What About a 44 Tooth Sprocket?
06-16-2006, 08:09 PM
#1
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What About a 44 Tooth Sprocket?
Anyone have any comments regarding the use of a 44 tooth rear sprocket with a stock front sprocket on a VTR? I'm considering this for my streetfighter.
The story...
I have Dymags wheels with a Talon (TR181-41) aluminum rear sprocket that is showing some wear. It does not use a standard VTR part (5 bolts) but rather a special Dymag part (6 bolts). Apparently there is no US distributor for the street sprockets. I intended to buy a sprocket from Talon for $37, until I found out it would cost $45 just for shipping.
Talon put me in touch with Wild Brothers Motorsports who has some Dymag sized sprockets. However, they only have a 44 tooth and a 51 tooth available. I didn't even consider the 51 tooth sprocket
.
The story...
I have Dymags wheels with a Talon (TR181-41) aluminum rear sprocket that is showing some wear. It does not use a standard VTR part (5 bolts) but rather a special Dymag part (6 bolts). Apparently there is no US distributor for the street sprockets. I intended to buy a sprocket from Talon for $37, until I found out it would cost $45 just for shipping.
Talon put me in touch with Wild Brothers Motorsports who has some Dymag sized sprockets. However, they only have a 44 tooth and a 51 tooth available. I didn't even consider the 51 tooth sprocket
.
06-16-2006, 08:28 PM
#2
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It depends on what sprocket you're running on the front. You should be asking what ratio is good. 41/16= 2.56 43/15= 2.866
I'm running 43/15 on mine and really like it. Anything lower makes it hard to stay off the rev limiter.
I'm running 43/15 on mine and really like it. Anything lower makes it hard to stay off the rev limiter.
06-16-2006, 11:14 PM
#4
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I'm running a fighter too and I can only get it up to 145 indicated which is about 138 actual. Gear your bike for its realistic top speed or for mileage. 43/15 is perfect for me.
As far as the chain fitting you will have to get a little clever. Either link the chain up on the bike or pull the front sprocket. Moving the adjusters all the way up and trying to turn the chain on will not work. Before messing with this chain/sprocket bs remember one tooth down on the front will be like 2.7 teeth up on the back.
As far as the chain fitting you will have to get a little clever. Either link the chain up on the bike or pull the front sprocket. Moving the adjusters all the way up and trying to turn the chain on will not work. Before messing with this chain/sprocket bs remember one tooth down on the front will be like 2.7 teeth up on the back.
06-17-2006, 06:48 PM
#5
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Originally Posted by superhawk22
It says a stock front so that would be 44/16=2.75 should work well as long as the chain still fits.
I would like to use gearing more appropriate for the street. I'm not going to tour on it and gas mileage is not a major concern :razz:.
The way I calculate it out:
41/16=2.56 (stock)
44/16=2.75 (-7%)
43/15=2.87 (-12%)
44/15=2.93 (-14%)
Numerically it seems like this would be a nice compromise if the chain will fit.
06-18-2006, 09:29 AM
#6
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I just installed my 43 rear with my stock chain. With a 15t front I had to crank the adjusters all the way up for a still tight fit. You would be bigger on the front and back making for an even tighter fit. I wouldn't try it.
If I were you I'd run a 15 in the front and run a stock rear. It would give you almost the same ratio as going up 3 in the back. If you don't have a good stocker I'm sure someone on the forum would sell you theirs for very cheap.
If I were you I'd run a 15 in the front and run a stock rear. It would give you almost the same ratio as going up 3 in the back. If you don't have a good stocker I'm sure someone on the forum would sell you theirs for very cheap.
06-18-2006, 10:50 AM
#9
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You say six bolt pattern? The CBR929/954 uses a very similar sprocket as the VTR but uses six bolts and a bigger pattern. If you can confirm it will work I have a stock 2000 929RR 43T sprocket you could have for free.
06-18-2006, 11:39 AM
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Thanks for the info that the stock chain will not fit.
The way I see it, I have the following options:
1. spend $81 for a $36 part
2. modify a sprocket for a different application to fit
3. contact a sprocket mfr (Vortex/Sidewinder) and have them make one
4. buy a longer chain to fit the 44 tooth sproket.
#1 may be the cheapest, however, #3 may make it easier to obtain a future replacement.
Does anyone know if measuring from the outside of one hole to the inside of the hole directely opposite will yield the bolt circle diameter?
Here's a link to a handy-dandy gearing chart from Sidewinder:
http://www.sidewindersprockets.com/images/ratioa.gif
Thanks
The way I see it, I have the following options:
1. spend $81 for a $36 part
2. modify a sprocket for a different application to fit
3. contact a sprocket mfr (Vortex/Sidewinder) and have them make one
4. buy a longer chain to fit the 44 tooth sproket.
#1 may be the cheapest, however, #3 may make it easier to obtain a future replacement.
Does anyone know if measuring from the outside of one hole to the inside of the hole directely opposite will yield the bolt circle diameter?
Here's a link to a handy-dandy gearing chart from Sidewinder:
http://www.sidewindersprockets.com/images/ratioa.gif
Thanks
06-18-2006, 01:49 PM
#12
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#5 Bring your drive into a parts place and see if you can match it up with a different sprocket. Or #6 get a couple of master links and I'll give you my old chain cut it and you can make your chain longer.
06-19-2006, 11:31 PM
#13
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Thanks for the offer S/H22... I'll keep it in mind.
Here's the latest from Talon...
Hi Ron
The TR181 sprocket has a 63.3 bore (hole in the centre) and has a 95.25
PCD (pitch circle diameter) for the bolts.
We are hoping to be in contact with Wild Bros Motorsports about selling
all our road bike sprockets, so perhaps in the future he will have these
in stock.
Best regards
Val
So it looks like I have what I need to check out the cost of getting a new sprocket...
Here's the latest from Talon...
Hi Ron
The TR181 sprocket has a 63.3 bore (hole in the centre) and has a 95.25
PCD (pitch circle diameter) for the bolts.
We are hoping to be in contact with Wild Bros Motorsports about selling
all our road bike sprockets, so perhaps in the future he will have these
in stock.
Best regards
Val
So it looks like I have what I need to check out the cost of getting a new sprocket...
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