Help with swing arm design

fritster · 04-27-2010, 09:19 PM

Building a FAST EZGO cart ..

I stripped the old marathon to the frame. Putting a Suzuki 600 cc GSXR engine. A-arm front suspension was no problem, got that fabbed up.

For the rear I am using a transaxle from an EZGO TXT so I can have a reverse gear.

The rear suspension will be a swing arm type that the motor is mounted to so that the engine and rear end move in sync and the chain drive gives no trouble.

NOW... I built a strong swingarm out of 2 inch square tubing and mounted it to the frame using 2 inch johnny joints and will also be adding two 2 inch control arm bushings in the middle of the arm between the J Joints for added pivot strength.

The swing arm will secure to the rear transaxle with u bolts. I have two new shocks from a VW Beetle and may have to go with four beacuse of the weight???

What I need help with is:

1. What is the BEST position to mount the shocks in... or do I need another type of shock system like some sort of coil over system that mounts to the axle?

2. Do I need to design some type of control arm support, or 4 link or triangular link for the rear swing arm in order to keep the rear axle in line and keep it from moving from side to side?

My conscern is with all the power from the MC engine and the weight of 2 riders.. when cornering ... the swing arm will give side to side and cause me major problems to include wearing out the pivot joints and bushings quickly.

new front end fabbed.JPG

jjoint.jpg

rear view.jpg

shock positions.jpg.

Please look at pics to get an idea of where i am at. I want to do it right the first time.

Any advice is greatly appreciated.

BLACK DEATH · 04-28-2010, 11:05 AM

I would say put your bottom a arms at an angle like they do on cars. An 80s g-body car like a monte carlo or regal. There at an angle from inwards. Lemee see if I can find a pic on the net for you.

rib33024 · 04-28-2010, 11:18 AM

BLACK DEATH--this is a Duplicate thread answers are in the other thread

http://www.buggiesgonewild.com/lifte...rm-design.html

04-27-2010, 09:19 PM	#1
fritster Gone Wild Join Date: Apr 2010 Location: God's country.. Luziana Posts: 274	Help with swing arm design Building a FAST EZGO cart .. I stripped the old marathon to the frame. Putting a Suzuki 600 cc GSXR engine. A-arm front suspension was no problem, got that fabbed up. For the rear I am using a transaxle from an EZGO TXT so I can have a reverse gear. The rear suspension will be a swing arm type that the motor is mounted to so that the engine and rear end move in sync and the chain drive gives no trouble. NOW... I built a strong swingarm out of 2 inch square tubing and mounted it to the frame using 2 inch johnny joints and will also be adding two 2 inch control arm bushings in the middle of the arm between the J Joints for added pivot strength. The swing arm will secure to the rear transaxle with u bolts. I have two new shocks from a VW Beetle and may have to go with four beacuse of the weight??? What I need help with is: 1. What is the BEST position to mount the shocks in... or do I need another type of shock system like some sort of coil over system that mounts to the axle? 2. Do I need to design some type of control arm support, or 4 link or triangular link for the rear swing arm in order to keep the rear axle in line and keep it from moving from side to side? My conscern is with all the power from the MC engine and the weight of 2 riders.. when cornering ... the swing arm will give side to side and cause me major problems to include wearing out the pivot joints and bushings quickly. new front end fabbed.JPG jjoint.jpg rear view.jpg shock positions.jpg. Please look at pics to get an idea of where i am at. I want to do it right the first time. Any advice is greatly appreciated.

04-28-2010, 11:05 AM	#2
BLACK DEATH Gone Wild Join Date: Dec 2009 Location: Corpus Christi, TX Posts: 1,644	Re: Help with swing arm design I would say put your bottom a arms at an angle like they do on cars. An 80s g-body car like a monte carlo or regal. There at an angle from inwards. Lemee see if I can find a pic on the net for you.

04-28-2010, 11:18 AM	#3
rib33024 ...................... Join Date: Apr 2009 Location: FT Lauderdale FL. Posts: 16,416	Re: Help with swing arm design BLACK DEATH--this is a Duplicate thread answers are in the other thread http://www.buggiesgonewild.com/lifte...rm-design.html

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