76-77 Srx

[vmaxdad8657]

To the Yammie Gods,

I'm confused, I see some 1976 and 1977 Yamaha SRX-440's that have the long headlight tunnel, yet I've seen pictures of other SRX-440's that have the sleek hood with the heads of the liquid cooled 440 engine exposed.
Were there different models? Could the later one actually be a GPX that someone is trying to pass off as an SRX? This is one of the pictures that I'm talking about.

 

[Reimond]

These are some of kind "Kalamanzoo"? racers. Not original. Build for rasing. Please correct if i'm wrong.

 

[vmaxdad8657]

Here's another one, but they're saying it's a 75 GPX440

 

[YAMMIEGOD3:16]

SECOND PICTURE IS A LIQUID GPX MOTOR VERY RARE!!! THERE WERE I BELIEVE SIX SRX,s BUILT IN 1974. RACED AND THAN SRAPED BACK IN JAPAN. THEY WERE CALLED PANCAKE SRX. THERE WERE ALSO LIQUID GPX IN 1975 LIKE THIS ONE PICTURED BUILT IN VERY SMALL NUMBER AND LIKE I SAID ARE VERY RARE. KALAMAZOO DID ALSO RACE THESE CUSTOM BUILT GPX LOOKING RACE SLEDS LIKE THE ONE IN TOP PICTURE, BUT YAMAHA DID MAKE A PANCAKE SRX AND A LIQUID GPX MOTOR. 3:16 (yammie tony)

 

[dynofun]

Here's another one, but they're saying it's a 75 GPX440

There were other Kalamazoo hoods built for the SRX as well. What is the story behind this sled? Where is it? Who owns it? Is it a clone?

 

[vmaxdad8657]

They look like the Factory GPX's that Mike and Wayne Trapp once raced.

 

[vmaxdad8657]

Is this a 77 SRX440? or a 77 GPX440 LC

 

[yammiman]

....Mike and Wayne Trapp once raced.....

Wow - there is a couple of names from the past I haven't heard in a while!!!!

 

[YAMMIEGOD3:16]

TRAPPS ACTUALLY WON WHAT WAS CONSIDERD THE GREATEST SNOWMOBILE RACE OF ALL TIME IN 1971. THEY RAN A YAMAHA SR 433 AGAINST THE HUGE FACTORY TEAMS THAT INCLUDED RACING SKIDOO LEGEND YVON DUHAMMEL WHO WAS ON A FACTORY MOD 800 BLIZZARD. THAT WIN BY THE TRAPPS PUT YAMAHA ON THE RACE MAP FOREVER. !! 3:16 (yammie tony)

 

[Sanka]

Vmaxdad Thats a SRX with a GPX Liquid hood. I 'd say a 78 SRX with the hood

 

[YAMMIEGOD3:16]

Is this a 77 SRX440? or a 77 GPX440 LC

THAT SLED IS NEITHER. 3:16 (yammie tony)

 

[vmaxdad8657]

And they won the World Championship of Snowmobiling at Eagle River, Wisconsin, two years in a row!
And if memory serves me correctly, they came back again within a couple years, and won back to back championships again!

Mike Trapp, Wayne Trapp, Lynn Trapp

 

[vmaxdad8657]

The greatest yamaha's made

And we can all worship this RARE race sled.....
Would you sell your soul for one of these?

 

[vmaxdad8657]

Back to the SRX's, here are the two different hood styles that I was talking about:

 

[YAMMIEGOD3:16]

THATS THE PANCAKE. SIX BUILT. ONE OF THE SNOWMOBILE MAGAZINES JUST DID A STORIE ON THESE. 3:16 (yammie tony)

 

[YAMMIEGOD3:16]

CORRECT, ONE IN CENTER IS A YAMAHA 77 SRX. ONE IN FRONT IS A KALAMAZOO RACE HOOD. NOT YAMAHA HOOD. 3:16 (yammie tony)

 

[vmaxdad8657]

Trivia

The 4-bolt head is from what year Yamaha?

 

[vmaxdad8657]

More TRIVIA

And the 8 bolt head is from what year?

 

[vmaxdad8657]

go to: www.orps.ca/Fiberglass.html
They sell the 1976 SRX mod hood just like in the pictures!

 

[RJH]

The number 73 – from what I can see in the picture is a 1975 factory sled. Basically this is the same engine that was used in the first 433. In 75 a 340 and 440 was built.

The chassis was the exact same configuration as a GPX but the chassis alone was about ½ the weight. The engine port configuration was almost the same as GYT kit option but water- cooled. The single ring pistons were much lighter than GYT. The crank was GPX in both the 440 and 340. The ignition was a rotor from a TZ race bike.

The front skid bolt was vertically adjustable. The gas tank was hanging off the left side and low to better work with circle m’s. The skid was GPX – but again – half the weight. The pipes were the key to the sled – they were not GYT identical. You could put your finger thru them if you tried. The resonance (how they rang externally) was measured in the Yamaha piano factory.

The clutches were both Cat. The only major drawback was the track weight. So…we had the guy that used to build Manta’s in Michigan manufacture, for us, tracks from arboly bars (coated titanium) on a special Gates rag track installed backwards.

About the only thing that pissed me off was the circle-m injectors that we had to run. When they didn’t work (we went thru about 6 sets a year) we couldn’t do any better than top 3.

Vmaxdad – that might be a 75 from what I can see- but they extended the front bar to look like a 76 plus the saddles – (I bet they didn’t steer well with that).

This was my 340 back in the day - form Yamaha Canada