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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 09-12-2008, 01:52 PM   #11 (permalink)
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that motor is one heavy sumbtch...I could roll it around fine, and I could pick it up but just barely...
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Old 09-12-2008, 02:32 PM   #12 (permalink)
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This is all great info. I'm stripping down to get the frame powder coated this winter.

My brain was for some reason thinking "remove engine from frame" when I should have been thinking "remove frame from engine".

It does make the most sense to drop the swingarm, forks, etc. and just lift the frame off the engine.

I'll also be rerouting/reworking a ton of the wiring - there's way too much crap going up the frame and into my headlight right now. If the pocketbook allows, I'll be doing some engine work at the same time.

Rodburner - single down tube would be pretty trick. I've always thought the somewhat "squarish" twin down tubes, location of the oil cooler and that top/forward engine mount are what kind make the modern twins look a bit "porky" compared to the classics.

Sweat - How's that old truck coming along?
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Old 09-12-2008, 07:36 PM   #13 (permalink)
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I`d like to use a single downtube,siamese the stock tubes closer together or dog leg them back closer to the engine. With the exhaust ports directly behind the stock tubes,I`m forced to turn them too soon for my liking.A simple "I" shaped tube section would allow some gnarly header sweeps for a new 2into1 right side out.
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Old 09-12-2008, 10:25 PM   #14 (permalink)
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Sweat - How's that old truck coming along?
I haven't done much to the truck, I replaced all of the door hinges and the driver's side door latch (damn thing cost $250), new air filter, and a few other minor things, but other than that (and buying about $100 worth of Country Music tapes) I haven't done much to it besides driving it. It's like a time machine, I love it.
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Old 11-27-2012, 10:47 PM   #15 (permalink)
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Paging sweatmachine

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Then, I unbolted the lower section of the frame, and lifted the main part of the frame right off the motor:


This thread is good and zombie, but if you can remember, how did you support the back of the engine before you unbolted the rear lower frame bolts? The engine is only attached to the lower cradle at the front. When I look at mine, presently a frame and a motor sitting on a similar lift, I don't see a convenient way of propping the motor in order to pull the frame from the top.

Or, do you just hang on to the motor as you pull the lower rear mount bolt last, and let it pivot down onto the lift?
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Old 11-27-2012, 11:11 PM   #16 (permalink)
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The lift was up against the lower frame rails and I pulled the whole upper part of the frame off of the engine and lower rails. The lower rails were supported the entire time.
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Old 11-27-2012, 11:26 PM   #17 (permalink)
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I'm clearly missing something. The sump is higher than the lower rails, and the rear attachment point for the engine is the upper frame. I'll go out to the garage and stare at it some more .

Soon, I will cut a strategic 2x4 to stick under it, and stop thinking about it so much.
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Old 11-28-2012, 12:25 AM   #18 (permalink)
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This is from another project, but it's how I lifted the bike when removing the engine

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Old 11-28-2012, 09:32 AM   #19 (permalink)
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OK, I got it, I think.

In my case, I happen to have a pair of 2x4s under the cradle because my oil filter was too long. With the oil filter off and some minor jiggling, there is room enough to squeeze a 2x3 in there to support the sump, which is flush with the bottom of the frame.



Should be good to go for lift-off now. Thanks, I think this lifting the top frame off the motor approach makes good sense if you happen to be at a certain stage of dis-assembly, or, like me, if your wrench got ahead of your brain.
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Old 11-28-2012, 09:54 AM   #20 (permalink)
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I use some 4x4 blocks of wood under the center stand mounts on the frame,remone the lower frame rails first.put jack under.Remove swing arm and lower motor mount bolts first then remove top mount bolts let jack down slowly ans slide motor out the bottom.
You can allso do as I have lately weld up some 2x2 tubeing into a tee and bolt to the rear foot peg bolt holes,that works great and is alot safer.allso bike can set there untill you put motor back in.
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