I got my Yamaha grizzly 660 this past hunting season and have been pleased with the bike. Did everything I asked of it, but like I typically do when I buy anything used it was time for some maintenance.
I was only getting a top speed of 40mph and knew something wasn’t right. I was recently able to get into the CVT area to take a look at the primary/secondary sheaves. I found quite a bit of oil residue and even some fluff from the belt. The cage supporting the primary was even covered in grease, never seen this on any of the videos or pictures.
The grease in the primary was HARD and would not allow the sheave to completely open. I struggled a bit to just take the sheaves apart, hardened grease was preventing the cover and cam plate from coming off. From all the reading I did I realized I probably needed to change the oil seal on the wet clutch. If figured while I was in there might as well slug the wet clutch. I’m also going to change out the OEM sheave for one of JBS sheaves with OD weights.
Now, moving on to the secondary. All the original grease that was in the collar was gone. However, and here’s my QUESTION, there was grease in the inside of the secondary sheaves and on the backsides of the sheaves. I’ve cleaned up the sheaves in the pictures below, but you can still see a line on the faces. The bolts were basically covered in a thick grease/grime mix. Is there an oil seal in/around the secondary that needs to be replaced? As soon as I get this figured out I’m replacing the stock spring with an orange spring as recommended by JBS.
I got my Yamaha grizzly 660 this past hunting season and have been pleased with the bike. Did everything I asked of it, but like I typically do when I buy anything used it was time for some maintenance.
I was only getting a top speed of 40mph and knew something wasn’t right. I was recently able to get into the CVT area to take a look at the primary/secondary sheaves. I found quite a bit of oil residue and even some fluff from the belt. The cage supporting the primary was even covered in grease, never seen this on any of the videos or pictures.
The grease in the primary was HARD and would not allow the sheave to completely open. I struggled a bit to just take the sheaves apart, hardened grease was preventing the cover and cam plate from coming off. From all the reading I did I realized I probably needed to change the oil seal on the wet clutch. If figured while I was in there might as well slug the wet clutch. I’m also going to change out the OEM sheave for one of JBS sheaves with OD weights.
Now, moving on to the secondary. All the original grease that was in the collar was gone. However, and here’s my QUESTION, there was grease in the inside of the secondary sheaves and on the backsides of the sheaves. I’ve cleaned up the sheaves in the pictures below, but you can still see a line on the faces. The bolts were basically covered in a thick grease/grime mix. Is there an oil seal in/around the secondary that needs to be replaced? As soon as I get this figured out I’m replacing the stock spring with an orange spring as recommended by JBS.
