76 Rupp Nitro 340 - Snowmobile Forum: Your #1 Snowmobile Forum

Kellan_723 · 11-07-2009, 12:23 AM

Just drug it home from the neighbors the other day and got her running. Has not run in at least 7 years. Definitely was more advanced than the competition from its day. Dual pipes, reed valve intake, Massive carbs, plastic gas tank, wide ski stance and many others. The cooling system for this sled is quiet interesting, It has a automobile style radiator and the coolant flows through the front bumper.

Dyno at 50 HP.
Needs some tuning but it runs like snot.
Anyone know of where a guy could get any manuals for it?

Thanks.

Will put up picks soon.

**smallengineguy** · 11-07-2009, 06:57 AM

That's cool as hell!!! I can ask a guy on another forum who has DOZENS od Rupps and see what he says. Those are $$$ sleds.

Kellan_723 · 11-07-2009, 12:17 PM

It even has CD ignition that automatically has high idle when you start it to warm up. May i ask which fourm this Rupp guy is from and his user name?

Invader440 · 11-07-2009, 02:50 PM

Quote:

Originally Posted by Kellan_723

It even has CD ignition that automatically has high idle when you start it to warm up. May i ask which fourm this Rupp guy is from and his user name?

Try here:RUPP SNOWMOBILE MESSAGE BOARD - Home

**smallengineguy** · 11-07-2009, 07:15 PM

That's the link I was going to give you. His name is pathfinder on most boards.

**smallengineguy** · 11-07-2009, 07:15 PM

Post some pics!

Polaris87 · 11-07-2009, 10:10 PM

I was talking to my landlords father and he had one of these sleds. Only he said his was a 440 Nitro. He said it was waaayyy ahead of all the other sleds in that day and age and it was nuts. How much money were these Rupps new compared to say a 440 TX, SRX, Blizzard ect..I thought the 340 TX's were fast at 80 MPH for a 1977. How crazy were these Rupp Nitros?

Kellan_723 · 11-08-2009, 01:05 AM

I believe that on a couple of brochures i saw on the net that they were around $2195 and $2295 brand new.

They are pigs on fuel though learned that today. Has two 38MM Mikuni on it with power jets I believe

VINTAGE SNOWMOBILE BROCHURES - ON THIS PAGE YOU WILL FIND OVER 400 VINTAGE SNOWMOBILE BROCHURES POSTED.
This site has lots of brochures and info

Kellan_723 · 11-08-2009, 01:17 AM

PP1827

PP1825

PP2977

These are pictures of the sled brand new.