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Buell Forum » Old School Buell » S2 Thunderbolt » Archive through February 05, 2013 » 95 S2 need RPMs to MPH guide, speedo is wacko « Previous Next »

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Mtkawboy
Posted on Sunday, July 29, 2012 - 10:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Could some one give me some RPMs & gear for 35, 45,55,65 & 75 mph please. My speedo is reading way high showing 85 mph @3000 rpm when theres no way Im going that fast. I need some idea how many rpms = those mph before I get a ticket, For the lower speeds please tell me what gear your in too. Thanks for any help
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Cupcake_mike
Posted on Monday, July 30, 2012 - 01:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

do you have a gps or a smart phone with a gps app? probably be the easiest way to figure it out.
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Ratbuell
Posted on Monday, July 30, 2012 - 08:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My S2 is usually around 4k in 5th at 80.
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Buffalobolt
Posted on Monday, July 30, 2012 - 12:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

About the only way it could be off that much is if someone put the wrong speedometer drive assembly on the front wheel.

You might want to pull it and check the part number... Or just replace it with the stock one as they are pretty reasonably priced and easy to replace in a few minutes.
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Mtkawboy
Posted on Monday, July 30, 2012 - 12:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have a GPS but theres no place to plug it in. Ill check the speedo drive gear but in the mean time could someone help me out with the info I need for those speeds so I can ride the bike until I get it fixed. I cant take another ticket hit on my license
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Essmjay
Posted on Monday, July 30, 2012 - 05:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just use 2nd for 35. 3rd for 45. 4th for 55, and 5th for 65. and then just keep it under 3400rpm, you should be fine or close enough. 75 in 5th should be about 3800, 4000 for 80.
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Mtkawboy
Posted on Monday, July 30, 2012 - 08:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thank you, thats exactly what I needed
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Jon
Posted on Saturday, August 11, 2012 - 05:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Dude,

Order a new speedometer drive from American Sport Bike. I did. But I don't understand how you could be getting these results. Your drive has a hooked tang that inserts into a hole on your wheel and can only go as fast as the wheel rotates. The whole thing with shipping will be around 40 bucks and takes about 20 minutes to change.

You need to be able to see your speed accurately from your instruments and not have to do any factoring or extrapolating.
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Mtkawboy
Posted on Wednesday, August 15, 2012 - 09:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Will do, just got back from Bonneville today
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Jon
Posted on Saturday, August 18, 2012 - 03:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

How was Bonneville?
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Mtkawboy
Posted on Friday, August 24, 2012 - 12:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Fantastic until about 11 am every day, then it was like being inside a nuclear reactor. My Buddies that run Salt Cat 2 a turbo injected straight 8 buick powered lakester set 3 records all in the 220 range w/no broken parts. They are going back to the World of Speed meet in early Sept to try & set the XXO/blown streamliner record. Ive had enough salt & heat for the year
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