Which ratio for my application - Honda ATV Forum
Gear Reductions Discuss and post information on gear reductions.

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post #1 of 20 (permalink) Old 10-16-2018, 08:22 PM Thread Starter
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Which ratio for my application

I am new to this site but been around Hondas since the ATC 70 days(dating myself). I have several 1990 300TRX's and want to convert one machine into a slow puller for freighting stuff into our cabin site. Its a first gear trail, that being almost to fast as it tasks the centrifugal clutch a lot. I have 25 inch tires on the rear/24 inch up front and have been reading up on gear reductions some. If I had just one gear slower that would be awesome. What ratio would I be looking at? Thanks in advance for any suggestions on this!
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post #2 of 20 (permalink) Old 10-17-2018, 04:15 AM
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there are many reductions available these days for a 300 , I have 54% in a couple of them 54% is a lot , I can take off from a stop in 3rd ------------- I don't know what the smallest reductions ratios are for a 300 , have never tried any other ratio on a 300 except 54% , I do have 15% in my 450 and it is lower but not as dramatic as 54% , building a 450 with 35% right now , have not rode it yet with the 35% ----- you could have a reduction built for you any where from $500-600 and install it yourself
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post #3 of 20 (permalink) Old 10-17-2018, 07:32 AM
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I would be tempted to go with a 54% gear reduction myself. It may sound a lot and also sound over the top but going faster is easy by shifting up a gear, if an 18% or 32% is not low enough you’ll be kicking yourself.
My old 300 had a 54% and with 25’s was great around the farm yard for towing, usually 2nd or 3rd gear but first was perfect when you were carrying an unsteady load.
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post #4 of 20 (permalink) Old 10-17-2018, 10:29 PM Thread Starter
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Thanks guys for your input! I have been looking at the 34% gear sets and may go that way. Any suggestions to a good fabricator for these gear sets? Thanks!
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post #5 of 20 (permalink) Old 10-18-2018, 12:35 AM
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Thanks guys for your input! I have been looking at the 34% gear sets and may go that way. Any suggestions to a good fabricator for these gear sets? Thanks!
A 34% will cost you slightly more, I don’t know why...

Try ‘reduction boss’ (Jeremy Lee), Ron Shaw or Don Oglesby. You’ll find them all on Facebook.

98 300 Fourtrax 4x4

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2004 Foreman 450S

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post #6 of 20 (permalink) Old 10-18-2018, 09:38 AM
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Thanks guys for your input! I have been looking at the 34% gear sets and may go that way. Any suggestions to a good fabricator for these gear sets? Thanks!
I run several sets made by Jeremy Lee (Reduction Boss Machining here in NC). In my opinion his reductions are second to none. You can find him on facebook or I can send you his contact info if you are not on FB. If this is strictly a slow pulling machine I would probably go with the 34 on stock tires.
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post #7 of 20 (permalink) Old 10-19-2018, 02:28 AM
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Something might sway your way to a 35% , I am not sure if you have to do it on a 35% in a 300 , but with the 54% you have to grind away part of the crankcase and a bolt to make it fit , also the reverse lock out is by-passed on mine with the 54%
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post #8 of 20 (permalink) Old 11-15-2018, 11:39 AM Thread Starter
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I ordered a 34% reduction gear set from "Reduction Boss Machining" and am hoping to receive it soon. I will keep this updated when installed
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post #9 of 20 (permalink) Old 11-15-2018, 11:42 AM
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I ordered a 34% reduction gear set from "Reduction Boss Machining" and am hoping to receive it soon. I will keep this updated when installed
Excellent, great choice of manufacturer too, from what i gather he’s the best in the industry. Look forward to hearing what you think of it once installed :-)

98 300 Fourtrax 4x4

Custom built mud bike - Now sold.

2004 Foreman 450S

Fully overhauled (nut & bolt rebuild), 2” lift kit, 28” mega mayhems, ITP delta rims, ES floorboards, 22” LED lightbar, Pyle Bluetooth sound system.
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post #10 of 20 (permalink) Old 11-15-2018, 12:01 PM
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Great idea. i was thinking that 1st and maybe 2nd would be worthless with stock tires and wheels. 54% would give you less than half of your top speed in high gear...........maybe 20 mph at 6000 rpm's?
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