1951 Safti-Cycle

GoldenMotor.com

curtisfox

Well-Known Member
Dec 29, 2008
6,082
4,060
113
minesota
It's a Lauson I got off ebay, I was always intreaged by the cros flow head design, Funny how it works, by one and now I have 3 that come acros my path. I have been working on a bike to fit it on, just that I don't have all that much time to work on it. .................Curt
 

Carbineone

Active Member
Oct 10, 2024
64
202
33
60
Thanks

The kickstarter did come today.. Got it most of the way installed..Still have to mount the little center pinion cover.. And hook the return spring up..I had to make my own shaft and mounting plate.. Looks like it is going to work great..Thanks

 

Carbineone

Active Member
Oct 10, 2024
64
202
33
60
Well got it out and took it for around a ten minute ride up and down the block.. I am more than thrilled with the way it works..It is almost scary fast..Has take off torque that is very nice, and great power throughout.. I am guessing I only pushed to around 30MPH on the test..And it have plenty to go..

Looking forward to finishing up some stuff this week..

Thanks
 

Gordy

Member
Oct 13, 2024
29
55
18
East Kentucky
A simplex servi cycle is one bike I really want to build with a briggs flat head. I've always been fascinated with the floorboards and the briggs flathead is one of my all-time favorite engines (aside from the Chrysler leaning tower of power, but that wouldn't fit). One of these days I'll get my hands on one and build a commuter out of it with a high output Briggs flathead.
 

Carbineone

Active Member
Oct 10, 2024
64
202
33
60
Rode it around again this eve for about 45 minutes..Kinda addicting to ride..Too bad Winter is coming soon..

I have the decal for the side cover on and the tank and the cover clear coated..Kick Start from Wayne is all done too...

Next thing is the foot boards..They should arrive this week..Will be nice to have those on..Once those are on, I can do the rear brake pedal and linkage..

Hope you run across a servi cycle..This project has been alot of fun..I get frustrated occasionally. But I always know in the end things workout if you stick with it..
 

Tom from Rubicon

Well-Known Member
Apr 4, 2016
2,847
6,148
113
Rubicon, Wisconsin
I really like the kick start of your Safeticycle. There is a thing I have known since I was a teenager called Harley CH kickstarter charley horse.
Especially if one forgot to retard the spark. Harley kickstarts have a one way thrust engagement in the transmission called a starter clutch.
I assume that if the engine catches one must be well clear of the kick lever as it returns home. You have a stellar build Carbine.

Tom
 

Carbineone

Active Member
Oct 10, 2024
64
202
33
60
Thanks very much for the compliment.

I am not real sure what would happen if the engine backfired the other way..But in this design, I think the ratchet on the kick starter may just disengage the pinion. It is actually a very simple but pretty clever design how it works.. I know all about those nasty kickbacks from my dirt bikes in the past..Even my 77 Bultaco I had as a kid, and still have..Does that occasionally..I can hardly muster the strength to start that one anymore. Age you know.LOL. Pretty easy if it was already started for the day..But if it sits for a while it can be a bear..
 

Carbineone

Active Member
Oct 10, 2024
64
202
33
60
Thanks for the suggestions.. I may put a copper line of some sort..That line I had in the Garage, so threw it on..Will show you a pic of the exhaust setup pipe tomorrow. This Winter I will do quite a bit of refining.. Right now I was just itching to ride it and see how the mechanical function is..
 

Tom from Rubicon

Well-Known Member
Apr 4, 2016
2,847
6,148
113
Rubicon, Wisconsin
Tygon is the fuel line of choice. I see no good reason to replace it. Steel and copper fuel lines are obsolete for good reason, they fail over time from strain and vibration, regardless of looping as Curt rightly recommends. For the sake of esthetics the Tygon could be sleeved with rubber tubing.
My Sportsman Flyer has Tygon fuel line. Does it look old-timey? Nope, but is the best fuel line.

Tom
 

Carbineone

Active Member
Oct 10, 2024
64
202
33
60
Got it.

Here is what I am going to attempt as a tail pipe.. It is stainless but not very heavy duty..It may or may not have alot of durability in a mobile environment..We will see I guess. It is exhaust for a diesel generator to take exhaust outside the usage area..

And no I did not drill those two holes in the frame to put the eyebolts through..They were there when I bought the frame, for what purpose, I do not know..The forward hole was there from the factory where the original exhaust ran through..Thanks
 

Gordy

Member
Oct 13, 2024
29
55
18
East Kentucky
Footboards came and have them mounted..They should suffice I think.

I am contemplating on leaving the clutches open. Or fabbing a cover? Any ideas? Thoughts?.

Thanks for following along..
Make something with an old brass symbol. I have one laying around waiting for the right project to do that with. I just picked up a free GC190 that only needs a fuel pump I'm considering swapping into my mini bike.