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428 Gearing Options..?

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BBR-rear sprockets -54,55,57 front sprockets, 14-16

renthal sprockets -rear, 59-61, front sprocket ,16 tooth in that kit

sprocket specialists- rear sprockets, 39-74, front sprockets ,12-16

sidewinder has a wide range of sprockets also

all 428 sprockets

hope this helps you out

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BBR-rear sprockets -54,55,57 front sprockets, 14-16

renthal sprockets -rear, 59-61, front sprocket ,16 tooth in that kit

sprocket specialists- rear sprockets, 39-74, front sprockets ,12-16

sidewinder has a wide range of sprockets also

all 428 sprockets

hope this helps you out

I thought there were quite a few out there.

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I hate when companies say there product does something unlogical. Side winder says it adds almost 3 horsepower? How is that possible?

if the power is measured at the rear wheels it can change as the gear ratios change, but 3 does sound a little bit high.

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if the power is measured at the rear wheels it can change as the gear ratios change, but 3 does sound a little bit high.

I guess that can be a possibility.

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Actually the performance increase would be from the lack of parasitic loss.

Imagine that an o-ring chain on a 12hp CRF150 is like trying to go swimming with an anchor on your leg.

By going to a standard chain, with less friction, allows more hp to get to the rear wheel instead of being eaten up by alllllllll those o-rings!

But 3hp does seem like a lot. Though I will say going to a non o-ring chain on my bike was a huge performance increase.

Mike

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non o-ring low drag chains.increase hp at the wheel.....less energy wasted turning the chain....alum sprockets-lower rotational mass and lighter.....428 less weight.....lower rotational mass...and lower surface area friction....but 428's wear out alot faster and stretch more and not as strong,....for long distance trail riding i use a non o-ring low friction racing 520 with an alum alloy sprocket.

the 428 will get power to the ground faster and prob add some rear wheel hp.. but its a dependability trade off...its kinda small to be depending on 20 miles from camp.....and i think 3 hp is bs considering a bb kit only adds 4-5.....but i bet they sell plenty based on that claim.

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Not sure if it is a horsepower gain or not but I know that with the OEM chain (o-ring) on the OEM gearing when I put the bike up on a stand and spun the rear wheel by hand. The wheel would spin just past one revolution. This was a warm, properly adjusted and lubed chain. When I switched to the non o-ring 428 chain and sprockets it spun considerably longer. Riding the bike I felt that the bike rev'ed quicker and rolled further when I pulled in the clutch. Agani, Horsepower gain; eh. Less rolling resistance and possibly a little weight savings; certainly. My opinion is it's a more efficient delivery of the existing HP. I run it, I recommend it.

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this is all true....but just going to a alum sprocket.and non oring chain helps alot.as well...and its stronger.....i guess it depends on the kind of riding you do as to whether the 428 is a practical mod.....as a rule the 428 on my ttr gets replaced twice as often as my 520's...and it lighter and has less hp....since these bike are not competition bikes , i like to keep them as maint free as poss,..

but it def. will have less drag with the smaller chain.

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I will be switching to a non o-ring chain if I can find something to get this front sprocket cover off:banghead: .

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I will be switching to a non o-ring chain if I can find something to get this front sprocket cover off:banghead: .

Uhh? A wrench worked just fine for me :prof:

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Uhh? A wrench worked just fine for me :prof:

your killin me here.............lol:worthy: ..............wait till he tries to find the master link on that oring chain.....crf dude you have over 1600 posts in like 3 months..not trying to be mean but......but if youre posting that much you should be able to take than bike down and put it back together again......you can read a million posts and write a million....but until you actually work on your bike, you wont learn how to do anything...turn your computer off...go out in the garage....put your bike on a stand and do a couple of simple tasks on the bike. then, come back and someone will tell you how to do another....3 months from now youll have far less posts.but you will actually know how to work on your bike...these posts are all about

helping others and sharing....learning from other riders experiences and hard work...and its a gold mind of info. but at some point you have to be willing to help yourself as well......we all had to start somewhere.....but this forum will only lead you to water........whether you drink or not is entirely

up to you......till you make that jump, id leave the o-ring chain on......itll last 3 times as long as a standard chain....and the more you mod it , the more maint youll have to do.

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I've been going in the garage and working on my bike. I just cant find anything to fit down there. A ratchet wont work and some wrenches get caught in the top. I can get the top off but I can find anything to get down on the bottom.

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its and 8mm if memory serves me right...the bikes all metric....your using an english standard size....you need a set of metric sockets and wrenches...

if i might ask...how old are you?...and do you have anyone there that can help you? do you have the new chain already? ARE YOU SURE ITS THE RIGHT LENGTH? my reason for asking is if your real young, its always nice to have someone to help you the first time you do things , but not a must! also that o-ring chain doesnt come off like a standard chain does...it has to be removed by a chain tool to seperate it, or you have to grind the link down and seperate it with a screwdriver. the new standard chain will go on easy because it goes together with a clip type master link which needs the closed end of the clip facing the way the chain rotates.if you dont have a grinder or a chain tool you wont get the old chain off......make sure you have a 520 chain the correct length as well or you will be all dressed you with nowhere to go.

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