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Nov 13th 2017, 05:45 AM   #1
 galenernest's Avatar
 
  Jan 2016
  Beijing

  Honda CBF190R
Why remove the starter motor from a racer?

Why remove the starter motor? I'm assuming that the main reason is to shave a pound or two off the weight of a bike, but are there any other reasons?

I ask because I recently did a track day here in China, and most of the bikes I ran with didn't have a starter motor; they were all pretty much hacked up variations of the CB150. I ran my stock CBF190R.

I had the advantage in that I a) didn't crash and b) if I did crash, I wouldn't need to push my bike back to the pits to get it restarted. And for as slow as these riders were, they seemed to crash a lot...

My gut feeling is that they wanted their bikes to seem more like motoGP bikes... and I just think there are many other things that can be done to achieve lower lap times before removing the starter...

I have video... I may make a youtube thing later about track days in China if anyone is interested.
Nov 13th 2017, 05:56 AM   #2
 galenernest's Avatar
 
  Jan 2016
  Beijing

  Honda CBF190R
Haoting track day - PNW Moto

Trying to post the photo... click above to see the bikes I'm talking about
Nov 13th 2017, 07:58 AM   #3
 ChopperDr's Avatar
 
  Jan 2016
  Buckley

  BMW R1100S '98 HD FXD 08 CBR600RR-track
Not fuel injected? Drop the starter and the battery? Less weight goes faster!

Chop
Nov 13th 2017, 08:42 AM   #4
bcj
 bcj's Avatar
 
  Jan 2016
  teh rock

  K1200RS SV650
Doesn't the CB150 come with a kick start, or do they take that off too?
Seems small enough to not buy the extra electrical options for cheapness.
Nov 13th 2017, 09:11 AM   #5
 mgfchapin's Avatar
 
  Jan 2016
  Kirkland, WA

  '15 675R
Yeah, just weight. I've even toyed with the idea of removing the starter from my 675. It does present challenges if I were to stall at a start, or if I needed to turn the bike off waiting in hot pit for a crash to clear or something.

How did they start their bikes? Push-start or did they have a fancy GP-style start-cart?
Nov 13th 2017, 09:16 AM   #6
 Tripledij's Avatar
 
  Jan 2016
  Custer WA

  Aprilia Tuono 1100
Just take a dump before your race and enjoy electric start. Lots of mx bikes with electric start these days.
Nov 13th 2017, 10:46 AM   #7
 holypiston's Avatar
 
  Jan 2016
  Vancouver, WA

The only reason I could see is going back to the old GP style of push-starting from a standstill. That would be pretty cool.

Other than that....duh TWO STROKE!!!
Nov 13th 2017, 12:24 PM   #8
 MikeMikeMike's Avatar
 
  Feb 2016
  Seattle

Quote:
Originally Posted by Tripledij
Just take a dump before your race and enjoy electric start. Lots of mx bikes with electric start these days.
But you could take a dump and remove the starter/battery and be even lighter...

My track bike has a lithium ion battery that is just barely enough to get it started from cold, I'm also running a paired down stator/magnet set. Probably frees up 1-2hp and 5-6lbs. Still slower than everybody but by a little less.
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