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Old 08-08-2016, 06:02 PM   #1
Craigdaniel
 
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Default 76 DT175 Swap out 48T rear gear for higher top end speed

1976 DT 175. I want to swap out the existing 48T rear gear to get a better top end speed. I have a couple questions
1) It is better to get a gear set with a smaller front gear and a bigger rear gear or just to get a bigger rear gear and a longer chain?
2) Where can I get these parts?
Thanks to all
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Old 08-08-2016, 10:05 PM   #2
lha
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Depending on what you have in front,a larger[one tooth] primary sprocket will be easier to change out than the rear. That's assuming that you have stock sprockets. Some people put a 13 or even a 12 tooth sprocket to get better low-end power,but end up chewing up their chain due to overrunning the sprocket.
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Old 08-08-2016, 10:43 PM   #3
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Default Backwards, man...

Quote:
Originally Posted by Craigdaniel View Post
1976 DT 175. I want to swap out the existing 48T rear gear to get a better top end speed. I have a couple questions
1) It is better to get a gear set with a smaller front gear and a bigger rear gear or just to get a bigger rear gear and a longer chain?
2) Where can I get these parts?
Thanks to all
If you want a faster bike at the top end, you need a bigger front sprocket and/or a smaller rear sprocket. The set up you outline (smaller front and bigger rear) will get you more power but less speed...

Just sayin'
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Old 08-09-2016, 12:27 AM   #4
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Jim663, yes thats the direction I want to go.
Is it better to change both gears or get a whole new set? Where can I get this stuff for a bike thats so old?
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Old 08-09-2016, 07:38 AM   #5
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Default ebay

ebay has lots and lots of front sprockets daily (79 listings in a quick search just now). As for the rear, I would think they do have those as well (89 listings right now). What is the current condition of your chain and sprockets? Doesn't make much sense to change one if the others are worn out. But I think I'd start small: change the front sprocket to one with one more tooth and see what the end result is. If that's enough, there you go. If not, take a tooth or two out of the rear as well. Determine the condition of the chain and sprockets and go from there. If they are all sad, a quick trip out on the road to see what the change is like won't kill the new sprocket. But change them all if you need to before too much riding.
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Old 08-11-2016, 09:20 PM   #6
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The condition of the gears and chain are ok. Will just 1 tooth make a difference?
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Old 08-11-2016, 10:44 PM   #7
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Quote:
Originally Posted by Craigdaniel View Post
The condition of the gears and chain are ok. Will just 1 tooth make a difference?
.... .front sprocket ? yes .... rear sprocket ? yes - a bit - depends how high you are already in the RPMs Randy
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