Post by wheels on Aug 6, 2011 21:38:14 GMT -6
Hi everyone.
I have a 1983 Yamaha Riva 180cc that needs some help. I will try and fill you in the best I can with what I have done so far.
First what happened is a larger guy was doing doughnuts with it (one leg on the ground kind) and it just some moving forward after that. So it sat for awhile.
After fixing the carb and getting the bike to run great it actually drove forward for a bit then it got hot (crank case cover was very hot) and it stopped moving again.
With the bike tire in the air the tire spins, the variant and the clutch does what it's suppose to do, goes in and out and belt up and down, and tire moves. But and pressure on tire, and I can even hold it with my hand, and it stops spinning
The whole time this happens the engine runs great never slugs down. It's just like the clutch is totally slipping.
What I did:
1: took the variant apart and looked at it. Plates are smooth no scratches lines wear anything, Smoothe.
2. The weights are nice and round no flat spots. Bearing and everything looks great.
3. The service manual said to grease the oil seal lip with Molybdenum grease (i used a valv marine grease) it also said to grease the roller weights, I did make the mistake and used the same heavy grease.
First question what grease should I use on the roller wights I have a spray Liquid Wrench white lithium grease or a spray silicone spray would these work?
4. I will put this back together, the variant looks great and does open and close easily and the belt goes up and down.
Clutch my big issue:
I have pictures but can't figure out how to post them, will after some lets me know how. I do have images on photobucket
I figured the friction plates (brake pads) would be very thin and under spec. The spec is new .12 in wear limit .106 in The three pales were .114, .114 .112 so they are still ok not new but fine.
The clutch plates look good no damage not warped.
The Clutch spring and Off Spring length is on the short end new is .84 in min is .79 in all of mine are .79 in.
Rollers are all fine, no flat spots.
Housing looks good no cracks edges look good.
I just don't see anything wrong in the clutch at all. No grease or oil on the pads. I will clean up everything with brake cleaner, not the pads ofcourse.
The large compression spring length free length is 3.62 limit is 3.35 in mine is 4.035 in not sure how it got bigger??
Question?? Is this an issue???
So I need help with some suggestions as to why the bike won't move forward with any pressure on it.
I did not change the belt I am going to get a new one Monday. The one I have is in spec and looks good, but I am not going to chance it.
Any ideas???
Thanks in advance.
I have pictures that I will post once I learn how.
Here is the clutch itself.
Here is the first rings taken off just prior to the first friction ring (Brake pad right?)
Closer picture of the friction plates
All the pieces out of the clutch
Here is the weights on the clutch
The main spring which is 4.035 in a 1/2 in bigger then it should be
Here is the Variant with the grease weights that I will clean up and just but on the white lithium grease.
I will be a pain for me to put this back together with the compression spring. Any ideas how I can do that without killing myself?
I have a 1983 Yamaha Riva 180cc that needs some help. I will try and fill you in the best I can with what I have done so far.
First what happened is a larger guy was doing doughnuts with it (one leg on the ground kind) and it just some moving forward after that. So it sat for awhile.
After fixing the carb and getting the bike to run great it actually drove forward for a bit then it got hot (crank case cover was very hot) and it stopped moving again.
With the bike tire in the air the tire spins, the variant and the clutch does what it's suppose to do, goes in and out and belt up and down, and tire moves. But and pressure on tire, and I can even hold it with my hand, and it stops spinning
The whole time this happens the engine runs great never slugs down. It's just like the clutch is totally slipping.
What I did:
1: took the variant apart and looked at it. Plates are smooth no scratches lines wear anything, Smoothe.
2. The weights are nice and round no flat spots. Bearing and everything looks great.
3. The service manual said to grease the oil seal lip with Molybdenum grease (i used a valv marine grease) it also said to grease the roller weights, I did make the mistake and used the same heavy grease.
First question what grease should I use on the roller wights I have a spray Liquid Wrench white lithium grease or a spray silicone spray would these work?
4. I will put this back together, the variant looks great and does open and close easily and the belt goes up and down.
Clutch my big issue:
I have pictures but can't figure out how to post them, will after some lets me know how. I do have images on photobucket
I figured the friction plates (brake pads) would be very thin and under spec. The spec is new .12 in wear limit .106 in The three pales were .114, .114 .112 so they are still ok not new but fine.
The clutch plates look good no damage not warped.
The Clutch spring and Off Spring length is on the short end new is .84 in min is .79 in all of mine are .79 in.
Rollers are all fine, no flat spots.
Housing looks good no cracks edges look good.
I just don't see anything wrong in the clutch at all. No grease or oil on the pads. I will clean up everything with brake cleaner, not the pads ofcourse.
The large compression spring length free length is 3.62 limit is 3.35 in mine is 4.035 in not sure how it got bigger??
Question?? Is this an issue???
So I need help with some suggestions as to why the bike won't move forward with any pressure on it.
I did not change the belt I am going to get a new one Monday. The one I have is in spec and looks good, but I am not going to chance it.
Any ideas???
Thanks in advance.
I have pictures that I will post once I learn how.
Here is the clutch itself.
Here is the first rings taken off just prior to the first friction ring (Brake pad right?)
Closer picture of the friction plates
All the pieces out of the clutch
Here is the weights on the clutch
The main spring which is 4.035 in a 1/2 in bigger then it should be
Here is the Variant with the grease weights that I will clean up and just but on the white lithium grease.
I will be a pain for me to put this back together with the compression spring. Any ideas how I can do that without killing myself?