Vortex rear sprockets?

[Chris H]

Has anyone any experience of the Vortex alloy rear sprockets for the B4?anyone know if they are any good.
Of interest to anyone racing a B4 is that they list a 520 conversion that should give a little more power.

[mwheat308]

I don't have a B4 but, maybe this will help you.
I have had one on my 1200s for 10 k miles with the 520 conversion and it hardly looks worn so far.
I would say I am an average rider, mostly to and from work with small amounts of playing tossed in.
Mike

[Chris H]

Cheers Mike,
Should be good for the B4 then as you will be putting way more power throu it.
Hope they post to the UK!!

[PitterB4]

Vortex makes nice stuff.  I had one on the B4.  I don't remember if it was before or after the 520 conversion.

[Banditmax]

Aren't b4's always 520?

[Chris H]

Merry Christmas Bmax!
They are 525 as standard so will need a front sprocket to match? anyone know if the RGV250 will fit?

[tundrazach]

they list a 520 rear for the b4 but not a front, or 525 front for that matter..? I need a whole new set on my project bike, as the front one is worn to hell and has stress fractures, and the rear is hooking too.

[Banditmax]

I cant find a 520 out there anywhere for the front,

[Chris H]

Gsxr 250 Rk (GJ73A) 1989 or Gsf 250 (GJ74A) 92/96 are 520.
Same center at 19.5/22mm with 13 splines- Dont know what the standard amount of teeth is tho! and you will have to use a washer to take up the thickness difference.

[gsxr400 racer]

this is a common sprocket I got mine from JT sprockets and some from sprocket specialist... Seems like a sv or rgv or gs500 search and you will find...520 only way to roll

[Chris H]

That was my first guess but they got 21.6/25mm centres so no good, the gsf/gsx250 were the only ones i could find or the DR sprockets are 520 but have a lip that makes them 10mm wide, could be machined back to 7mm but bit pricey.Emailed them and a guy there called Lee has been most helpful so will give one a go!

[PitterB4]

Yeah - the SV is a no-go for the front but does fit the rear.  Somebody used to have a front for the the B4.  Do a search...  I'm sure there's a post around here somewhere.