PDA

View Full Version : ST 2 Long Travel Buggy



JohnT
08-15-2013, 07:23 PM
Hello , been lurking around here looking and reserching as much as possible . So jumped in to the buggy building .And I bought the plans to start my ST2 , but I guess it's my fault . I didn't realize that it was made from 1 inch tubing . I was wondering does everybody always stay with 1 inch or go up to say 1 1/4 or 1 1/2 . My plans was to run a 600 cc bike motor or if I could find one maybe a 750 . Any thoughts ?

chrisMX-15
08-16-2013, 02:12 AM
bigger is better im running (not actually running yet lol)1000 but my buggy is also 4x4

ErwinBnl
08-16-2013, 03:11 AM
The 1" tubing is 38mm in diameter... not 25,4.

For the ST2, 1" is working fine! It's quite a compact buggy and bigger size tubing is harder to work with in this design.

gvouvakos
08-16-2013, 03:11 AM
Bigger is always better.. I have a 750cc in my 2 seater modified st3 and am pleased with it.

For an st2 750cc should be good.. but bigger is better, and you will always want more power :p

JohnT
08-16-2013, 06:43 AM
My plan is to trail ride and to play in the sand with it . But with the extra size does anybody have any idea how much more the buggy going to weigh -in at with the larger tube ? Because weight is power.

Glock n Ballz
08-16-2013, 08:10 AM
forget how much it weighs...build it strong. Thick wall tube. I went the cheap route and paid the price.

Trust me.

CARLRIDDLE
08-16-2013, 08:31 AM
Thought I remembered the Badland plans called it "pipe" which would have an ID of 1" and OD in the 1.25-1.35" A build out of 1.25 "tube" would be stronger and lighter. .095 wall. 1" tube for some bracing would be fine.

JohnT
08-16-2013, 10:48 AM
forget how much it weighs...build it strong. Thick wall tube. I went the cheap route and paid the price.

Trust me.
__________________
Glock n Ballz
Ft. Worth, Tx

What do you mean ? Please explain .

As far as the plans calling for the use of pipe I'm going with DOM tubing . Not sure if I going with .083 or .095 wall thickness .

Pstegs 101
08-16-2013, 11:14 AM
I would go with .095 dont mess with safety

JohnT
08-16-2013, 06:15 PM
Yea , My thoughts exactly , 1 1/4 Dom tubing an .095 walls thickness . And leave the bottom 1 1/2 Square tubing . and see how that holds up . Does anybody run 1 1/4 tubing on there A arms or leave it 1 inch heavy tubing ?

CARLRIDDLE
08-17-2013, 05:56 AM
1-1/4 tube arms. A-arms on all 4 corners and I used 1" for the bracing of arms (rear).

Glock n Ballz
08-17-2013, 06:37 AM
My plans called out 1.3125 OD. Not sure if thats considered pipe or tube. For my ongoing repairs Im using .120 wall. Yall do what cha want.

Im not screwin around.

JohnT
08-17-2013, 04:11 PM
I'm sorry I guess I miss read what it's being measured by . I thought it was 1 inch OD not . 1 Inch ID . Anyways I spoke to Bruce today and I think I'm going with 1.5 with .083 if it's available if not I 'll go with .095 . A Arms and all .

Glock n Ballz
08-19-2013, 05:42 AM
I used to build High Power Rockets...you cant over build a rocket, you can only under build. Seen many casastrophic failures under powered ascent. Same is true for Buggies- about under building I mean. Get the .095.

Duane
08-19-2013, 08:20 AM
Houston, we have a problem. Don't want to say those words when it's still Saturday morning of a three day Roost fest.

JohnT
08-19-2013, 05:09 PM
Well I will difinitely be careful in the wall thickness for sure . I just wan it to be safe and fast and fun . Thats all .

sqweeker
08-20-2013, 12:21 PM
Hi John,
I built several of the ST2's, used 1.5” 0.060 square tube for the base frame, 1.25" 0.095 wall for the main frame and 1" .095 wall for the bracing, have not had any issues and we beat the crap out of the buggies, with an R6 engine they weigh in at 830#'s wet.

If you're going to follow the plans,.... I would suggest that you layout the base frame tube on a sheet of mfd board and set your components in place before you start to build out of tubing, you may find you have to stretch the frame at the rear or maybe the middle to be able to get the motor in front of the rear drive area, and have enough leg room depending on how tall you are. I used R6 motors and found they would not fit in the existing plans unless you wanted to run a jack shaft setup and mount the motor up fairly high. I had to extend the rear section of the base frame 5" to fit me and the engine.

The other area you want to check is the height above your head, when you have your seat sit in it and measure the height to the top of your head, and make the A and B pillars taller and wider at the top than the plans call for, I had less than 2”,s and that is not enough for a helmet or bounce room for your head.

The front lower A arms are also a weak point you may want to add a lower bent tube to the A arm as a truss to keep them from bending.

Have fun they are a blast to drive when your done.

boilermaker
08-27-2013, 01:22 AM
That is all good advice for anyone building an ST2.

Glock n Ballz
08-27-2013, 01:14 PM
That is all good advice for anyone building an ST2.


I second that. I also did not like the idea of the jack shaft and the up high engine. The jack shaft wasnt the deal breaker for me, having the engine way up high was though. F__ks with my Center of Gravity too much. I wanted my engine down low and thats where I have it.

JohnT
09-22-2013, 04:37 PM
Sqweeker Do you have any pictures of your buggies that you built .

sqweeker
09-23-2013, 08:50 AM
Hope these turn out

sqweeker
09-23-2013, 09:08 AM
http://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1878-dscf1802c.jpghttp://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1877-dscf1801c.jpghttp://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1876-dscf1784c.jpghttp://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1881-r1-st2-buggy.jpgTrying a different wayhttp://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1880-dscf1822c.jpg

JohnT
09-25-2013, 01:32 AM
Very Nice !! I like it . Can't what to get my going . What size of motor are you running ?

sqweeker
09-25-2013, 11:22 AM
This one has an 03 R1 a little overkill for a lite buggy, goes way faster than I'm willing to go, old age does that for you.

I also used a protodie rear spool and 930 CV's on this one to try some new stuff out. the other 4 I built have R6's and they are very fast and very fun to drive, I used ujoints on them and they are working out ok other than twisted a few 1/2 shafts but they are easy to replace.

Looking forward to your build,
Have fun,
Ted

JohnT
09-28-2013, 06:32 PM
Ted Did you use a FNR gearbox in any of your buggy ? If so what kind did you use ?

chrisMX-15
09-29-2013, 04:57 PM
yea i didnt like the smaller a arms either i built mine out of same size tube as the chasis on my st3 but mine also 4x4 and powered by cbr1000r and yea before you weld it all together make sure it fits you i changed mine from a 600 to 1000 motor and had to redesign the whole rear and front of the chasis to keep the motor low as others said i dont want high CG so i hung all my diff and drive train under buggy to keep motor low i gained 8+ inches by doing that

sqweeker
09-30-2013, 02:23 PM
Hi John,
No not yet, I really haven't missed having reverse, well actually that's not accurate, one time I did, when the wife decided to park in front of a tree going down hill on a trail, that was not to much fun,...

I'm looking to build another one with an 06 R1 that I picked up, might try putting one on it, I was looking at the RPM box, but likely will end up in divorce court pretty soon, mini buggies are like crack and once your hooked look out, wives don't seem to understand the need for just one more.

Have fun,
Ted

sodman
09-30-2013, 05:17 PM
Hi John,
No not yet, I really haven't missed having reverse, well actually that's not accurate, one time I did, when the wife decided to park in front of a tree going down hill on a trail, that was not to much fun,...

I'm looking to build another one with an 06 R1 that I picked up, might try putting one on it, I was looking at the RPM box, but likely will end up in divorce court pretty soon, mini buggies are like crack and once your hooked look out, wives don't seem to understand the need for just one more.

Have fun,

Ted

Ted, That's a good one "wives don't understand the need for just one more" You can tell them "wives that is" that buggies are a lot like shoes . It doesn't work but it is still the same principle . The wife found no humour in that one oh well
Sorry about the hijack

Nivek4209
10-01-2013, 04:58 PM
I can only say this one way
Can I have some close ups of your backend :)
I wanna see how you managed to get your engine so low and so far back
I'm using an limited slip diff and its leaving my engine high and fwd am hoping to lower the wishbone mounting plates that carry the diff below the bottom line of he chassis maybe a little more at the front than the rear but not sure how suspension will work if its tilted down slightly
Any pics would be greatly appreciated

daaboots
10-04-2013, 11:37 AM
That turned out very nice! Great job. Any videos of it running?

sqweeker
10-06-2013, 11:20 AM
http://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1921-dscf1790s.jpgRear end pic's

These are the only ones I have

http://http://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1920-dscf1787s.jpg

http://http://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1922-dscf1791s.jpg

sqweeker
10-06-2013, 11:22 AM
Try again

http://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1922-dscf1791s.jpg

sqweeker
10-06-2013, 11:25 AM
Last one
http://www.minibuggy.net/forum/members/sqweeker-albums-my-toys-picture1920-dscf1787s.jpg

wikisi
10-06-2013, 01:56 PM
Does the exhaust pipe stick out underneath the frame? Aren't you worried about flattening the pipe when you bottom out?

sqweeker
10-10-2013, 02:44 PM
Hey wiKisi,
No not worried about bottoming out, the lowest point in the design is the sprocket, the exhaust runs parallel to it. There is a skid plate the full length under the rear to protect the sprocket and exhaust both are protected.

Not ideal but necessary with this type of design using a center spool.

Have fun,
Ted

bubbajay
10-12-2013, 04:52 PM
have any problems with overheating? MHO the rad should be mounted higher up to get some air flow.

gvouvakos
10-13-2013, 05:50 AM
Nice looking so far!! keep it up

Nivek4209
02-09-2014, 12:16 PM
That looks slot longer than mine behind the seat
Looks good though
Have to get mine dug outa the corner and figure this out