New to Rupps, So im looking for a little info.

XXXFIRE
Senior Member

Posts: 20

New to Rupps, So im looking for a little info. Nov 10, 2014 19:16:20 GMT -6

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Post by XXXFIRE on Nov 10, 2014 19:16:20 GMT -6

So this fall i started into vintage sled racing/collecting, I'v always liked Rupp's and loved hearing my dad talk about Rupp's back in the good days. So im kinda new to the Rupp world but far from new to snowmobiling. In my colection so far i have a 73 nitro 340 soon to be parted into a 72 chassis, 76 ? 340, and a 77 nitro 440.

You may ask "why a 73 ? 340" that will be my first question. It has all Rupp name stickers all over it, gauges, snow flap, hood,ect. Except the tunnel has brute on it Alouette bars, Alouette skis, Alouette striping on the hood. Was this a friday sled where they was like meahhhhh it will work ship it, The sled only has 600 miles so im kind of ruling out someone changing stuff after buying the sled.

So with my little story out of the way im looking for info on 102 clutch setups for the 77 nitro 440. My thoughts was a 41g notched weights with a cat yellow with green strip spring. This set up has worked well on other 440s iv built in the past with the same general physics of engine.

My other question is what is the best plug to run in them? i would like to stay NGK no champions (life long hatred of champions).

thanks for any info guys.

73 Nitro 340
76 Nitro/Brute 340
77 Nitro 440
81 jag 4000
81 el tigre
95 Racer only semi sno-pro 440 arctic cat
96 Ext 580 powder special
06 XFire 700 sno-pro improved mod hill climb/cross

lemans1955 Silver member Posts: 531	New to Rupps, So im looking for a little info. Nov 10, 2014 19:33:43 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by lemans1955 on Nov 10, 2014 19:33:43 GMT -6 Hey welcome to the site man! This is Kyle from the facebook page!
	1974 Nitro II 340 1973 Rupp Nitro 340 1973 Rupp American 40hp 1971 Moto-Ski Capri 399 x2 1971 Rupp Sprint 34 CCW Also owned: 2001 Ski Doo 500F Touring 1991 Polaris Indy 650 SOLD! 1979 Yamaha Excel V 540 1972 Arctic Cat Puma 340 Chassis SOLD! 1971 Evinrude Skeeter Wide Track SOLD!

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 10, 2014 19:49:49 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 10, 2014 19:49:49 GMT -6 The one that helped me find these ones?
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 10, 2014 19:59:06 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 10, 2014 19:59:06 GMT -6 pics
	Last Edit: Nov 10, 2014 20:03:03 GMT -6 by XXXFIRE 73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 10, 2014 20:07:49 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 10, 2014 20:07:49 GMT -6 more
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

lemans1955 Silver member Posts: 531	New to Rupps, So im looking for a little info. Nov 10, 2014 20:21:44 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by lemans1955 on Nov 10, 2014 20:21:44 GMT -6 Yup that's me, the guy selling those sleds advertised here, that's how I found em.
	1974 Nitro II 340 1973 Rupp Nitro 340 1973 Rupp American 40hp 1971 Moto-Ski Capri 399 x2 1971 Rupp Sprint 34 CCW Also owned: 2001 Ski Doo 500F Touring 1991 Polaris Indy 650 SOLD! 1979 Yamaha Excel V 540 1972 Arctic Cat Puma 340 Chassis SOLD! 1971 Evinrude Skeeter Wide Track SOLD!

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 10, 2014 21:08:31 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 10, 2014 21:08:31 GMT -6 i seen that, thats how i found them was you pointing me here
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

RevitupRUPP
Gold Member

Live it up RUPP!

Posts: 966

New to Rupps, So im looking for a little info. Nov 11, 2014 14:26:06 GMT -6 via Tapatalk XXXFIRE likes this

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Post by RevitupRUPP on Nov 11, 2014 14:26:06 GMT -6

Welcome to the board

1967 Ski Doo Chalet 250
1969 Massey Ferguson Ski Whiz 380
1971 Rupp Sprint 44
1973 Rupp Nitro 400
1973 Rupp Sport 25hp (project sled)
1976 Rupp Rally 440
1976 Rupp Nitro 340
1976 Rupp Nitro 440 (project sled)
1976 Rupp Nitro 440
1976 Rupp Magnum 440 (my future sled)
1977 Rupp Nitro 440 (project sled)
1977 Rupp Nitro 440
1980 SRX 440
1980 John Deere Liquifire 440
1981 Yamaha SRV 540 MOD
1981 El Tigre 6000 500cc L/C
1983 John Deere Sp

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 11, 2014 18:43:27 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 11, 2014 18:43:27 GMT -6 So do any of you guys have any info im looking for?
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

lemans1955
Silver member

Posts: 531

New to Rupps, So im looking for a little info. Nov 11, 2014 20:27:09 GMT -6 via mobile

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Post by lemans1955 on Nov 11, 2014 20:27:09 GMT -6

As far as your Allouette I believe it is a brute for sure, they were identical to the nitros except decal changes. As far as the gauges and snowflap I'm almost certain the snow flap was replaced at one point, and I the guages came that way from the factory. I could be wrong.

1974 Nitro II 340
1973 Rupp Nitro 340
1973 Rupp American 40hp
1971 Moto-Ski Capri 399 x2
1971 Rupp Sprint 34 CCW

Also owned:
2001 Ski Doo 500F Touring
1991 Polaris Indy 650 SOLD!
1979 Yamaha Excel V 540
1972 Arctic Cat Puma 340 Chassis SOLD!
1971 Evinrude Skeeter Wide Track SOLD!

XXXFIRE
Senior Member

Posts: 20

New to Rupps, So im looking for a little info. Nov 11, 2014 21:15:24 GMT -6 via mobile

Quote

Post by XXXFIRE on Nov 11, 2014 21:15:24 GMT -6

Why would the flap be replaced if theres no other signs of damage, or the rupp on the hood. Was there another sled that had stickers close to that? (Like just put different on it after the fact). There's not alot of info on De'vining the sled that iv found.

73 Nitro 340
76 Nitro/Brute 340
77 Nitro 440
81 jag 4000
81 el tigre
95 Racer only semi sno-pro 440 arctic cat
96 Ext 580 powder special
06 XFire 700 sno-pro improved mod hill climb/cross

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 11, 2014 21:16:41 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 11, 2014 21:16:41 GMT -6 I mean I see there's no different in the two really but its still a puzzle.
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

lemans1955 Silver member Posts: 531	New to Rupps, So im looking for a little info. Nov 12, 2014 12:21:01 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by lemans1955 on Nov 12, 2014 12:21:01 GMT -6 The decal on the hood was probably put on later as well. The hood decals other than that are all correct for an allouette.
	1974 Nitro II 340 1973 Rupp Nitro 340 1973 Rupp American 40hp 1971 Moto-Ski Capri 399 x2 1971 Rupp Sprint 34 CCW Also owned: 2001 Ski Doo 500F Touring 1991 Polaris Indy 650 SOLD! 1979 Yamaha Excel V 540 1972 Arctic Cat Puma 340 Chassis SOLD! 1971 Evinrude Skeeter Wide Track SOLD!

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 12, 2014 19:17:10 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 12, 2014 19:17:10 GMT -6 so any plug info?
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

lemans1955 Silver member Posts: 531	New to Rupps, So im looking for a little info. Nov 12, 2014 19:50:42 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by lemans1955 on Nov 12, 2014 19:50:42 GMT -6 I think I have a book that has em listed let me look.
	1974 Nitro II 340 1973 Rupp Nitro 340 1973 Rupp American 40hp 1971 Moto-Ski Capri 399 x2 1971 Rupp Sprint 34 CCW Also owned: 2001 Ski Doo 500F Touring 1991 Polaris Indy 650 SOLD! 1979 Yamaha Excel V 540 1972 Arctic Cat Puma 340 Chassis SOLD! 1971 Evinrude Skeeter Wide Track SOLD!

lemans1955 Silver member Posts: 531	New to Rupps, So im looking for a little info. Nov 12, 2014 20:20:29 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by lemans1955 on Nov 12, 2014 20:20:29 GMT -6 My book only goes up to 1975 all I have is fan cooled nitro plug specs, which call for a champion n19v.
	1974 Nitro II 340 1973 Rupp Nitro 340 1973 Rupp American 40hp 1971 Moto-Ski Capri 399 x2 1971 Rupp Sprint 34 CCW Also owned: 2001 Ski Doo 500F Touring 1991 Polaris Indy 650 SOLD! 1979 Yamaha Excel V 540 1972 Arctic Cat Puma 340 Chassis SOLD! 1971 Evinrude Skeeter Wide Track SOLD!

mrrupp1 Senior Member Posts: 298	New to Rupps, So im looking for a little info. Nov 13, 2014 11:40:53 GMT -6 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mrrupp1 on Nov 13, 2014 11:40:53 GMT -6 I use NGK BUE plugs they are a surface gap plug, which is what Rupp originally used in there liquid cools. I know alot of people have switch to a v plugs, but I don't know what. Clint

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 15, 2014 9:56:04 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 15, 2014 9:56:04 GMT -6 I wondered if I could run a electrode style plug. It has the NGK FLAT style in them now.
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross

lemans1955 Silver member Posts: 531	New to Rupps, So im looking for a little info. Nov 15, 2014 16:14:19 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by lemans1955 on Nov 15, 2014 16:14:19 GMT -6 I run electrode plugs in my other Rupps to check my mixture, once its set I switch back to surface gap. I'm sure u could run electrode plugs all the time.
	1974 Nitro II 340 1973 Rupp Nitro 340 1973 Rupp American 40hp 1971 Moto-Ski Capri 399 x2 1971 Rupp Sprint 34 CCW Also owned: 2001 Ski Doo 500F Touring 1991 Polaris Indy 650 SOLD! 1979 Yamaha Excel V 540 1972 Arctic Cat Puma 340 Chassis SOLD! 1971 Evinrude Skeeter Wide Track SOLD!

XXXFIRE Senior Member Posts: 20	New to Rupps, So im looking for a little info. Nov 16, 2014 9:33:34 GMT -6 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by XXXFIRE on Nov 16, 2014 9:33:34 GMT -6 With the compression being 12:1 theres no issues with the pistons high fiving the spark plugs?
	73 Nitro 340 76 Nitro/Brute 340 77 Nitro 440 81 jag 4000 81 el tigre 95 Racer only semi sno-pro 440 arctic cat 96 Ext 580 powder special 06 XFire 700 sno-pro improved mod hill climb/cross