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Active Member
 29 tooth front sprocket
I mentioned in another post about a 29 tooth front sprocket from Mel's.Here is the reply I received"Hi Jay, Yes we are starting to make the Solid billet aluminum front sprocket. We found that you can only go one tooth bigger due to what adjustment BRP has. We are going to make one with one tooth missing. Stock sprocket is 28 teeth ,our new sprocket is 29 teeth and we will be coming out with a 27 tooth in the next 2 weeks. the 29 tooth saves gas how much? But less RPM = less gas, we don't really know because I can't drive 55. Thank you Jimmy MMG" no mention of price though.So for those who want to drop RPM's a little and possibly increase top end this could be the ticket.
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 6 states down 42 states to go 
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 Originally Posted by Just Doo Me
I mentioned in another post about a 29 tooth front sprocket from Mel's.Here is the reply I received"Hi Jay, Yes we are starting to make the Solid billet aluminum front sprocket. We found that you can only go one tooth bigger due to what adjustment BRP has. We are going to make one with one tooth missing. Stock sprocket is 28 teeth ,our new sprocket is 29 teeth and we will be coming out with a 27 tooth in the next 2 weeks. the 29 tooth saves gas how much? But less RPM = less gas, we don't really know because I can't drive 55. Thank you Jimmy MMG" no mention of price though.So for those who want to drop RPM's a little and possibly increase top end this could be the ticket.
If -1 tooth will make the top end increase and better mileage then lets get one with only 10 teeth! Maybe we can get this sucker up to 200mph and still get 50mpg!
I be waiting for the report from someone after they install to see if it makes a noticible difference. Thanks for the news.
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Very Active Member
I would think if there was much to gain (either way) that Ken would have made a kit already.
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Originally Posted by Firefly
I would think if there was much to gain (either way) that Ken would have made a kit already.
I did speak to ken about this and he did thought about doing this but gave up on it. Initial investment was too high to recoup with limited sales. He felt not only the new sprocket was needed but a new belt as well. I think it was the belt that would have bigger impact on cost of production.
Mmg is saying they can get away with one less or more teeth with stock belt
6 states down 42 states to go
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If my calculations are correct, this is only worth a couple of hundred rpm at highway speeds. I doubt that's enough to help much either way.
-Scotty 
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Very Helpful Member
Originally Posted by aka1004
I did speak to ken about this and he did thought about doing this but gave up on it. Initial investment was too high to recoup with limited sales. He felt not only the new sprocket was needed but a new belt as well. I think it was the belt that would have bigger impact on cost of production.
Mmg is saying they can get away with one less or more teeth with stock belt
Not sure what Ken's garage is like but MMG is basically a machine shop so he can make everything he sells. He doesn't have to outsource manufacturing.
Former Happy Spyder Owner
Just decided it was time to move onto other things.
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Originally Posted by bjt
Not sure what Ken's garage is like but MMG is basically a machine shop so he can make everything he sells. He doesn't have to outsource manufacturing.
I believe he farms out everything
I can not believe sprocket itself will be that expensive if he machines it out himself I contacted another manufacturer but they have not gotten back to me yet.
6 states down 42 states to go
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By advanced calculus - going from 28 to 29 teeth provides an increase in gear ratio by [(29/28)-1] or approximately 3.6%.
So, at 5000 RPM fixed, instead of 69 MPH, we'll be running at 71.5 MPH; or at 70 MPH fixed, RPM will drop from 5072 to 4897 and (if all else is same) instead of 30 MPG we'll be getting 31.1 MPG.
Of course, the opposite is true too... going from 28 to 27 gives you ~3.7% more torque and less MPG.
Last edited by QuadManiac; 07-15-2009 at 06:13 PM.
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Originally Posted by aka1004
I believe he farms out everything.
I have been to his garage/machine shop, which is located at his house. He and his father are a "class act" and they both own Spyders. I purchased his back rest and rode over to have him install it. He has some great products and many more ideas. Check out his shop pictures.
http://www.melsmonstergarage.com/gallery.htm
And his eBay store.
http://stores.shop.ebay.com/Mels-Mon...__W0QQ_armrsZ1
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Originally Posted by QuadManiac
By advanced calculus - going from 28 to 29 teeth provides an increase in gear ratio by [(29/28)-1] or approximately 3.6%.
So, at 5000 RPM fixed, instead of 69 MPH, we'll be running at 71.5 MPH; or at 70 MPH fixed, RPM will drop from 5072 to 4897 and (if all else is same) instead of 30 MPG we'll be getting 31.1 MPG.
Of course, the opposite is true too... going from 28 to 27 gives you ~3.7% more torque and less MPG.
To Santa: can I get a sprocket with 25 teeth and a new belt?
Last edited by aka1004; 07-15-2009 at 06:37 PM.
6 states down 42 states to go
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Originally Posted by Rando
I meant ken farms out his actual manufacturing
6 states down 42 states to go
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$149.95
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Originally Posted by Rando
Nice!!!
6 states down 42 states to go
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Originally Posted by QuadManiac
By advanced calculus - going from 28 to 29 teeth provides an increase in gear ratio by [(29/28)-1] or approximately 3.6%.
So, at 5000 RPM fixed, instead of 69 MPH, we'll be running at 71.5 MPH; or at 70 MPH fixed, RPM will drop from 5072 to 4897 and (if all else is same) instead of 30 MPG we'll be getting 31.1 MPG.
Of course, the opposite is true too... going from 28 to 27 gives you ~3.7% more torque and less MPG.
Unfortunately, rpm, mpg, and mph are not related in a one-to-one ratio. Getting 3.6% more miles per hour, or dropping the rpm 3.6% will not increase the gas mileage by 3.6% If that were the case, EPA city mileage would be about double the highwayy mileage. We all know that is not the case.
-Scotty
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The clutch already has a rough time during launches with 1st gear being so tall. Increasing the sprocket size will put more stress on the already stressed component,especially riding 2 up, IMO.
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6 states down 42 states to go
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Wouldn't surprise me if nanny gets upset.
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I just asked him to send me the Excel file that compares the stock vs. 29 tooth sprocket.
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28t vs 29t comeing 27t
gear - speed - 28t rpm - 29t rpm - red. rpm
1 - 20 - 3400 - 3400 - 0
2 - 30 - 4100 - 3750 - 350
3 - 40 - 4150 - 4000 - 150
4 - 50 - 4300 - 4100 - 200
4 - 60 - 6000 - 5000 - 1000
5 - 50 - 3600 - 3500 - 100
5 - 60 - 4400 - 4200 - 200
5 - 70 - 5100 - 4800 - 300
5 - 80 - 5800 - 5600 - 200
5 - 90 - 6600 - 6400 - 200
5 - 100 - 7250 - 7000 - 250
should have spec. on 27t by fri.
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Originally Posted by aka1004
Woohooo bring it on
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Originally Posted by prodrag69
gear - speed - 28t rpm - 29t rpm - red. rpm
1 - 20 - 3400 - 3400 - 0
2 - 30 - 4100 - 3750 - 350
3 - 40 - 4150 - 4000 - 150
4 - 50 - 4300 - 4100 - 200
4 - 60 - 6000 - 5000 - 1000
5 - 50 - 3600 - 3500 - 100
5 - 60 - 4400 - 4200 - 200
5 - 70 - 5100 - 4800 - 300
5 - 80 - 5800 - 5600 - 200
5 - 90 - 6600 - 6400 - 200
5 - 100 - 7250 - 7000 - 250
should have spec. on 27t by fri.
Check line #4 I think there is an extra "0"
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