Author Topic: modification of bs100sp gears to reduce the gap between 2nd and 3rd  (Read 1005 times)

0 Members and 1 Guest are viewing this topic.

Offline Chasmac

  • Trade Count: (0)
  • New Member
  • *
  • Posts: 2
  i am sure i have seen a bulliten or written litrature about a way to change gears in box to close up the gap ,i am raceing a bs100sp and find im loosing momentum when changing down to 2nd for a corner and then back to 3rd gap to big .any ideas anyone ??????

Offline OldSwartout

  • Global Moderator
  • Trade Count: (0)
  • *******
  • Posts: 1314
Re: modification of bs100sp gears to reduce the gap between 2nd and 3rd
« Reply #1 on: August 07, 2024, 11:10:46 AM »
Other than having 2 new gears machined, not much in the way of mechanical changes that I can think of.  I checked, even if the 50-60cc gears fit, the gap between 2nd and 3rd is the same. Even the 175 gears are only 3% different in ratio step from what you have. 

My suggestion: If possible, try lengthening your expansion chamber enough to get more torque in the RPM range you need it. That may be more beneficial than having power at the high end of your RPM range.  That may depend on the track you're running.
Karl Swartout
Mooresville, IN
BS175 Roadracer. BS200RS, BS350 GTR

Offline Chasmac

  • Trade Count: (0)
  • New Member
  • *
  • Posts: 2
Re: modification of bs100sp gears to reduce the gap between 2nd and 3rd
« Reply #2 on: August 10, 2024, 04:16:18 AM »
thanks ill try anything,these 2 strokes are battle but lot of fun

 


Gallery


Views:1152
Comments (0)
By: hod928

Views:1197
Comments (0)
By: hod928

Views:1198
Comments (0)
By: hod928

Views:1463
Comments (0)
By: hod928

Classifieds

Deleted

Price: $0.00
Date: 08/09/2024 07:09 am
Time Left:
BS 175 DT Carburettors Mikuni VM 17 s

Price: 120.00 EUR
Date: 04/14/2024 09:55 am
Time Left:
BS175 DT 1966 Gas Tank

Price: 150.00 EUR
Date: 04/14/2024 09:37 am
Time Left:
Gto
Date: 03/02/2024 06:49 am
Time Left:

Recent Downloads added

Parts Manual BS-7 Std & Deluxe with new style part numbers
Rating: (None)
Filesize: 5483.15KB
Date: April 17, 2024, 10:15:22 AM
Chibi, Chibi Deluxe, Tora Service Manual
Rating: (None)
Filesize: 20383.27KB
Date: May 01, 2023, 08:35:39 PM
Chibi_Tora_Parts_Manual
Rating: (None)
Filesize: 14301.44KB
Date: May 01, 2023, 08:25:53 PM
BS200 Mk II RS & MK II SS Exclusive Parts
Rating: (None)
Filesize: 358.29KB
Date: March 07, 2021, 07:30:10 PM

Powered by EzPortal