FZR400/600 Gearing

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fzrtim
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Bike owned: FZR400 FZRhybrid FZR600 RSV1k
Location: Beverley East Yorkshire
FZR400/600 Gearing

Post by fzrtim » Fri May 23, 2008 8:11 pm

Hi all. I have just fitted a 600 motor into my 3tj. I took it for its first shakedown at cadwell but the gearing is wrong as i wasn't getting up to 6th on park straight. I am running a 520 chain. I went up 1 tooth from the std 400 front sprocket.
Other than that and the clutch slipping the bike was sweet.
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oldgreg
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Re: FZR400/600 Gearing

Post by oldgreg » Fri May 23, 2008 10:10 pm

Hi, seen your thread in PB forum - lurvly bike!

Dunno if this helps - May be trying to teach grandma to suck eggs, but here goes....

http://www.yamaha-motor.hu/designcafe/e ... 94-FZR600R

This site shows the final drive ratio for a 94 600r as 3.13 where as a 3tj1 has a final drive ratio of 2.89....

If the sprockets on your 3tj were stock (19/55 apparently) you'd need to go down 2 teeth on the front and 2 on the rear to get the bike back to roughly stock 600 gearing. 3 teeth down on the front would be easier though right :lol:

http://shop.wemoto.com/info.dyn?title=S ... ear_Ratios

Dunno if that would be any good round a track though. Would it be better to go for an even higher ratio and loose some top end in exchange for pick up?


Cheers,
Graeme.
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Evilchicken0
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Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
Location: Lundin Taan
Re: FZR400/600 Gearing

Post by Evilchicken0 » Fri May 23, 2008 10:14 pm

Nice to see you at Cadwell.
Don't know about your gearing, but I guess you want to be a tad lower huh ???
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fzrtim
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Bike owned: FZR400 FZRhybrid FZR600 RSV1k
Location: Beverley East Yorkshire
Re: FZR400/600 Gearing

Post by fzrtim » Fri May 23, 2008 10:24 pm

Nice to see you too! Might try the 520 front recommended for the 400 and see how that fairs
http://img139.imageshack.us/img139/206/ ... 025mw5.jpg
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Evilchicken0
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Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
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Re: FZR400/600 Gearing

Post by Evilchicken0 » Fri May 23, 2008 10:34 pm

Depends what your plans are for the bike - if your going to race it then you want lightness. If your going to use it as a track bike then you have to temper it all with some economics and a 520 is probably the way to go.
Interestingly the new Hyabusa runs a 520 ... and when my Bimota needs a new chain and sprokets I'll use a 520 over the standard 535. Time and technology have moved on since the Bim was built
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torpytanktop
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Re: FZR400/600 Gearing

Post by torpytanktop » Sat Jun 14, 2008 3:28 pm

Hi, did you get a set up that worked for you?
I was at Cadwell on Thursday with my 400/600 and had the opposite problem - ran out of revs half way down the straight.....

My gearing is currently 15 / 45 by the way....
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