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Buellistic
| | Posted on Friday, April 25, 2008 - 10:31 am: | 
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Good "THINKING" Hugie03flhr !!!
Early on to the best of my knowledge ZIPPERS was the only place you could get a
"R" type oil pump drive gear ...
Before the end of the "TUBE FRAME" Model run there were engines the ate the oil pump drive gear, also early XB engines ...
"SO", BMC/H-D caught on they had a problem and from 2006 on XB engines have this
-06 gear in them ...
The easier correction as a MECHANIC would say, "RUN THE PRIMARY CHAIN WITH 3/4 INCH
PLAY on the CHAIN TIGHT SPOT !!!"
Even with the -06 oil pump drive gear, "i" would still run the primary chain 3/4 inch play on the chain tight spot ...
That is what "i" have done in the 103,184.5 miles on my engine, which still has the -88A gear which is coming out this week end ...
Scott_in_nh some -??R(racing) parts make a every day ride last longer ...
As in oil pumps, the -91 was first
up-graded -98(BMC part number)and -91A(H-D
part number) then to H-D/BMC -02B which is a H-D./BMC part number used in BMC XB engines(do not know about Sportster engines) ... |
Sloppy
| | Posted on Friday, April 25, 2008 - 07:38 pm: |
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Scott:
The logic is:
Why change something that isn't going to fail... especially when it's so easy to check!
From Hugh's description he hasn't torn into the engine yet... nor does he even have the tools?
The illogic, therefore, would be to change it out when it doesn't need to be done...
MOST bikes do not suffer from this condition -- my local mechanic says the ONLY bikes that he sees with this condition is when they are regularly used for drag racing, and they were are ALL caught before there was impending failure.
Mine looked fine after 30,000 miles and LIKELY so does most everybody else's (and I'm not easy on the bike either!).
I think the rate of failure is far exaggerated but some like to change it for peace of mind, which is understandable.
YMMV -- just sharing information. |
Scott_in_nh
| | Posted on Friday, April 25, 2008 - 08:50 pm: |
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I appreciate your opinion Sloppy here is mine:
I agree that the actual failure rate is probably low. So if you do not HAVE to take the gear cover off it is best to wait until it needs replacement.
That said, the failure rate was not so low that the factory ignored it, so why should we?
I'm as tight on money and time as the next guy (divorced with 2 kids), so I like to spend both in the right places.
While I agree that the inspection is easy, the replacement is very time consuming the 1st time you do it.
Having taken off the gear cover to replace a leaking gasket, you could not pay me the cost of the gear and tool (what $50 for the gear and $34 for the tool for a total of $84?)to do it again.
The piece of mind that comes with having replaced it has its value too and I am not spending any more time doing the inspection - ever! |
Blake
| | Posted on Saturday, April 26, 2008 - 03:05 pm: |
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I know of quite a few folks who don't drag race but who have experienced failure of the oil pump drive gear. It ain't pretty.
But I wouldn't replace unless a visual inspection looking up through the oil pump hole reveals a problem. |
Hugie03flhr
| | Posted on Saturday, April 26, 2008 - 06:28 pm: |
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You all have very good points. I'm a pretty good wrench so for me to tear into it isn't that big of a deal. even though I may sound like a rookie. I have punched out and cammed my softail, built more V8s than I can count and every other engine in between. I reach out to you guys so I don't have any surprises!!! This is my first Evo sportster I plan on opening up and I may even change the rocker while I'm their My co-worker gave me a set of roller rockers w/ shafts and they are 1.75 ratio. Have any of you used high ratio rockers on a M2? I think the lighting cams maybe too high of lift for this ratio rocker. THANKS FOR READING BILL |
Hippyjoe
| | Posted on Saturday, April 26, 2008 - 11:48 pm: |
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If you're working on an M2 I'd recommend the SE bolt-in/Lightning cams and the OPD gear. That way you're going in there for more than one reason. Others have bolted in Andrews cams with varying degress of ease.
Here is a link to the procedure with crappy pics.
http://www.badweatherbikers.com/buell/messages/384 2/222993.html?1158851464 |
Hugie03flhr
| | Posted on Sunday, April 27, 2008 - 09:06 am: |
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Thanks Hippyjoe, but I still have those high ratio rockers sitting around. What do you guy's think? Use them or make them a paper weight? |
Hugie03flhr
| | Posted on Sunday, April 27, 2008 - 09:09 am: |
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Hippy, Thats a nice pic of the oilpump gear THANKS |
V74
| | Posted on Sunday, April 27, 2008 - 09:44 am: |
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i would love to put a set of high ratio rockers in my 99 M2,install them or send them to me  |
Hugie03flhr
| | Posted on Sunday, April 27, 2008 - 12:40 pm: |
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V74, if I don't use them I'll give you a price you can't refuse. . Since no one has jumped in that has install high ratio rockers, I guess I'm going to be the test dump Does anyone have the lift specs. of the M2 cams? I don't want too bind the springs. |
V74
| | Posted on Sunday, April 27, 2008 - 03:19 pm: |
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US M2,s use sportster cams,UK M2,s use the lightning cams,high ratio rockers will give aprox 1mm extra lift,about the same if i went from my lightning cams to .536 se cams,you should get no coil bind,while in there i would replace the steel pushrods with alloy ones,save you about 160g on the valve train,their cheap to,just check rocker box clearances to be on the save side after install but should be no problems. |
Hippyjoe
| | Posted on Sunday, April 27, 2008 - 07:24 pm: |
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I don't know about hi-lift rocker arms. You could check the KV or call Al Lighton or Nallin's, they would know.
If they fit a stock M2 setup as V74 says they might, then you might save $300 on a new set of cams while getting a performance boost.
One reason I changed my M2 cams was that some ppl reported failure in these. It's in the KV. About as rare as the OPD gear failure but still has happened more than once. Worth thinking about.
Here is a link to Sporty cam specs.
http://www.nightrider.com/biketech/camxlbyman.htm |
Buellistic
| | Posted on Sunday, April 27, 2008 - 07:51 pm: |
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Sorry, had a death in the family ...
Out of town now ...
Will do OIL PUMP DRIVE GEAR and "INFO" when "i" return !!! |
Hugie03flhr
| | Posted on Monday, April 28, 2008 - 08:53 am: |
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Sorry too hear that! God Bless! |
Oldog
| | Posted on Monday, April 28, 2008 - 01:40 pm: |
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Sorry to hear this Lafayette
I look forward to your writeup. |
Werewulf
| | Posted on Monday, April 28, 2008 - 02:33 pm: |
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sorry for your loss... |
Clarkjw
| | Posted on Friday, July 18, 2008 - 02:19 pm: |
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I have a brand new Oil Pump Drive Gear, which I won't be installing after the processes described. Best offer is welcome to it. Retail is $45. |
Reepicheep
| | Posted on Friday, July 18, 2008 - 04:04 pm: |
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Is it the new gold racing one, or the old style one?
I have a bunch of pictures from Lafeyette that I need to post! |
Clarkjw
| | Posted on Friday, July 18, 2008 - 11:26 pm: |
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The new gold one.
[IMG]http://www.Buell Parts/images/products/firebolt-proseries-high-performance-oil-pump-drive-gear.jpg[/IMG]
(Message edited by clarkjw on July 18, 2008) |
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