all this talk about bearings...
I wonder if there is anybody out there who has performed "Line Boring" on the air Cooled VW engine cases.
Someone who has done this and also split the cases on a goldwing would have the experience to answer some questions
I wonder if the goldwing cases could be line bored to fit some other bearings.
I wonder if the goldwing crank journals could be turned down to fit some other bearings?
Timothy Mark Fisher
Catalina Arizona
"ride it.. don't be one of those guys who will fix it 'til it's broken" (JDVorchek)
"It is not logic or economics that drive a motorcyclist but passion!" (bugdaddy66)
"I fully agree with fish, well at least 27% of the time."(Casper)
"Why do you have to ruin a perfectly good thread with common sense"(Placerville)
"my best guess for an answer would be a stream of complex expletives" (Transitman)
"I like a cold beer with my beer" (OldeWing)
"Most of us like the sport of wrenching too." (fred camper)
"Now go ride the heck out of it, til mother says do your chores"(Gowing)
"I agree with Fish" (Salukispeed)
CYBORG wrote:My understanding is that the goldwing cranks can not be turned
I've heard this too but never an explanation as to why. If it is a hardness thing then some machine shops could retreat the crank after it was turned.
As to fish's question, it mostly depends on how much material is in the case/crank to start with and how much you would need to remove. You would have to find bearings first and then go from there. And the cost would start to add up.
But, then you have to think about the rod bearings too. Those also take different bearings depending on the code on the crank and the rod. You could again turn the crank journals and resize the big end of the rod. After finding bearings first again. But there goes that cost thing again. Way down the road this may be what we "have" to do.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
Honda had the best machining facilities in 1975 but I bet if we apply some 2015 CNC & some engine-uity the mains and rods could be turned/resized/line bored to some bearing that IS availiable
In the meantime I think I will go and put a tachometer on WarBird
Timothy Mark Fisher
Catalina Arizona
"ride it.. don't be one of those guys who will fix it 'til it's broken" (JDVorchek)
"It is not logic or economics that drive a motorcyclist but passion!" (bugdaddy66)
"I fully agree with fish, well at least 27% of the time."(Casper)
"Why do you have to ruin a perfectly good thread with common sense"(Placerville)
"my best guess for an answer would be a stream of complex expletives" (Transitman)
"I like a cold beer with my beer" (OldeWing)
"Most of us like the sport of wrenching too." (fred camper)
"Now go ride the heck out of it, til mother says do your chores"(Gowing)
"I agree with Fish" (Salukispeed)
Don't bother with the tach. You know you're going to ride it until it quits pulling and then shift, anyways. LOL.
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
Interesting idea, I agree the starting point would be finding bearings to work towards. As far as line boring the case, I see no real issue with it, although there of course would be no specs on how far to safely go before weakening the crank support system. Having line bored many VW cases, I am use to the plethora of bearing sizes available, but don't know of another engine with that kind of bearing availability in Goldwing journal sizes.
Todd Logan (Bugdaddy66)
"Never argue with a moron, they'll always drag you down to their level and beat you with experience."
1978 GL1000 Daily commuter (SOLD)
1981 XS650 Hot Rod play bike (SOLD)
2003 BMW F650CS (Wife Bike)
2009 BMW R1200RT
Meant to say if the ID of the bearing was correct but the OD of the Babbitt was too big he could line bore the mounts to a certain point to mount the bearing and still fit the crank. I'm not a machinist and I've never tried to track down GL bearings. Seems there are plenty of donor engines with good cases and cranks if yours is no good.
CYBORG wrote:My understanding is that the goldwing cranks can not be turned
I think he is talking about line boring the new bearings to match the crank. Not the other way around.
Nope, Fish said, "I wonder if the goldwing crank journals could be turned down to fit some other bearings?". Along with line boring the cases.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
Should we as a group start collecting a bunch of the old shells, if worn but not damaged that could possibly be relined with the copper and soft/Babbit like material. At least they are the correct OD to start?. Or are they different on the OD also since the chart considers both crank and rod/case sizes for selection.
Honda 72 CL100 sold
74 CB750 K4 nice driver
1966 CA77/305 Dream nostalgic driver
84 GL1200I work in progress
1970 CT 70
1982 GL500 Interstate
I wonder if bearing shells could be "rebuilt" by electroplating new material on to the bearing surface?
I bet youtube has a video showing how bearings are made.
Timothy Mark Fisher
Catalina Arizona
"ride it.. don't be one of those guys who will fix it 'til it's broken" (JDVorchek)
"It is not logic or economics that drive a motorcyclist but passion!" (bugdaddy66)
"I fully agree with fish, well at least 27% of the time."(Casper)
"Why do you have to ruin a perfectly good thread with common sense"(Placerville)
"my best guess for an answer would be a stream of complex expletives" (Transitman)
"I like a cold beer with my beer" (OldeWing)
"Most of us like the sport of wrenching too." (fred camper)
"Now go ride the heck out of it, til mother says do your chores"(Gowing)
"I agree with Fish" (Salukispeed)
Timothy Mark Fisher
Catalina Arizona
"ride it.. don't be one of those guys who will fix it 'til it's broken" (JDVorchek)
"It is not logic or economics that drive a motorcyclist but passion!" (bugdaddy66)
"I fully agree with fish, well at least 27% of the time."(Casper)
"Why do you have to ruin a perfectly good thread with common sense"(Placerville)
"my best guess for an answer would be a stream of complex expletives" (Transitman)
"I like a cold beer with my beer" (OldeWing)
"Most of us like the sport of wrenching too." (fred camper)
"Now go ride the heck out of it, til mother says do your chores"(Gowing)
"I agree with Fish" (Salukispeed)
I have a crank that at some point has all the journals re-ground to 0.5mm undersize. There is no wear on the crank and only a little on the shells. But I have tried everywhere to find where these shells came from, with no luck.
I posted pics of these some time ago, but at the moment they seem to be lost. I still have the crank and most of the bearings.
"Impossible Is Just a Level of Difficulty!..." If I'd wanted you to understand, I would have explained it better! (Johann Cruyff) I’d give my right arm to be ambidextrous!
