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Discussion Starter · #1 ·
so the stock is a 14.. if i went up one to a 15 would stock chain b ok? i went with a 15 on my rappy 350 but needed a longer chain..
 

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There isn't alot of clearance for a bigger sprocket on the XX. I'm not even sure it's possible? I am curious to know if it will even work?
 

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Yes it works, I'm running a 15 right now, have to take the case saver off thou, thinking of going to a 16 if i put 20s in the back next.
 

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Discussion Starter · #5 ·
n r u still running the stock chain with ur 15t
 

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Yes the thing with the 2 bolts is the case saver and yes it works with stock chain.

I was running the 13 for a while, it was ok i guess, but seen a dude with a 700r that smoked me and my friends 700xx's and he had a 15 on, so i figured I would give it a go, and never looked back, to me it woke the bike up, I know I'm hitting somewhere in the 80s with it.
 

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The case saver will still fit with a 15 tooth sprocket but has to be removed for the install and held in place while remounting
 

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Go down in size on the rear sprocket is the same as going up on the front sprocket....don't ride w/o that case saver unless you got a pocket full of money for new cases. If that chain breaks, you're in deep $hit!
 

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Discussion Starter · #10 ·
yea i didnt think about that mayb that way is a lil safer lol
 

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Thanks for letting me know, I was'nt even aware of the case saver fitting back on with the 15T, if i went with 16 I will have to mod the case saver to work most likly.
 

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Phucknutz run a 15t and someone (Can't remember) ran a 16t frontsprocket. I'll try and find it .

RaVxX , what motor you running ?
I remember smoOoth1 saying a 15t on front is a no go with a stock motor.
From expierance the stock motor struggles with a 14t. Even with 20"s on. :D
 

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I just have the FMF Speed, PC3 for engine mods, my engine dont struggle at all, it pulls up 1st and 2nd, and it wants to come up in 3rd, it struggled with the 13T on, but not with the 15T, I have no idea why, unless its the weight of the tires I run in the back, I run 4ply 21x12x10s Mudsharks.
 

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im running a 15t front and a 35 rear (had to order a 35t blank cut the centre to fit) i run the stock chain, i found the 15t realy struggles to top out 5th tho, i run it caus where i was riding was big uneven pain in the arse whops and found the 15 35 stopped it from lifting the front end too much through the whops,

With what ravxx was saying about it waking the bike up, i found it also to pull harder through lower rpm rather that wheel spinning,

i modified my case saver just by grinding a bit off the inner curve to give it a bit of clearance,
 

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im running a 15t front and a 35 rear (had to order a 35t blank cut the centre to fit) i run the stock chain, i found the 15t realy struggles to top out 5th tho, i run it caus where i was riding was big uneven pain in the arse whops and found the 15 35 stopped it from lifting the front end too much through the whops,

With what ravxx was saying about it waking the bike up, i found it also to pull harder through lower rpm rather that wheel spinning,

i modified my case saver just by grinding a bit off the inner curve to give it a bit of clearance,
Man i bet that thing cranks with that gearing, but mine spins yet and still can stand it up in 3 gears, but i didnt gear the back sprocket yet, Iam only going down a tooth or so in the back if i dont get the 16T front.
 

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yeah it goes well enough to put me in hospital a couple of times, its not as much fun now caus i had to give my foxx evols and podiums back to my sponser when i moved towns so it back on orignal shocks, with the rear sprocket i dont know if they are avail yet, caus i couldnt find any when i did mine, but a 35t blank is easy to get cut aslong as you know somewhere that has a lazer jet or a water jet, just take them the blank and your 37t and ask them to make the centre the same
 

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OK , heres something to pick ya brains with. I have read that going with a 15t front on a stock motor is a no no. I doing a dirt track event (300 metre oval) and was wondering about trying it and only use up to 4th gear . Using 18" tyres on the rear and thought this might be a maybe ?
Basically tryin to make 1st gear the same ratio as 2nd gear.
 

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Baxter if you are wanting to make 1st like 2nd and then not run 5th,,,,,,,,,,,,big pause,,,, why?

Why not just pull out in 2nd?

which with 18's you should be able to get 5th on 300 meter oval
 
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