Womens Issues

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msrfan

Well-Known Member
Sep 17, 2010
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Thanks msrfan, i always value your input.

You said "I was thinking about your pulley clutch. I use them myself and know they take some hp because of constant tension."

When you say "take" some horsepower, do you mean they can handle a lot of HP and should be fine.... or did you mean they take a lot of horsepower to run, meaning it would rob my engine of power and probably wouldnt be the best idea?

What do you think of the inlet manifold, i wanted to keep it well out of the riders way to be rider friendly and that seemed to be the best spot.... do you think it will run ok?
Yes, it takes some power away, but your 3hp will handle it nicely. I like the long intake runners. Gives more torque. You will need a support if you get too long. I love these old flatheads. They're all over just laying around and you can do so much with them. If you're interested, the numbers on the shroud tell the year of the engine. It's the first 2 numbers of the last group.
 

msrfan

Well-Known Member
Sep 17, 2010
1,808
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You can make that shroud look better by making it teardrop shaped at the top. You can cut the boxxy part up and curve it over the coil and make it look more vintage. Try a cardboard mockup like you do so well with the tanks. The shroud is the most recognizeable thing on a Briggs because most look just like yours whether it's 2 or 10hp. Changing it a little makes a totally different look. I cut up the one on my 8hp and changed the looks considerably.



 

harry76

Well-Known Member
Apr 16, 2011
2,557
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Brisbane, Australia
Yeah supports are planned. I will make brackets to the frame, i also need to find some steel for the flange ends. Its only just tacked atm to get some idea of what it looked like, and i do like it.

It must be a 1980 then. Thanks for the heads up.

Will i need to do any engine mods for the angle of the engine, or just need to add the right amount of oil?
 

harry76

Well-Known Member
Apr 16, 2011
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Very cool....Yeah i like the look of that shroud.... will i lose any cooling benefits by doing that, looks like the air wouldnt be directed as well.
 

MEASURE TWICE

Well-Known Member
Jul 13, 2010
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Nice job Harry. I really like the tank above the motor. Slightly resembles a Simplex style. I was thinking about your pulley clutch. I use them myself and know they take some hp because of constant tension. If you were to use a comet or similar torque-a-verter driver, you would only tension the belt when you rev the motor and the pulley sides come together. An added benifit would be an adjustable ratio by moving your jackshaft closer or farther from the motor allowing the belt to ride higher or lower in the clutch driver. Anyway, just brainstorming. They cost about $80 and I have not purchased one yet. Maybe next month, and I'll let you know the results.
A full kit for a torque converter I have seen for a least expensive one at $209.00 and a simple centrifugal clutch for $49.00 if that sounds right.

I have a centrifugal belt clutch, but the amount of height to the sides is minimal, so I don't think the moving the jackshaft forward or after would have much range to change the gear ratio.

Maybe you mean if you got the separate parts that are for the clutch part of the full torque converter kit, and used it?

My old Briggs 5S that came off a reel mower labeled Moto Mower Company founded 1919 has one of these belt clutches and I was thinking I could weld on higher sides to it. I think that might be difficult to get it done right to get it modified, but interesting idea.

Belt Drive Centrifugal Clutches & Parts

TAV 30-75 Torq-A-Verter

Measure Twice
 

msrfan

Well-Known Member
Sep 17, 2010
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I loose some cooling with the custom shroud. I should have kept the sides on and curved it over the coil the other way. My tilted motors use the stock amount of oil. No other mods are needed.
 

curtisfox

Well-Known Member
Dec 29, 2008
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minesota
Nice job Harry. I really like the tank above the motor. Slightly resembles a Simplex style. I was thinking about your pulley clutch. I use them myself and know they take some hp because of constant tension. If you were to use a comet or similar torque-a-verter driver, you would only tension the belt when you rev the motor and the pulley sides come together. An added benifit would be an adjustable ratio by moving your jackshaft closer or farther from the motor allowing the belt to ride higher or lower in the clutch driver. Anyway, just brainstorming. They cost about $80 and I have not purchased one yet. Maybe next month, and I'll let you know the results.
About 50 years ago I had a home built and they used to sell a clutch that all it did was come tgether and pinch the belt,and you go. I have been looking for one and they don't make it anymore. It was called a V-Plex. Sortof like the front of the max torq, but didn't change speed..........Curt
 

harry76

Well-Known Member
Apr 16, 2011
2,557
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48
Brisbane, Australia
I loose some cooling with the custom shroud. I should have kept the sides on and curved it over the coil the other way. My tilted motors use the stock amount of oil. No other mods are needed.
Thanks, ive never seen inside one of these motors and if i dont need engine mods theres no real need to. So my question is do you think ill need more oil? How much oil do they take?
 

MEASURE TWICE

Well-Known Member
Jul 13, 2010
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http://motorbicycling.com/f36/briggs-kick-start-motorbike-25549-6.html
see post #58 BriggsBiker pictures that show a forward tilt and I suspect no problem with oil, I’ve wondered, but you may check with BriggsBiker

http://motorbicycling.com/f36/briggs-kick-start-motorbike-25549-5.html
see post #41 my comment on tilt of engine from the same thread as above

Pictures I have attached of the guts of the engine and the splash fork. For level operation, I noticed it rotates a sweep of the fork from the side by the breather (aft) down into the oil. Then the fork moves across and upward to the front up and out of the oil at an angle by the time it is halfway forward.

A back tilt leaves the fork in the oil for a longer period of the sweep when tilted back I presume from this. It would have to be tilted more than my about 22.5 degrees I guess I have tilted back to get into the oil breather. The channel way to it from the crankcase would help stop it anyway.

Tilting forward I know it would be further from the oil breather so that’s not a problem. Someone said that they thought it would maybe cause oil to get too much on the bottom of the piston. I don’t think it should really matter, just getting enough oil where it won’t leak out like the breather.

So check the pics I have and from BriggsBiker check and see how it works.

Probably not a problem:)

Measure Twice

PS the Briggs Engine is an 80202 0430 Model, ? 3hp
 

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MEASURE TWICE

Well-Known Member
Jul 13, 2010
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The picture of the crankcase cover I put up there to show the oil fills. The engine when level has the oil just what about an inch or so below the top of the plug threads if I remember right.

Then thinking where that relates to inside the crankcase with the other three pictures, let that be your guide to what is happening.

Then you just guess-ta-mate what the tilt will do and what it may or may not do.

Measure Twice
 

harry76

Well-Known Member
Apr 16, 2011
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Thanks guys, and thanks Measuretwice for showing me my first look inside these engines.... i take it the fork thingy is the splasher??? Wasnt what i had pictured in my mind so thanks again guys.
 

MarkSumpter

New Member
Nov 27, 2010
474
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Ohio
Harry I just wish that was my first peek into the innards of a 3.5 Briggs... LOL after 35 years in the small engine industry and most as a MST (master service technician, I was the 18th certified MST in the U.S.) for Briggs me thinks I have seen far too many and written so many service bulletins I cannot even count them anymore...
 

harry76

Well-Known Member
Apr 16, 2011
2,557
47
48
Brisbane, Australia
Well id happily exchange your knowledge for my lack there of. LOL..... WOW, Sounds like you know your stuff. I on the other hand am making this up as i go along so if you see me doing something wrong please dont hesitate to pull me up on it.

Yeah while on one hand it must be good to have dealt with these engines, but all this is new to me. And its great learnng all these new things, feel like a kid again.... thats probably what you miss.

Im wondering what your engines are like? Do they run like clockwork because you know about them? Or are they just barely running because its the last thing you feel like doing, having done it for so long?......... you know like a chef that never feels like cooking....
 

MarkSumpter

New Member
Nov 27, 2010
474
0
0
Ohio
Since retiring I collect and restore antique engines mostly of which are Briggs including a 1913 Briggs carriage engine with most of carriage and some of these... For the most part they run pretty good especially for their age.

I used to have a saying that if it isn't 50 years old it ain't gold but the longer I live the less that is a realistic statement. Basically I collect pre WW2 engines and when I can find them pre WW1 engines of any variety.
 

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msrfan

Well-Known Member
Sep 17, 2010
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Southern California
Wow Mark, those are some sweet motors. Mine are not that old. I have a kickstart "Y" and an "A" in a Pincore generator. OH, and a "ZZ". Always wanted to make a Red Bug.
 

harry76

Well-Known Member
Apr 16, 2011
2,557
47
48
Brisbane, Australia
Very very cool, they sure are some nice motors you have there. The second motor has a barrell very similar to my 98cc Villiers.... love your motors, something about old motors and copper fittings that just does it for me. Great work

 

msrfan

Well-Known Member
Sep 17, 2010
1,808
120
63
Southern California
About 50 years ago I had a home built and they used to sell a clutch that all it did was come tgether and pinch the belt,and you go. I have been looking for one and they don't make it anymore. It was called a V-Plex. Sortof like the front of the max torq, but didn't change speed..........Curt
That's right Curt. I have one of those clutches for a 5/8'' shaft and I know I'll probably never see another one. That's why I was suggesting the driver from a Comet set-up. Don't get excited though, I have plans for it. I used to have one for a 1/2'' shaft but let it go on a little go cart I sold years ago.
 

MarkSumpter

New Member
Nov 27, 2010
474
0
0
Ohio
I have a recent addition of a 1933 opposed Maytag Briggs long body with kick start I would really like to build into as bike in the future...