rebuild the 250ES and SX motors or upgrade to a runing 300?

[oscarmayer]

doing a top end rebuild will cost me about $500 for each trike. or i can get a good used 300 and do the rear swap and drop that in. What do ya'll think woudl be best? the 300 would only cost me about $350-$400 to do and that's with putting new rings and doing a basic valve job too.

[SYKO]

I would do the 300 swap, thats something I want to do later when I finaly snag a 250es again, I think a 300 in those are awesome. And you can get 4 stroke techs 300 big bore kit witch I think can go up past 400cc's I beleive, so in theory you could possibly have a 400es big red! no that would be a monstor!

[KillerBox]

I have a 1985 Honda 250ES Big Red. Am I understanding you all right, that I 300 engine will fit easily into this trike? What 300cc engine would be the easiest?

Thanks,

KillerBox

[SYKO]

THE OLDER trx 2wd 300 motor, but it dosnt just drop in, from what Ive read you have the change the rear jackshaft assembly out to make it work, there are think a few members here that have done it already try a search.

[HONDALUVR]

i Guess I Got Lucky With Mine ... Both Of Mine Were Low Hour Machines... And With Them Being Honda's They Should Be Reliable ...the One In My Signature Is Hondaline Loaded ... The Sx Has A Plastic Tank .. But Has Never Had A Tap Turned On It ....

[sandpuppi101]

doing a top end rebuild will cost me about $500 for each trike. or i can get a good used 300 and do the rear swap and drop that in. What do ya'll think woudl be best? the 300 would only cost me about $350-$400 to do and that's with putting new rings and doing a basic valve job too.

I don't see how doing a complete top end rebuild is gonna cost you 500.00 per machine.If you were to go and order all new oem honda part's then maybe close too it ,but even then that's stretching it.

Are you doing any of the work youself or sending it out,maybe that's what i'm not getting??

[rdlsz24]

Top end rebuild for my 200x was $150. $50 for the .020 over bore and a hone, and $100 for a new Wiseco. My valves and cam were good.

Rob

[oscarmayer]

the $500 is the follwoing stuff
bore/hone $60
new piston $75 shipped
top end kit $30 shipped
new valves (vale is burnt on 1 and other has 1 cracked) $50 shipped
valve job $150 (cnc as it's 100Xs better than lapping them)
odds and ends (hondabond, oil, papertowls, other fluids, cleaners) $50

total: ok so we are at $415. i gave some leaveway for anything else i needed so yea somewhere between $450 and $500.

a good used 300 is $250-$300 shipped no rebuild parts, only need jackshaft seals and new shaft boot and cleaners and such.

-----------------------------
the 200 has it way easier. parts are much more avaiallbe for it than the 250cc ones. the 250x has more parts even a racing piston but not the sx or es. it's considered the odd man out.

----------------------------
what year 300 engine should I consider using? i saw a 99 300 going for $159+$100 shipping

[SCRAMCHARGER318]

hey oscar if you need the drive boot, theres a guy on ebay sellin new ones for i think 13$. i got my 300 motor for 220$ with all the wiring,exhaust,carb. but it all needs to be rebuilt like yours. you know i think a 250sx with a trx300 motor pumped up alittle bit should be able to take a stock 350x, or at least until top end i think the 350 would drive back around ya. but a sx with all that torque is going to be great.

[200xman]

I picked up a Late 80's or early 90's (cant remember for sure) TRX 300 just for the motor to swap into my Big Red. The quad had a bad ring and pinion but was complete and running. I kept the motor, carb, airbox, headpipe, wiring harness and all the electricals, parted out the rest of the quad and actually made money. The rear end parts go for good $. I think I got around $250 for just the rear axle, brakes, driveshaft and swingarm. The bad rear is a pretty common problem so it might be easier to look for a whole machine. That way you have all the little odds and ends. The guy I bought the quad from just couldn't grasp the idea that I was parting it out to put the motor into a trike!:crazy:

[oscarmayer]

^hahaahaha

no one had a quad around here. i've look and of thei do have any quads they want premium $ for a pos. liek $1500 for one that doesn't run or runs very poorly and needs lots of work. they smoke crack around here. :(

[200xman]

That sucks since it's so much easier to get everything at 1 time. I found the quad on Ebay for $350.:D I'm 6'4" and 215# so the Big Red fits me good but it's definitely a little low in power stock. I am going with the 300 motor with a fresh top end, bigger carb and a cam for now. I am also changing the rear gears to a SX set for a little higher ratio. I am hoping to end up with more power and a higher top speed as well.

[mapyang]

That sucks since it's so much easier to get everything at 1 time. I found the quad on Ebay for $350.:D I'm 6'4" and 215# so the Big Red fits me good but it's definitely a little low in power stock. I am going with the 300 motor with a fresh top end, bigger carb and a cam for now. I am also changing the rear gears to a SX set for a little higher ratio. I am hoping to end up with more power and a higher top speed as well.

Hey 200xman I have that SX rear end that I Owe you. And remember I have first dibs on that Big Red motor.:p

[oscarmayer]

aww snaps!!! :P

yea if i do the 300, i'm goign to take my time and really tweak it out and go with a weisco piston and 1mm over bore and larger vavles, THEN turbo that bad-boy! yea i said turbo.......

wanna know my expirneces with turbo charging? how about hand build 96 civic EX 1.6L singe cam car built to the gills made voer 500 tot he wlees in hp and took 2nd at it's first race. it was a natinmal competation too! i had the smallest motor competing and i even had as nad power steering in the car. it's a street car!!!!!!.
www.oscarmayer.net gives info. i sold it 5 months ago to a friend whom helped build the motor, so he's redoing the motor and tweaking it some more.

anyway, yea, turboing for me is easy. so i'm going to try turboing the 300 if I do the swap.

[The Goat]

hey oscar if you need the drive boot, theres a guy on ebay sellin new ones for i think 13$. i got my 300 motor for 220$ with all the wiring,exhaust,carb. but it all needs to be rebuilt like yours. you know i think a 250sx with a trx300 motor pumped up alittle bit should be able to take a stock 350x, or at least until top end i think the 350 would drive back around ya. but a sx with all that torque is going to be great.



If you're not joking you're insane. If a 200x beats a 250sx stock for stock, and a 200x beats a trx300 stock for stock, how will a 300sx touch a 350x... I'm confused here... I must be. Lol

A 300 has about the shortest gearing and slowest revving engine ever. It's.... Slow.

[oscarmayer]

^ unless you boost it! ;)

[SCRAMCHARGER318]

If you're not joking you're insane. If a 200x beats a 250sx stock for stock, and a 200x beats a trx300 stock for stock, how will a 300sx touch a 350x... I'm confused here... I must be. Lol

A 300 has about the shortest gearing and slowest revving engine ever. It's.... Slow.

well to be honest it might just be a wet dream, but with the sx gearing, and the insane amount of torque a 300 has, i think a 300sx would move pretty good. gotta remember even 2wd 300 weighs almost 200 pounds more than a stocker sx.
also i'm gonna pump mine up a little, wiseco 10:25 to 1 piston, 2 nd biggest web cam, port job,exhuast(which is already done), hot cdi box, 200x front end on the sx. i know it defenitly wont take a 350x top speed, but it might be a good 300 fot race anyway. i can dream cant i:lol:

[oscarmayer]

hahaaha now that's funny right there! :lol:

[aproudcanadian]

i just recently purchased a running 300 for 180 bucks that had a bad axle and plastic, used the engine , carb and all the wiring and it works great, big improvment, more reliable, more mods for the engine and a rev limiter. lets just say when i shift to 5th it will bring the front tire of the ground with a 200x front end.

[Pimpin89Sdime]

Well I know this is a bit off topic.. but for $320.00 I have a 250SX engine for sale... Run AWSOME.. I will include all wiring stater.... harness... kicker, shifter.. the whole 9!

there you do! then its original and your not messing around.

let me know if your interested.
Dan

[oscarmayer]

hey pimpin, sounds sweet! i have to wait till after i finish this 200 and sell it and then the 110 and sell it. i have the 110 sold already once it gets built. I have to find a solid buyer for the 200s.
going to ask $650 for it. new top end and bottom end is gone through and resealed. so it's goign to be like a new setup. I'm also putting new cables. (breaks and throttle)

[userj8670]

SCRAMCHARGER318- can you post a video of your modded sx....i am trying to do mine up and i am looking for ideas. Would love to hear what it sounds like!

Jim

p.s. pics are nice to!

[oscarmayer]

yea!

hey how come no one has told me what year 300trx engine I should get? i do remember reading that the later years will nto work at all, but what years will? will any pre 2000 work?

my 250es is going to be fairly stock except maybe a piston upgrade, but the 250sx i would love to go hog-wild on with a 300 trx motor and even work that up with a big-bore kit and stuff. I would even consider turboing that if I get a good piston and such. No kidding on that either.

[Pimpin89Sdime]

kk let me know if your ever interested in will be here I am sure for a bit!
Dan

[aproudcanadian]

im not sure how to put a video on here but i would be glad to put one on here for every one to see, ill take a video tomarrow after i get home from work

[tri-Z ripper]

hey oscar my buddy and his partner are the sole creators of www.turbokits.com they are the exclusive turbonetics dealer his name is grant if you call tell him you met shane on 3ww and he will try to hook you up with what he can!!

[oscarmayer]

im not sure how to put a video on here but i would be glad to put one on here for every one to see, ill take a video tomarrow after i get home from work

you can use my ftp upload and i'll post it for ya

[oscarmayer]

hey oscar my buddy and his partner are the sole creators of www.turbokits.com they are the exclusive turbonetics dealer his name is grant if you call tell him you met shane on 3ww and he will try to hook you up with what he can!!

SWEET! I'll do that once i'm ready. my biggest concern is mid-range tune with boost. if i'm goign up a hill and not standing on it and it's still seeing some boost, i need to make sure it's getting corect fueling. with a carb that concerns me. i'll have to research some electrical EFI ssytems. that may be the better way to go. BUT! i will test the carb way forst as it will be a TON cheaper!!!

[oscarmayer]

I still have not recieved a solid answer on what year(s) trx 300 do I need for the 85-86 250SX? i have seen 99 300trx motors going for $400 in good shape.

[aproudcanadian]

mell the engine in mine is from a 89 but pretty sure all years are the same, i do no the earlier modles up to 92 have a higher rev limiter and something else different

[oscarmayer]

oh ok cool! so any year will work sweet! that helps a lot!!!! TY sir!!!!! i'll get me a 300trx motor when ready and tear it appart and have fun!!
asside form the motor and carb, what else do you recommend? (harness, boots, electrical stuff needed?)

[aproudcanadian]

i used all the electrical except for the coil, the 300 harness plugs into the 250 ones, u will need a starter since the 250 and 300 starters are different. i used the 300 dash since the key switch is to small for the 250 dashes, and there are 3 lights instead of just 2, the extra is oil temp warning light. you will need to make an adapter since the holes are narrower. i had to driill a hole for a new ground up by the front of the frame on that thin peice . the air box will need to be modded some, i cut the hole bigger on the front and used the 300 boot and air filter, the tab that holds the filter needs to be cut off and the metal tab on the back of the filter needs to come of because the filter is placed back farther. to get the head light to work just cut the 3 wires from your 250 handle bar switches, the green, blue and white one and put that on the 300 harness, the wire colours are all the same. the head light will be a pain to get on because theres alot of wires behind it and the cdi box is going to be at the front instead of the back, theres another box that ill be up there to.

[Mondexbrute]

Why dont you guys post pics of all this stuff!

[schneed]

Pics or vids of the Big Red please!