i have an intake cam lying around somewhere. How quickly you need the specs?

 

I have acquired a set, they just are not here yet. No real rush.....

 

Okay here's the pics and what I measured.

stock
a = 32.9mm
b = 25.16mm

yec
a = 32.91mm
b = 25.05mm

 

Thanks bro!

Mind if I ask how much they set you back? New or used?

Thanks.

I found a new set on the WERA board with 2 YEC head gaskets, 2 YES base gaskets and a set of YEC clutch springs for $500 shipped.

Kangaroo,
YEC made a few sets of cams for the 04-06 R1's, including standard lift cams, which your's obviously must be. There are SBK 04 cams, standard lift 04 cams, SBK 05-06 cams and standard lift 05-06 cams. The 04/05-06 cams will all interchange, however the specs are different.

I agree those do seem to0 be the stock lift longer duration set. I have the high lift ones and they are being installed at Lee's right now :rock

 

Kangaroo,
YEC made a few sets of cams for the 04-06 R1's, including standard lift cams, which your's obviously must be. There are SBK 04 cams, standard lift 04 cams, SBK 05-06 cams and standard lift 05-06 cams. The 04/05-06 cams will all interchange, however the specs are different.

 

yup standard lift, but don't know about the different duration.

 

Here's the cam specs for stock and both types of YEC as well as both versions.

Type
intake duration-lift in mm
exhaust duration-lift in mm

04-06 OEM stock
292-7.6
284-7.5

04 YEC SBK (70 suffix)
286-8.5
288-8.5

04 YEC standard lift (80 suffix)
288-7.6
288-7.5

05-06 YEC SBK (71 suffix)
284-8.9
281-7.7

05-06 YEC standard lift (81 suffix)
292-7.6
285-7.5