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on an 04 what the stock gearing and chain size? and whats the best gearing to go with for drag racing also is the 520 swap also good
 

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I'm no dragracer, but I don't think going to the smaller 520 chain/sprockets would be a good idea for the repeated hard launches.
 

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I have stock wheelbase and I have the 520 conversion with Vortex sprockets and I run 15/39 and 16/39 gearing. I drag race as much as possible and even do a little street racing and haven't had a problem.
 

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Ruthless Racing said:
I have stock wheelbase and I have the 520 conversion with Vortex sprockets and I run 15/39 and 16/39 gearing. I drag race as much as possible and even do a little street racing and haven't had a problem.
See. Like I said, the 520 conv. will be fine. LOL :redface:

Shows what I know about dragracing streetbikes.
 

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the new 520erv3 is designed for liter bikes so it will handle the abuse much better than the older erv2 which was for bikes up to 750cc..
 

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I've got the ERV3 on my bike. And I've changed to 520 chain/sprockets on every bike I've had in the last nine years or so without a problem. But I do trackdays/roadracing where you don't get all the sudden jerks on the chain like dragracing.
 

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You guys that drag race on a 520 chain... I'm sure you do your chain maint. more often, and buy a damn good chain. Common sense, no matter what size chain you use, no keep up means it will break.

If you use a 520 for drag racing, you better keep a consitant maint. schedule with it, otherwise you could be replacing your cases.
 

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525 chain and a bunch of different sprocket combinations.I use 16/39 and 18/42 and 16/42 and so on and so on. 520 should be fine as long as your not making major horse power.
 
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