TRX250R.ORG
Hybrid => Hybrid 250R => Topic started by: ytman on April 12, 2020, 12:17:16 PM
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WARNING: Long Story
I built this quad a hunnert years ago. It’s been apart for a long long time. It’s still apart but I finally got to address a huge problem. And since I have the welder out I’m fixing and changing what was already a pretty bitchen ride. When I built this I was racing desert on a 250r. I always ran 22” tire to get up out of the rocks so there was never enough power and I never wanted to build a big little two stroke motor and I kind of wanted a 4 stroke. First I built a 350X and put that in a R. Not fast enough. Honda then came out with the 400ex....shine. Me no likee. Dirt Wheels mag built a XR500 quad that was pretty awesome but they already had a XR600 two wheeler so that got me going. Plus I had one. I emptied out the motor and sent it off to Lonestar. They built a frame around it that would use 250R components. Unfortunately kickstarting a long stroke 4 poker takes a long kick and the kicker hit the footpeg before finishing the stroke. After trying unsuccessfully to fabricate a peg mount that would let the kicker get a full stroke I gave up. Plus Lonestar had an idea on how to mount the back brake pedal coming from the front, like an ATK, that I wasn’t fond of. I picked up a 650L electric start motor and away we go. Lots of problems solved and new ones to be addressed. The motor mounts were just strong enough to hold the motor without starting it. Broken, broken, broken. I was so busy adding metal that I never even got to powdercoat it. The swingarm was trying to leave the frame too. That’s when I decided to tear it apart and do a major. The swingarm pivot has to be tied to the motor like every bike since the 90s. Well that was a long time ago but everything is here to resurrect her once I get the rest of the nagging things rectified.(airbox& intake) plus it’s fun. Maybe after she’s back together and shaken down I’ll even be able to make her pretty. Now I have to figure out how to post pics.
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For adding pics...
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I love these types of builds. Thanks for the write up. Can’t wait to see pics .
Joe
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Gussets and extra swingarm support during quarantine
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Awesome build! Keep it coming
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Found this swingarm on eBay a while ago. It’s 19.5” It looks like a Laeger but it could be anything. I cut the front tube so I can use ‘86 pivot parts then added some bracing back in. That way I can attach the pivot to the motor mounts
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I found this GIANT front bumper on eBay too. It looked well constructed and said it fit a 250R. I don’t know how without trimming the hood. This frame is 3” taller than stock and it’s close. What better quad for a monster like this to go on? Haha
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Nice. My uncle wanted to build a trx450r/650R hybrid for desert racing but I don’t think it’ll ever happen. He’s retired from racing and pushing 60 now. He has the engine and the quad. He was gonna have Ed Tiexeira build it but Ed is extremely busy.
I hope you finish yours!
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Michael88r I actually raced a 400EX/650R hybrid in Best In The Desert a hunnert ....no only 75 .....years ago. Mikey Johnson and his pop Dick Johnson put together a bad ass quad. Unfortunately the difference in our weight and riding style made the quad really hard to ride for me. We managed to finish some races tho. I bet your uncle still thinks about finishing his dream quad,
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Cool stuff ytman
Joe
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Wonder if you guys ever met. His name is Gerald Nunes. He raced Ironman expert. Won V2R 3 times. Only got beat once by Cody Mitchell who was a bad ass and less than half my uncle’s age. Forget what years exactly. I think his first V2R was about 12 years ago. Back when Greg Stuart was dominating pro class.
The 400/650 is sweet.
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Originally I used a 350x air box and boot. The filter and boot are very restrictive and I didn’t realize(thanks to the strength of the stock plastic airboxes) that the shock was beating the shit out of the box. I cut the front off of an aluminum box that Tim Neiderhart(sp) built for me.(yes Timmyboy) I bought two and proceeded to mount both of them, on different machines,in a way that got both of them beat up. I didn’t feel bad about cutting it up cause I already effed it up. I’ve cut the front off and made a new face with the hole in the right spot, big enough for 250r filter, and a clearance notch for the pipe. Unfortunately I ran out of argon so I can’t weld it up. I’ll get some on Monday.
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Outa gas. :'(
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Michael88r I don’t know that I’ve met him. My first V2R was a little before that haha
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Nice post! Love to see cool fab work on these projects.
.....and look at those Trail Pro tires!!! Haha I love those terrible tires for some reason. Remind me of my old Blaster
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Thanks Tbone. Those Trail Pros were tough with a capital T. That reinforcing bead saved a lot of rims for me. Heavy tho. Not good for a Blaster haha. I was always looking for tall tires. The Carlisle Trail Hawk was a tough ass 23.5 tall front but for an 11” rim. My brother bought a Banshee and it came with a pair of 11” rims that were drilled for both the Yamaha and the Honda. They had the name “Bringle” stamped on them. I liked those. I had Douglas Wheels make me two sets out of their thick stuff and I welded rings in them. Unfortunately 11” tires aren’t that readily available in tough ass anymore.
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Got me some weldin ’ gas today. No awards for beads but I’m all I can afford. Haha. Finished up the air box, unless the chain or brake hits under full bottom out conditions. I also got some work done on the steering damper mount. I’m a big fan of the Scott’s damper.
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Mocking up.
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Very cool man!
Friend of mine raced Baja on a very similar build. A banshee one year as well.
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I wish I had seen this sooner....I would have suggested a Can-Am DS450 intake tube.....worked great on my 650R build....but I see you've welded up your Airbox...so I'm too late! :(
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I remember those pictures but I couldn’t remember what intake it was. Haha . Thanks anyway. I think I have a plan. It’s pretty hairbrained so I’m not gonna talk about it just yet. In the mean time I figured out what was hitting the 350x air box so I cut it for clearance so at least I can get it running.
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Well I spent all day mocking everything up to see if there’s going to be anymore changes. Obviously I have to rebuild the brakes and shocks before I can go farther. There’s a lot of cleaning. Everything has old grease, dust, and I’m pretty sure there’s some black widows hiding in there. She needs all new hoses and I have to figure out where all the electrical connectors go.
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I like the long hoses on the Works Performance shocks I had on back then. It reminds me of a buggy. I’m going to start with those. I bought these resi clamps a long time ago. I was surprised and happy when I opened the bin and found them. I’m a big fan of Ohlins but I don’t have those right now. I took these all apart to clean up and send off for service. Most shock guys won’t touch Works anymore. I’m going to contact Schmidty from the vendors section.
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If that doesn't work out try Worx Performance. Basically the same as Works Performance. Might be able to help you out
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Thank you soooooo much 2ndmoto I had heard they closed but not that they reopened. That’s awesome as I’m not that far from there.
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My "R" had a 600R motor in it, but when I bought it, it came with no motor. The frame had been modified on both the lower and upper tubes, which was almost ideal for the 350X motor that is in it now. The lower tubes had been dropped ~1.5", the tube between the foot peg mounts, was placed lower, the link mount was moved and shortened, and the left upper tube had been pulled out to accommodate the head. The frame mods had been professionally done and needed no work, but I replaced both upper tubes to ensure that the frame was straight. The frame was cracked in all the usual places (it was a desert racer) and I repaired, fish-plated, and made gussets for all but the swing arm pivot, and front shock tower, which I got from Pumashine. I run a huge oil cooler, using JIC AN fittings and stainless hoses. The swing arm that came with it, was cracked badly, so it was replaced with a +2" Lonestar unit. I run a 400EX header pipe, Supertrapp, and pumper carb. The frame is almost ready for powder coat, I just need to weld in a battery mount and a rear master cylinder reservoir mount and then magnaflux the frame for any hidden cracks. The rear brake pedal was crazy modified, and got replaced with stock. The foot peg mount threads were shaky, so they got 1" long time-serts to return them to factory, or better. TRX450r foot pegs and heel guards finish it off.
desertR
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DesertR did you put an electric starter on it? Is that why you need a battery?
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No electric start, but I wanted a battery to run my LED lights, and converted the stator to DC. I bought a battery box out of a Yamaha Zumba cw50 (light and little)
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She’s alive. It was an oily mess getting all the air out her oil lines but she bbubububububus along just like she used to. I may be able to do brakes and little things but shocks are going to have to wait until I start getting a paycheck again. Haha
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It’s a good thing I have a tractor....I would have had to knock the stand over to get her off haha. Well she’s on the ground. Still no rear brakes but the fronts work. Had some old shocks that are good enough to hold her up.
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Very cool!!!
Joe
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That looks like fun!