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Author Topic: Gearing help. Building a 67" bike and need a starting point  (Read 317 times)

Offline blackdeath

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Gearing help. Building a 67" bike and need a starting point
« on: August 30, 2017, 09:03:56 PM »
I raced a 64" 1000 for a handful of years.  Now building a Gen2 busa instead.  I'm looking for a starting point with gearing for the bike I'm building.  Any help would be appreciated since I'd rather not buy 10 rear sprockets right off the bat.

I weigh 200 suited.
Bike specs:
For the time being the motor will stay stock.
Planned 67".  Minimum length 64" if I have local traction issues.
0.5" offset triple clamps.
05 1000 forks and wheels.
Cut frame rail.
Grudge style tank shell. 
And last but not least jri drag shock.
« Last Edit: August 31, 2017, 11:07:20 AM by blackdeath »
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Offline Red

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Re: Gearing help. Building a 67" bike and need a starting point
« Reply #1 on: August 31, 2017, 09:57:52 AM »

I raced a 64" 1000 for a handful of years . 

Now building a Gen 2 Hayabusa instead . 

I'm looking for a starting point with gearing for the bike I'm building . 

Any help would be appreciated since I'd rather not buy 10 rear sprockets right off the bat .

Bike specs:
For the time being the motor will stay stock .
Planned 67".  Minimum length 64" if I have local traction issues .
0.5" offset triple clamps .
05 1000 forks and wheels .
Cut frame rail .
Grudge style tank shell . 
And last but not least jri drag shock .


Under 200 horse power ~  you weigh 200 pounds ?

If you want to spray it later down the road .  .  .

Maybe 2 teeth bigger out back ?

Then let her eat !
« Last Edit: August 31, 2017, 11:16:37 AM by Red »
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Offline blackdeath

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Re: Gearing help. Building a 67" bike and need a starting point
« Reply #2 on: August 31, 2017, 11:08:17 AM »
200 suited.  I added my weight to the OP as well.

Long term it will be a bottle feed bike but for now I'm just trying to get something to run again.
« Last Edit: August 31, 2017, 11:10:25 AM by blackdeath »
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Offline BATTMAN

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Re: Gearing help. Building a 67" bike and need a starting point
« Reply #3 on: August 31, 2017, 03:44:13 PM »
16/44 and hold on

Offline blackdeath

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Re: Gearing help. Building a 67" bike and need a starting point
« Reply #4 on: September 01, 2017, 09:54:35 AM »
If I remember correctly 18 tooth is a factory front sprocket.  So if I buy a 16 and 17 tooth front.  And a 44 tooth rear I should be covered with a good starting point.  Sounds like a plan to me.
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Re: Gearing help. Building a 67" bike and need a starting point
« Reply #5 on: September 01, 2017, 11:46:45 PM »
17/46 I get the best et and mph. I am 6 over right now. 225lb unsuited stock motor gen 2. I have tried 47 & 48, but best et and mph is with the 46. Still not launching hard enough, that may change things later.