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GL1200 Motor rebuild update

704 Views 9 Replies 7 Participants Last post by  90Blazer
Well this is motor #2, and it is going to go into my personal bike, so everything has been disasembled, inspected, measured and cleaned..got some of the parts in.
New pistons, Rings, Pins, Bearings for the transmission, crank and shift drum.
So next is ordering some of the soft parts, gasket set, clutch, belt tensioners, belts seals and so on..but I am going to make a how to for rebuilding a gl1200 motor..so those that might need it can have a good reference.
Miuki、私は日本で、部品を見つけることしていただきありがとうございます.それはたくさん役立ちました!
(this is a thanks to a friend in Japan that found me new pistons and rings)
So as soon as I get the order to saber cycle and the new parts get in, I will up date you on how it is going.
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Well this is motor #2, and it is going to go into my personal bike, so everything has been disasembled, inspected, measured and cleaned..got some of the parts in.
New pistons, Rings, Pins, Bearings for the transmission, crank and shift drum.
So next is ordering some of the soft parts, gasket set, clutch, belt tensioners, belts seals and so on..but I am going to make a how to for rebuilding a gl1200 motor..so those that might need it can have a good reference.
Miuki、私は日本で、部品を見つけることしていただきありがとうございます.それはたくさん役立ちました!
(this is a thanks to a friend in Japan that found me new pistons and rings)
So as soon as I get the order to saber cycle and the new parts get in, I will up date you on how it is going.
Just curious what caused the rebuilds ? And ummm check around and do a search here for a reliable parts supplier.
pics! we love pics. check previous posts about sabre cycle/barracuda bike. not everyone is happy with them.
If you get parts from sabre cycle be aware they may be inferior quality and there is no chance in he!! of you getting your money back.
Well the first motor was just due to age..so it was time. but this one was a motor I had bought that had failed due to an alt conversion that was on it..but the damage was minimal, so it was able to be saved. I have built a few of the 1100 and 1200, but parts are getting harder to find. And I have read the post about some of the vendors, but I have never had an issue with saber, so I try to stay with what works for me at least. but I also work with a list of places I get parts from..But after I take everything apart, clean it ..then I normaly spend a few weeks inspecting all the internal components and parts. I have never re used bearings (the roller and needle type) and the hard parts I check and they have to be within new specs or I will replace them..ok..or try too.
But I will get some photos going once I get some more of the motor assy laid out.
What damage did the conversion do to the motor? And whats the cost to rebuild the motor?
Well the first motor was just due to age..so it was time. but this one was a motor I had bought that had failed due to an alt conversion that was on it..but the damage was minimal, so it was able to be saved. I have built a few of the 1100 and 1200, but parts are getting harder to find. And I have read the post about some of the vendors, but I have never had an issue with saber, so I try to stay with what works for me at least. but I also work with a list of places I get parts from..But after I take everything apart, clean it ..then I normaly spend a few weeks inspecting all the internal components and parts. I have never re used bearings (the roller and needle type) and the hard parts I check and they have to be within new specs or I will replace them..ok..or try too.
But I will get some photos going once I get some more of the motor assy laid out.
There was a pulley added to the crank, but that doesn't have a roller bearing on the front..so it wore the front main bearings on the stress side that it was pulled against. so I sent the crank out and had the journals checked and the it wasn't bad, so it was just the bearing that was failing. But I think after all I will have into this one it will be in the $2500.00 range. but for me that is a pretty good investment to have a motor that is back to new. But I have always used stators from Rick's and have never had a problem, so I am pro stock. (And I love the 1200 goldwing)
But the tough part was finding a new set of pistons for it..I have a friend in Nikko, Japan that found a dealer there that had a set of oversized. so that helped. but I also had the cams re ground, and changed out the valves and guides, so looking forward to a trouble free bike for some years as my personal one. But I am also involved with Bike Sponsors, and they have a great discount program, so that has saved me some $ on parts..and saber has sent, well in my case some good quality parts. I have always used their carb kits, but I confirm that i have the right stuff on my orders, so I have never had to deal with a return. so I can't comment on that.
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This is a photo of the #1 main bearing from the motor.

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This could be a whole new thread, but after reading hundreds of posts about them, I haven't heard of alternator conversions doing a number on the crank bearings. It makes sense though.

Does this give anyone a second guess or two about installing an alternator conversion...?
I thought about the stress on the crank before I installed my poorboy kit. I figure that there is more stress on a overhead cam car is greater than the stress put on by the kit and they don't fail. Then again I'm no expert on stress, but there are lots of these kits out there and this is the first failure I've heard of that was attributed to the poorboy kit.
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