5/8 Offset Sprocket close to frame.

StreetfighterKz wrote:

My 5/8" sprocket runs extremely close to the frame on mine. I have heard about people taking the swingarm off and heating the frame where the chain rubs and then hitting those areas with a hammer to dent the frame just enough for clearance. Its not suppose to weaken the frame enough to notice. You might try that since you're in the mock-up stage. Just a thought.

Later, Doug

This is the way most have handled this problem for 25+ years. It is usually only the back frame tube that has an interference problem with a 5/8" offset sprocket. I personally cut a channel in that tube and welded metal back in. Either method works, I just wanted a neater way to do it but many race bikes have done it this way and it works fine...........mod

let me know how it goes.

as for heating the frame and hitting it with a hammer i have seen it done before but a lot of oldschool riders i know area actualy punping the frame out with a hydralic jack. my dad kz1000 ltd had this done to set up the 1200bandit extended rearend.

here is a pic of the swingarm being mached up before it was extended.

sorry here it is i had to resize it.

you can kinda see how close the chain is running to the frame but the pic isnt real clear.

The 530 and the 630 chain is the same width, it's the pitch that's different. If you have clearance problems with the 530 you can switch to a 520 setup which is much narrower (about 1/8 inch narrower) even with o rings but you must use a high quality chain. EK makes one that's extremely strong, the 520 RXO which could easily handle your horsepower.

Wicked_KZ wrote:

The 530 and the 630 chain is the same width, it's the pitch that's different. If you have clearance problems with the 530 you can switch to a 520 setup which is much narrower (about 1/8 inch narrower) even with o rings but you must use a high quality chain. EK makes one that's extremely strong, the 520 RXO which could easily handle your horsepower.

Is the 520 the same pitch as the 530, so I can run the same sprockets?

Is there a good 520 non o-ring chain out there? This may give me the clearance I need.

Didn't have a chance to work on it last night, I'll research the 520 chain and maybe go this route.

Thank you all for your time.

It appears that the 520 chain needs a 520 sprocket. I doubt I will find a 520 5/8 offset sprocket.

Looks like i'll have to clearance, and maybe consider a non o-ring chain.

Back in the day this was the ONLY way to make an offset sprocket & 630 chains work with a stock frame. Heat and beat,if it didn't work there would have been thousands of Kawasaki dragbikes that never went down the track.

I realize this is an old post, but I'm having the same problem. I have an EK 530ZVX2 quadra x-ring chain, and it's hitting my tire (barely clears frame). I running a 5/8" offset on front, 5/8" spacer on rear, 6" rim with a 180 tire. The outside width of the chain is over 1" due to the o-rings. I think the 520 and 525 chains are much more narrow, especially if I can find a non o-ring type.

Problem is, the manufacturers don't list the OUTSIDE width, which can vary widely even within the same chain size due to o-ring vs non o-ring.

Has anyone heard of a 520 or 525 offset front sprocket?

Does anyone know the OUTSIDE width of a 520 or 525 chain (o-ring or non) or a 530 non o-ring? I already have 2 new chains that I can't use and need to get some measurements before I add to my new chain collection.

Any help would be GREATLY appreciated! Thanks

Post edited by: 79MKII, at: 2007/11/26 17:25

Post edited by: 79MKII, at: 2007/11/26 17:38

I built mine with a 5.5" ZX9 wheel with a 170 tire in a ZZR1200 swingarm. To get the sprockets to line up, I used a ZZR1100 24mm offset front sprocket with a 1mm spacer behind it, with a non O ring chain. The chain is very close to the frame but never actually hit or rubbed.

Fossil wrote:

I built mine with a 5.5" ZX9 wheel with a 170 tire in a ZZR1200 swingarm. To get the sprockets to line up, I used a ZZR1100 24mm offset front sprocket with a 1mm spacer behind it, with a non O ring chain. The chain is very close to the frame but never actually hit or rubbed.

You are running a non o-ring 530 chain? Can you measure the outside width? That would be a huge help.

I was able to find the outside width - they have it listed as "pin length". Since the pins are the widest part anyway, that works. The bad news is I have some major work to do and thought I was done. Even the smallest 530 chain will not clear the tire and I can't find an offset front sprocket for a 520 or 525 chain. I could be in trouble here with my back wheel:( I'll start a new post when I get some more facts and pictures. Thanks for the help.