Help & FAQs    Search BCF    Members    Groups    Events Calendar
Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


125 2T - 25 bhp max - 13 - 38 ?

 Reply to topic
Bike Chat Forums Index -> General Bike Chat
View previous topic : View next topic  
Author Message

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 08:47 - 25 Jun 2012    Post subject: 125 2T - 25 bhp max - 13 - 38 ? Reply with quote
Will this ratio work -

Original 14 - 43
Mitos - 14 - 40

https://www.ebay.co.uk/itm/Cagiva-Raptor-125-03-11-New-steel-JT-front-sprocket-13-tooth-JTF711-13-/400259288251?pt=UK_Motorcycle_Parts&hash=item5d31500cbb

Have renthall 38 rear, and this is a cheap way to get what i need.

Karma Thumbs Up
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :
PostPosted: 09:31 - 25 Jun 2012    Post subject: Reply with quote
What do you want to achieve?
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 10:02 - 25 Jun 2012    Post subject: Reply with quote
More exceleration on the cheap, rear is newish, and chain still in good nik .....

Rather than having to pay 100 plus on new whole lot.

Put the 38 on rear but would prefer 39 - got the 38 for 20 quid, and fitted when doing other job so was easy .. Thumbs Up
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

lihp
World Chat Champion



Joined: 22 Sep 2010
Karma :
PostPosted: 10:06 - 25 Jun 2012    Post subject: Reply with quote
You will likely need to shorten the chain if you make sprocket smaller. So factor in a new link and tools.
 Back to top
View user's profile Send private message You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :
PostPosted: 10:12 - 25 Jun 2012    Post subject: Reply with quote
covdude wrote:
More exceleration on the cheap, rear is newish, and chain still in good nik .....

Rather than having to pay 100 plus on new whole lot.

Put the 38 on rear but would prefer 39 - got the 38 for 20 quid, and fitted when doing other job so was easy .. Thumbs Up


Well the ratio you would have with 13-38 would give you less acceleration than standard.

You want to lower the front and raise the rear. Every tooth you drop on the front is roughly equivalent to raising the rear by 3.
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 10:12 - 25 Jun 2012    Post subject: Reply with quote
PhilDawson8270 wrote:
You will likely need to shorten the chain if you make sprocket smaller. So factor in a new link and tools.


My mechanic will shorten it and fit it all for 20 - 30 max - aswell as do a couple of other checks i want him to. He's great. Thumbs Up
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :
PostPosted: 10:15 - 25 Jun 2012    Post subject: Reply with quote
It's simple

take the front and divide it by the rear.


13/38 = 0.342
14/43 = 0.325

That number is how much the rear sprocket turns with one turn of the front. The smaller that number the higher the acceleration.
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 10:20 - 25 Jun 2012    Post subject: Reply with quote
Will it be around the same change as going to 14 39 or 40 there abouts .. other wise its not worth doing ... your figure seems a bit too small to my lamen head. Thumbs Up
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :
PostPosted: 10:24 - 25 Jun 2012    Post subject: Reply with quote
covdude wrote:
Will it be around the same change as going to 14 39 or 40 there abouts .. other wise its not worth doing ... your figure seems a bit too small to my lamen head. Thumbs Up


That would be even worse (for acceleration).

14/40 =0.35

You want less than 14 on the front and/or more than 43 on the back.
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 10:30 - 25 Jun 2012    Post subject: Re: 125 2T - 25 bhp max - 13 - 38 ? Reply with quote
Original 14 - 43
Mitos - 14 - 40



Current is 14 - 38 ----
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :
PostPosted: 10:32 - 25 Jun 2012    Post subject: Reply with quote
Stock gearing 70mph at X Revs
13/38 73.5mph at X Revs
14/40 75.25mph at X Revs
13/43 64mph at X Revs
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 10:36 - 25 Jun 2012    Post subject: Reply with quote
I have on NOW 14 38 .... was gonna stick 13 on front, to get a bit more exceleration and a more usable 6th gear ? sorry if i,m being true to form and being a bit dim ... Confused Thumbs Up
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :
PostPosted: 10:52 - 25 Jun 2012    Post subject: Reply with quote
covdude wrote:
I have on NOW 14 38 .... was gonna stick 13 on front, to get a bit more exceleration and a more usable 6th gear ? sorry if i,m being true to form and being a bit dim ... Confused Thumbs Up


13/38 would give more acceleration than 14/38, but still less than standard.
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 10:58 - 25 Jun 2012    Post subject: Reply with quote
I in future will be getting 14 39 - maybe 40 --- and thought that 13 - 38 may be the same as 14 39/40 there or there abouts .. if i'm right i'll do it, but would be wrong to bother if i'm wrong.

Think i need kickstarts graph - again Rolling Eyes Karma
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

chris-red
Have you considered a TDM?



Joined: 21 Sep 2005
Karma :
PostPosted: 11:25 - 25 Jun 2012    Post subject: Reply with quote
13-38 is closest to 14-41
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.
 Back to top
View user's profile Send private message You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 11:28 - 25 Jun 2012    Post subject: Reply with quote
chris-red wrote:
13-38 is closest to 14-41


Well that will do and will also give me more idea on whether i want 39 - 40 - even 41 - long term ... Karma

Appreciate you patience and help big fella. Karma Thumbs Up
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

P.
Red Rocket



Joined: 14 Feb 2008
Karma :
PostPosted: 14:44 - 25 Jun 2012    Post subject: Reply with quote
You want a 13/62 Thumbs Up Laughing
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

WannaBeDude
World Chat Champion



Joined: 05 Jul 2011
Karma :
PostPosted: 16:00 - 25 Jun 2012    Post subject: Reply with quote
##Paddy## wrote:
You want a 13/62 Thumbs Up Laughing


I,ll ask chris to run it through his head calculator Idea Thumbs Up
____________________
Jogging on, destination living.
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts
Old Thread Alert!

The last post was made 13 years, 229 days ago. Instead of replying here, would creating a new thread be more useful?
  Display posts from previous:   
This page may contain affiliate links, which means we may earn a small commission if a visitor clicks through and makes a purchase. By clicking on an affiliate link, you accept that third-party cookies will be set.

Post new topic   Reply to topic    Bike Chat Forums Index -> General Bike Chat All times are GMT
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 
Debug Mode: ON - Server: birks (www) - Page Generation Time: 0.10 Sec - Server Load: 0.98 - MySQL Queries: 16 - Page Size: 99.82 Kb