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American Rocketman looks like a DC superhero. What blows my mind is they actually had a guy in costume for the cover photo.  Bike built by Mike Pierce, from various Indian models. He was the guy who took care of Steve McQueen's herd of Indian motorcycles.    https://www.motorcycleclassics.com/classic-american-motorcycles/sammy-pierce-p-61-american-rocket A pretty wild bike, the engine builder used shell and ball bearings on the connecting rods for redundancy.  
PeterCat fucked around with this message at 18:24 on Apr 13, 2021 |
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Apr 13, 2021 15:04
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Jazzzzz posted:"Love" and "Hate" on the hand guards is a nice touch, too Friendship ended with clutch. Stoppies are my new best friend.
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Apr 13, 2021 15:10
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Why does the primary stick out so goddamn far on these? There's transverse inline-4s that take up less space
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Apr 13, 2021 15:52
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Heritage?
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Apr 13, 2021 15:58
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Because they all have to use a big gently caress off wide rear end belt because ofSteakandchips posted:Heritage! It really makes no sense. A primary chain would be much narrower and keep the profile pulled close to the engine. That being said. It’s mounted on a big gently caress off wide rear end bagger, so maybe it doesn’t really matter in the end?
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Apr 13, 2021 16:49
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"Help me step-Suzuki, I'm stuck in the garage!"
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Apr 13, 2021 17:13
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They could also use an even smaller and more efficient gear drive if they'd switch to a unit-construction engine/transmission combo like every other manufacturer on the planet, but Steakandchips posted:Heritage!
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Apr 13, 2021 19:58
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Jim Silly-Balls posted:Because they all have to use a big gently caress off wide rear end belt because of Wrong, it's a chain. Sagebrush posted:They could also use an even smaller and more efficient gear drive if they'd switch to a unit-construction engine/transmission combo like every other manufacturer on the planet, but Wrong, they are unit construction it isn't a Harley. It is entirely for stylings' sake because that's what Harleys look like. Also wrong: anime in all it's forms.
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Apr 13, 2021 20:12
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Slavvy posted:Wrong, it's a chain. No, it's because that's what Indians looked like.
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Apr 13, 2021 20:32
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Slavvy posted:Wrong, they are unit construction it isn't a Harley. It is entirely for stylings' sake because that's what Harleys look like. Okay well I'm talking about the general theme of cruisers with separate transmissions and giant open belt drives waiting to suck up your pants, not that specific Indian.
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Apr 13, 2021 20:37
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How is belt final drive more likely to suck up your trousers than chain final drive?
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Apr 13, 2021 20:39
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This is the primary drive, between the engine crankshaft and the transmission, that we're talking about. Final drive is between the transmission and the rear wheel. Most Harley-Davidsons use a wide belt as a primary drive, where most other motorcycles use a narrower chain or geartrain. That's the thing inside the wide case on the bottom left side of the engine. It has become A Thing on choppers to remove the primary drive case and run with an open belt. That is definitely more likely to suck up the leg of your pants. 
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Apr 13, 2021 20:47
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Sagebrush posted:This is the primary drive, between the engine crankshaft and the transmission, that we're talking about. Final drive is between the transmission and the rear wheel. This is real dumb.
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Apr 13, 2021 20:54
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Sagebrush posted:This is the primary drive, between the engine crankshaft and the transmission, that we're talking about. Final drive is between the transmission and the rear wheel. Dude you are talking completely out your arse. Belt primaries are an aftermarket thing originally intended for drag racing that's been cargo culted by chopper idiots. Only Harleys have a separate gearbox, all modern other cruisers are unit construction except I guess enfields maybe. Every air cooled Harley has a chain final drive running in an oil bath, at least all the ones built since the 80's anyway.
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Apr 13, 2021 20:58
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Huh, well they're apparently such a common aftermarket part in America that I assumed a belt driven primary was standard. lol Still doesn't explain why it's so wiiiiiiiiiide even on the stock bikes though.
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Apr 13, 2021 21:01
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Is this like how all ducatis get an open clutch cover immediately when they leave the factory?
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Apr 13, 2021 21:06
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Coydog posted:Is this like how all ducatis get an open clutch cover immediately when they leave the factory? Exactly, it's one of the many ways Ducatis and Harleys are surprisingly similar. I think because they are philosophically identical, it's just the American conception of the ideal bike is a big chrome cruiser (this is in the process of changing) while the Italian conception is a sexy red sportbike.
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Apr 13, 2021 21:09
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Slavvy posted:Belt primaries are an aftermarket thing originally intended for drag racing that's been cargo culted by chopper idiots. I was going to ask about this. Surely since the invention of the chain, motorcycle manufacturers would have adopted it as a more compact alternative to a fatass belt for any part of the drivetrain - so why? You've answered my question, but is there a functional reason big belts were used for drag racing in the first place? Open clutch covers are rad as gently caress.
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Apr 13, 2021 21:17
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Sagebrush posted:This is the primary drive, between the engine crankshaft and the transmission, that we're talking about. Final drive is between the transmission and the rear wheel. While I know what final drive and primary drive are, it's good you cleared it up for others who may not know  I thought the discussion regarding sucking up your trousers was for the belt/chain in the actual final drive, i.e. the discussion had moved on from primary belts/chains as I didn't think anyone was talking about an open primary case with the belt/chain exposed because that would be dumb as gently caress! An exposed primary is dumb as gently caress! Steakandchips fucked around with this message at 21:42 on Apr 13, 2021 |
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Apr 13, 2021 21:40
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Open clutch covers seem like a bad idea to me just in terms of poo poo from the road coming in and getting everything dirty, but it must not be an issue because they're certainly popular and I think Ducati makes OEM ones
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Apr 13, 2021 22:33
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Mister Speaker posted:I was going to ask about this. Surely since the invention of the chain, motorcycle manufacturers would have adopted it as a more compact alternative to a fatass belt for any part of the drivetrain - so why? You've answered my question, but is there a functional reason big belts were used for drag racing in the first place? Belts are more efficient, and because you're frequently taking out either the gearbox or the engine, it makes sense to have something that doesn't involve any oil or gaskets or covers, just a simple quick release so you can quickly change ratios or what have you. This is also one of the reasons Harley retains separate gearboxes, once again it isn't because they're somehow too dumb to do it the normal way. MomJeans420 posted:Open clutch covers seem like a bad idea to me just in terms of poo poo from the road coming in and getting everything dirty, but it must not be an issue because they're certainly popular and I think Ducati makes OEM ones It is crap idea, that is exactly what happens and Ducati selling you a part doesn't mean that part is intended for the road regardless of what the marketing department wants to do.
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Apr 13, 2021 22:59
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MomJeans420 posted:Open clutch covers seem like a bad idea to me just in terms of poo poo from the road coming in and getting everything dirty, but it must not be an issue because they're certainly popular and I think Ducati makes OEM ones https://www.youtube.com/watch?v=_K50n5eCGQI
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Apr 13, 2021 23:02
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Open clutch covers on Ducatis are a thing it's really best not to think about, because the more you think about them, the less and less sense they make, and you start thinking, poo poo, open primaries and extended swingarms are downright logical compared to this.
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Apr 13, 2021 23:50
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I get using a dry clutch in motogp but I can't imagine the increased power would make any difference to your typical rider's lap times. Ari makes a good point about cooling, although I wonder what difference it really makes in the real world.
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Apr 13, 2021 23:53
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It sounds cool.
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Apr 14, 2021 00:58
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Toe Rag posted:It sounds cool. It sounds rattly and broken.
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Apr 14, 2021 01:00
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MomJeans420 posted:I get using a dry clutch in motogp but I can't imagine the increased power would make any difference to your typical rider's lap times. Ari makes a good point about cooling, although I wonder what difference it really makes in the real world. It makes the friction zone vary with temperature and humidity, it makes the clutch shudder and grab when you're trying to slip it, and it makes your bike sound like poo poo. The horsepower benefit is absolutely minute, GP bikes are chasing marginal gains so they run dry clutches because you only use it once per race so it can be very small, light and easily burned out. None of this applies on the road so the dry clutches on ducatis are actually bigger than a comparable wet clutch for the same engine because of the lack of oil cooling. It is the single most racing cargo cult  ultra-pointless thing about them, the desmo valves and timing belts and SSA's are all ordinary stuff by comparison.
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Apr 14, 2021 01:37
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Lol motorcycles are supposed to be fun guys dry clutches are fun
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Apr 14, 2021 01:40
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Loud clutches save lives
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Apr 14, 2021 01:43
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My experience owning a dry clutch Ducati is that it will make your left hand stupid and when you ride a regular wet clutch bike again you'll be lurching around like a noob because you forgot how to slip a clutch.
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Apr 14, 2021 01:44
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Finger Prince posted:My experience owning a dry clutch Ducati is that it will make your left hand stupid and when you ride a regular wet clutch bike again you'll be lurching around like a noob because you forgot how to slip a clutch. This may have been because of the other ailment all ducatis get, a failing slave cylinder that fucks out enough to make the clutch action lovely but not enough to strand you or show any signs of leakage.
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Apr 14, 2021 01:46
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If you imitate playing a tambourine while actuating the clutch at a light kids in the city really like that.
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Apr 14, 2021 01:50
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Spiffness posted:If you imitate playing a tambourine while actuating the clutch at a light kids in the city really like that. Did you learn that from an anime?
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Apr 14, 2021 04:38
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Jim Silly-Balls posted:Loud clutches save lives Spiffness posted:If you imitate playing a tambourine while actuating the clutch at a light kids in the city really like that.  this is incredible. In the two weeks I had my ducati I don't recall the clutch feeling weird or different than other bikes. Maybe all the years driving manual trained me to engage a clutch smoothly and with purpose and I just never noticed. Even with wet clutch bikes, I never really slip the clutch unless I'm off road. (maybe I do and don't notice it?) All the years of thinking a clutch is a fragile diamond encrusted thing to never slip has broken my brain. 
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Apr 14, 2021 14:49
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Spiffness posted:If you imitate playing a tambourine while actuating the clutch at a light kids in the city really like that.
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Apr 14, 2021 16:24
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Coydog posted:
the clutch is the control that requires finesse. the gear selector is just dumb counting. cars are designed backwards by having the clutch actuated by the foot, dumbest of extremities.
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Apr 14, 2021 17:39
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Apr 14, 2021 21:07
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Reminds me of a funny anecdote when I was on vacation with some friends in another city. None of them are automotively inclined in the slightest, but they know I ride. As we were walking down the street from the place we were staying at, a Ducati rides by us. After its gone, one of my friends leans over and says to me in a hushed tone, "Why does it sound like that?"
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Apr 14, 2021 22:57
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Behold, a motorcycle.  I have not actually heard of this bike before. It’s one of those late 80s/early 90s JDM 250cc 2 strokes, so I imagine it is  has anyone ridden one?
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Apr 15, 2021 02:28
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I have, they handle like garbage compared to the nsr and rgv, but they're also super powerful. So a typical kawasaki. They've got two crankshafts tandemed together, with rotary intake valves so the carbs stick out to the right, it's pretty cool.
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Apr 15, 2021 02:39
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