Question about 1984 Yamaha FJ 1100

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I need to know is smaller sprocket rear for fj1100cc

I need to know is smaller sprocket rear for fj 100cc better low rev? and tell me how many tooths sprocket ? two or three lesstooth ?

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Rpm will drop lower if smaller sprocket is fitted to rear.

E.G Top gear 100kmh/ rpm= 3000 Drop 2 teeth on rear sprocket

Top gear 100kmh/ rpm= 2500

Posted on Nov 14, 2014

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Smaller sprockets will only give you about 500 less RPM.

Posted on May 03, 2010


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My bike has been to the shop twice 4 the same problem and its still there i have no power at low revs even in first gear to the point it stalls . but at high revs the bike goes hard can u help?

apart from the obvious check air filter is clean spark plug is good and your pilot jet in carb is all clear form dirt or gummed fuel my next step would be put a tooth or two bigger rear sprocket on it to lower the gear ratio this will give more torque low speed maybe whilst you looking at the sprocket just check that some has not change the front to smaller sprocket it being few years old some one may have set to get more top end speed and sacrificed all the low end??

May 22, 2011 | 2004 kawasaki KX 250 F

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Can you change tranny gears to decrease rpm's on highway? Or maybe change sprockets.

You can add teeth to the front sprocket or take teeth off of the rear sprocket. In the case of your bike , I do not think there is a 17 tooth front available so your best option would be to shorten your chain and drop from the 44 tooth rear sprocket to 40 tooth or a 36 tooth rear sprocket. That would be like adding one or two teeth to the front sprocket. Your stock is 16/44 so decrease from there. Be sure to ID your chain, get a chain breaker, and a new master link.

Feb 06, 2011 | 2004 Honda VT 600 C Shadow

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07 YZ450F First gear is to tall but then it peaks out to soon along the long trail,wil changing the rear sprocket down a tooth help ?

Find out what the tooth count on the rear sprocket was from the factory and see if you have a smaller sprocket than stock. THIS WILL BE FOR A FASTER TOP END.
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Jan 26, 2011 | 2004 Yamaha YZ 450 F

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Hello iwould like to lower revs by 1000at say 70mph what sprockets do i need

You will need either a larger transmission sprocket or a smaller wheel sprocket. The larger percentage change will occur with an increase in the front sprocket number of teeth. The way to mathematically determine that is to consider the present tooth ratio/RPM and relate that to the desired ratio. There are practical limits on how big the front sprocket can get before having interference problems. A 2-tooth increase should come fairly close. It would take about 4 to 6-tooth decrease in the rear sprocket to achieve the same results. Take your pick--the front sprocket should be cheaper and much easier to install. You will need to adjust the chain length accordingly. There will be a minor acceleration decrease due to the change. A fatter rear tire will also increase speed somewhat too. Hope this helps!

Jan 20, 2011 | 1992 kawasaki Zephyr 1100

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Hi i want know is possible to get rear spocket with 3 less tooth and will able ride better?

hi,you can get most sizes for a fj,check your local bike shop,if they dont have any in stock they can be made to order,they are a fairly common bike so you shouldnt have any problem,just make sure you get the right pitch sprocket,i think from memory that the fj is a 530 pitch,hope this helps...cheers

May 03, 2010 | 1984 Yamaha FJ 1100

1 Answer

How to increase top end speed - 2007 Kawasaki Ninja EX250R

you can change the sprockets.If you go to a 16 tooth front sprocket. two teeth on a front sprocket is like droping 4 teeth on the rear. You could drop 2 teeth on the rear sprocket but a 43 tooth is probably harder to find. the usual choices for front are 14,15,16 tooth.
For the rear they are 44,45,46 tooth

The way to remeber gearing changes is on REAR sprocket is smaller=faster and larger=slower top end.
the FRONT is OPPOSITE to the rear smaller=slower and bigger=faster.
You may have to lengthen or shorten the chain depending whjch way you go.

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At 70mph my engine is wound up pretty tight, it has a 16 front and a 46 rear,any suggestions

Just go to a larger front sprocket. An 18 tooth sprocket should help greatly. Alternate to that would be to get a smaller 38 tooth rear sprocket. The front sprocket will cost a lot less and is better for the chain than the current 16 tooth.

I don't get paid for my answers but I do take pride in them, and I am only trying to help. So if you will, > > > > A “very helpful” rating for this answer? Thanks!

Jun 13, 2009 | 1996 kawasaki VN 800 A Vulcan

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My aprilia sr125 is really quick off the mark but the topspeed is less than 50mph and i know thats not right but i havnt a clue why its lacking speed, any ideas?

You didn't say that the bike was not reaching full revs. Therefor The only thing that limits top end is the gearing. Call the dealer and find out how many teeth are on the stock front sprocket and the stock rear sprocket. Chances are that you have maybe 1 tooth less on the front sprocket and 4+ teeth more than stock on the rear sprocket. The smaller the front sprocket and the larger the rear sprocket, the lower the top speed will be.

Please rate this answer. Thanks!

Mar 31, 2009 | 2000 Aprilia RS 125

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