TRX250R.ORG
General => Projects => Topic started by: 1986trx250r181 on April 11, 2014, 09:38:37 PM
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I have recently started my duner project and would like to share with you guys. I am using a 87 frame and for a motor I am going with a psi 425 using a yz490 rod with a kx500 piston should be around the 465cc mark. I will be using the psi carb for now, haven't herd good reviews for the carb but I got the motor running last fall and seemed to run great, so I am going to give it a try if it doesn't work out will be switching to something else. I am going to try running The led puma inframe exhaust. I am very exited about the build. Will be keeping it updated with pics!
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This is the bike last year. I just put the motor in place to see how it ran. so this is what I started with.
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I got the frame powder coated with a few other things. I will be using the JJ&A racing axle with a +8 swing arm and +1 drag/dune a arms. And a picture of the engine.
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Nice. I like the white frame.
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Same color scheme as my build. Which might i add is badass colors. That engine looks pretty cool also. Put lots of pics up of your work so we can see what its lookin like man
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I think I will be going with 88 plastics. I have fronts in really good shape but the backs have a piece broke out of them. I was going to order some maier back plastic but im not sure how the colors will match up.
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made a little progress today put the a arms and spindles, steering stem and Rad.(http://forums.trx250r.org/vbulletin_imports/620_1587_2017-04-18_2342.jpg)
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Looks good. Keep us updated.
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Looks like a fun build! Which dunes do you ride at?
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Im liken the white frame. Makes the lines pop when bright and shiny. Keep up the great build.
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Looking good man, I would love to try a psi motor out myself. When I had sleds they all had psi, pioes, clutch kits and some other mods as well. I've always wanted one of there motors.
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I am from Alberta, there are some smaller dunes close by but usually do a few trips down to Idaho or Oregon in a year. I have never ridden a psi built motor before I have read that they have some over heating issues and also some problems with the dial-a-dome head. On this certain motor the head is fixed so there is no adjustment. hopefully that will get rid of that issue. And I will be running a gauge so I will keep close watch on the temp.
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made some good progress over the week. got the front brakes and shocks on. put the motor in place and mounted up the new led pipe!
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Im liken the white frame. Makes the lines pop when bright and shiny.
I agree POP!!!! Add some red fenders and lets see what she looks like!!!! I have to LED Puma pipe on my Puma. Works very well!
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I got my build pretty well done just some final touches and it's complete. Took it for a test run today and it flat out rips!:nevreness: Cant wait to get it on the sand!
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oops great. what size swinger did you end up going with? Looks around a +6?
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Ya it is a +6 swinger
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Ya it is a +6 swinger
wow I would of guessed +8 like your original post. that looks longer than my +6. Your build looks great.
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Well it is a +6 from the 86-87 length. Has anyone ran the rippers on this forum, I was going to go with a 12 paddle extreme, but instead I wanted to try the bigger paddle. I will have it out this up coming weekend to go beat up on some four strokes. I will keep you guys posted!
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dang dude amazing build! I LOVE that pipe! And i agree with everyone else, that white frame looks killer. I hope that motor works out too, the temp gauge will really help you keep an eye on things. I lived by an inline gauge on my 310 motor out in the dunes at Glamis last year; anything over the 230 degree mark and it was time to let her relax for 5 minutes; anything around 250 or higher i have heard will burn your rings up. Is that my old swinger? Cant tell, if it is than i really like the red! Again nice build man looks great
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Thanks for the compliments. I really like the inline gauge went for a pretty good ride on it today and the hottest it got was 160 which really surprised me cause I have heard bad things about over heating with these cylinders. And yes that is your old swinger powdered red, it looks great and works awesome so far!
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I now have the finished product, I am sure I will add a lot of little things in the future. I am very happy how it performs!
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so how did those rippers work out for you. i have a new set of 12 paddle rippers i want to run for my puma project and im still wondering if they are too much paddle.
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They are a lot of paddle. They sure hook up and pull hard up the hills though. If your putting down some good torque and your in the right sand I am sure they will work good. I noticed the power valve worked good with the larger paddle also. Good luck on your build mandom250r!
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I am from Alberta, there are some smaller dunes close by but usually do a few trips down to Idaho or Oregon in a year. I have never ridden a psi built motor before I have read that they have some over heating issues and also some problems with the dial-a-dome head. On this certain motor the head is fixed so there is no adjustment. hopefully that will get rid of that issue. And I will be running a gauge so I will keep close watch on the temp.
I owned this motor, it was super fast and had tons of torque. A really fun ride! Butttt, it did run hot! I ran an PWR radiator, a temp gauge and an inline cooler!! However, it apparently wasn't enough because she still blew and badly I might add. Even popped the freeze plus outta the side of the cylinder!! with that said it sounds like ur having some luck with it. Just keep a close eye on it!! Nice build and have fun!!
Thanks Higgy
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That's very interesting to here that you use to own this motor. I'm seeming to have good luck with it so far. I had it out for four days straight and I was running around 190-200, I did notice it would heat up a little more when I would pull a steep hill in 1st. Other than that I'm loving the power this thing puts out! Have you ever put this motor on the dyno higgy? I never got around to it yet.
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So what other quads did you go beat on? How does this engine compare to others?
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I never got to compare it to any bb 250s. But it sure liked to eat up the bb 450s and raptors! Its a true four stroke killer! I would like to see how it compares to a 431 puma
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me too