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Old 05-04-2012, 07:31 PM   #11
JamesD
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.

I'll have to drive up one of these days and have you show me some trails . . . .

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Old 05-04-2012, 09:00 PM   #12
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Quote:
Originally Posted by JamesD View Post
.

I'll have to drive up one of these days and have you show me some trails . . . .

.
Anytime! This place is called "Tower Mountain" AKA Krell hill. Elevation 3642 feet above sea level.

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Old 05-04-2012, 09:04 PM   #13
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Im trying 16/39 on my dt400 tat bike tomorrow. Never ran that combo, but looking for a better combo for long distance rides...... Tried it tonight, seemed to be ok, but will give a workout tomorrow.....
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Old 05-04-2012, 09:06 PM   #14
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Quote:
Originally Posted by timmyboy188 View Post
Howdy guys. So I need to get my dt 250 at a higher top speed. I'm thinking a 14 44 would be a good choice. I'm currently running 13 47, and I am sitting at about 4k rpms at about 40 MPH. I would like to be around 55-60 at around 4500 rpms. Thoughts on the proper gearing to gain this type of cruising speed?

Thanks,

Tim
I just finished test riding my Yamaha. With 15/47 gearing, the bike turns 4600 RPMs at 55 MPH. I don't know what the top speed is with this setup, but at 55 MPH it wasn't even working hard.
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Old 06-24-2014, 03:37 AM   #15
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I'm running 14/39. I got to 70mph. The bike, 74 dt250, was still pulling. So I haven't even max'd out yet.
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Old 04-05-2015, 08:15 PM   #16
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Default dt 175 gearing

I run an 18 front and stock 45 rear , cruise at 50 -55 mph easy sometimes run up to 65+ just for shits, but i try and keep her under 5000 rpm as she wasn't meant to run on the road for a long time.
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Old 04-06-2015, 10:58 AM   #17
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It's easier to change the primary sprocket,so I have a 14.15,and 16 tooth.
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Old 06-28-2015, 12:58 PM   #18
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Default Top speed

I have a 1973 at3 125 yamaha. I need to gain more top speed so it doesn't work to hard. Everything is stock.
what sprockets should I use for this.
It's current rpm at 35 mph is about 4k and 45-50 mph is running 6-7k rpm

Can someone help me with this?

Jason
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Old 07-03-2015, 08:10 AM   #19
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You didn't mention your ratio of primary to final drive sprockets,but a larger primary will give you a higher ratio,and you'll be able to change it fairly quickly if you need to.
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