General Category => Restoration Projects => Topic started by: Cocina_47 on August 15, 2016, 04:50:24 PM
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Hi All,
I started the build of my bike this weekend. As usual I didn't get as far as I'd like.
I have a bad back so I'd thought that I would start the build by building a stand to bring the bike up to a level where I wouldn't have to be bending over all the time while working on it.
I had some left over pressure treated wood kicking around so I used that. Not the straightest but it did the job. I also had an old static pad so I cut that up and covered the rest points to protect the paint. I'm sure that it will probably need some redesign once the build progresses... 8)
Dave C
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Looks great , Dave .
Hope it's just right .
Pete . :)
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Looks fairly good to start with. Just remember a fully assembled bikes dry weight is 135lbs stock. You may need a extra hand to set it down. 8)
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Thanks! Luckily I married a STRONG woman. ;) Should be no problem to get the bike down.
Mounted the motor last night. Taking a couple of days off. Hope to make a lot of progress. :D
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Is the frame flat black? What color is the tank and fenders going to be?
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Yes, the frame is flat black. I went with a gloss black on the tank, fender, bars, back rack, headlight bucket and wheels. Thought I'd do something a little different.
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Hi All,
Put the brakes back together. Got the front forks partially together. Undercoating on the inside of the fenders. Painted some misalliance hardware. Making progress.
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Still making progress!
Got the transmission pulleys in place. Put the front end on.
Ignition switch mounting plate in place with grommets for the spark plug wires.
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Hi All,
Got the brakes installed and handle bars mounted yesterday. I also got the hand grips installed and working.
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Nice job! You will have bike done in no time. I hope you bring it to Portland next summer so we can see it in person.
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Lookin' good . I like the contrast of flat and gloss .
Pete . :)
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Thanks Guys! I really can't wait until I can ride it. Not going to push it though. Once the bike is done a trailer or a truck are in my near future. I plan on taking it to Oley in the spring and Portland in July.
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Hi Guys,
On Saturday I got the rear sheeve mounted on the rear wheel. Didn't really get much done today. I had to stop to make some peach wine. With the lack of rain here in the northeast the window for peaches is very short this year. Yes, it was a little setback on my progress but I'm sure I will appreciate it come Christmas time.
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The neighbor lady just brought a couple jars of peach jam for our enjoyment . Earlier , she did the same only blackberry jam . Most excellent stuff . ;)
Your wheel turned out pretty nice , too . :D
Pete . :)
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It's nice to have neighbors that look out for each other.
and thanks again.
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Really nice progress! Rick C.
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Hi Guys,
Question: I think that the right hand grip but is it a throttle. That would make it a forward (clockwise rotation)? If it is on the left then it would be a throttle back. Not really sure on that. I have a 1945 manual that states that the throttle is on the right? What do you guys know/think?
Thanks,
Dave C
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Throttle on right, compression release on left. The throttle works just like every other motorcycle out there, twist back to open, roll forward to close.
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Rick,
On my twist grips the cam is cut in the same direction. Making the identical so when I assemble them the right moves away from the center of the bars (lengthening the cable) when twisted forward not back toward the rider. The left is the opposite, toward the rider lengthens the cable.
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how interesting.....eh Rick S.!
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how interesting.....eh Rick S.!
Tom, did you ever turn yours around on the carburetor mount?
Read the 1947 Manual posted, in the operation section, it states how the throttle works.. I stand with Wayne that you have the throttle cable swivel on the wrong side.
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Dave C. is your throttle cable a solid wire or a braided cable.?
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Here is the section from the manual.
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Both the pressure relief and the throttle are braided.
Rick thanks for grabbing that section from the manual. I did see that last night. Sorry I didn't respond last night. I start my day pretty early.
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Does anyone know if the cam surfaces should be cut in the opposite direction on each twist grip? If they are then I have two left hand grips. If not I can't see a different way to assembly them. The pin that retains the outer cable is closest to the end of the bar and is captured by the twist grip itself and the cam pin is retained by the slip collar that slides over the twist grip closer to center of the bars.
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Does anyone know if the cam surfaces should be cut in the opposite direction on each twist grip? If they are then I have two left hand grips. If not I can't see a different way to assembly them. The pin that retains the outer cable is closest to the end of the bar and is captured by the twist grip itself and the cam pin is retained by the slip collar that slides over the twist grip closer to center of the bars.
KartJockey and I had this discussion with Wayne at Portland several years ago. I seem to remember the cable swivel on the carburetor needs to be turned to the other side. The cable should pull the carburetor open, not push. I don't have an early bike with the MS carburetor, so I can not just go look.
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Logically , if the right and left tubes are regulated alike and both roll back to open , the slots have to be cut in opposite directions .
Pete . :)
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Dave, just to clarify, when you twist the throttle in the normal direction, does the cable get shorter?
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Pete,
I agree.
Rick,
To answer your question, when you turn it in the normal direction the twist grip moves toward the goose neck making the cable shorter.
I have not attempted to connect the cable to the carburetor yet. I just going on the logic that the cable should move away from the goose neck, making the cable longer.
If this isn't clear I can take a quick little video of the movement. Or if you are on a iPhone we could facetime...
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Here is the video. Let's see if this works.
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Let me know if that works for you guys.
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Worked for me , Dave .
It seems that the twist tube in your video would need a push type set up in order to function as throttles do today .
I'm not sure if all years / models used the pull set up .
Pete . :)
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Pete,
I'll have to do more research. My problem is the bike never ran the whole time we've owned it so not sure how it worked when it ran. The throttle cable that was on it when I took it apart was braided ???
Maybe I can find a twist grip with the cam surface cut in the opposite direction. The other option would be to get one made. :-\
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OK Dave, now I see what you have. I concur, I can not see how that would work in the normal direction. I don't have an early style to take apart at home, so here is what that part should look like. As you can see in the drawing from the Simplex 125 manual, dated 1953, in the obsolete parts section, the cut is the opposite direction.
Call Wayne this morning and see if he has one, and have him take a picture of it.
Now to the detective work. As KartJockey has the same situation, I wonder if Simplex just simply ran out of the throttle side tubes, and occasionally substituted a left side to keep production rolling? Are they interchangeable? Does anyone else out there have this situation?
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Rick ,
They couldn't be interchangeable and have the same end result with the same 'driving' action .
It's not possible , unless one were a push and the other a pull set up .
Pete . :)
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Rick,
Yes they are interchangeable. But as you can see it does make it operate the wrong way.
Pete,
I think Rick was asking it they were interchangeable to go along with the theory that if they ran out of right side grips they would use a left to get the bike out.
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Rick,
Is Wayne available during the day? I've only ever talked to him in the evening.
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As 'flexible' as the company was with changes year to year and models , anything was possible . Still , for safety sake , I'd think they would have to change from pull to push set up along with the tube change .
Pete . :)
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As 'flexible' as the company was with changes year to year and models , anything was possible . Still , for safety sake , I'd think they would have to change from pull to push set up along with the tube change .
Pete . :)
Pete, do you think the assembly line worker in the 1940's was worried about safety? LOL
I usually call Wayne early in the morning, as he is an early riser. Just remember that he is in the central time zone.
If I really need to speak with Wayne, I have his cell number!
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The workers may have been a bit less enthusiastic about safety than the head office . I wouldn't think the workers were empowered to make changes like that .
Pete . :)
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The workers may have been a bit less enthusiastic about safety than the head office . I wouldn't think the workers were empowered to make changes like that .
Pete . :)
This is just after the war. I bet they did what they had to, to keep the production moving. No OSHA, EPA, NTSB, or other Federal agency breathing down their necks.
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True , That^ .
Pete . :)
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Okay Gents, mystery solved 8)
I called Wayne tonight and he explained to me that throttle on my carburetor is sprung in a way that without tension from the cable the motor is running wide open.
So with the cable connected and the twist grip in the full forward position (cable extended) the motor is at idle. Twisting the grip back toward the rider (normal throttle open) relieves the tension the spring allowing the motor accelerate.
If the throttle cable were to ever brakes on this set up the motor would run full bore. :o It sounds like strange way to set it up but looking at the carburetor Wayne is correct. You have to push against the spring to get the throttle up against the idle screw.
The light is bad in my garage so I will take a little video tomorrow to show that.
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So , basically it is a push set up .
No wonder they changed it to be a normally closed throttle .
That full open set up could be huge trouble .
Pete . :)
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I would classify it as more of a pull. ;D It still uses a braided cable.
It probably took a couple of broken or slipped cables to figure out that wasn't the best idea. :D
I also agree that the wide open thing. Could be problematic. ::)
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OK . Pull , in the opposite direction . Something had to be opposite .
Pete . :)
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Ok Dave, where's the video? LOL
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Rick,
Some of us have to work, you know! :-\
Here is the video. One thing I didn't say last night is that it has to do with the type of carb you have. Of course Wayne told me the manufacture's names but I don't remember... My card has 4 screws on the top. That type works as you see in the video. The ones with 3 screws on top work like modern carbs. you pull against the spring to give it gas.
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Rick,
Some of us have to work, you know! :-\
Here is the video. One thing I didn't say last night is that it has to do with the type of carb you have. Of course Wayne told me the manufacture's names but I don't remember... My card has 4 screws on the top. That type works as you see in the video. The ones with 3 screws on top work like modern carbs. you pull against the spring to give it gas.
Work, who works? In Obama's economy, don't we all just get a handout? LOL
I hear you on the work Dave, been working 6 days a week for close to 3 years. I'm nearing the end of my career, around 3 years, 7 months and 6 days, but who's counting!
BTW Dave, you are the first and only guy on here to ever post a video, pretty impressive. You wouldn't believe how many guys can't even figure out how to post a picture.
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My 48 has a MS93E carb. Float bowl is towards the left whereas an MT is to the right . To operate as Wayne suggests it will have a tube below and inline vertically with throttle shaft about two inches long with a torsion type spring that attaches to bottom of throttle shaft.
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My 48 has a MS93E carb. Float bowl is towards the left whereas an MT is to the right . To operate as Wayne suggests it will have a tube below and inline vertically with throttle shaft about two inches long with a torsion type spring that attaches to bottom of throttle shaft.
Tom, do you have a picture of that?
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Work, who works? In Obama's economy, don't we all just get a handout? LOL
I hear you on the work Dave, been working 6 days a week for close to 3 years. I'm nearing the end of my career, around 3 years, 7 months and 6 days, but who's counting!
BTW Dave, you are the first and only guy on here to ever post a video, pretty impressive. You wouldn't believe how many guys can't even figure out how to post a picture.
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As far as the handout thing... It all depends on how you'r raised.
I'm close to the end of mine but not, not counting yet. :)
As far as posting the video. I am a admin/support for a CAD/PDM system. Started my career as a mechanical designer back on the drafting board. Now I have to support designers that only want to know who to run the CAD system. Ask them to save a file to their desktop and they look at you like you have three eyes. I don't know it all seems logical to me. I guess I'm just wired that way.
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My back-up carb. The throttle does stay open per the spring tube at bottom. Keeps throttle open and works really well.
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That one looks like the same carb that I have.
Dave C
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Hi All,
It's been a while. Had a wedding in the Great White North last weekend. Then I had realized that I forgot to put the spacer in the tranny pulleys before I put it back together. Had to destroy the one of bearings to take it back apart. Waiting on replacement. Also... after learning about how the throttle worked I realized that my pressure relief and the throttle cables were short. Had to order longer ones...
This weekend is the Holiday so not much got done but I did enjoy the weather and friends/family. :)
Now I need the forum's help again.
The Mystery Part ??? ??? ??? ??? ???
I can't believe that I don't have a picture of where this part goes. I have about 200 of the bike before disassembling. :-\
I think ??? it has something to do with cable retention but I can not figure out where it goes.
Any thoughts?
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Hey,
I know I've been slacking. Funny how life gets in the way of your hobbies.
BTW still looking for any thoughts on my mystery part.
Anyway...
I've made some progress.
I have the tranny pulleys put together properly. I done quite a bit of assembly. Take a look.
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Looks to be coming along nicely . (http://www.cb750c.com/modules/Forums/images/smiles/thumbsup.gif)
Wish I could help with your mystical bracket , but , I got nothin' . :(
Pete . :)
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Hey All,
Got some more done on the bike this weekend.
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Dave ,
You just better slow done . Next thing ya know , you'll be telling us the project is all done . ;)
Pete . :)
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Pete,
I'm already thinking about what I want to do next. Maybe I'll find something in Portland next year.
Dave
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Pete,
I'm already thinking about what I want to do next. Maybe I'll find something in Portland next year.
Dave
That's the spirit! I always have at least one project bike waiting in the wings.
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Pete,
I'm already thinking about what I want to do next. Maybe I'll find something in Portland next year.
Dave
That's the spirit! I always have at least one project bike waiting in the wings.
Must be nice , Dave . Good you're planning on Portland and another project .
Rick , I always seem to have another project waiting in the wings , too . Only mine happens to be the same project .
Pete . :)
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Hi all,
Got the bike running this weekend. Here is a video of my first ride.
Not sure how well the video is. I have a better one but I don't think it will post.
If you'd like the better one, email me and I will send it to you.
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This video is a little better
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Good going , Dave . :)
Pete . :)
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Hey,
I buttoned up the wiring last weekend and now I have lights.
About the only thing left is to hang the decals. :)
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That looks about like my headlight brightness .
Not bright enough to see where you're going , but just enough for others to see where you are .
I have to figure that the factory thought there would never be any kind of 'obstruction' while night riding . ;)
Pete . :)
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I know what you mean. I've been looking at replacing the tail light bulbs with LEDs. Got a couple on order... We will see how that goes.
I already have an LED for the headlight but I would have to HACk the reflector to make that work. If i can find a replacement reflector I would give that a try... Still thinking about that.
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Seems I recall someone found that a Harbor Freight light reflector would work .
Here's the thread : http://www.simplexservi-cycle.com/index.php?topic=1343.msg11818#msg11818
He uses a battery to power the light , but said the reflector was a good fit .
Pete . :)