Rick Lee

I just noticed the rear or outermost v-belt is about to break. It's about 30k miles old. At the time I replaced them probably six yrs. ago, I bought some extras, I think from Pelican. But now I have three different makes and they all look the same, but with slightly different dimensions and part numbers. I have:

Contitech - AVX10x775
Porsche - 999 192 338 50
Rofan - 10x760

The Porsche and Conti belts appear to be the same diameter, but the Porsche belt is slight narrower, probably 9.5mm and has more and smaller inner teeth. The Rofan appears to be a tad smaller in diameter, but same width as the Conti. Its inner teeth are larger and fewer than the Porsche, but smaller and more numerous than the Conti.

The inner v-belt and a/c belts look fine, just need to do the outermost one now. Which one is best?

kjr914

30k and 6 years? Its time to do ALL the belts. Also, getting the AC belt off/on is the real time sink, so you want to do them all at once. Furthermore, if ANY of them break, they can easily take out one or both of the others in the process. New belts = cheap insurance.

Grabbed from Pcarworkshop.com (and edited for clarity):
999 192 338 50 inner-fan belt 9.5 x 776 mm
999 192 343 50 outer-alternator 9.5 x 760 mm
999 192 363 50 A/C compressor belt 13 x 1083 mm

The collective wisdom of RL seems to point to using only PORSCHE belts due to sizing/slipping/earlywearout issues (YMMV) with other brands. Contitech does make belts for Porsche, so you will see their name on PORSCHE belts.

mhm993

Use factory only. Can't explain it, but a number of us have found the other brands don't last in our cars. I've had repeat problems with the conti's in the yellow cardboard, so there's something different about them from the oem.

Rick Lee

Ok, I'll use the Conti for now and it should hold until I can round up the factory one at the stealer and redo them all. I have the Porsche parts for the other two belts. Just had a shipment from Pelican delivered today, but didn't know I needed to order this one when I called in. Damn.

Rick Lee

Ok, just did this, decided too swap all three, since I have two of the correct ones and one that really needed it was only 0.5mm too wide. I just added a shim to compensate for that, also added a shim for the innermost belt, since it had always felt tight. All feels a lot better now, though I'm grabbing the right belt from the stealer today.

e9stibi

Give sunset a call to get factory ones. With the discount, they are typically less than the Conti.

Rick Lee

Got it locally today, as I can't afford to get stuck. My bike is down now too, so I have to keep the 993 on the road. This is what she looked like earlier today.