TRX250r.org

Author Topic: Gearing help  (Read 4306 times)

Offline Sand_Blaster

Gearing help
« on: October 14, 2017, 06:55:16 PM »
Hey. What gearing should I try for 22" 10 paddle haulers?
I'm looking at roughly 55-60hp and 4" extended swing arm. I wan't to be able to launch in second gear still.. should I stick with stock gearing?
Thanks
87 Trx250r & 99 Banshee

Offline hickwheeler

Re: Gearing help
« Reply #1 on: October 14, 2017, 07:21:59 PM »
You will need probably a 42 out back. With 13-40 I was not able to launch in 2nd. With 22 8 paddle
88 hybrid 431 puma
88 (BOF Build) stock motor and oem 89 plastics
More in the works

Offline jwraymond6

Re: Gearing help
« Reply #2 on: October 14, 2017, 07:27:22 PM »
I run a 13/38 with 22" 8 blade paddles with my motor around 65hp mine bogged launching in 2nd ask Loren I believe his launches in 2nd pretty good
87 363 sphynx built by Pete @ hybrid engineering

Offline Sand_Blaster

Re: Gearing help
« Reply #3 on: October 14, 2017, 09:23:12 PM »
Well that's no good. I'd prefer to launch in second for sure.
87 Trx250r & 99 Banshee

Offline broken1

Re: Gearing help
« Reply #4 on: October 14, 2017, 10:01:57 PM »
Since your on the lighter side stock gearing would probably be fine for you to launch in 2nd. I weigh about the same as you & always come out of the hole in 2nd with stock gearing. I run a 20" 8 paddle hauler but have probably 15-20hp less then you do so it should be close to the same.

Offline The norm

Re: Gearing help
« Reply #5 on: October 15, 2017, 01:27:31 AM »
13-42 gearing on my bike and I launch in second no prob. My swinger is a +3 and my tires are 21-12-8 9 paddle. The 42 is actually a rear sprocket from a 400ex.
« Last Edit: October 15, 2017, 11:20:05 AM by The norm »
1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

Offline Sand_Blaster

Re: Gearing help
« Reply #6 on: October 15, 2017, 01:53:39 PM »
Sweet thanks. I'll try that gearing, thanks Loren.
87 Trx250r & 99 Banshee

Offline jwraymond6

Re: Gearing help
« Reply #7 on: October 16, 2017, 11:44:16 AM »
Here's a sprocket gear ratio chart that might help you

http://www.jtsprockets.com/fileadmin/files/jtgearratio.pdf
87 363 sphynx built by Pete @ hybrid engineering

Offline Sand_Blaster

Re: Gearing help
« Reply #8 on: October 16, 2017, 12:21:04 PM »
Thanks Jeremy I'll use that chart. Where do you get your sprockets from ?
Rocky Mountain atv only has 38/39 nothing more.
87 Trx250r & 99 Banshee

Offline jwraymond6

Re: Gearing help
« Reply #9 on: October 16, 2017, 12:28:32 PM »
Thanks Jeremy I'll use that chart. Where do you get your sprockets from ?
Rocky Mountain atv only has 38/39 nothing more.

Rocky Mountain usually
87 363 sphynx built by Pete @ hybrid engineering

Offline jwraymond6

Re: Gearing help
« Reply #10 on: October 16, 2017, 12:31:25 PM »
Thanks Jeremy I'll use that chart. Where do you get your sprockets from ?
Rocky Mountain atv only has 38/39 nothing more.

Rocky Mountain usually

Pretty I've gotten a 40t from them before
87 363 sphynx built by Pete @ hybrid engineering

Offline jwraymond6

Re: Gearing help
« Reply #11 on: October 16, 2017, 01:35:26 PM »
I have a 45t rear if you wanna try it
87 363 sphynx built by Pete @ hybrid engineering

Offline jwraymond6

Re: Gearing help
« Reply #12 on: October 16, 2017, 04:40:04 PM »
I found these on eBay but there aluminum I don't think they hold up as well

https://m.ebay.com/itm/132303425361
87 363 sphynx built by Pete @ hybrid engineering

Offline Sand_Blaster

Re: Gearing help
« Reply #13 on: October 16, 2017, 04:47:21 PM »
Hmmm those are interesting. I may have to try one, my renthal aluminum has held up well so far.
87 Trx250r & 99 Banshee

Offline The norm

Re: Gearing help
« Reply #14 on: October 16, 2017, 09:48:49 PM »
You have to order the 42T for a 400ex
1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

 

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