Racing History of the VMax 4 - tell it again.

Got the sled with no motor but chassis rule looks like #14 sled
Has behind clutch gas tank
But chassis is not painted
Still diggin to figure out
Jim kedinger from Yamaha used frequent me shop and remembered building
The sled
 
Welcome to the site, Yamadude0!:schild27::schild27::schild27:

There are a few of us around here, even when it's 100 degrees.:3devil-sm

You might try contacting the Yamaha Sled Talk blog. I believe the author helped develop the Vmax-4. He may have information for you, or know where to find it. At any rate, I'll bet he would be interested in hearing about the sled.
http://snowmobiles.yamahablogs.ca/

You can email your pictures to 8BU or me and we'll post them.
Code: 
mgrant1070@vmax4.com

Shark
 
Shark
 

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That is NOT yer average huckelberry!!!

Now there is another oddball vin to be added to the list.

WAY!!!!!!!!!!!!!!!!! COOOOLLLL!!!!!!!!!

More pics if ya can.

The legend gets deeper....

opsled
 
Cool pictures. Are the chromed pipes for the sled? To bad it doesn't have the 3 cylinder. Do you have the hood and panels from when it w raced?

Thank you for the VINs
 
Here you go.
 

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Another bit of history, of the Yamaha inline 4 twin crank 750, cases are designed to be narrow for bike frame vs snowmo frame, but as you can see the basic layout is the Vmax 4 powerplant in the making, funny the consumer version- (had to have a racing license to buy one) called the TZ750 was rated at 140hp similar to the 92 v4 hp rating, hears a pic of bottom end with top part of case off. and some sounds from a u tube videoTZ 750 carnkcase.jpg
http://www.youtube.com/watch?v=3aE-B4kL5rg
 
SRV540 said:
Well I would imagine the v4 originated from the TZ750 race bike.......man what a bike......Man what a sled!

TZ750-2a.jpg
Click to expand...
Unfortunately it didnt, and there are absolutely no common parts between the two engine designs. The VX engine displaced 743cc from a bore and stroke of 63mm by 59.6mm while the TZ 66.4mm bore and 54mm stroke. So completely different from the TZ race engine which by 1991 Yamaha would consider an out dated design. The VX engine owes a lot to the 350YPVS road bike and the bulk of the parts used would be similar to that engine
 

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noink said:
tz 750 ow31 and our sleds have a common history

team yamaha had King Kenny Roberts
he dominated most events with his bikes (unless he crashed or broke both rare)
then he tried a works bike for yamaha using this motor for dirt ovel flat track...
testing proved very good but racing tell all truths!
Roberts entered a couple of races qualified and again dominated the event!
tires for this class were not a problem, xr750 factory harleys easily finnished with a safe tire after a hard race.

roberts tire the hardest compound they could get to live the race came in on cords
he asked the AMA to bann the bike from future competition which they did as it was no contest citing it Never, hooked up on the track always spun and tire technology was not up to solving this problem and so yamaha withdrew from any other races claiming their interest in rider safety...when in fact roberts refused to ride anything with that style motor in a flat track bike!!!

yes it was banned
yes the bender got banned too
yes its yamaha on the EDGE again
Click to expand...
The VX750 Snowmobile engine has nothing in common with the TZ750 design, its was a completely new engine based upon much more modern thinking and with no interchangeable parts between the two designs
 
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