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mugello
troop
Joined: 23 Jun 2008
Posts: 26
Location: Cambridge
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 Posted: Fri Aug 29, 2008 5:44 am Post subject: What size tyre |
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Hi I've seen posted on the site references to fitting a larger rear tyre to shift the point at which the rev limiter cuts in. This would presumably increase top speed. Being a fat b******d would this still work?? If so what size tyre would I need  . Iwould appreciate any feedback, Cheers Graham |
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Maver
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Joined: 14 May 2007
Posts: 2193
Location: naaaaaarfolk we drive tractors and talk loike PIRATES
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| Posted: Fri Aug 29, 2008 3:57 pm Post subject: |
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personally i run a pilot sport 140/70-12 on the back and it's fine 
have heard the schawble 140/70-12 has somehow got a larger rolling diameter and catches on the hugger wearing it away, allegedly.....
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mugello
troop
Joined: 23 Jun 2008
Posts: 26
Location: Cambridge
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| Posted: Fri Aug 29, 2008 4:14 pm Post subject: What size tyre |
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| Thanks Maver |
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Maver
Site Admin
Joined: 14 May 2007
Posts: 2193
Location: naaaaaarfolk we drive tractors and talk loike PIRATES
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| Posted: Fri Aug 29, 2008 4:43 pm Post subject: |
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no problem
i also swapped from a 120 to a 130 on the front, wouldn't recommend that as speedo does run a bit truer but lost "flick-a-bility" thru the bends big style 
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Blackpool Paul
Guvernor
Joined: 28 May 2007
Posts: 531
Location: Blackpool
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| Posted: Fri Aug 29, 2008 6:06 pm Post subject: |
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A bigger tyre on the back should increase the top end speed, but at the cost of acceleration? if the bikes main job is on motorways I could see the advantage, but personally being a bit on the large size I think my bike struggles enough as is. 
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Maver
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Location: naaaaaarfolk we drive tractors and talk loike PIRATES
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| Posted: Fri Aug 29, 2008 7:36 pm Post subject: |
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| Blackpool Paul wrote: | | A bigger tyre on the back should increase the top end speed, but at the cost of acceleration? if the bikes main job is on motorways I could see the advantage, but personally being a bit on the large size I think my bike struggles enough as is. |
agreed, the combination of "larger" rider and 140 rear tyre may not be the ideal solution, add into the equation NEW (therefore full size) 140 rear tyre AND NEW belt and i reckon performance would go down as the motor wouldn't be able to rev out fully........
my own personal solution is to fit a new belt and new 130 rear tyre at the same time, then when the tyre needs changing at about 3500 miles and the belt has worn a bit fit a 140 rear tyre and get the performance back, then 140's until the belt needs changing again and back to a 130
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