A forum for owners of Yamaha TTR250 trail and enduro bikes!

TTRHead · Senior Member

Gearing

sena · Veteran Member

TTRHead wrote:
I found it better off road rather than on road I must say. But to me it doesn't seem happy unless you are revving the nuts off it?

Hello,

someone more experienced will tell you more about gearing. My own experience changed a lot with tyre replacement: went from mixt/road to cross/enduro in fairly used condition from a friend's KTM. These inflated to 1bar made me feel like the bike was "dancing" on the road. I tried to inflate more: felt more stable but that affected the grip (my weight was 58Kg) and any bump or hole on the road was a pain in my butt. After 2-3 weeks riding, my feeling was "this bike tolerates a lot while riding inaccurate. 1-2 degree left or right makes little difference on my TTR, compared to a small road bike like Apsonic 110, Leopard-125, Pulsar-160 (cheap chinese and indian bikes imported in my country) on these ones any degree wrong can make me fall.

TTRHead · Senior Member

Gearing question

TTRfan · Super Guru

Trouble is that your only option to gear down is to put on a bigger rear sprocket which means you will need to buy a longer chain - unless you have some chain offcuts to put in.

13/48 or 14/52 seems to be favourite with our customers who use their TTRs for green laning!

Brian

Cubber · Super Guru

For future reference I have loaded a TTR specific gear ratio calculator onto my Google Drive. smile

Access the XL spreadsheet by clicking THIS link.

You will then have the oportunity of downloading an easy to use spreadsheet where sprocket sizes can be adjusted and comparisons made.

Hopefully the spreadsheet is self-explanatory. hmm

Martyn

TTRHead · Senior Member

cheers cubber. I think I will go with 14/52 as per brians advice

-- Edited by TTRHead on Tuesday 21st of October 2014 11:43:49 PM

Yuraku · Veteran Member

Hey - it works OK, thanks

I had a problem when I used IE disbelief but OK with Google Chrome, Opera and Mozilla. aww

Yuraku

TTRHead · Senior Member

Can someone add this to te sticky

I have gone 14/52 110link chain AC10 110/100/18

Adjusters at 4.2 wheels has clearance

Doesn't rub or touch the mud flap or swing arm

-- Edited by TTRHead on Saturday 25th of October 2014 06:22:11 PM

paulchucky · Member

im on 14-52 good climbing ability and lifts in 3rd on throttle pulls well n im 17 tonne ! bit thirsty than others about a £1 more on fill ups but worth it lol

mypobox · Veteran Member

Im 250 lbs and carry at least another 20lbs. I have stock 13/52 and it pulls like a mule. I love it.

Pinman · Member

Did you need to lower the chainguide to accommodate the larger rear sprocket or is it coping with the tighter chain angle without too much wear?

mypobox · Veteran Member

This is stock on USA bike. No mods done.

TTRfan · Super Guru

Pinman wrote:
Did you need to lower the chainguide to accommodate the larger rear sprocket or is it coping with the tighter chain angle without too much wear?

The US model of the TTR uses a 3-bolt lower chain guide which is different to the Euro 2-bolt guide and I am guessing is lower to accommodate the bigger rear sprocket.

Brian

petenz · Super Guru

I like 12/47 for the dirt..
then it's just change to a 14 front sprocket & adjust the chain for the road..

j180 · Senior Member

I mainly use mine on the road, duel carriage way which is 50 mph will the 13/48 be ok for this or will it cause the bike to be too buzzy. Also will it lift the front at all as it struggles on go airborne at the moment.

Cheers John

Terrence R · Senior Member

j180 wrote:
I mainly use mine on the road, duel carriage way which is 50 mph will the 13/48 be ok for this or will it cause the bike to be too buzzy. Also will it lift the front at all as it struggles on go airborne at the moment.

Cheers John

I'm running 13/46 for mixed tight trail and some road riding. I had it doing 130kph on the highway, but that was with it revved pretty high, which I don't reccomend. I just wanted to see how fast I could get it to go. With that gearing, i still have a nice low 1st gear. With your 13/48, doing 50mph (80kph), it won't be too buzzy.

i find these bikes aren't the best for lifting the front wheel, but its most certainly do-able. I love starting in second gear, pulling back and going through the gears on a big straight stretch wheelie. I can usually get it travelling pretty good all the way through to 5th gear. 6th gear just won't happen though.

BM Steve · Guru

mypobox wrote:
Im 250 lbs and carry at least another 20lbs. I have stock 13/52 and it pulls like a mule. I love it.

I have been running 14/52 for a while now but ordered a 13 from "The Chain Gang" the other day, cant wait to see the difference

The 14/52 pulls really well up hill but would like a bit more