Changing overall gearing

AdventureDad · 12-03-2017, 05:37 PM

I wouldn’t do it. Stock was bad enough with slipping the clutch starting on a paved road, much less off road. It just doesn’t have the low end power to do it.

Jay In Milpitas · 12-06-2017, 11:52 AM

I read this about an hour ago and didn't think about it much, then it struck me that you bought the bike used, if I recall. It is possible the first owner changed the gearing, do you have the stock 14/44 sprockets or something else?

Citroenjunkie · 12-06-2017, 02:26 PM

I havent checked the sprockets to see how many teeth they have so I'll do that this weekend.

Our open road speed limit in New Zealand is 100kph and this is policed pretty strictly, so Im not really looking for huge top speed. I do hear what you're saying about the high first gear so I'll have to give the whole thing a real think through.

On a slightly linked topic does fitting a 19" front make the speedo more accurate? mine is well on it's way to being 20% over.

Have a great day

jbfla · 12-06-2017, 05:14 PM

Quote:

Originally Posted by Citroenjunkie

.....

On a slightly linked topic does fitting a 19" front make the speedo more accurate? mine is well on it's way to being 20% over.....

That seems quite a bit more error than most.

My speedo error at 60 mph was about 7 mph off.

With the 19" wheel and tire, it was about 4 mph off.

http://www.chinariders.net/showpost....9&postcount=34

jb

Jay In Milpitas · 12-06-2017, 07:18 PM

Quote:

Originally Posted by Citroenjunkie

On a slightly linked topic does fitting a 19" front make the speedo more accurate? mine is well on it's way to being 20% over.

Have a great day

I know that you are in NZ, but in this situation I think an Australian phrase is best used.
A 19" will make it less fucked, not make it fully accurate.

I know many folks have smart phones (I don't) that can be used as GPS speedometer. If you have that ability it may be the way to go.

pyoungbl · 12-06-2017, 08:49 PM

The 19" front wheel made my speedo darn near 100% accurate. The bike was shipped with the 19 installed and the 18 as an extra. I rode the 19 for a while and then swapped back to the 18 just to burn up that rubber. If/when I finally wear the 18 down to the wear bars i'll go back to the 19". With all that said, I was struck by the fact that the 19" wheel was tracking so closely to my GPS mph, much closer than any bike I have ever had. I think I was about 1% off. Now with the 18" it's at least 10% off (reads faster than reality).

As for changing the gearing, a 13 tooth front sprocket will tend to accelerate wear on the chain only because it makes the chain go through a tighter arc. If you go to a 15 you'll be forced to slip the clutch a lot just to get started. In my mind the stock 14 tooth sprocket is the best compromise. Play with the rear sprocket if you want to change the gearing.

12-06-2017, 11:52 AM	#2
Jay In Milpitas Join Date: Jul 2015 Location: Milpitas, CA. USA Posts: 775	I read this about an hour ago and didn't think about it much, then it struck me that you bought the bike used, if I recall. It is possible the first owner changed the gearing, do you have the stock 14/44 sprockets or something else? __________________ Horse holder at Madame Orr's House.
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12-06-2017, 02:26 PM	#3
Citroenjunkie Join Date: Feb 2017 Location: Dannevirke, New Zealand Posts: 47	Thanks I havent checked the sprockets to see how many teeth they have so I'll do that this weekend. Our open road speed limit in New Zealand is 100kph and this is policed pretty strictly, so Im not really looking for huge top speed. I do hear what you're saying about the high first gear so I'll have to give the whole thing a real think through. On a slightly linked topic does fitting a 19" front make the speedo more accurate? mine is well on it's way to being 20% over. Have a great day Last edited by Citroenjunkie; 12-06-2017 at 04:18 PM.
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12-03-2017, 05:37 PM	#1
AdventureDad Join Date: Apr 2016 Location: South Mississippi Posts: 253	I wouldn’t do it. Stock was bad enough with slipping the clutch starting on a paved road, much less off road. It just doesn’t have the low end power to do it.
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12-06-2017, 08:49 PM	#6
pyoungbl Join Date: Feb 2016 Location: Portsmouth, Virginia, USA Posts: 632	The 19" front wheel made my speedo darn near 100% accurate. The bike was shipped with the 19 installed and the 18 as an extra. I rode the 19 for a while and then swapped back to the 18 just to burn up that rubber. If/when I finally wear the 18 down to the wear bars i'll go back to the 19". With all that said, I was struck by the fact that the 19" wheel was tracking so closely to my GPS mph, much closer than any bike I have ever had. I think I was about 1% off. Now with the 18" it's at least 10% off (reads faster than reality). As for changing the gearing, a 13 tooth front sprocket will tend to accelerate wear on the chain only because it makes the chain go through a tighter arc. If you go to a 15 you'll be forced to slip the clutch a lot just to get started. In my mind the stock 14 tooth sprocket is the best compromise. Play with the rear sprocket if you want to change the gearing.
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