When changing your sprockets due to wear, you will also need to replace your chain. The chain and sprocket relationship is best when the two wear together. Mixing an old chain with a new sprocket - or vice versa - will shorten the life of either. Not a good idea. And if you make a big change in sprocket size, you may need a shorter or longer chain. As you know, the stock chain is too short for that gearing. I use a KTM 14t x 52t Renthal with a Regina Z ring 520 chain. Length 120 but you will need to remove a few links to get the rear axle positioned about mid way in swingarm adjustment.
.OWNER'S MANUAL 2010 450 EXC EU 530 EXC EU 450 XC-W USA ART. 3211484en.KTM accepts no liability for delivery options, deviations from illustrations and descriptions, as well as misprints and other errors.KTM workshop.29 Chassis number. 9 Important maintenance work to be carried out by an Type label. 9 authorized KTM workshop. (as additional order).30 Key number (EXC EU).9 Important checks and maintenance work to be carried Engine number.9 out by the rider.TECHNICAL DATA - ENGINE TIGHTENING TORQUES.88 Changing the rear brake linings.60 TECHNICAL DATA - CARBURETOR.90 Removing the front wheel. 61 450 EXC EU.90 Installing the front wheel. 61 XC‑W USA.90 Removing rear wheel.62 530 EXC EU.All work marked with this symbol requires specialist knowledge and technical understanding.
![Ktm 15/42 To 15/45 Chain Length? Ktm 15/42 To 15/45 Chain Length?](/uploads/1/2/5/3/125376290/984179115.jpg)
In the interest of your own safety, have these jobs done in an authorized KTM workshop! There, your motorcycle will be serviced optimally by specially trained experts using the specialist tools required.Warranty The work prescribed in the service schedule must be carried out in an authorized KTM workshop and confirmed in the customer's ser- vice record, since otherwise no warranty claims will be recognized. No warranty claims can be considered for damage resulting from manipulations and/or alterations to the vehicle.IMPORTANT NOTES Transport Note Danger of damage The parked vehicle can roll away or fall over. – Always place the vehicle on a firm and even surface. Note Fire hazard Some vehicle components get very hot when the machine is driven.
A place for news, talk, and advice relating to dual sporting.No self-promotion such as shameless seeking attention on Facebook, Twitter, Instagram or other social media.No Memes.No For-Sale Posts.If you are looking to sell or buy head over to:If you are looking for riding buddies post your location before your bike in your flair.Ex: Vancouver Island - 2000 DR Z400SThe big one.When a plate is just too heavy!Motorcycle-camping!German bikes.The dark side.4 wheels of fury.Bike specific subs:Local Forums. Hey guys, so I bought a 500exc last year and I love the bike except for a few things. One of my biggest complaints is the gearing. I cant lug the thing at all. My old 150sx could handle single track way better than this.
The stock gearing is 15/45.The gearing is okay for the high way, but to even shift into 6th I need to be going about 63-65 mph. I was thinking about putting a 49 tooth rear sprocket on.I just want your guys opinions before I purchase. Would 49 tooth be a significant change? Should I try something like a 14/48 like a friend of mine sugguested? Just not sure.I do a lot of single track but I also do some commuting and riding on the backroads above 60mph. I dont want to be revving the bike out at 65 but I definitely dont want to barely be able to shift into 6th at that speed either. Thoughts?Edit: Sounds like I'm going with a 14/50.
If I don't like it, I always have the stock sprocket. I can crawl in 1st gear and ride very technical stuff. Very easy to pop the front wheel up. 2nd is used a bunch as well. That being said, again, I'd consider slightly lower for my riding style (like 14/52). I think 14/50 is an ideal place to start and very likely will be your sweet spot. AFAIK the 500xcw comes stock with 13/48, which is the same as 14/50 (someone check my math!).What kind of riding are you doing?
The reason I might go lower is because EVERYTHING we ride is tight. If you ride a bit more open stuff with plenty of roads, 14/50 is probably ideal. I ride a similar KTM an 11 530 EXC-R. I ride primarily in the desert southwest, costal CA, and Baja. My bike is geared 14-49 with this it will run to just over 100 flat out.
Don't know where you are located but for tight single track and woods I would think about a 13 or 14 up front and a 50 or 51 in the rear. A riding partner runs 14-51 on his 300 XC and it is really fast to about 80 MPH and then sorta gives up, but it will climb walls. I am pretty sure you will have plenty left at the top end and have some down low grunt as well. Every front tooth is equal to 3 back as far as engine to wheel rep ratios go.
So your buddy's suggestion of 14/48 is equal to going up to 15/51. The advantage to his suggestions is it helps balance chain length so you can try and keep things close if you want to change configurations with the same chain.On the ratio to shoot for, 6th gear gives you a lot of leeway. I don't remember the exact gearing of my friends 525exc, but it was around 14/49 and he still had no trouble hitting 100+ in 6th. If you are regularly doing 70+ for 30+mins at a time, I would maybe think about it more, but otherwise, just take your friend's suggestion because it will give you a solid feel of the difference without needing a new chain.