[Frames] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

Pages:1

Frames
(Click here to view the original thread with full colors/images)

Posted by: RidetheRed

People say that the 86 frrame is the strongest, but that dosent mean that the 87-89 frames are weak, right?

Posted by: 250-R-250

The 88 Frames are lighter and the obviously used less material on them, guesset them both and they are even.

Posted by: TheFontMaster

By no means does that make the other frames weak. The 86 frames just had more gusseting from the factory than the other years.

Posted by: HiperEX

anyone know where the weak spots on a 87 frame is im going to do mine sometime soon i need pics ect. thanks

Posted by: bananas

Go to here ... pictures to.!!!

http://www.exriders.com/vbb/showthr...threadid=164566

Posted by: bananas

250r 87 frame

Posted by: bananas

more

Posted by: bananas

you might move this one forward more. I hope my nerfs fit..

Posted by: bananas

Forgot to take this one before pc...

Posted by: bananas

Waiting to finish it....

Posted by: HiperEX

ok thanks alot bananas

Posted by: DierWolf

Just a word of advise.

Solid round rods Bend, tubes bend less, Square tubing bends least.

I would not suggest solid rod like shown in those pictures.

Posted by: HiperEX

yah i now i got all the materail already

Posted by: bananas

They aren't solid.

Posted by: RidetheRed

So you can ride any of them hard, but if you take care of them, theyll all be fine.

? how hard is it to strengthen the frames?

Posted by: 250-R-250

Its the same as any other frame man, a bad landing or smashing into a tree Will damage it...It wont fall apart on you just cause its old...But yes, I would pay more attention to the frame and all the known crack areas such as the mounts.If you can weld you can strengthen a frame

Posted by: RidetheRed

Instead of buyin an aftermarket frame, would it be just as efficient to take an original frame and strengthen it

Posted by: jgracing

good question ^ anyone know?

Posted by: baker250r

well, yea it would be just the same as a aftermarket frame in strength wise. Might even be stronger. but we also know that a aftermerket frame will make your quad worth so much more than a stock gusseted frame. I know I personally cannot afford a aftermarket frame, and its hard to get a brand new one these days unless you want to wait a long time. so we are doing the same thing, buying used aftermarket frames. IMO do the stock frame right and u will have a good frame for years.

Posted by: Smoker

The big difference with the aftermarket frames is the material used, generally they are 4130 cromoly, it's light and strong and will flex a lot better than the mild steel used on stock frames. You have to be careful gussetting frames also, if you gusset up an area designed to flex, it will make the frame too rigid and cause stress in weaker areas. The gussets help fight metal fatigue since the areas that are breaking are just pushed too far. There's a lot of engineering in chassis design, the 250R frame does have a strong design, look at the 450R's having problems breaking the top frame rail in front of the gussest (in front of kick starter) they don't build them like they used, of course they don't weigh as much either. My $.02, flame away if you like.

Posted by: TheFontMaster

quote:
Originally posted by Smoker
they don't build them like they used, of course they don't weigh as much either.

Of all the new quads the lightest is the 450's at 350 pounds, If my memory serves me corectly the 250r wieghed 328 pounds stock, and add in lighter aftermarket parts, also in dirt wheels when they ran an old article on the lt250 it wieghed under 300 pounds.

Posted by: Smoker

I was refering to the 250R frame to the 450R frame, I believe the 250R frame is heavier due to the square tubing.

Posted by: RidetheRed

IS there Anything that needs to be done to a 86 frame to strengthen it, or are they solid as they are

Posted by: Smoker

Something I'm surprised I don't see more of is boxing the frame where the swingarm bolt goes, since I see a lot of frames start the real beating there. Gusset it up in the areas suggested earlier in the post and box the frame out at the s-arm bolt. IMO

Posted by: Vtr_Racing

quote:
Originally posted by Smoker
Gusset it up in the areas suggested earlier in the post and box the frame out at the s-arm bolt. IMO

The 250r`s do crack there alot. That should be standard when you gusset the frame. Will save you some grief down the road, especially if you have a hot rod motor,

Posted by: baker250r

wut do u mean box the frame up?

Posted by: nacs400ex

quote:
Originally posted by 250-R-250
The 88 Frames are lighter and the obviously used less material on them, guesset them both and they are even.

Thanks for sharing, but maybe leave it up to people that actually own a 250r.

Even if you gusset them, Id say that the 86 frame might be stronger. However there's an extra year of riding on that frame, and it all boils down to who rode and how they rode it. So it's usually a hit or miss. I however have a gusseted 86, with boxed in swingarm bolt area. Its proven to be MUCH stronger.

Either way the frame is 19- 15 years old, something has to be done with it.

RidetheRed get your frame sandblasted, or strip it yourself. check and double check for stress cracks in the areas where most people gusset for strength. You dont want to leave a weak spot in that frame. Your also going to want to check for poor welds on the frame, and reweld if needed.

It might seem like a lot of work, but when it's done, you'll know exactly what your riding on and how safe it actually is and there shouldn't be any unexpected problems throughout the season.

Posted by: nacs400ex

quote:
Originally posted by 250-R-250
Its the same as any other frame man, a bad landing or smashing into a tree Will damage it...It wont fall apart on you just cause its old...But yes, I would pay more attention to the frame and all the known crack areas such as the mounts.If you can weld you can strengthen a frame

Well there's gusseting and there's over gusseting. If you get all excited and decide to add to much material to reinforce it. There is no flex in the frame, therefore usually making the frame have the exact same problems as before, if not only worse.

Posted by: nacs400ex

quote:
Originally posted by baker250r
wut do u mean box the frame up?

Instead of having just a metal plate which the swinger bolt goes through. You make it flush with the frame. Making it much stronger because there is more support. You dont need a longer bolt either, because when you fab it up, you allow for the bolt to countersink into the mount.

Posted by: baker250r

oh, alright, thanks man. i was plannign on doin that with my swingarm bolt area. i just didnt know they called it boxing in.

has anybody in here ever cut off the old subframe and made mounts for a aftermarket subframe? My frame part is good yet, but my subframe has seen better days, and i was just thinking cut off the subframe and weld mounts on. will it have any affect of the forward frame's structural strength if i cut it off?

Posted by: baker250r

quote:
Originally posted by Smoker
Something I'm surprised I don't see more of is boxing the frame where the swingarm bolt goes, since I see a lot of frames start the real beating there. Gusset it up in the areas suggested earlier in the post and box the frame out at the s-arm bolt. IMO

nother question.... lol wuts the s arm bolt? im guessing the motor mount that attaches to that s bend tube?

Posted by: 250-R-250

quote:
Thanks for sharing, but maybe leave it up to people that actually own a 250r.

I have a 86 Frame you stupid ***, You dont know everything there is too know..A 86 and a 88 frame are about the same after gusseting, and yes the 86 frame had more material..So granted yes it is stronger...GUSSET THEM THEY ARE ABOUT EVEN,

Posted by: nacs400ex

quote:
Originally posted by 250-R-250
I have a 86 Frame you stupid ***, You dont know everything there is too know..A 86 and a 88 frame are about the same after gusseting, and yes the 86 frame had more material..So granted yes it is stronger...GUSSET THEM THEY ARE ABOUT EVEN,

Well I just assumed someone like yourself, asking so many questions wouldnt have a quad.

I never said I know everything there is to know, but defintely nobody is ready to tackle gusseting just because they can weld.

Thats like saying I should beable write a textbook, because you can write.

Theres more to a frame then just slapping on metal for proper gusseting. It's simple you gusset too much and the frame is gunna crack.

You may be right sometimes, but do you have a clue why? Or just because someone said so? Thats why Im giving a hard time here.

Posted by: 250-R-250

I have had 3 quads, and I do ask alot a questions, is that a crime, I ask alot and still dont know enough...I never said that anyone should just tackle something like that, all i said was that gusseting will make them stronger.and to me it looks like just welding metal in the CORRECT places on the frame, he knows where to gusset it because people have told him, so whats left,if you know the correct places to weld, then you should be able to do it...ITS NOT ROCKET SCIENCE LIKE YOU MAKE IT OUT TO BE

Posted by: Smoker

Man, why do people get so bent out of shape, so you all know a lot, congratulations, help each other out with out getting bent.