CBR 929RR 2000 - 2001 CBR 929RR Forum

Questions about gearing

Old May 4, 2006 | 03:03 PM
  #1  
erion929's Avatar
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Default Questions about gearing

i have a few questions about gearing my 2001 929 i was thinking about going 2 up in back and leaving the front stock please let me know what anyone has done or has found the best results

[IMG]local://upfiles/7152/ADAF789836EB44D6B800B2FCEDFAA4A4.jpg[/IMG]
 
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Old May 4, 2006 | 04:03 PM
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Default RE: Questions about gearing

I went 1 down in front (equal to 3 up in back). Easiest, fastest, and cheapest way to go. About $28.00 for a 15T front sprocket, nothing else to change. Swap it in and adjust the chain, thats it. Changing the back requires removal of the rear wheel, etc, and MAYBE a new chain (usually you can go 2 up in back and use the stock chain).

I did the front myself and adjusted the chain in about 15 minutes. The rear you have to go to a shop, which adds to the cost of the parts. A new rear sprocket is about $69.00 plus labor at a shop vs. just $28.00 for the front.
 
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Old May 4, 2006 | 04:40 PM
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Default RE: Questions about gearing

u didnt have 2 get a speedo healer or anything? i hear that it is way rougher on the engine to go 1 down in front b.c. it is about 1000rpms higher on all gears
 
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Old May 4, 2006 | 07:29 PM
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Default RE: Questions about gearing

As I said, -1 in front is the same as +3 in back. Its not 1000 rpms, its about 550 rpms. As far as it being harder on the engine, no. I didnt get a speedo healer yet, but I will eventually.

The difference in the speedometer due to going -1 in front is about 7.8%. For example, on my bike with the front sprocket change to 15 teeth, when the speedo says 65 mph, its actually going about 60 to 61 mph.

Going +2 in the rear would result in a 5.8% difference, where as going -1 in front gives you a 7.8% difference. Either way you are off a little, but a difference of about 1 mph between the two (and an rpm difference of about 150 rpms).

Actually the most popular conversion is -1 in front AND +2 in the rear (Equal to +5 in the rear). But I decided not to go too extreme, and just went -1 up front. The difference between -1 in front and +2 in back is too small to worry about.
 
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Old May 6, 2006 | 12:08 AM
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Default RE: Questions about gearing

i went -1/+2 with a 520 conversion and i really like it. i can still double any speed limit and the take off is quicker. there is a little more vibration from the higher rpm's but that's not really a big deal. i originally went with a -1 in the front with the stock 530 chain and it made quite a bit of difference. the only reason i went with the +2 in the back is because i decided to change my chain and went to the smaller 520 size so i had to buy a different rear sprocket anyway. and a speedohealer is a must (my opinion, of course) with any gearing change. i want my speedo accurate for the legallity and the knowledge that i am performing the proper maintenence at the correct milage.
 
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Old May 6, 2006 | 01:47 AM
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I also went =1 in the front +2 in the back with a new chain and sprockets since it needed it went with a 520 as well and in the higher speeds the speedo was off as much as 18.5% as per GPS so I got the speedo healer from Calsportbikes as well as one for my buddy,great to do business with and now i don't worry about Jonnie Law at the end of the month during quota time
 
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