Eyewitness89

I might just attempt it.  Would be a bunch of grinding and welding.  But doesn't look like it would cause much of a problem. Except maybe on the steering end.

! yeah fish, I'd like to see it. Someone told me about it, but I was having doubts about it

Ok, well.. I'm gonna start this thread since I've already begun tearing apart the parts bike(well it was already mostly tore apart). Plans are to clean (lots of walnut blasting) the case. Rebuilding internals. Possibly going to remove the rectangular frame rails from parts frame, and weld them directly on top of my frame for a slight body lift. (Haven't decided on that yet). Definitely doing an oil cooler relocate since I'm 90% in mud and water. Hooking a toggle to the engine fan so I can kill it while in water and mud. Aside from these things, I will remain mostly a stock bike. 

I'm DEFINITELY open to ideas and suggestions. Remember this is a mud bike.

4 hours ago, toodeep said:

The very fist 85 250 BigRed had the 26t, mid 85+ was switched to the 27t. The 26T was treated as gold when these gear reductions first started.

There we go! I knew it was something like that.. I try to do some research before spouting off 😁

No worries fish.. I'm probably just gonna use them in the engine I rebuild and see if I cant blow this one up and play mad scientist fixing it lol

I'd be using new gaskets.. both motors ran. But I did take one down after the idea this morning and that's a no go.. other motor I picked up temporarily from a friend cause he needed cash.. kinda like a pawn shop deal.. he wants it back eventually if he can, but I'm free do do whatever with it.. he said it needed to be timed before it would run

8 hours ago, Fishfiles said:

I just done some research on the 300 primary gear -------  you mentioned 26T and it rang a bell  , I just looked and all 300s from 88-2000 and  the TRX250 Fourtrax from 86-87 and the ATC250 ES use the same 27T primary , there were two part numbers used for the  same gear , old number was  23120-HAO-770 ( fits 86-87 TRX250 A / TRX300 A + FW )  and new number 23100-HC4-750 ( fits 86-87 TRX250 Fourtrax , ATC250ES and 88-2000 TRX300 A +FW ) , so the part numbers  over lap --------- the clutch basket is part number 22100-HC4-000 , only one part number for all the years above 

 

So I don't know what model or year you really need to find a 26T primary  ... Are you sure you want a 26T ... I don't think I have 26T  , only 27T 

 

 

If I'm not mistaken the 26t was for a 16% reduction and was in the '85 or older.. and would require the bore to be machined as the shaft diameter was smaller.. so 14.5% should be plenty fine to keep me from stripping 1st and much less work. Also I think with the 26t you have to destroy the stock primary to get the brass bushing out undamaged.  So definitely 27t for me.

I know I'm way late on this thread, I did however want to share some advice pertaining to blasting. (I'm by no means an expert). I would highly advise staying away from glass bead on internal parts. It leaves a whitish powdery grit on everything. I spent countless hours with an actual brass wire brush trying to clean it off. Reason for staying away from glass is if not thoroughly cleaned out, it can get into moving internals and lock them up. Ie. Intake manifolds, cant get it all out, doesn't wipe off.

   I personally like walnut shell at 90 psi. I'm going to attach pics of the intake manifold off my 85 dodge that I "refinished" (still finishing). 

  Before and current pics (mind you I picked this truck up running for 500 bucks lol)

I'm planning on rebuilding one and over boring. I'm talking straight swap as is just so I can still ride while I rebuild the other. In 3 hours I'm straight outta oil. Burned off currently 

Ok... so I know in my intro that my 450 smokes bad.. definitely needs rings at minimum.  My wonderful devious mind just thought of a quick temp fix. I actually have 2 other 450 engines sitting here.. should I swap the jug and piston till I rebuild one of the motors to swap? Or am I tired and not thinking of everything?

Welcome fellow newcomer!

I was considering the 14.5% or an 18% but from what I read the 26t primary gear from an older 300 is hard to get, but the 27t I've seen all over Ebay. Reason I wasn't looking at the 34.5 yet is I do quite well as is and there are some places we ride that I gotta get thru fast (cops/trespassing). And the guys I ride with are far faster on stock bikes than I am currently. 

20 hours ago, Fishfiles said:

Welcome to the site ...  would guess SWLA is south west Louisiana ?  but your map point shows different , I am from SELA and also work on heavy equipment  --  I have one 450 with 14.5% and one with 34.5% , the 450s are geared low to start , you can run the 29.5 tires with the 14.5%  , but I'd go 34.5 

Yeah I don't know why I was map marked across the globe.. I got it fixed now

Hey yall, just saying hi, I just recently acquired my 1st 4 wheeler on a deal that I couldn't pass up. I got it rideable and have took it mudding. 

It's a 2004 foreman 450fm. The gearshift arm was broken when I got it, and it smokes. Also needed tires. Fast forward 2 weeks after getting her home, gearshift is fixed and she's sitting on 29.5 outlaws.

Next step is rings and a gear reduction. So since I'm new to all this, I joined to try to learn a bit. Guessing this would be a good time to mention that I'm a mechanic by trade on everything from helicopters to construction equipment (and certified!). So tools and general knowledge I have, just looking for insights on the more intricate details.