JR_TRX 22 Posted August 6, 2021 (edited) I wanted to say thanks to all the info on the 90’s 300’s in here. These forums were a tremendous help. Brought one back from neglect. First time doing anything like this. Took my time. Frustration. Patience. Frustration. Slow. Pretty much in that order. I had Polaris’ growing up but never gave them this attention. Haven’t had a wheeler in 15 years. What was done to the ole girl- Carb rebuild Piston rings Valves-new and lapped Rockers spaced All gaskets and seals for top end Front brakes-me no like drum brakes Ball joints Front bearings New CV’s Wire wheeled A arms and painted Wire wheeled bumper and racks and painted Tire rods Front diff was seemingly in good shape CDI and coil New ignition Had to get the red R button on the reverse lever New vent lines all around Rear brake delete Double bearings in the rear backing brake Rear backing brake shaved down Wire wheeled the axle New nuts all around on the axle New seals in the rear diff-the bearings were seemingly ok-scared of the needle bearing in the diff Grease zerk in the axle holder Just synced up the throttle play, throttle screw and idle screw today. Lots of cleaning-lots of wire wheeling bolts And of course basic maintenance-spark plug, lubes, air filter and anti-seize and loctite where needed. She purrrrrrs. I don’t have the tally on the total money yet. I’m pretty stoked tho. First ride about an hour ago. Think I’m addicted to the resilience of the 300’s. Think I’m addicted to the 300’s period. Edited August 6, 2021 by JR_TRX 4 Share this post Link to post Share on other sites
Fishfiles 20,147 Posted August 6, 2021 Well your just going to tease us , show and tell Share this post Link to post Share on other sites
SeekanDestroy 24 Posted August 6, 2021 Wait a other floridian???? Share this post Link to post Share on other sites
JR_TRX 22 Posted August 6, 2021 11 minutes ago, Fishfiles said: Well your just going to tease us , show and tell Man I rode it without the front plastics and racks. Give me a day or so. Share this post Link to post Share on other sites
JR_TRX 22 Posted August 6, 2021 5 minutes ago, SeekanDestroy said: Wait a other floridian???? Born and bread! Share this post Link to post Share on other sites
SeekanDestroy 24 Posted August 6, 2021 1 minute ago, JR_TRX said: Born and bread! Same here im near tampa area. Share this post Link to post Share on other sites
JR_TRX 22 Posted August 6, 2021 3 minutes ago, SeekanDestroy said: Same here im near tampa area. Daytona area. Volusia county. Share this post Link to post Share on other sites
_Wilson_™ 6,593 Posted August 7, 2021 5 hours ago, JR_TRX said: Think I’m addicted to the resilience of the 300’s. Think I’m addicted to the 300’s period. congrats on the rebuild, thats not a bad addiction to have. lol! 1 Share this post Link to post Share on other sites
JR_TRX 22 Posted August 8, 2021 On 8/6/2021 at 7:31 PM, JR_TRX said: Man I rode it without the front plastics and racks. Give me a day or so. Timing chain needs replaced. I didn’t know what I was listening for til it was back together. IMG_1002.MOV IMG_1004.MOV IMG_1002.MOV 2 Share this post Link to post Share on other sites
Fishfiles 20,147 Posted August 8, 2021 JrTRX, that's nice !!! Do you know how to check that timing chain ? Unbolt the adjuster from the jug , it will spring out if in good condition , then try to push it back into the jug , if the gap between the adjuster and the jug is less than about 1/4 inch the chain is streathed and needs replacing ---- did you adjust the valves ?? Share this post Link to post Share on other sites
JR_TRX 22 Posted August 8, 2021 (edited) 36 minutes ago, Fishfiles said: JrTRX, that's nice !!! Do you know how to check that timing chain ? Unbolt the adjuster from the jug , it will spring out if in good condition , then try to push it back into the jug , if the gap between the adjuster and the jug is less than about 1/4 inch the chain is streathed and needs replacing ---- did you adjust the valves ?? Thanks I got about 1/4 inch on the adjuster but I can hear it rattling and yes, the valves are spaced .006. I had to go back in a readjust after the first run. I can remember how the chain folded vs curls when I was in the top end but didn’t know any better. I was too worried about the piston, valves etc and never looked up any info on the chain. Edited August 8, 2021 by JR_TRX Share this post Link to post Share on other sites
Fishfiles 20,147 Posted August 8, 2021 4 minutes ago, JR_TRX said: Thanks I got about 1/4 inch on the adjuster but I can hear it rattling and yes, the valves are spaced .006. I had to go back in a readjust after the first run. I can remember how the chain folded vs curls when I was in the top end but didn’t know any better. I was too worried about the piston, valves etc and never looked up any info on the chain. 1/4inch is about time to do the timing chain , DID is what OEM is and the best chain you can get , you can go for the 250ES or 250 fourtrax chain as it is heavier duty , like 7 side plates as opposed to 5 on the 300 , you can run the heavier duty chain on the stock 300 sprocket , the 250 sprocket is heavier duty , but to find one new is impossible 1 Share this post Link to post Share on other sites
JR_TRX 22 Posted August 8, 2021 Nice! Thanks for that. So a 250ex or 250trx OEM chain correct? Share this post Link to post Share on other sites
Orvis25 108 Posted August 9, 2021 (edited) @JR_TRX You might find this helpful if you have not taken a trx300 right side crankcase apart before. Wrote it up specifically to assist others for timing chain replacements 🙂 I had to do mine recently myself also, except mine was worn down to about only 3/16 of an inch of gap (SUPER WORN) Hope it helps you with yours! Edited August 9, 2021 by Orvis25 2 Share this post Link to post Share on other sites
Fishfiles 20,147 Posted August 9, 2021 9 hours ago, JR_TRX said: Nice! Thanks for that. So a 250ex or 250trx OEM chain correct? Not the 250ex --- use the TRX250A Fourtrax 1985-1987 or the ATC250ES 1985-1987 2 Share this post Link to post Share on other sites
JR_TRX 22 Posted August 19, 2021 (edited) Some progress on the wheeler. My wife named her Renda. 1.5 spacers on the rear. 18’ stock rubicon wheels and tires. Still need to do the timing chain. Waiting on the gasket. Really need to do an oil cooler mod. Most likely with a fan. Hot in FL… Edited August 19, 2021 by JR_TRX 3 Share this post Link to post Share on other sites