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View Full Version : X-Challenge 650 final drive gearing for green laning.



Timpo
10-03-08, 06:43
Hi Folks.
The last couple of trail rides I have taken out have been attended by a couple of XC650.
One had a slightly lowered final drive ratio, one tooth smaller front sprocket, the other had standard ratios.
If you are planning to use your machines for trail riding, I would recommend that you lower the gearing, as this will reduce the want of the bike to spin the back wheel in first gear when on tricky sections of mud or rock.
You need to be aiming at a slow walking pace and have first gear as a crawler gear.
Looking on the JT Sprocket website has given this result. It is showing a standard front sprocket of 16 teeth, I'd say try 14 teeth for a start.
http://www.jtsprockets.com/52.0.html?&L=0&sel_uid=2761&p=
As I said, one of the riders recently has lowered the front sprocket by one tooth, but this still wasn't enough in my eyes, for the knarly sections of trail.
What do you think?

Timpo.

Gaz
10-03-08, 08:04
The standard gearing is 15-47.
As you said, going to 14-47 doesn't seem to be enough, although over-use of the throttle may be an issue in my case as well:blast

I've looked all over for a 49 tooth rear.
There is an Italian company
http://www.redracingparts.com

who will make one up, but it could take up to a month to arrive, costs about 30 quid delivered.

I have a request in with Talon to get one sourced in the UK, hopefully I will speak with them later today.

p.s. a regular F650 rear sprocket will not fit (different carrier), thanks to Johnnyboxer for that info.

Possu
10-03-08, 10:33
B&C Express should be able to knock up a rear sprocket in no time if you can supply either the PCD & diameter of the bolt holes or send them yours to copy.

www.bandcexpress.co.uk

Used them before, happy to recommend.

Timpo
10-03-08, 11:37
Wemoto list a minus 2 teeth (13) for the front.
http://shop.wemoto.com/pictures.dyn?u=5836457qqq5828105
http://shop.wemoto.com/index.dyn?oid=5836457
Fronts.....always the easiest sprocket to change........ until the 450 comes along......:blast

Timpo.

JohnnyBoxer
10-03-08, 12:01
Gone for 14/47 on mine.............

Seems ok

Is it the bike or rider:nenau

Gaz
10-03-08, 12:46
Is it the bike or rider:nenau

Definitely both in my case.

PaulXC
10-03-08, 21:21
I was having real problems getting traction in the mud on Saturday with the standard gearing.

Just ordered a 14T and I'll see how I get on with that - I still need it to be useable on the road as its my only bike.

Paul

steve g
11-03-08, 20:31
Got a 14T on the front, seems ok.
Good thing is you dont have to shorten the chain, so if you want to go back to a 15T its quite straight forward.

Loz
11-03-08, 21:49
The standard gearing is 15-47.
As you said, going to 14-47 doesn't seem to be enough, although over-use of the throttle may be an issue in my case as well:blast

I've looked all over for a 49 tooth rear.
There is an Italian company
http://www.redracingparts.com

who will make one up, but it could take up to a month to arrive, costs about 30 quid delivered.

I have a request in with Talon to get one sourced in the UK, hopefully I will speak with them later today.

p.s. a regular F650 rear sprocket will not fit (different carrier), thanks to Johnnyboxer for that info.


if you change the rear sprocket you might need a longer chain


change the front 1 tooth=3teeth rear (ish)


loz