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Post by weverat on Nov 17, 2014 21:10:52 GMT -5
   This project has been in the works for awhile, started out building the free air 6 bolt, and later decided to go with a 71 chasis converted to a bubble. These are really nice light weight little sleds. It is a runner now, but needs test and tune. Carbs are still crazy rich, and the clutch is way off, but good enough for some break in time. I am hoping to get it sorted out and run it at Waseca, and Waconia this year. |
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Post by weverat on Nov 17, 2014 21:16:52 GMT -5
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Post by admin on Nov 18, 2014 19:47:29 GMT -5
That is really unique and cool. Must have taken a long time to build that one!
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Post by pararailer on Nov 19, 2014 2:00:26 GMT -5
Really cool. Interesting exhaust.
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Post by weverat on Nov 19, 2014 20:47:17 GMT -5
Test rode it last night, and it would not break 5500 rpm. The clutch is a new comet for a John deer, something I bought off e-bay or Craig's or something, and just bolted it on, with the thought of adjusting from there.
Tonight, as usual, always out of time and day light (no head light), I played with the clutch a bit. As purchased it has R weights, and a real super light spring.I gave it a heavy spring,now it engages @ 4700, and pulls like gang busters.
I was unable to get any more tach readings, as it was dark, and when the rpms came up, the gage lights blew out. I guess the used regulator I pulled out my collection was a bad one!
It will take a couple of good Saturdays to initially sort things out, then add studs, find some ice, and start the whole process over again. I guess racing is fun?
Stigerater, and Tomcat, where you guy's ben, I am gonna need some help at Clear Lake!
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Post by ddub on Nov 21, 2014 21:41:57 GMT -5
Cool sled,
I like it black!
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scorplover
L3 The Proven Snowmobile that never lets you down
Posts: 136
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Post by scorplover on Nov 22, 2014 13:17:43 GMT -5
Was it just a matter of rounding off the front. That's awesome!
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Post by weverat on Nov 23, 2014 8:28:54 GMT -5
   I am sure there are lots of guy's on here that have converted the 71 wedge hoods to bubbles, and there are probably some posts or even complete threads on the subject. If you cut the fin off to match the bubble chassis, you can mount the hinge and the hood fits right on. I am not sure if the handle bar bracing needs height adjustment or not ? I was committed to no hinge,and a total custom look. The entire fin was trimmed flush, and the bumper was slammed tight to the curved tunnel, and welded in place. Then we chopped 3" off the bottom front of the hood, causing the hood to tilt forward. The idea was to change the angle of the hood, exposing more of the engine. The other two pics are the dropped drive shaft, creating space for 1" picks. The way I do it you get to chop up the chaincase and the chassis ! |
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scorplover
L3 The Proven Snowmobile that never lets you down
Posts: 136
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Post by scorplover on Nov 23, 2014 10:12:59 GMT -5
That's nice work! Now I need to find a '71.
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Post by stinger440 on Nov 24, 2014 8:32:18 GMT -5
This sled is super cool!!! What are the pipes from? Did Aaen ever make pipes for a Cuyuna?
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Post by weverat on Nov 24, 2014 20:09:17 GMT -5
The pipes are from a swap meet, have no idea what they were built for, but they are kinda small, maybe meant for a little 440. Strangely enough the antique free air 4 bolt JLO 440 I found at Princeton came with the exact pipes. Of course we had to cut and weld to make them fit.
I am not sure what rpm they will work best at, it would be fun to use a dyno to help find the power range, and sweet spot.
The sled is a bit of a Guild-ed Lilly right now, but we fully intend to put it to work, my guess is we are not done cutting and welding !
We had green grass yesterday, snow today, maybe test and tune this week.
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Post by obj1 on Nov 25, 2014 12:48:36 GMT -5
Bring it over and we will "test" it?  |
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stingerater
L2 Scorpion - Above All
north central Iowa
Posts: 67
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Post by stingerater on Jan 7, 2015 14:00:06 GMT -5
Nice job! You really make stuff look nice and run good.
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Post by weverat on Jan 7, 2015 16:43:15 GMT -5
Thanks Tom,
This one is not there yet, carb is still rich, and the clutch is holding it to 7000rpm, which is ok for now, but I think the pipes want 8000.
I am a bit nervous about leaning it down, hate to have a problem, a guy just has too much time into these little motors to get in a hurry and burn it up. You know how it is,if it burns a piston, we have tear it all the way to clean it up! Pain in dee ass.
That is the problem with the rare motors, we hate to use them like we should! I'll bet you get nervous running them Honkers?
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brutanzatom
L1 Scorpion - The Great Snowmobile
Posts: 7
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Post by brutanzatom on Jan 7, 2015 18:55:15 GMT -5
wow that's sweet
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Post by bubbanoz on Jan 7, 2015 22:47:29 GMT -5
very nice. you do some awesome work! i love all the mods. careful gettin it going to fast cause that little brake aint guna do much.  |
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stingerater
L2 Scorpion - Above All
north central Iowa
Posts: 67
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Post by stingerater on Jan 8, 2015 10:55:13 GMT -5
Thanks Tom, That is the problem with the rare motors, we hate to use them like we should! I'll bet you get nervous running them Honkers? Sometimes a little nervous, but try to run them plenty fat in the jets and let them rip. It would be easier on my soul to fix a blown 793 than it is to leave it on the shelf or trailer. After running them, I have found they are pretty robust. Was more worried at first. |
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Post by kube1 on Jan 12, 2015 11:17:17 GMT -5
Weverat, that's pretty neat. I may try my own version of your free air beast. Looks like fun! Btw, Recoil says you should drop the trailer in Waconia for a little beverage.
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