There She Blows

[65ShelbyClone]

So the gas is five years old? That's about 4.7 years too old.

The plug looks okay to me. The chamber looks like it's coated with varnish from old gas or oil residue. The stringy stuff on the piston I've never seen or heard of before. Again, I can only think that it's varnish or something like synthetic oil doing weird things when exposed to fuel and combustion. The cylinder doesn't look like a 30min engine.

If it's using some oil, put a little Castor 927 in the case and send it hard. It'll smell great when it goes.

 

[bob58o]

This was my plan, not 100% sure there is enough length on the crankshaft to support both pulleys.

 

[BaconBitRacing]

This was my plan, not 100% sure there is enough length on the crankshaft to support both pulleys.

Just an idea: any way you could get rid of the pull start and put the supercharger pulley there?

 

[bob58o]

Just an idea: any way you could get rid of the pull start and put the supercharger pulley there?

I’m sure I could have figured out a way to run it off the flywheel side, but since my work shop consists of a drill press and angle grinder in my living room I was really trying to find bolt on parts.

I couldn’t quickly come up with an easier way using belts.

I thought about using chains with a double sprocket on the crankshaft and a clutch on a jackshaft.

In the words of Issac from “Cars and Cameras” … it’ll be fine.

Hopefully the bolt does most of the work and I keep gearing set for low end to maybe prevent the crank from bending or breaking.

I think I’ve seen some chain clutches installed hanging off the end of some crankshafts.

 

[BaconBitRacing]

I’m sure I could have figured out a way to run it off the flywheel side, but since my work shop consists of a drill press and angle grinder in my living room I was really trying to find bolt on parts.

I couldn’t quickly come up with an easier way using belts.

I thought about using chains with a double sprocket on the crankshaft and a clutch on a jackshaft.

In the words of Issac from “Cars and Cameras” … it’ll be fine.

Hopefully the bolt does most of the work and I keep gearing set for low end to maybe prevent the crank from bending or breaking.

I think I’ve seen some chain clutches installed hanging off the end of some crankshafts.

I really don't think It will be fine but here's to hoping!

 

[bob58o]

I really don't think It will be fine but here's to hoping!

This is what my inspiration was.

Im not sure. Those guys snapped a crankshaft. Not sure if it was this bike, engine, or configuration.

At 6 minutes in, they are doing something with the charging system. The zip tie belt lets know know they are legit. Lol.

 

[bob58o]

By replacing the standard spacer that comes with 30 series kits with this pulley, I’m shifting the driver unit 4 mm (~5/32”) outboard.

The outboard side of the pulley driving the supercharger has a “pocket” to allow the flat sheave of the TC driver unit to nestle in a little closer the the side cover.

 

[bob58o]

I have enough room to remove 2mm from the back of each pulley. That would put the driver unit at the same spot it would be if using the spacer required with the TC backplate.

 

[bob58o]

Since this is DIY GoKarts, I think I can get half of the way there with my drill press.

 

[bob58o]

It’s like shaving to gain 2mm shaft length because she said it wasn’t long enough.

 

[bob58o]

Now subtracting the washer I normally use on the crankshaft to align the driver and driven and I think we are about back to where the driver unit normally sits.
Free millimeters are the best millimeters .

 

[bob58o]

I am well practiced at losing 10mm sockets. I am beginning to learn how to misplace 1/4” drive 12 point 1/4” sockets.

 

[BaconBitRacing]

I am well practiced at losing 10mm sockets. I am beginning to learn how to misplace 1/4” drive 12 point 1/4” sockets.

Wow, you are so skilled! It takes some serious talent to lose all that.

 

[bob58o]

It’s always the last place you look.

If I only had a brain…

 

[bob58o]

Some of the wear marks on the piston and rod bearings.

I don’t know the Kelly Blue Book ranking for “fair / good / excellent” on the 212cc engine health scale.

 

[bob58o]

Top Ring gap was about 0.0175” near the top of the cylinder

 

[BaconBitRacing]

I'm no expert but that rod looks horrible. Piston not great either. Engine experts correct me if I'm wrong.

 

[bob58o]

Top ring gap near bottom of cylinder is maybe 0.005” tighter.
0.017”

 

[bob58o]

Journal.

 

[bob58o]

2nd ring gap near top of cylinder is about 0.0205” and about 0.0200” near the bottom.