was caked in dirt, mildew, oil and grime. I never thought it would clean up but with some highly concentrated ZEP degreaser it miraculously shined right up. The ski also came with a bunch of extra parts, some installed, some not, and most of them pretty rough condition-wise:
Coffman pipe
Westcoast exhaust manifold
PRO racing ride plate
A lot of rough looking carbs (five or six) including duals with a r&d dual intake
Jetinetics ignition
Pole spring
Bad bones waterbox
500gph bildge - not hooked up
Plastic trigger throttle
Rear exit exhaust
No choke - primer set up
Two extra engine bay covers
One extra stock handle pole setup
Extra junk engine - sat outside for years with the head and flywheel cover off
Spare head
Other small things including spare electronics
I also bought/had done:
one step up wiseco top end kit
bore and hone service to match the pistons I bought
a skat trak straight 16 impeller
a new/used jet pump assembly
new oil seals
crankcase block off plate
oil pump block off plate (oil pump shaft was already broken as far as I could tell)
Used driveshaft bearing and plate that is slightly better than the one I had
CD based manuals
I have a few more things to purchase and some work on the hull but basically I may be able to start putting this thing back together soon. I am worried about corrosion on the bottom of the crank case and two of the ride plate screws aren't threading. Any tips on that?
I still need to purchase:
wrist pin bearings
liquid gasket
torque wrench
electrical parts
spark plugs
battery
other items
Also the two engine mounting plates I have are pretty rusted. I grinded one down a bit and will probably just paint it and use it unless I find a nice one for a good price.
I also broke the stator mount in the disassembly process but I was able to salvage one from my junk motor and switch everything over.
I had trouble removing the drive coupler (and had to reassemble the engine to do it) so I bought a used one of those to replace the one I mangled.
Also it took me two different pullers to remove the first flywheel and for the second flywheel (on the junk motor) it took a puller, stronger bolts for the puller, a huge breaker bar, heat, and a mallet.
Here are some pictures of the ski:
http://imgur.com/a/WcZO2
This album has a picture of the crank case that I am worried about:
http://imgur.com/a/sGomD
Thanks for any input!
