Category Archives: Honda TRX
’88 TRX300 Top end rebuild
Here’s my list as far as I have put it together:
1. Piston kit- I found the Namura kit on eBay, and was wanting some feedback if anyone has used this kit before? I’ve heard good things about Namura before, but want to be sure
2. Both valves, probably just going back with OEM ones, found a decent deal..
3. Intake valve guide
4. Top end gasket kit, I’ve went with the Tusk kit before, and really liked it, so I’m probably going to go back with it..
5. Camshaft- mine shows excessive wear(one of the things I kind of chose to overlook before) I’ve read that the early 300’s have a different cam, how much power loss would I notice if I went with a later style one? Or should I go with one from a big red? (Which I’m guessing is the old 250’s)
6. Timing chain guides and chain- mine are worn really weird and need replaced, and obviously I might as well go ahead and replace the timing chain…
7. Rocker arm- probably just going with OEM here as well..
8. Jug- mine was kind of messed up when I got the 300, as the bottom of the timing chain tunnel where the two bolts goes through was broken away from the jug, but I had that tig welded back together.. The bore was beat up just a little bit from the valve beating around inside so I’m either going to see about getting it machined by a local machinist that does a good job, or buy a used one in decent shape(which do you guys think I should do?)
9. Head- I’m not sure if I’m going to get a replacement one, or try mine.. It was beat up a little from the valve, but I took and essentially polished the combustion chamber with a die grinder which I know will lower my compression ratio some, but I don’t think it’ll be bad(I’m a mechanic which has come in very handy so far on this) I can post pictures and see what you guys think..
I’m completely open to suggestions on this entire thing, which is partially why I have everything listed out like it is.. If anyone has suggestions on a brand or type of part that I should get for it, just say so.. Haha I really want to do this thing one last time for at least a good long while and do it right, but I don’t want to throw an entire bank at it.. I’d like to keep it at a feasible budget.. Or any suggestions as to where to get parts other than eBay, since some things are kinda limited to find on there.. Oh and with the jug and piston deal, if I go with a replacement jug, should I still just go ahead and use this as a chance to go to a bigger bore? I noticed piston kits didn’t vary much in price due to bore size..
With this four wheeler, I mainly use it to ride around the country roads and zip around my farm, with the occasional light trail riding in a very remote wooded area/creek.. I have 25 or 26 inch tall tires on the back, and hardly ever have a second rider, usually just a cooler on the back.. I know with the taller tires on the back I’ve had it running continuously about 55-60 Mph before(riding next to a 420ES of a buddy…) thanks in advance guys.. I’ll get some pics up of everything soon, since I know that you all are picture lovers… lol
Two drain plugs Trx250ex?
2002 Honda Recon 250
400ex backfiring on decel
05 TRX90 Stalls on Quick Throttle Roll-on
I have a 2005 TRX90 that has very little hours on it, been in storage for past 7 years. I pulled the gas tank cleaned it, put on new fuel lines, bought a carb kit and installed it, new plug, checked air filter and put in non-ethanol gas. It now idles fine without the choke and if I slowly roll-on throttle it revs up fine. However, if from idle I quickly depress the throttle to max it just bogs and stalls. I have tried setting the mixture screw everywhere from 3/4 to 3 turns open and does same thing. The air restrictor cap has always been removed and other than an aluminum brush bar its completely stock.
I read everything I could find and don’t see anything that matches this issue.
Any help would be appreciated.
Thanks
05 TRX90 Stalls on Quick Throttle Roll-on
I have a 2005 TRX90 that has very little hours on it, been in storage for past 7 years. I pulled the gas tank cleaned it, put on new fuel lines, bought a carb kit and installed it, new plug, checked air filter and put in non-ethanol gas. It now idles fine without the choke and if I slowly roll-on throttle it revs up fine. However, if from idle I quickly depress the throttle to max it just bogs and stalls. I have tried setting the mixture screw everywhere from 3/4 to 3 turns open and does same thing. The air restrictor cap has always been removed and other than an aluminum brush bar its completely stock.
I read everything I could find and don’t see anything that matches this issue.
Any help would be appreciated.
Thanks
My TRX300FW build, No… Resurrection Thread!!

My wife inherited this low hour, ’97 TRX300FW from her late father in early 2006. He had changed the oil and drained the fuel tank for post-hunting season storage. Perfect!! That is, until the little prick my wife was dating at that time put a splash of fuel in to try to get it running; without her permission or knowledge. Naturally, he didn’t drain it afterwards and the results were as expected:
Even after I used a few methods suggested by members here to clean the rust out but never could get it where I wanted it. So, I found a decent metal tank on ebay as a replacement. At the same time, I also bought a Shindy carb rebuild kit, a YTX14-BS battery, and a tune up kit [plug, air/fuel filters] from Forward Powersports. Aside from replacing the fuel line, greasing everything imaginable and cranking it over [plug out] with marvel mystery oil or WD40 in the chamber, what else would you/should I do to return it to it’s former glory?
My TRX300FW build, No… Resurrection Thread!!

My wife inherited this low hour, ’97 TRX300FW from her late father in early 2006. He had changed the oil and drained the fuel tank for post-hunting season storage. Perfect!! That is, until the little prick my wife was dating at that time put a splash of fuel in to try to get it running; without her permission or knowledge. Naturally, he didn’t drain it afterwards and the results were as expected:
Even after I used a few methods suggested by members here to clean the rust out but never could get it where I wanted it. So, I found a decent metal tank on ebay as a replacement. At the same time, I also bought a Shindy carb rebuild kit, a YTX14-BS battery, and a tune up kit [plug, air/fuel filters] from Forward Powersports. Aside from replacing the fuel line, greasing everything imaginable and cranking it over [plug out] with marvel mystery oil or WD40 in the chamber, what else would you/should I do to return it to it’s former glory?