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1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after. -
It is in the relationship of sprocket rotations to each other more then the chain , it can be only so long being a 530 or a 630 with a stock swing arm.81 gs 1100 E One owner,Me.Comment
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true, but it is the tooth ratio that directly specifies the ideal mechanical advantage and therefore is easily equated to the gear ratio. Generally this is the easiest parameter to understand as well as measure.
The rotation rates of counters sprocket and rear sprocket are inversely related to radius (relative to center of rotation) of the the linear chain motion relative to a common frame or reference (the bike). Rather than measuring the radiuses of the chain relative to the center, it is easier to count teeth.Last edited by posplayr; 06-05-2014, 06:57 PM.Comment
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So if I have a 40 rear, and I'm revving approx 4,650 rpm at an indicated 70 mph, can anyone figure out how many teeth are on my front sprocket?
One of the reasons I'm confused is that stock is 15/42, and that produces 3811 rpm at 60. I think I'm revving slightly higher than that, but my 40-tooth rear leads me to believe I should be revving less. Smaller rear, "geared up," revving lower, correct?
So my front must be very small, correct? How much smaller than 15 could it be?1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.Comment
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Can't you remove the cover & look?Comment
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Everything is getting replaced - two brand new sprockets and brand new chain at exactly the same time. Just trying to figure out if I want to change the gearing.
I'd like a less frantic engine speed on the highway, but I don't want to sacrifice any of that crazy 1100 acceleration we all love.
And I can easily see why too small in front is a no-no.1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.Comment
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You need a starting point or it's a crap shoot,pull the cover and count the teeth. Also it's well documented what would work to acheve what you are looking for, you need to know how many teeth are on the front sprocket. As Blowerbike said you do not want to be to small on the front.Last edited by yank; 06-05-2014, 09:58 PM.81 gs 1100 E One owner,Me.Comment
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I don't yet know what's on the front, but I don't like the idea of the front being different than stock, so I'll probably go with 15 and just use the back to adjust the gearing.1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red
2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.Comment
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Think about it this way: if you put an extended swingarm on your bike do you think the gearing changes simply because you need a longer chain? As for the chain pitch, the center distance between the rollers (the chain pitch) is designated by the chain number, in 1/8" increments. The "5" in 530 means the pitch will be 5/8". 630 chain has a pitch of 6/8"(=3/4").
Yep. It is really the pitch diameter ratio that matters, but the roller pitch has to be the same for both sprockets, so the tooth count is directly proportional to the pitch diameter and is far easier to measure.
Yes, the smaller the sprocket the faster the chain wears. If you go really small you can get to a point where the loads on the chain components increase significantly and the chain can break at a much lower load than in a straight tensile test. None of our sprockets ever get that small but it can be an issue in industrial applications.
MarkComment
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sorry sorry
18/50 is what i ment
18/50Comment
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