Schwinn sanctuary 7 4 stroke?

I'm thinking of going with a Schwinn sanctuary 7 for my first 4 stroke build. Has anyone mounted a 4 stroke on this bike? I found it for $230 on amazon.com. It's got everything I want on it. It's got speeds, V breaks on both wheels, and a rear rack.

 

[sawdust]

cruiser bike build with some pics

The first thing I install is the rear sprocket. Now before I install the sprocket, I take the time to remove the rear hub assembly, remove the grease that's in there and pack the bearings with disk brake grease for cars. The reason for this is that we are going to be going faster than this grease was designed to used for. I do the front bearings also. When installing the gear once you get all the nuts snugged down. I use a piece of chalk to hold against the sprocket lightly and spin the wheel. This will tell you where you need to tighten the bolts more to get the sprocket straight and true. This will take some time, but it's worth doing it right. Don't forget to use lock tite on the bolt threads. The thing I install is the pedal crank assembly. You will have to buy new pedals as the new crank has to have 9/16 inch threaded pedals, the old ones are 1/2 inch. Now this bike has two different size of tubes. The front one being bigger than the rear. Also you will see in the motor mount picture that I have no bolts holding the mount together. That's because once I had the mount to size, I welded the two pieces together from the bottom. Also I used a socket to form the correct size on the front of the mount. This also was re welded to make it strong. Now before mounting the engine mount to the frame. Take the time to put the engine on the mount to make sure that the holes line up. Every mount I've used from these kits..the holes don't line up. Alot easier to fix this before the mount is on the bike. Also, I do take time to use grade 5 or 8 bolts from the hardware store in place of the junky ones that come in the kit. Don't forget in the final assembly..everything gets lock tite at that time. It's better to take your time to pre assemble everything and make it right now. Make sure it right..then do the final assembly. Almost forgot. I do use bike inner tube around the frame for the motor mount..keeps from damaging the frame and gives a bit of vibration relief.

 

[sawdust]

engine mount pic

here is a little bit better pic of the engine mount...also..it makes it alot easier to build the bike if you have some kind of bike stand. I use a temporary road sign stand modified to my useage.

 

[KCvale]

Hey Sawdust, please help those that read your posts by throwing some paragraph breaks in you text so it's easily readable ;-}

Almost forgot. I do use bike inner tube around the frame for the motor mount..
keeps from damaging the frame and gives a bit of vibration relief.

I have disagree with that advice.

Mount the thing metal to metal as tight as you can get it.
A strong mount is what prevents vibration from a loose mount.

If you have excessive engine vibrations it's the engine, tune it.
Other vibrations can come from other places like your wheels or drive train.
Crappy bicycle tires at 25MPH will show their head with vibration.

 

[bikejock]

The first thing I install is the rear sprocket. Now before I install the sprocket, I take the time to remove the rear hub assembly, remove the grease that's in there and pack the bearings with disk brake grease for cars. The reason for this is that we are going to be going faster than this grease was designed to used for. I do the front bearings also. When installing the gear once you get all the nuts snugged down. I use a piece of chalk to hold against the sprocket lightly and spin the wheel. This will tell you where you need to tighten the bolts more to get the sprocket straight and true. This will take some time, but it's worth doing it right. Don't forget to use lock tite on the bolt threads. The thing I install is the pedal crank assembly. You will have to buy new pedals as the new crank has to have 9/16 inch threaded pedals, the old ones are 1/2 inch. Now this bike has two different size of tubes. The front one being bigger than the rear. Also you will see in the motor mount picture that I have no bolts holding the mount together. That's because once I had the mount to size, I welded the two pieces together from the bottom. Also I used a socket to form the correct size on the front of the mount. This also was re welded to make it strong. Now before mounting the engine mount to the frame. Take the time to put the engine on the mount to make sure that the holes line up. Every mount I've used from these kits..the holes don't line up. Alot easier to fix this before the mount is on the bike. Also, I do take time to use grade 5 or 8 bolts from the hardware store in place of the junky ones that come in the kit. Don't forget in the final assembly..everything gets lock tite at that time. It's better to take your time to pre assemble everything and make it right now. Make sure it right..then do the final assembly. Almost forgot. I do use bike inner tube around the frame for the motor mount..keeps from damaging the frame and gives a bit of vibration relief.View attachment 55564View attachment 55565

Nice! thanks for the tips sawdust. Is there any chance of me using the mount included in the 4G kit without welding anything? I don't have access to a welding kit so I'd rather try not to weld anything. Maybe with the chain guard removed I can lower the mount decreasing the mounts width to say around 6 to 7 inches?

 

[sawdust]

advice

Sorry about the running on at the mouth in my message. After working a 14 hour day..then working on the bike for a bit..I was tired and just ran on and on. Well, that's just what I do on my engine mounting. I've never had a problem with the way I've been mounting my engine this way. Again..just is the way I do it. You can do it anyway that you see fit.
And that is my 2 cents worth. Thanks for the comments.
Sawdust



I have disagree with that advice.

Mount the thing metal to metal as tight as you can get it.
A strong mount is what prevents vibration from a loose mount.

If you have excessive engine vibrations it's the engine, tune it.
Other vibrations can come from other places like your wheels or drive train.
Crappy bicycle tires at 25MPH will show their head with vibration.[/QUOTE]

 

[sawdust]

Well with this frame, I lowered the engine mount as far down on the frame as I could without hitting anything.

 

[KCvale]

Well with this frame, I lowered the engine mount as far down on the frame as I could without hitting anything.

I do that too, low as you can go ;-}