sprocket change will I need a new chain?

[chucky]

My wife rides a 2007 ec200 I want to change the std 13/48 gear ratio to 13/51 , will the std chain be long enough or do I need to get a new chain ?

[HuskyDude]

Don't think so but it depends on how stretched your chain is now. If it's really bad, it might just fit...but that just about means it's time for a new chain. I ran two masters and an extra link before while winter riding without a problem, but I guess it's not recommended.
Most chains come in 120 links (I think) you might want to invest in a chain breaker and do it yourself. Or count how many links you'll need and your bike shop will most likely break it for you...just make sure you buy the chain from them.

[marjastaja]

Maybe the chain is long enough but if you put old chain on new sprockets, sprockets wear out pretty quickly. So I recommend that you buy new chain for new sprockets

[chucky]

Originally Posted by marjastaja

Maybe the chain is long enough but if you put old chain on new sprockets, sprockets wear out pretty quickly. So I recommend that you buy new chain for new sprockets

Its new , only ridden it twice

[JRDoz]

Originally Posted by chucky

My wife rides a 2007 ec200 I want to change the std 13/48 gear ratio to 13/51 , will the std chain be long enough or do I need to get a new chain ?

Where is the axle sitting on the swingarm ? Is it forward ,middle or towards the rear position.. I fitted a 50T sprocket to a chain I was using a 48T on with no problems..

[ggg]

Fit a 12 tooth same as 13/51 and you know it will fit. after that's stuffed go out and get the 13/51 chain sprocket setup.

[geoff g]

I would stay with the 13/48 on the 200 as going up on the rear will not give you the results that you thought it would, I tried a 50t and then a 52t and hated it, went back to the 48t which holds a gear way longer. If you want more snap change the muffler to a DEP and get the jetting right...all good.

[Nick]

Stock GG sprockets and chain are very good in my opinion and i would just gear according to your needs. I have two sets of wheels and am still on stock chain and sprockets on both sets after several thousand miles of races and riding.

[Eric K]

Originally Posted by Nick

Stock GG sprockets and chain are very good in my opinion and i would just gear according to your needs. I have two sets of wheels and am still on stock chain and sprockets on both sets after several thousand miles of races and riding.

Several thousand miles on the stock front sprocket?

My stock front sprockets start to hook at 800 to 900 miles. This is about how many miles I get out of Sprocket Specialists front sprockets as well.

In comparison on my '01 XC300 the front Ironman sprocket is just starting to hook at 2200+ miles.

My '06 EC300 front Ironman looks good at 1900 miles.

Ironman sprockets are a great value for me, with well over twice the life.

[GMP]

51t should be OK with stock chain. Your axel will be forward of center, so check for tire/mud flap contact, depending on the tire your running. I once made that mistake with this combo and a trials tire on my '03 and chewed through a mudflap in one ride.