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Antique 2-stroke Repair

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Antique 2-stroke Repair

qparker4 qparker4
New User | Posts: 3 | Joined: 03/14
Posted: 03/31/14
11:41 AM

I'm repairing a 2 stroke 1966 Suzuki b100p and was wondering.. what fluid treatments I should do for an engine and transmission cleanse? Right now I picked up "Sea Foam" gasoline treatment, lead substitute gasoline treatment for an older engine, and Marvel Mystery Oil for the crank case but haven't used any of them. I'm hoping to narrow down the options to one treatment for the gas and one for the oil. Currently there is a lot of build up inside the engine head from what I could see when I took off the exhaust and looked inside. Any help is appreciated.

The electrical question is how can you tell if an old rectifier is blown? Do they need to be grounded? and will replacing a rectifier on a 6v system fix the problem of blowing out headlights or should I just drop it and try to replace it with a newer voltage regulator...which acts as a voltage regulator and rectifier 2 in 1?  

Bikeguy Joe Bikeguy Joe
User | Posts: 175 | Joined: 01/09
Posted: 04/05/14
09:21 AM

Seafoam for the gas once in awhile.
Lead substitute? No valves, no need.
MMO for the crankcase? Waste of time.

The build up is carbon from ancient tech two stroke oil, modern oils will eliminate that.  

joegresh joegresh
Guru | Posts: 1055 | Joined: 03/09
Posted: 04/11/14
03:37 PM

You'll have to take apart the Carb and clean it. Most gunk that old won't wash away with pour-in-the-tank stuff.

Crankcase, just use what the book calls for and change it a few times to flush out.

Radio shack has a nice full wave rectifier rated 25amp for cheap. Use half for a half wave. Make sure your bike has a good battery, on some old bikes the battery itself is the regulator, without it the voltage goes high and blows bulbs.