Draxsonimy
Well-known member
- Joined
- Oct 27, 2011
- Messages
- 465
I hate mileage. I think hours are a little better but still doesn't state how long and what rpm range.
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life of engine
- Thread starter bcbull4
- Start date
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devonbiker
Well-known member
- Joined
- Jul 26, 2013
- Messages
- 167
Some of these mileage's quoted makes my 11000 seem like I'm still running it in 
user_deleted
Well-known member
Captain Touchy-Feely: if you're going to criticize others on here at least use the correct vernacular. the term "japbikes" and racism have no correlation whatsoever. the term could possibly be construed as denigration towards the japanese. but racism? wrong.
30K on my 07 12s and im in the process of doing the pinion shaft bearing.
based on my investigation, I believe for some reason there were a batch of rollers that got into our bikes that were prone to failure. i noticed the hard chrome plating on them had begun ti flake off on the interior portion or the rollers. it didnt happen to all of them. just about half of the cage. because of the decreased OD of teh rollers with the faulty plating, the bearing cage was allowed to rub on the outer race causing damage to about 1/3 of it where the power stroke puts the most pressure. there is a procedure to line lap the outer race, then fit oversize rollers but due to the damage to my race, lapping it would have brought it out of the maximum OD to clean the damage. so ill have a new race and bearings to fit. its important to get it right because there needs to hold a .0002" tolerance on the sizing.
I ruled out any oiling issue due to the fact there was absolutely no out of spec wear on ANY other bottom end part. even valves and seats were near new (which says really nothing for the oiling system). (IIRC valve seat area wear range is .040-.062 and i was just .004-.005 over the min)
transmission is near perfect, oil pump gear, cam gears, original clutch, belt, pistons, jugs, etc.
im doing both crank bearings and installing a balanced, lightened, and welded crank. so my plan is to never have to do the bottom end again.
the pinion shaft rollers, you can see some are damaged, some are near perfect:
damage to outer race:
based on my investigation, I believe for some reason there were a batch of rollers that got into our bikes that were prone to failure. i noticed the hard chrome plating on them had begun ti flake off on the interior portion or the rollers. it didnt happen to all of them. just about half of the cage. because of the decreased OD of teh rollers with the faulty plating, the bearing cage was allowed to rub on the outer race causing damage to about 1/3 of it where the power stroke puts the most pressure. there is a procedure to line lap the outer race, then fit oversize rollers but due to the damage to my race, lapping it would have brought it out of the maximum OD to clean the damage. so ill have a new race and bearings to fit. its important to get it right because there needs to hold a .0002" tolerance on the sizing.
I ruled out any oiling issue due to the fact there was absolutely no out of spec wear on ANY other bottom end part. even valves and seats were near new (which says really nothing for the oiling system). (IIRC valve seat area wear range is .040-.062 and i was just .004-.005 over the min)
transmission is near perfect, oil pump gear, cam gears, original clutch, belt, pistons, jugs, etc.
im doing both crank bearings and installing a balanced, lightened, and welded crank. so my plan is to never have to do the bottom end again.
the pinion shaft rollers, you can see some are damaged, some are near perfect:
damage to outer race:
go cytocis
Well-known member
- Joined
- May 28, 2012
- Messages
- 1,829
I've observed that the engine oil in my XB blackened much quicker than I'm accustomed to with a Japanese motor, or modern German motors. To the extent that this may indicate that the XB has increased combustion blow-by, which in turn may indicate larger manufacturing tollerances, it may be reasonable to conclude that, all other things being equal, an XB motor may generally not last as long.
This sure doesn't discount the possibility of reaching well over 100k on an XB though!
This sure doesn't discount the possibility of reaching well over 100k on an XB though!
It's air-cooled for one thing. Therefore, there is more clearence in piston to cylinder wall, especially when it's cold. When it's cold, the EFI is fueling the shit out it. Also, comparitively speaking, these have a huge bore compared to your I4 bikes. A leakdown on one of these engines (hot), is NO higher than any other performance based engine....jap I4's included. (I've heard of guys down around 3%. I haven't seen that, but can see it being feasible).
go cytocis
Well-known member
- Joined
- May 28, 2012
- Messages
- 1,829
Yup, agreed!
Agreed, but because of the XB's relatively loooong stroke however, it's bore is actually quite a bit smaller than on an old Honda VTR I had, and even my little BMW 650 thumper, both of which will still flow honey-gold oil out of the drain plug after many thousands of miles.
I have 56k on my R6 today ... and it's a stunt bike so it gets beat on every time I ride it (and by beat on I mean constant wheelies and up around the top quarter of the rev range for most of it's run time) ... no complaints except for one ground wire that broke on the cheap little universal headlight assembly I fitted to it and a bad coil ... My 954RR has almost 40k ... and it is my track bike ... that's hard mileage that's mostly towards the top third of the rev range constantly ... no complains except for a melted ground block (common fail item on their wiring harnesses) and a few snapped chains ... My 919 had 90k on the clock when I sold it ... still ran like the day I bought it with about 23k miles on it and not one single thing broke on that bike the 3 years I had it (believe it or not) ... Hell my XB has 21k on it's clock as of about 4 hours ago and it sat on it's side in a shed under a damn tarp with a broken frame, cracked primary cover, and a rashed through swingarm with about 11k miles on it's odo when I took it off the PO's dad's hands ...
Don't let anyone tell you a motorcycle won't last past 30k or something like that ... I'm here to tell you that's absolutely not true as long as the bike is kept up ... with proper maintenance, your bike live a loooooong and happy life ... and by proper maintenance I mean doing all of it ... not just the easy stuff ... These bikes are much tougher than people give them credit for sometimes ... These modified EVO motors have their quirks but are overall a pretty good design ... and a lot of the aggravating maintenance you have to deal with on an I-4 motorcycle is eliminated for you (time consuming valve adjustments and messy chain cleaning/lubing/tightening just to name a couple that aggravate me) ...
P.S.
UMDterp13 .... That is some great mileage on that Uly man !! ... Glad to see somebody put some serious proof to what I've just said out there ... And I did see that CBR600F4i with 250k+ on the odo on the cbrforums a while back ... I don't frequent that forum that much anymore as it's not nearly as nice/intelligent of a crowd to deal with as on here ... Much better folks in the Buell community to associate with ...
Don't let anyone tell you a motorcycle won't last past 30k or something like that ... I'm here to tell you that's absolutely not true as long as the bike is kept up ... with proper maintenance, your bike live a loooooong and happy life ... and by proper maintenance I mean doing all of it ... not just the easy stuff ... These bikes are much tougher than people give them credit for sometimes ... These modified EVO motors have their quirks but are overall a pretty good design ... and a lot of the aggravating maintenance you have to deal with on an I-4 motorcycle is eliminated for you (time consuming valve adjustments and messy chain cleaning/lubing/tightening just to name a couple that aggravate me) ...
P.S.
UMDterp13 .... That is some great mileage on that Uly man !! ... Glad to see somebody put some serious proof to what I've just said out there ... And I did see that CBR600F4i with 250k+ on the odo on the cbrforums a while back ... I don't frequent that forum that much anymore as it's not nearly as nice/intelligent of a crowd to deal with as on here ... Much better folks in the Buell community to associate with ...
Sometimes you just have to go out there and PROVE them wrong!! ANY 2-lane blacktop with twisty-turnies in it will set them straight!! Lol!!
And.... in all fairness....they are NOT apple for apples. I'm an engine guy.....and this comparison is VERY similar to comparing an old 390 or 428 Ford to the new Coyote engine. Our engine ARCHITECTURE dates back to the 50's....hell....the Japs were still dusting themselves off from getting their asses whooped back then!! Buell's slogan WAS..."DIFFERENT in Every Sense". There is a reason for that. The Buell has an undeniable sense of character that will NEVER come from any jap sportbike. That's NOT to say the CBRRRRR's don't have a place....they sure do. I am one of many who enjoy the XB bike for what it is....you either like it or you don't. Some guys like their big block Chevelle's all cammed up with large headers....others like their Honda Civics with a fart pipe. There just IS NO comparison!!
