Gear up Alpha

Sage Crusher

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Son has 2019 ALpha 165- and when we had his 2018 mountain cat we geared it up as it always seem to low for the mountains-and maybe gain some track speed- Anyone play with ratios yet.??
BTW the sled is an animal- way impressive in stock form.
 

Sage Crusher

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did my 19 mc last year to 20/50 not much to be had
HMMM Thought it might benefit from it and get away from some of the trenching.. I guess 2.5 ratio is acceptable but hope there would be a bit more to be had.. Are the bottom gears still crap ones that generally were eaten by the chain? or did they go to a true gear finally.. I remember the 15 M 8's had that bottom gear issue.

Have not tore the chain case apart yet- was going to see here what was advisable...
 
Jan 20, 2009
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The bottom gear is aluminum. BDX makes a lightweight steel 50 tooth to replace it. They did not offer it when I first changed out mine so I have a team 50 tooth steel gear in mine.
 

Chewy22

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The drivers are larger on the Alpha - 3.5 vs 3.0. So the 19/50 is not as ‘low’ on the Alpha compared to the others.
 

DITCHBANGER

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6 tooth x 3.5 pitch=21"circumference

7 tooth x 3 pitch = 21" circumference.

Same size for gearing calcs
 

kanedog

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I went with a 22/72, 3.27 gear ratio.

Experiment! Think outside the box.
 
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kanedog

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Did you ever leave a dirtbike in 1st gear all day?
Neither have I, but that's how I imagine this is going to feel.
Like the post said, think outside the box. The possibilities are more than you can imagine.
 

summ8rmk

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bottom line is i need to get that Aluminium gear out of there at least.. didn't take into consideration the 3.5 pitch drivers..
Not necessary.
Thousands of sleds with thousands of miles over the last 6+ yrs and zero failures of the aluminum sprocket.....

The aluminum sprocket has a lot of wear initially however, once the sprocket conforms to the shape of the chain..... they maintain that shape for a very long time.

The small aluminum shavings in the oil will not harm the chain, bearings, or sprockets, all those materials are much harder...

Sent it
 
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