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Offline mikegml

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800 XR Gearing
« on: April 22, 2019, 10:06:25 PM »
Is it me or is the XR just a tad undergeared?  I love the engine tho it sometimes seems to be revving a touch high for the speed. I'm ok with it doesn't bother me much, just wondered what others think.

Online CB250G5

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Re: 800 XR Gearing
« Reply #1 on: April 22, 2019, 10:38:15 PM »
I have changed to a 17 tooth front sprocket.  Somewhat better.  May try a smaller rear when it's new chain time as well.
2015 Tiger 800 XRx, Yamaha RD350YPVS special, Yamaha TDR250 (being rebuilt), Yamaha SRX400 Super Single and a Voskhod 175

Offline walt

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Re: 800 XR Gearing
« Reply #2 on: April 22, 2019, 11:42:13 PM »
yep, too buzzy for me in 6th, especially on long M/way rides, just got a 17t to fit on front

Offline troop

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Re: 800 XR Gearing
« Reply #3 on: April 23, 2019, 12:12:15 PM »
I initially changed my OEM 16/50 gearing to 17/50. A nice improvement, but wanted more. Switched out my 17/50 > 17/47 combo. I like it a lot for interstate traveling, and the bike still pulls well at 80mph in 6th gear. With the 17/47 combo, 5th gear is equal to 6th with the stock 16/50 gearing. Chain length is fine but I did cut off (1) section of chain as I know I'll never go back to the 50t drive sprocket.

Offline mikegml

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Re: 800 XR Gearing
« Reply #4 on: April 23, 2019, 08:14:30 PM »
I don't want to go 'up' a tooth at the front.  I did that years ago and was amazed at how much higher it geared the bike. Also bought a bike (africa twin) where previous owner had done the same and again it was too highly geared.  I'm thinking of dropping the rear down at least one tooth probably two.

I'm OK with 1st gear but some seem to think it's too high, but top gear is definitely too low. I'm often not sure if I'm in 2nd or 3rd or 4th or 5th without looking at the dash. The problem which others have noticed is that the gear ratio's are too close and there's no real solution to that.

I'll probably go down 2 at the back and try that.
« Last Edit: April 23, 2019, 08:33:00 PM by mikegml »

Offline walt

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Re: 800 XR Gearing
« Reply #5 on: April 23, 2019, 08:35:15 PM »
I think the 2018 has a lower 1st than previous models....

Offline troop

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Re: 800 XR Gearing
« Reply #6 on: April 23, 2019, 09:32:59 PM »
Going up a tooth up front or down teeth on the drive sprocket raises the gearing = lowering rpm's at speed. Going down teeth up front/raising teeth at the rear lowers the gearing = higher rpm's at speed. As stated, the 2018 > 800's have a lower ratio 1st gear, but I believe the same ratio in 6th gear. If you want to drop/lower your rpm's while highway cruising in 6th gear, you'll either have to go up a tooth up front or down some teeth in the back.

Offline mikegml

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Re: 800 XR Gearing
« Reply #7 on: April 23, 2019, 09:38:32 PM »
I know?  That's why i'll go down two at the back.  The ratio's are too close is the problem and there's no getting round that one. I just want a few less revs mainly at top end which I think is way too low so I'll settle for a slight up gearing all round.
« Last Edit: April 23, 2019, 09:47:25 PM by mikegml »

Offline Paulhere

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Re: 800 XR Gearing
« Reply #8 on: April 24, 2019, 11:47:24 AM »
Two less teeth should give near 73mph instead of 70 at same rpm if me sums are good. Or 200rpm less at a steady 70mph. Don't sound much but should help mpg a tad, I'm getting 65mpg bimbling about but more like 50'ish at M'way speeds so any little helps between stops.
Tiger800 XRx, Tiger Sport 1050, Ariel FH 650, Yam Serow 225.

Offline mikegml

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Re: 800 XR Gearing
« Reply #9 on: April 24, 2019, 11:56:06 AM »
If you're right then it doesn't seem much of an improvement.  I'm wondering if it's worth the hassle as it's not a BIG deal for me.

 


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