| Author | Message | ||
     Buellracer01 |
I can't figure out how to post pictures on here, I've been tearing down my '01 X1 for oil pump drive gear replacement and my service manual says that my cams should have "15" followed by 1,2,3, or 4. My cams are numbered 1-4 but have a capital B stamped in front of that number instead of 15. These are the cams that came from the factory in the bike. Any insight is greatly appreciated before I time this motor and bolt it back up. | ||
| Scott_in_nh |
Those are the correct letter/numbers and are the same cams I have (had) in my 99 S3. | ||
| Buellracer01 |
 | ||
| Buellracer01 |
Wonder why the discrepancy in the manual saying the cams should have 15 on them instead of the B I have though | ||
| Scott_in_nh |
Sorry, I gave you the wrong information -I've been looking at too many cams and forgot what I started with.  My 99 S3 cams are 15-1, 15-2, 15-3 and 15-4 Sorry to add to the confusion | ||
| Kilroy |
that does not look like a stock cam lobe profile..... | ||
| Imadog |
To me it does not look like the teeth are cut at the same profile. | ||
| 1313 |
I think I have resolved this, and it is exactly as I was speculating earlier this week when I first saw this thread. First off, if you recall high contact ratio cams were introduced for 2001:  The 'high contact ratio' was in reference to how the gears meshed only. The cam profiles were not changed. But further research on high contact ratio cams and their benefits can be done by those interested. It seems about 10 years ago, someone else had this exact same question. My suspicion is that H-D Tech Pubs, even though they included the blurb about the model year change to HCR cams, did not update the information related to how the cams were identified. This seems to be the exact same thing Lemonchili_x1 stumbled upon nearly 10 years ago. With all this said, I believe that these are the original cams for an '01 X1 (and '01 S3/S3T). The '15-' cams would be for 2000 and before T-Storm engines and are non-HCR cams. If it were me, I'd put them back in and run them - if that's what you want to do. Although my personal suspicion (COMPLETELY UNPROVEN BY SCIENTIFIC DATA, mind you...) is that there is a link to HCR cams and oil pump drive gear wear. So, I'd be sure if I were using these cams that my oil pump drive gear is either fine as is, or for a little better peace of mind, upgraded to the bronze/updated part. Again, this is only what I've surmised without any hard data. HTH and doesn't confuse things further, 1313 | ||
| Reepicheep |
My 2000 M2 was a oil pump pinion drive gear serial killer, and it used the old sporty cams. | ||
| Buellracer01 |
Yes sir, I'm replacing the oil pump drive gear as we speak. It was my only reason for diving into the crank case though I was surprised my stock gear looked great with 13,000 miles on it | ||
| Screamer |
At one point a switch was made from the vendor supplied SE cams used in the early Lightning and T-Storm tube frame motors (marked 1 thru 4 "dash 15") to cams that were produced "in-house". I'm not sure when the change took place or what the new marking may have been., but it may coincide with the pinion change and may explain the "B" marking. | ||
| Phelan |
Interesting the Buells switched to HCR cams in '01, as Sportsters switched to HCR cams in '00. Then again, not much different than the '96 S2 and S2T using '84-'95 HD switchgear, as HD switched their bikes to the newer round profile switches in '96. The high contact ratio cams are only desired by those that want less noise. The old style is stronger. Red shift doesn't even like to out their grinds on HCR cams because they are structurally weaker and the pinion gear can actually break in high performance applications. | ||
| Screamer |
Buell engines went partially to HCR in 2000 - by using the HCR pinion and driven gear (on the rear intake). | ||
| 1313 |
Makes mention of 'B' cams identified as such. The truth is out there, 1313 | ||
| Screamer |
Good find! | ||
| Screamer |
Found some old notes and papers - looks like the B marks were introduced mid- year of 2001 model year. Same lift and duration as the cams marked with the 15. | ||
| Buellracer01 |
That's awesome news! Thanks 1313 and Screamer! | ||
| Ft_bstrd |
Why do XB cams rotate backwards from XL/Tuber cams? What was the advantage of doing this? |
