Yamaha Rhino Forum banner

1 - 17 of 17 Posts

·
Registered
Joined
·
21 Posts
Discussion Starter #1
Thought I’d share some pics of what was left of this engine. Previous owner said he had only 10 hours on the build. I put everything back to stock.
 

Attachments

·
Super Lead Moderator
Joined
·
3,809 Posts
I like stock, unless you know some tricks for a rebuild, stock is reliable.
 
  • Like
Reactions: husky390

·
Registered
Joined
·
21 Posts
Discussion Starter #3 (Edited)
That’s what I’m shooting for as I want something reliable for me and my wife to enjoy since I have other dirt toys to go fast on. By the time I’m done with this thing it’s going to be an almost new machine.
 

·
Registered
Joined
·
423 Posts
Thought I’d share some pics of what was left of this engine. Previous owner said he had only 10 hours on the build. I put everything back to stock.

Well that's a pretty sad looking state of affairs. Is that a crack in the case next to the oil pump mounting? Looks like a total loss from here. I agree that given you have other toys you should keep this one pure stock. The Yami engineers seem to have what it takes to design reliable machines which is why I've used their products exclusively for over 50 years now. I am a mechanic by trade (well, previous life anyway..) but prefer not to spend my experience working on toys.


Of course, on second thought, just put a Rotax in it and keep all your toys competitive... :angel
 

·
Registered
Joined
·
21 Posts
Discussion Starter #5
Yup, cracked oil pump. We think, that the shop that put it together didn’t have it and the water pump timed right and forced the cases together thus cracking the pump and starving the engine of oil. Hard to say though, the previous owner said the wrist pin walking out of the piston happened to the 686 he had before and I know he was really hard on this thing.

All new parts are Yamaha except I upgraded the middle drive gear with a Weller since it has bigger tires. We’re just going to use it for Colorado Mountain pass roads since It’s too wide for the trails.




Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
21 Posts
Discussion Starter #6
One question I do have is, what is the clutch filter for? There was a UNI on it and it was so clogged with dust that I threw it away and bought a new one. Also, what is the fan on the other side supposed to do?




Sent from my iPhone using Tapatalk
 

·
Premium Member
Joined
·
3,143 Posts
Get rid of the filter u dont need it, fan i cant remember but leave it on


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
423 Posts
Yup, cracked oil pump. We think, that the shop that put it together didn’t have it and the water pump timed right and forced the cases together thus cracking the pump and starving the engine of oil. Hard to say though, the previous owner said the wrist pin walking out of the piston happened to the 686 he had before and I know he was really hard on this thing.

All new parts are Yamaha except I upgraded the middle drive gear with a Weller since it has bigger tires. We’re just going to use it for Colorado Mountain pass roads since It’s too wide for the trails.




Sent from my iPhone using Tapatalk

I saw the crack in the oil pump - but what about what appears to be a crack in the case close to the mounting base of the pump?
 

·
Super Lead Moderator
Joined
·
3,809 Posts
Love them Colorado passes :eek
 

Attachments

  • Like
Reactions: husky390

·
Registered
Joined
·
21 Posts
Discussion Starter #10
Yup, cracked oil pump. We think, that the shop that put it together didn’t have it and the water pump timed right and forced the cases together thus cracking the pump and starving the engine of oil. Hard to say though, the previous owner said the wrist pin walking out of the piston happened to the 686 he had before and I know he was really hard on this thing.

All new parts are Yamaha except I upgraded the middle drive gear with a Weller since it has bigger tires. We’re just going to use it for Colorado Mountain pass roads since It’s too wide for the trails.




Sent from my iPhone using Tapatalk

I saw the crack in the oil pump - but what about what appears to be a crack in the case close to the mounting base of the pump?


Must have been debris. No cracks in the cases were found.


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
21 Posts
Discussion Starter #11
It’s alive and finally out of my garage. I still need to break in the engine, dial in the carb, and install a water temp gauge that I’m waiting to ship. It has an HMF exhaust and I’m not thrilled about the decibels so I might look into something quieter. But, I’m glad it’s “done” and now to wait for the snow to melt so I can hit some mountain passes.




Sent from my iPhone using Tapatalk
 

·
Super Lead Moderator
Joined
·
3,809 Posts
One question I do have is, what is the clutch filter for? There was a UNI on it and it was so clogged with dust that I threw it away and bought a new one. Also, what is the fan on the other side supposed to do?




Sent from my iPhone using Tapatalk
They didn't come with the UNI filter, the fan on the passenger side has a 3" tube going to the header pipes to blow cool air on them.
 

·
Registered
Joined
·
21 Posts
Discussion Starter #13
One question I do have is, what is the clutch filter for? There was a UNI on it and it was so clogged with dust that I threw it away and bought a new one. Also, what is the fan on the other side supposed to do?









Sent from my iPhone using Tapatalk


They didn't come with the UNI filter, the fan on the passenger side has a 3" tube going to the header pipes to blow cool air on them.


Thanks, I ordered a new UNI and will keep it clean, unlike the previous owner.


Sent from my iPhone using Tapatalk
 

·
Super Lead Moderator
Joined
·
3,809 Posts
Love them Colorado passes :eek


What roof and windshield is that you have on your Rhino.


Sent from my iPhone using Tapatalk
The roof came off my son in-laws 09 700, the windshield is a stock full that I cut in half. I don't run a windshield anymore as it sucks in to much dust at over 20 MPH.
 

·
Registered
Joined
·
21 Posts
Discussion Starter #16
Love them Colorado passes :eek






What roof and windshield is that you have on your Rhino.





Sent from my iPhone using Tapatalk


The roof came off my son in-laws 09 700, the windshield is a stock full that I cut in half. I don't run a windshield anymore as it sucks in to much dust at over 20 MPH.


Thanks, I have a quarter windshield that came with it so I’ll try that first. I’ll probably get a Kolpin roof unless I can find an OEM locally.


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
21 Posts
Discussion Starter #17
So I finally had a chance to take this thing out for a spin and finish breaking in the engine. The suspension was fantastic, and never bottomed out. The front wheelbase is too wide so I get sprayed with mud from every puddle I hit so I’ll have to look into getting windows or something.

The only issue I had was it would backfire on decel in the mid to WOT range and never had a problem with idle to mid throttle range. We were at 10,000’ but I’m guessing I need to put a bigger main jet in it. Any other ideas?


Sent from my iPhone using Tapatalk
 
1 - 17 of 17 Posts
Top