Yamaha g16 frame tubing size

wvguy · 01-03-2021, 02:50 PM

Can anybody verify the size tubing for a g16 I’m working on stretching mine I cut it and measured the back half looks to be 2 1/4 inch and the front section looks to be 1 7/8 diameter I was just trying to make sure it’s my first stretch and am trying to figure out thickness hate to put something in that will flex was thinking in using roll cage tubing any info is appreciated

smallblock450sl · 01-04-2021, 03:18 PM

were did you cut the frame tubes at? Show us a picture.

wvguy · 01-04-2021, 06:47 PM

I cut it in the welds where the smaller tube slides into the larger one it will be this weekend before I can get pics but I will get back to you thanks

smallblock450sl · 01-05-2021, 01:33 AM

Sorry to say, that was the wrong spot to cut.

pilotdane · 01-05-2021, 08:19 PM

Since you've got the tubing cut already it would be super easy to just check the wall thickness with calipers. The exact wall thickness probably won't be important as it might be a metric or special made tubing for Yamaha and you're going to probably be buying steel you can get locally that has gauge wall thickness.

As far as the not bending... go thicker. Whatever the wall thickness is I'd go thicker and maybe larger diameter if you can do it. You're stretching the cart so the added spanning distance will require more strength. Then you'll be putting more into the stretched cart so you'll need even more strength. Depending on your stretch you might even consider rectangular tubing so you can have nice tall, vertical sidewalls for strength but making that round to rectangular transition will require extra work.

Since only you know how long you are stretching and what you intend to carry only you can do the figuring.

wvguy · 01-07-2021, 09:13 AM

Was planning on welding slugs in to go bigger tubbing where should I have cut the frame since I cut in the wrong place guess I should have done more research

pilotdane · 01-07-2021, 08:12 PM

Some gusset plates in the joint area and everything can be good.

smallblock450sl · 01-08-2021, 02:48 PM

Sorry if I sounded rude

We would cut under the floorboard where the frame tubes were the same "OD". We did some on the inside "OD" and some on the outside "OD". I liked the inside because we could stick it farther into the frame tubes before welding. We also used a lot of 1 x1 tubing for floor support. Good luck on you build

wvguy · 01-08-2021, 10:05 PM

I appreciate all the information I will try to post pics as I can on the build a little nervous since this is my first stretch again thank you all I really enjoy the input and all the help is appreciated thanks guys

slonomo · 01-11-2021, 08:19 AM

If strength is a priority, definitely use DOM tubing and not "pipe". Yes, gussets, gussets, gussets! How about some pics?

01-03-2021, 02:50 PM	#1
wvguy Getting Wild Join Date: Sep 2015 Location: West Virginia Posts: 100	Yamaha g16 frame tubing size Can anybody verify the size tubing for a g16 I’m working on stretching mine I cut it and measured the back half looks to be 2 1/4 inch and the front section looks to be 1 7/8 diameter I was just trying to make sure it’s my first stretch and am trying to figure out thickness hate to put something in that will flex was thinking in using roll cage tubing any info is appreciated

01-04-2021, 03:18 PM	#2
smallblock450sl Sometime's............ Join Date: Oct 2007 Location: Tacoma Washington Posts: 11,874	Re: Yamaha g16 frame tubing size were did you cut the frame tubes at? Show us a picture.

01-04-2021, 06:47 PM	#3
wvguy Getting Wild Join Date: Sep 2015 Location: West Virginia Posts: 100	Re: Yamaha g16 frame tubing size I cut it in the welds where the smaller tube slides into the larger one it will be this weekend before I can get pics but I will get back to you thanks

01-05-2021, 01:33 AM	#4
smallblock450sl Sometime's............ Join Date: Oct 2007 Location: Tacoma Washington Posts: 11,874	Re: Yamaha g16 frame tubing size Sorry to say, that was the wrong spot to cut.

01-05-2021, 08:19 PM	#5
pilotdane Not Yet Wild Join Date: Sep 2020 Posts: 58	Re: Yamaha g16 frame tubing size Since you've got the tubing cut already it would be super easy to just check the wall thickness with calipers. The exact wall thickness probably won't be important as it might be a metric or special made tubing for Yamaha and you're going to probably be buying steel you can get locally that has gauge wall thickness. As far as the not bending... go thicker. Whatever the wall thickness is I'd go thicker and maybe larger diameter if you can do it. You're stretching the cart so the added spanning distance will require more strength. Then you'll be putting more into the stretched cart so you'll need even more strength. Depending on your stretch you might even consider rectangular tubing so you can have nice tall, vertical sidewalls for strength but making that round to rectangular transition will require extra work. Since only you know how long you are stretching and what you intend to carry only you can do the figuring.
pilotdane Not Yet Wild Join Date: Sep 2020 Posts: 58

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01-07-2021, 09:13 AM	#6
wvguy Getting Wild Join Date: Sep 2015 Location: West Virginia Posts: 100	Re: Yamaha g16 frame tubing size Was planning on welding slugs in to go bigger tubbing where should I have cut the frame since I cut in the wrong place guess I should have done more research

01-07-2021, 08:12 PM	#7
pilotdane Not Yet Wild Join Date: Sep 2020 Posts: 58	Re: Yamaha g16 frame tubing size Some gusset plates in the joint area and everything can be good.
pilotdane Not Yet Wild Join Date: Sep 2020 Posts: 58

01-08-2021, 02:48 PM	#8
smallblock450sl Sometime's............ Join Date: Oct 2007 Location: Tacoma Washington Posts: 11,874	Re: Yamaha g16 frame tubing size Sorry if I sounded rude We would cut under the floorboard where the frame tubes were the same "OD". We did some on the inside "OD" and some on the outside "OD". I liked the inside because we could stick it farther into the frame tubes before welding. We also used a lot of 1 x1 tubing for floor support. Good luck on you build

01-08-2021, 10:05 PM	#9
wvguy Getting Wild Join Date: Sep 2015 Location: West Virginia Posts: 100	Re: Yamaha g16 frame tubing size I appreciate all the information I will try to post pics as I can on the build a little nervous since this is my first stretch again thank you all I really enjoy the input and all the help is appreciated thanks guys

01-11-2021, 08:19 AM	#10
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,441	Re: Yamaha g16 frame tubing size If strength is a priority, definitely use DOM tubing and not "pipe". Yes, gussets, gussets, gussets! How about some pics?

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