View Full Version : need help with my 84 250r atc!!!
thejake456
12-13-2008, 01:33 PM
i have a rolling chassis and was wondering if the swing arm from a 85 would fit on my frame? i wanna use the whole rear end from a 85 250r insted caus the motor that i have is an 86. and as you all probably know they switched the sprockets from the right in 84 to the left in 85. so you see my problem! please help me asap!!!!!
no it wont work way differnt and not even close enought to modifie easily to make work, and the shock mounting areas are drasticaly differnt as well.
big negative captian on that one
welcome to the site non the less!
thejake456
12-13-2008, 01:40 PM
well is there any way i could just like flip the axle? or wouldnt that work either?
thejake456
12-13-2008, 01:42 PM
is there any bigger motors that are older with the srocket on that side that i could stick in the frame? like an older 500r 2 stroke?
Blown 331
12-13-2008, 01:43 PM
This doesn't help you at all but it is kinda related. Somewhere on the net I saw a liquid cooled motor in an 83/84 250R. I beleive there was one year of CR250 that was liquid cooled with the sprocket on the right side (same as air cooled 250R). Pretty neat.
Blown 331
12-13-2008, 01:44 PM
is there any bigger motors that are older with the srocket on that side that i could stick in the frame? like an older 500r 2 stroke?
Yeah CR450 or CR480.
you could flip the axle but your brake mounting points wont be right and its just not a feasable thing to do, plus there is no way either the 84 shock or the 85 shock would work on the 85 swinger in a 84 250r. unfortunatly the 2nd gen Rs have a tough swinger and rear suspension design to go around, were is my 85 250R has all 05 trx450R rear suspsion.
you may contact a company like HRE who could make you a new swinger for your air fooler, im sure there would be more interested at there are alot of 2nd gen riders here.
thejake456
12-13-2008, 01:45 PM
i was actualy trying to find a bigger motor. like a 500cc. does any one know if there is any sights where i can find aftermarket parts for it?
also putting in a liquid powerplant wont be that hard but now you got to figure out where raditators and othe rparts go, plus the intake on the liquid goes to the left a bit where is the intake on the air cooled is straight back to the airbox. One thing or another you will be better off having a air cooled motor in the air chassis and the liquid in the liquid chassis.
i was actualy trying to find a bigger motor. like a 500cc. does any one know if there is any sights where i can find aftermarket parts for it?
lol this site post up a classifieds add, most members either have or no where aftermarket parts are located
a 300 kit is for sale right now for the air cooled motors.
thejake456
12-13-2008, 02:07 PM
another question, if i were to just get a 84 250r motor. how fast would it go? if i put enough money into it?
pm 1upfront, he drags a air cooled 250R when I had my 83 with a 300 big bore on it ,it was slightly faster then my piped and carbed 85 250R.
will going 90mph make you happy? then just regear it. Most air foolers top out around the 65mph mark, depending on where you ride you would rarely see that.
in my op the 2nd gen 250Rs are some of the best trikes ever built
this was my 83 I built and sold
http://i42.photobucket.com/albums/e306/southgacustoms/atv%20riding%20and%20racing/100_2505.jpg
http://i42.photobucket.com/albums/e306/southgacustoms/atv%20riding%20and%20racing/TrikeRace014.jpg
thejake456
12-13-2008, 02:50 PM
wow, yes that would make me very happy to go 90mph! but wont re grearing it take away from the power? and where i ride i want it to have power! well would they compete with a 250 2 stroke bike?
ps nice trike!!!
no I being stupid about 90 mph, yes that type of gearing you will loose all bottome end and take off...
if you want power like hillclimbing and fast trails you dont need to be able to go 90mph you want tourqe and low gearing
thejake456
12-13-2008, 02:54 PM
Yeah CR450 or CR480.
i would really like to find one of these. my 250r would have to ripp if i stuck one of these into it!
just becouse you have a bigger motor dosnt mean its going to be faster, if you can controle it then yes its going to be faster.
have you acutally ridden it yet? or even a 250 size 2 stroke trike? and not just one time at your cousins house a few years ago either, like regularly?
thejake456
12-13-2008, 04:57 PM
trike? ya i have ridden a race 250r, and my friends little atc 70. i have had several bikes and quads bigger than a 250cc. ive had an xt500, cr250, 400ex, blaster. and have ridden all kinds of stuff so there isnt any problem if i can handel it cause the answer is yes!
well be ready for some measuring, cutting, and welding, becouse other then the original motor nothing will just drop right in, then after that the suspension better be good becouse lots of power and old worn out suspension will spell dissaster.
do your homework first there are a few big air fooler conversions on this site that are being done and have been done.
Dont forget it all takes money, and be prepared for a sudden loss of it at times!
thejake456
12-13-2008, 06:57 PM
yes, i also think it will be rel unique because i dont know anyone who has an offroad machine that the sprocket and chain is on the right side. they were made like that only in a hand full of years too.
81-84 but countless years like that from the 70's through the 80's on the dirt bikes.
thejake456
12-13-2008, 10:47 PM
what is the benifits of having a liquid cooled engine other than an air cooled one? besides the obvious of it cooling down faster and staying cooler.? would it make it any faster?
there are so many variables as two why the liquid is faster and not just becouse its liquid cooled either, totally differnt port configuration, crank and pistons, stroke length, pipes, carbs, trans etc etc...
the good thing about air foolers as you can stop and idle for a min or two in a trail where you may over heat a liquid doing the same thing
but the air foolers are loud resonating sound from the fins
you can make anything fast with the right mods and the right amount of money.
thejake456
12-14-2008, 01:39 PM
ok well thank you all for the help. i will put some pics up when i am done building it. Does anyone know where the best cheepest place to get something chrome or nickle plated is?
thejake456
12-14-2008, 01:44 PM
and what size carb should i get for it? i want an aftermarket one. any suggestions?? is there any shock off of a different bike or quad that will directly bolt up to my r so i will have more travel?
you need to do some searching on the boards here, all your questions will be answered
carb the stock carb off the 85-89 250R will help out greatly any bigger then those you need to have a bigger motor
as for pipes try to find a older style sectional the dg is only marginaly better over stock I had a rare jemco and it ripped, but are still avail from jemco if you contact them
no no shock has been known other then the stock shock to work, they are at rated so much differently due to the linkage and angle they are set at, send it out to get resprung and revalved for your weight and riding conditions there is a member here doing that as well.
you can upgrage the front suspension with forks and trippled from the 85-86 250R
and if you do any kind of hard riding chrome and nickle wont last to long, powdercoating is the way to go, and we have members who do that is well
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