4 - stroke Schwinn Stingray Chopper occ

motoredcorndog

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Joined
Aug 6, 2017
Messages
1
hey KC, is there a certain place you buy your extra long throttle cables? i have a build going that has 22” ape hangers on it and i can’t seem to find a long enough throttle cable.
 


dmopedMA

Active Member
Joined
Apr 14, 2017
Messages
171
Just few updates over this weekend:
- As KC suggested, throttle cable is too short, I ordered the longest one in Gasbike: 80'', planning to put it underneath the bottom of the frame and coming up from the back of the frame to the engine.
- I tried to install the motor, looks like the clamps are gonna work, I believe I have 1/4 to 1/2 inch between the chain and the back tire with the motor a little bit moved to the left (not completely centered on the frame), I have to cut the clumps in order to do a test installation, but I believe it is gonna work, I'll upload pictures of how it looks like.

Off-topic: driving my 2-stroke Tuesday night throttle cable broke half way home... I'm sure was funny to see me driving with one hand and pulling the broken cable from the carburetor with the other... Now I have a use for the throttle cable that came with the 4-stroke kit.
 

dmopedMA

Active Member
Joined
Apr 14, 2017
Messages
171
Finally I had time to work on this!

I was able to install the motor with few modifications on the original bracket and the two u-clamps. The most important trick is how to bolt the motor to the bracket, I installed it with the part that usually points back pointing front and installing the motor as left as I can, then, only two screws will touch the frame of the bike, so I installed other two screws nutted on the motor side, check this pic, it's easy to show than to explain... BTW, I used the hex nuts than usually are used for the bracket instead of the black ones that are for the motor, because the hex ones gave me more stability touching the frame.

019.33894130_std.JPG


I had to drill the interior of 4 nuts because the tread of the u-clamps was not going to the base of the bracket, so now they are "nut-washes":

IMG_20171104_105745.jpg

I had to cut part of the choque plastic tip because it didn't fit, but you can still use it with no troubles, moving it from the base of the plastic:

IMG_20171104_110923.jpg


This is how it looks like, looks like double nutted, but only one nut has thread:

IMG_20171104_110724.jpg


Here how the u-clamp looks like underneath:

IMG_20171104_110852.jpg


Here how it looks like with the chain on:

IMG_20171104_140347.jpg


Pic from the "ugly" side:

IMG_20171104_143540.jpg


Final picture of the work:

IMG_20171104_143655.jpg


I still need to put some oil and gas on it to do the first run, but it was too late already, so I hope I can test it out today or tomorrow.

Things on my to-do list:
- Chain is only about 2mm from the tire, good enough for now, but something to improve.
- I have other muffler to install, but I have to modify because it doesn't fit with this frame.
- Gas tank is hold only with two nuts, good enough for now.
- Chain tensioner nuts are on the tip of the screw, I need longer screws.
- I had to remove the back wheel fender, I have to trim it to fit the chain and re-install.
 

Timbone

Well-Known Member
Joined
Apr 20, 2014
Messages
1,104
Finally I had time to work on this!

I was able to install the motor with few modifications on the original bracket and the two u-clamps. The most important trick is how to bolt the motor to the bracket, I installed it with the part that usually points back pointing front and installing the motor as left as I can, then, only two screws will touch the frame of the bike, so I installed other two screws nutted on the motor side, check this pic, it's easy to show than to explain... BTW, I used the hex nuts than usually are used for the bracket instead of the black ones that are for the motor, because the hex ones gave me more stability touching the frame.

View attachment 79796

I had to drill the interior of 4 nuts because the tread of the u-clamps was not going to the base of the bracket, so now they are "nut-washes":

View attachment 79789

I had to cut part of the choque plastic tip because it didn't fit, but you can still use it with no troubles, moving it from the base of the plastic:

View attachment 79795

This is how it looks like, looks like double nutted, but only one nut has thread:

View attachment 79790

Here how the u-clamp looks like underneath:

View attachment 79791

Here how it looks like with the chain on:

View attachment 79792

Pic from the "ugly" side:

View attachment 79793

Final picture of the work:

View attachment 79794

I still need to put some oil and gas on it to do the first run, but it was too late already, so I hope I can test it out today or tomorrow.

Things on my to-do list:
- Chain is only about 2mm from the tire, good enough for now, but something to improve.
- I have other muffler to install, but I have to modify because it doesn't fit with this frame.
- Gas tank is hold only with two nuts, good enough for now.
- Chain tensioner nuts are on the tip of the screw, I need longer screws.
- I had to remove the back wheel fender, I have to trim it to fit the chain and re-install.
Looks like you resolved all the pertinent issues! Congrats! Have fun and be safe!
 

dmopedMA

Active Member
Joined
Apr 14, 2017
Messages
171
Looks like you resolved all the pertinent issues! Congrats! Have fun and be safe!
As you said, challenging bike, but I already did an easy one and the fun is double on the building than on the riding for me!
 

dmopedMA

Active Member
Joined
Apr 14, 2017
Messages
171
Brief update: motor works and pulls, able to start moving from stop with no pedaling. Don't know about max speed, not tested yet at all, but feels with enough torque, more or less (I'll say more, but maybe because of the excitation) like my two stroke.

Now, comparing the two stroke with the four stroke, I'll buy 4 stroke again... It is true that I'm not comparing apples to apples, because this is a good 4 stroke kit and my 2 stroke is an old China girl that I found on the street... But still, no vibration, solid construction and the centrifugal clutch are my new best friends.
 

Frankenstein

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Joined
Jun 24, 2016
Messages
5,078
What I never understood is that the engine is fine for burning fuel and powering equipment, unless you put it on a motherfreaking road, then all a sudden it's no longer OK.

But anyway that's a fun looking bike, gear down to like a 30 tooth or something near that since a 44 gets a whopping top speed of 15 with that tiny rear wheel. My friend recently completed a 212 in a stingray frame and is currently stretching and installing another in the same type of bike, does wheelies off the line and 45mph at least for the top speed.. Lol I think a 79 would be a nice in the middle for that bike and it would just fit without changing up the frame.
 

dmopedMA

Active Member
Joined
Apr 14, 2017
Messages
171
What I never understood is that the engine is fine for burning fuel and powering equipment, unless you put it on a motherfreaking road, then all a sudden it's no longer OK.

But anyway that's a fun looking bike, gear down to like a 30 tooth or something near that since a 44 gets a whopping top speed of 15 with that tiny rear wheel. My friend recently completed a 212 in a stingray frame and is currently stretching and installing another in the same type of bike, does wheelies off the line and 45mph at least for the top speed.. Lol I think a 79 would be a nice in the middle for that bike and it would just fit without changing up the frame.
I have a 36t on the back wheel and an 80 on the transmission, my calculations are that it will get at least 30mph, but with the stock brake I don't want to try it...
 

KCvale

Motorized Bicycle Vendor
Joined
Apr 18, 2010
Messages
3,518
I had to cut part of the choque plastic tip because it didn't fit, but you can still use it with no troubles, moving it from the base of the plastic:
I have to cut the choke plastic lever down on many 4-stroke builds.

The trick is to epoxy the lever back on, but if you can do that you can orient the lever however you want, like off to the side.



Just a tip ;-}
 
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