That's awesome. Great idea. I see a movie trilogy coming. "Hells Angels on Ice: The forgotten years". "Hells Angels on Ice: Fighting Mounties and Frostbite" "Hells Angels on Ice: Sonny Bager, The Toeless Leader"
From an engineering/fabrication standpoint it's great. That being said, hearing the roar of a 45 degree v twin out of a vintage sled is somehow sacreligious.
Damn that’s so sweet. I was like man that thing is going like 85mph all day. 88mph!! With that set up is pretty sweet. No chain drive all clutch. That’s impressive.
Bob Rynda, you did some really nice work here. I have a '73 Harley Davidson sled that I would like to do the same thing to. I realize that it is a mid-mount engine chassis but I already have the solution to that drawn up. I know you previously stated that do to liability reasons you would prefer to keep your drive engineering private but I think you should patent it! I would be willing to pay for and sign a waiver to have you make up another or furnish some drawings and a parts list. Hope this makes it to you.
Did a nice job on it. I like it. With all the work you put into it I would rather you used a original Harley-Davidson sled. Even with the mid engine mount you could put a front mount bulkhead with IFS. But that's just my opinion. Still a very nice piece of craftsmanship. Two thumbs up!
ironcast no way in hell a 45 degree (tractor/harley) motor sounds better than a small bore 70's 2 stroke twin. Search rotax type 354 and open the guy doing asphalt runs. Now that is the sweetest sounding snowmobile motor of all time (even if it's transplanted into a junk polaris tx chassis).
HA!! Too Cool!! Frikken Love this!! I've thought about doing the same with a Sporty engine, simply because they so readily available, and so damn reliable. (and cheap too!)
Hans Schtuk citation ? You've gotta be talking about a citation ss. (Ss being the 368 with twin carbs). The plain ol 4500's were only good for 65 or so.
In Harley's defense, the old HDs had a chain oiler that dripped a small amount of engine oil to lube the chain. That's where that leaking thing came from. Most of the newer ones aren't really that bad for leaking oil.
If you bolted on an 80” evo with the same carb, se57 cam adjustable pushrods and valve springs and cycle shack slip-ons 1/2 the price and twice the torque, 20 more horsepower, w/stock compression, up to 40 with 10.5:1 JE pistons (factory recesses for high lift cam valve clearance) may have to use a milling machine and end mill to trim the case to clear the cam lobes. Or make a FATVO BLOCKHEAD 88” TC heads on an 80” evo lower, i think it adds up to 99/100” ? Don’t recall. Looks sweet, Id like to see it at its potential though!
You must have figured out the Gearing .. Because HD's don't rev very high .. My 4 Stroke Yamaha turns 10,250 RPM .. it has a 20% reduction gear to the clutch .. At 998 CC's it makes about 160 HP and runs 116 MPH on GPS..
Thanks for your interest. Building the primary drive was a project in itself. The jackshaft has two Timken bearings similar to the crankshaft bearings running in oil. The jackshaft housing is supported by the engine side plate and another housing mounted to the rear of the engine. Most every part on the primary drive including the starter drive is custom made. I have drawings for all these parts although I'm reluctant to share them for labiality reasons.
Harley Davidson actually marketed a snowmoblile. I cant remember the year but it was a pretty thing with chrome skis. Wasn't one bit of good and leaked oil like a sieve. Didnt last long.
Yes the Idea is Excellent. Except it looks like an extremely HIGH CENTER of Gravity, Look like the engine could be mounted down inside and the 3" Belt could bring it up to the Clutches. A Standard Harley 3, 4, 5 or 6 Speed Transmission Would be interesting. Curious, How fast in the Snowmobile Land Speed Record? A Harley Transmission with the CV Clutches also. ....??? No? EeY?
Most of the weight of a HD engine is in the steel crankshaft, flywheels, connecting rods, cams and cam gears, all in the bottom end. With the increased weight the center of of gravity is much lower than with the stock engine
I apologize, I'm really not a big Harley Davidson fan nor a snowmobile fan, nothing against sleds except the temperature they were designed to operate in! LMAO! I have a Ezgo golf cart on steroids I'm building again switching from a sled 2 stroke that's in it now to a fully custom built Briggs and Stratton 35CI vanguard V twin inter-cooled and turbocharged the right way. For you metric guys out there it's a 570cc engine. I've got bored with the 488 inline twin Polaris I currently have in the thing with a set of 6:1 rear end gears and a fully custom Comet CVT system, believe me it's a absolute animal and the question everyone always asks me is exactly what you said in the video "how fast does it go?" My response is always the same deal, much faster than you ever want to go on something so high off the ground, and it's basically a couple inches higher than stock just for ground clearance of course. BUT anyways getting back to how fast.....! With the leaf spring suspension and short wheelbase even with wider wheels plus billet 2.5" wheel spacers on every wheel to help with the stability issues, it's much faster than anyone would want to try and attempt, cuz the ending isn't going to be very pretty!!! Lol! 35mph it becomes a bit of a handful, @ 45 your White knuckling the wheel and beginning to reach out to a God @ 50 you begin to feel like its starting to float on a pillow of air underneath your ass instead of wheels! Even with rack&pinion steering it doesn't matter! They were just not intended for stupid speeds and with a 2 stroke which only begins to come alive at around 5K your already approaching that white knuckle speed! And that's why I'm not happy. I would prefer lower down torque curves which continues to pull all the way through the rpm range rather than having to be on the pipe as its called, to be in the 2 stroked power band. So on top of all that, I haven't personally seen a Briggs on RU-vid turbocharged in the proper manner. It's more of like slap it on and lots of hoping for the best using a completely stock internals engine and a bunch of parts never intended to ever work together! BUT very awesome to see someone different for once! It's definitely unique that's for sure Lol! Well I truly wish you the best of luck with it! She looks mint and sounds healthy, let alone, she fuckin rips!!! 😄👍
