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 New vibration
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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OP
Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
I know I no longer have an America but the Scrambler shares the 270° engine so I think this is still in the forums ballpark. I have a new vibration in my foot pegs ever since I've installed a new chain and sprocket kit. I haven't checked the carb sync since it was adjusted just weeks before the chain went on but it was really good then. When I ordered the regular steel sprockets were out of stock so they upgraded me to these: http://sprocketcenter.com/street-sprocke...bler-07-14.htmland I just wonder if the lightened 18 tooth front sprocket might not be dampening the vibration as much as the 19 tooth big lump that was on there before. I've checked the chain slack and it's right in the zone for the Scram. Any ideas? The EK X-ring chain is really nice and beefy and way smoother in operation than the worn stock chain.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: New vibration
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Joined: Feb 2007
Posts: 23,248 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,248 Likes: 64 |
How ya been Ed? Haven't talked with you in a while.Did the old front sprocket have the 2 piece with molded rubber design to dampen vibration and the new one solid?
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: New vibration
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
Joined: May 2010
Posts: 5,720 |
I thought I read the rubber on the OEM Fr. sprockets were to quiet down chain noise, I do suffer from sometimers, maybe I got that wrong. Sounds like an alignment issue or a tight link to me. Be interesting to find out the solution, when you figure it out..
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Re: New vibration
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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OP
Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
The old front sprocket was just a solid 19T where a former owner had replaced the 18T. No rubber surround like the factory unit.
Ryk, I used the same alignment method of laying a steel ruler across the face of the rear sprocket and lining up the chain to match, that's always worked well in the past. And, a tight kinked link was what had me swap out the chain to begin with.
The front sprocket is substantially lighter than the old one, I might try swapping back next week for a short ride just to see if that's it.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: New vibration
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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OP
Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
So after 160 miles the vibration doesn't feel as dramatic anymore but I have a new mystery (at least to me): improved fuel mileage. I was averaging around 45-47 before, the first fill up after the new chain and sprockets was 51 and last weekend's run of 151 continuous miles, without switching to reserve, returned an incredible 56 mpg. Whaaat?
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: New vibration
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Joined: Dec 2006
Posts: 7,028 Likes: 8
New Tires
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New Tires
Joined: Dec 2006
Posts: 7,028 Likes: 8 |
May just be the new chain break in. I thought this was going to be a Beach Boy tread. https://www.youtube.com/watch?v=Eab_beh07HU
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.
H. L. Mencken
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