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Old 07-02-2015, 10:21 AM   #1
SammyD OP
Joined: Dec 2013
Location: San Diego
Oddometer: 28
Cheap cush drive option

2002 XR650L

So I was doing some research on gearing and found a couple of interesting (to me) tidbits.

1. Avoid installing smaller sprockets where practical. The more a chain has to bend, the more wear it puts on it. So if you gear down, increase the size of the rear sprocket. To gear up, increase the size of the front sprocket. Y'all XR650l riders running a 13t front may want to take note.

2. A larger rear sprocket acts like a cush drive in that it somehow softens the pulse from the engine. That's what I read, so I tried it last night - put a 48t on the back (stock is 45t). I did notice a big difference, although I also noticed a difference (but not as great) from gearing down on the front sprocket also. I can tell you that compared to stock my bike has WAY less of a juddery ride - how much of that is down to the gearing v. larger rear sprocket - I'm not sure.

That's all!
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Old 07-02-2015, 10:48 AM   #2
Never too many bikes
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Joined: Apr 2010
Location: Berkeley Springs, WV
Oddometer: 566
If you use synthetic oil your bike will gain 5 HP and the motor will last twice as long too!

KTM 250EXC | KLR650
You can't say happiness without saying penis.
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Old 07-02-2015, 06:50 PM   #3
Beastly Adventurer
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Joined: Oct 2003
Location: Treasure Coast, Florida
Oddometer: 5,490
Left cheek.

Tongue in the left cheek.

Right ass cheek on the seat.

Reduces the dynamic loading and poof cush hub.
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Old 07-02-2015, 08:05 PM   #4
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Joined: Sep 2009
Oddometer: 8,486
No, no, no. Adjust your clutch lever to zero free play, then go about four more full turns of the adjuster.


Cushy drive!

On KTMs you simply use a zip tie to prevent the lever from going more than 3/4 of its return travel.

Navin screwed with this post Yesterday at 05:27 AM
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Old 07-02-2015, 10:48 PM   #5
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Joined: Sep 2010
Location: Australia
Oddometer: 431
It won't soften the pulse from the engine in real terms but it will make you use more revs for a given speed... giving a smoother feel to the ride.

Big sprockets do indeed give power transfer benefits But larger front sprockets give a doughy feeling as the lever effect of them robs torque in addition to making a taller final drive ratio. Non o ring chains also increase power transfer, as do tyres with slick tread and not knobs... How far do you want to take the concept?

A cush hub is a cush hub, plain and simple. I would recommend either installing one if you want to, or just maintaining your final drive well and keeping the drive splines on your countershaft clean and lightly oiled.
'90 XR600R, '00 VTR1000F
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