Our first SNOCRUISE  YAMAHA
 700 TRIPLE VMAX
"Silver"

SNOCRUISE
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The
Lone Ranger's
FAMOUS HORSE
HI-HO
SILVER
Oct-Dec 1953

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Our First YAMAHA 700 Triple "Silver"

 V-Max Turns into a 2012 Project Sled...
...
Was I fussy...maybe, but had I not investigated that little "TICK"!!!!

  •  Add a more powerful sled to our fleet.

  •  Pick a sled that I had some first had experience with thru tuning on a buddies ride.  

  •  End up with a well equipped sled that has more power and track than our fleet of 500's.ND UP WITH A WELL EQUIPPED SLED THAT HAS  MORE POWER AND TRACK THAN OUR FLEET OF 500'S

  • But end up with a sled still light enough to throw around in the powder, that is responsive handling .

  •  WE DID NOT EXPECT THIS SNOWMOBILE TO BE A "PROJECT"....BUT DID YOU HEAR ME SAY EVERY SNOWMOBILE IS A PROJECT, ONE WAY OR ANOTHER BY CHOICE OR BY CHANCE.

This 700 triple is estimated to have 115 HP. The. track is a 121 X 1.5". Reliability and consistency was some of the earliest considerations. Sure we could of seek out a 700 model that definitely has more power, BUT... but, is a big word. To put it in a nutshell we do not want a model with a limited lifetime. Where at xxx number of miles she is kaput, broken, wore out, "done like dinner", surely you would have to know where I am going here. Snowmobiles to some degree are largely disposable. For an example you do not buy a snowmobile and plan to put 100,000 miles or KM's on it, then hand it down to your neibour or son to roll the odometer over a second time. This is not going to happen, on the other extreme end of the scenario we could compare the snowmobile to a Baja cross country desert racer. A racer with "long travel" suspension works hard in a tough cross country environment and range of temperatures separating day from night. Where the rubber meets the road they require constant maintenance not only in between races but also during the race in between fuel stops. This reminds me exactly why I walked away from the sport in the 70's. It was repair for 2 hours then ride for 1 hour! OMG, you know it is a certain breed of enthusiasts that have evolved and survived this sport! Even the most reliable snowmobiles require that look over and constant checking for signs that one component or another is wearing, prematurely, unevenly, defectively, environmentally, or the worst kind of problem...by your own hand. Small details that are engineered in that you simply are not aware of. You have to remember the snowmobile is  mostly derived in the  agricultural industry from left over agricultural parts. Shape a sheet of metal or two, punch some holes in it from side to side, mount an engine, weld up some tubing for steering...kinda sounding like a combine huh? 

 

You know what I mean! Then combine that with a ridged chassis that is strong doesn't shake apart or come unglued evertime you experience a hard hit in the back country.

 

 SOMETHING WE DIDN'T EXPECT

Exceptional reliability in this case because the engine is a triple. Properly designed, or rather designed to be in for the long run a triple has smaller more evenly spaced pulsations when each cylinder fires. This results in less wear and tear in the clutch, and for that matter to some degree every component down the line until you get to the track! in the form xe story...rarely is economy discussed, expect bragging rights at every fuel stop!
 - Economy...we rarely discuss fuel mileage at SNOCRUISE in the Saskatchewan prairies because we ride such large variety of cross-country snow conditions. We are more concerned with the relative location of Small towns with fuel service in our riding area. But under archives we tabulate fuel usage for fun at most stops. Look for an "F" added to the title that we use to numerically identify the rides, "Link" on our "Archives page. Fuel mileage is usually best gauged on consistent "groomed trail riding" conditions.
-
 12-05.6  OUCH the carbide catches crossing the rail way tracks and stops here dead in her tracks!

 

"Motorhead" STUFF  

1. THE CARBURETORS ARE JETTED WITH A MODEST VERSION OF BUDDIES 'OL 700 XT.
 2. WE OWNED AND OPERATED THE SLED FOR A COUPLE YEARS, AND IT WAS ONCE WE PURCHASED AND FIRED UP OUR SECOND 700 TRIPLE...TO BE OUR SR 7 CROSS COUNTRY MODEL DID A SMALL NOSE STAND OUT ON "SILVER"!!
 I ADDED A FEW ITEMS THAT HAVE BEEN A STANDARD FOR SNOCRUISE SLEDS.

 3. A NUMBER OF SMALL USER FRIENDLY ITEMS WERE ADDED!
 

 

 1. THE CARBURETORS WERE JETTED SAFELY 1/2 WAY TO Buddies SET UP From  A  Few YEARS  Earlier  
The snowmobile ran fine from the day I bought it. It had been a US import and came with a small case full of jets for tuning. This is an immaculate well cared for snowmobile that came with a good selection of jets. Non of which were lean enough for our proven set up. 

We Jet our new-to-us sled.



The


The

2. I thought that it seemed to have a slight tick at idle, but this was not noticeable any other time. We rode the sled some 1400 miles/2258KMs  before hearing the SR7 run and decided to have a close look.
Evidently the engine suffered a cold start or maybe bad fuel and severe short term predetonation which expanded this middle slug just enough to scuff it test book style, on 4 corners. It is just a matter of time!! Luckily we had a good look. Compression was perfect if you could believe that, finally I dropped the exhaust manifold and Walla!!
c) We ride this sled for a couple years until the fire up of our 2nd 700 Triple, and the quiet manor suddenly seemed more natural. Hmmmm....
d) Ok, like King Henry the VIII  would of said "Off with her head!"

The best we could tell with a wire light thru the sparkplug hole it had no damage on the crown or ring land area whatsoever,

 P.T.O. side
"Off with her head!"

Hmmm...W.T.H. is this!!!
|The extent of the damage was soon fully revealed.

 MAG  side
This revelation was both a big surprise and a relief.
 TICK "found"!

The #2 piston was in real bad shape.  but the piston skirts were both gauled and the piston's aluminum had clearly been sticking.

 Ouch the exhaust side!

 Ouch the exhaust side!  This is the damage visible thru the #2 cylinder exhaust port once the exhaust manifold was removed. Actually a pretty relieving find.

The piston is not scored all the way around like the engine was overheating IE: running out coolant. Or running with no snow thrown up at the heat exchangers.
 The intake side.

 But the patchy black hi friction areas are predominately at "4" corners. The galling down the center may be just the simple result of running the engine as long as we did unknowingly...

...with pre existing cold seizer or instantaneous detonation damage. Thinking "in print" I will look at the length of the 3 individual fuel line's length.
 WOW am I ever happy we put together our SR7 and I notice that it was silent in comparison. 
 Intake side  Exhaust side

 light scoring


 honed out


 even the worst side


 ends up looking pretty good


Call it lucky catch if you like, but the "TICK" was hardly noticeable but is just the kind if thing that a lot of other people would hope would just get better on its own. WOW wishful thinking.

The following is a couple snaps from sleds I bought after this, and repaired as projects.

 


 600 SX DX

 700 Blue Max 


The new coated slug, very similar to OEM.

The


The jug is back on.


The head gaskets are high tacked.


The torque sequence is important.


The head is reinstalled.

 A) TRACK skid plate UPGRADE  


A necessary bulkhead protecting skid plate. No brainer math required on that one.

b) CHAIN CASE UPGRADE


We add reverse.


An otherwise spotless chaincase gets retroed a reverse kit I have salvaged.

c) HANDLE BAR RISER & HOOKS


The STD fitting snocruise handle bar riser addition and handle bar hooks. A couple
items you do not need until you have to ride with out them. CASE CLOSED!

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