TRX250R.ORG
Workshop => Carburetor, Intake, and Exhaust => Topic started by: broken1 on August 23, 2025, 11:14:41 PM
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I have a TRX-5 pipe that ended up with heavy internal rust due to a coolant leak. I didn't realize the pipe was still full of coolant when I parked the R for about a year. It rusted the pipe & the inside/core of my FMF Q-silencer. The turbine core portion of the silencer was almost completely rusted out & non salvageable. Looking on here & other places for idea's on how to fix the pipe/silencer I saw a post by rsss396 about making a wire brush out of a piece of cable to remove the scale from inside the pipe. It worked great to get the scale out & prep in for the rust remover. I started with the silencer as a test piece & it came out looking like almost new so than I went onto fixing the pipe. The chemical I used is CRC Evapo-Rust & I gotta say that stuff works amazing. It's a bit on the spendy side at $28/gallon but the end result was worth it considering how much used 5 pipes go for these days. For the silencer stinger/core I made a trough out of 2x4's & lined it with 6 mil visqueen, that took 2 gallons of evapo-rust to fill. Same procedure to soak the pipe but I used 2 2x4's stacked on edge. If I was going to do it again I'd use 2x8 or 2x10 to make the trough. For the pipe it took 6 gallons which it would be cheaper to get a 5 gallon bucket + 1 gallon. Soak time is dependent on how bad the rust is but I let everything soak for 6 days.
(https://thumbs4.imagebam.com/da/95/94/ME159KSF_t.JPG) (https://www.imagebam.com/view/ME159KSF)(https://thumbs4.imagebam.com/d9/b8/44/ME159MEK_t.JPG) (https://www.imagebam.com/view/ME159MEK)(https://thumbs4.imagebam.com/9a/db/02/ME159MM8_t.JPG) (https://www.imagebam.com/view/ME159MM8)(https://thumbs4.imagebam.com/f5/24/31/ME159MMC_t.JPG) (https://www.imagebam.com/view/ME159MMC)(https://thumbs4.imagebam.com/6f/22/54/ME159MMW_t.JPG) (https://www.imagebam.com/view/ME159MMW)(https://thumbs4.imagebam.com/e0/7a/f7/ME159MPR_t.JPG) (https://www.imagebam.com/view/ME159MPR)(https://thumbs4.imagebam.com/36/21/21/ME159MQQ_t.JPG) (https://www.imagebam.com/view/ME159MQQ)(https://thumbs4.imagebam.com/9a/40/90/ME159MRN_t.JPG) (https://www.imagebam.com/view/ME159MRN)(https://thumbs4.imagebam.com/03/84/01/ME159MTD_t.JPG) (https://www.imagebam.com/view/ME159MTD)(https://thumbs4.imagebam.com/0c/6c/2a/ME159MTW_t.JPG) (https://www.imagebam.com/view/ME159MTW)(https://thumbs4.imagebam.com/78/73/13/ME159MXU_t.JPG) (https://www.imagebam.com/view/ME159MXU)(https://thumbs4.imagebam.com/e3/49/61/ME159MY4_t.JPG) (https://www.imagebam.com/view/ME159MY4)
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The beauty of the Evapo-Rust is that it's water based & reusable. After soaking the pipe & silencer I rinsed them really good with water, blew them out thoroughly than heated them up with a heat gun to evaporate any residual water inside than I sprayed boat engine fogger in the pipe to prevent any flash rusting. Overall it worked very well, didn't hurt the chrome plating & made the pipe usable again.
(https://thumbs4.imagebam.com/8d/11/ff/ME159MYE_t.JPG) (https://www.imagebam.com/view/ME159MYE)(https://thumbs4.imagebam.com/73/d0/b3/ME159MZ4_t.JPG) (https://www.imagebam.com/view/ME159MZ4)(https://thumbs4.imagebam.com/65/94/9b/ME159N17_t.JPG) (https://www.imagebam.com/view/ME159N17)(https://thumbs4.imagebam.com/5c/35/10/ME159N1V_t.JPG) (https://www.imagebam.com/view/ME159N1V)(https://thumbs4.imagebam.com/ab/e4/c3/ME159N2T_t.JPG) (https://www.imagebam.com/view/ME159N2T)(https://thumbs4.imagebam.com/66/08/2e/ME159N3L_t.JPG) (https://www.imagebam.com/view/ME159N3L)
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Awesome find Kevin!