500R dreams

[BigGreenMachine]

I see where your coming from and I like the idea a lot. I think the reasoning behind it is you could chug though the tighter trails and not have to clutch it to keep moving over the most technical obstacles. I'd go with a torquier aircooled 480 CR or 500KX motor and gear it like XBasket said. Also would use the Aircooled R chassis if the sprocket sides of both bikes are correct. The extended swinger would help in the trails, especially when your trike comes on the pipe on a hill. I have a +2 on my T3 and it still comes up when I don't want it to, wheelying "off" the beaten path isn't fun on a 250, let alone a 480 CR. I would think a +2 at least on an chassis. Mine doesn't hinder turning at all and I ride some of the tightest trails. Just keep the stock width axle because the extended axle cuts down on how many lines you can take through an obstacle. Skidplates and taller 22 inch tires, 9 inch wheels are a must to keep above rocks and all the other sharp/solid crap. I want one now. lol

KASEY said:

,,,, the nice thing about it was very little shifting ,, it use to piss off the bike guys when they were behind me cause 2 11" wide tires throw alot of mud when they are spinning 70 mph in the mud!!

Thats one good reason to do it...

I have my Tecate geared way low, so much so that 5th gear is useless on a straight. The low gearing is so that I don't have to do so much clutchwork in the woods to get over slow/technical obstacles that you can't get into the powerband on. Hills are a 3rd gear, tires spinning moving me foward but not lifting the front end on me situation but I would really like a torquier motor. I'm soon installing my MX ported cylinder and shaved head to make the motor a little stronger off the bottom. An issue that wouldn't need to be addressed with a big bore, aircooled pinger.

rant off

[monster 84r]

im with most of you guys, i think a 500 cr conversion for trails would be serious overkill. if your so intent on having a 500 tcb, why not check out the sabertooth 500 top end kit? that way you dont have to go through all the work of making the cr motor fit.

has anyone tried putting a 480 motor into an airpinger? how does it fit? if its feasable id try it.

[RideRed250R]

i have seriously searched about the conversion... seen pictures and i might pull it off in the summer along with a 370 power valve R...with the 480 your problem is all the mounts sound jsut be ground off... no need.. witha cr500 in a water pumper chasis you have to dimple... grind off the mounts.. fab new ones up and your done... now its not that easy but far less then the air cooled... air cooled basically you can just cut all motor mounts from before off... and cut the two braces in the rear of the cage... now set the motor in and from there its all fab.... i dont know if you have to dimple the frame or not... but all your new mounts have to be super duper strong as its going to be holding the motor DIRECTLY to the frame... with a cr500 into a atc250R waterpumper you can sorta rubber mount it... and some of the mounts you can use..... as for TCB... get a 265PV...still be one heck of a ice racer... an done heck of a tree shooter... if you want more power.. get a 310 send it off to saber, trinity or DMR all places will bring it to about 65-66 RWHP with the right tune, and parts,

here is your starting point
39.R PWK
TNT DMR CDI
Vforce Reeds
Upp intake
265PV-310 big bore kit
PT HR pipe
and call it even.. there will be more pwoer then you will ever need... my 310 with my current dialed in jetting (DEAD ON MAN) the thing wont keep the front down anywhere near the torque curve or powerband... like i said if you wanna roll down the competition honestly look into a stroker 370 motor... that might be my next move....
Adam

[250r'en +TCB]

im with most of you guys, i think a 500 cr conversion for trails would be serious overkill. if your so intent on having a 500 tcb, why not check out the sabertooth 500 top end kit? that way you dont have to go through all the work of making the cr motor fit.

has anyone tried putting a 480 motor into an airpinger? how does it fit? if its feasable id try it.

I found the sabertooth 500 kit you were talking about. http://www.cpindinc.com/index.html But in their site it dosn't really say what exactly you do in order to run one. Do they just cell the cylinder and you bold it on to a 250r crankcase or something!?!?! I need more esplanation on this subjest please, I am defiantly interested in this kit all of the sudden.....
Thanks, Devin

[cr500=3wheeler]

try this link instead might find a little more info on the sabertooth cylinder
http://www.saberracing.com/

[Bigbore]

The Saber Tooth kit is a novel idea, but not practical. For the cost of the Saber Tooth kit you could buy the CR500 motor and still have money left over for a new +4 swinger. I wouldn't EVER buy a 500cc kit to put on a 250cc case. The clutch as well as most of the rest of the internals won't last long, i.e. shift forks, gears, crank, etc. I have a Mugen 360cc on an '81 and it’s almost too much for the 250cc cases. I know the first thing that you’re thinking... The '85 and up cases are stronger. No their not. The crank and the bearings are almost the same size. Besides, why ???? Spending thousands of dollars to get a 250 to put out 30 to 50% more power, when a stock CR500 will double the hp for $1,200.

Anyone that thinks a 500cc is too much for trails hasn't ridden a 500 on trails. Personally I wouldn't ride anything smaller than a 500, unless you’re with the wife and kids playing. Who wants to manipulate a powerband, keeping their machine from stalling like you have to do on a 250cc. Then again most of the country doesn't have trails like we do in Colorado.

Rideable Colorado trails will take you from 5,000' to 13,000' in a real short time. Tight trails with serious drop-off's and trees and downed timber all over, the last thing you want is an underpowered machine. CC's are the best cure. I’ve ridden my 250R at 14,000' and had to get off to push it up the small hill to get going again because the lack of power at that altitude.

If anyone wanted to do something cool for our 3 and 4 wheelers is come up with an EFI like the open, or even a closed, loop system Holley Projection but for the smaller engines.

Best motto for the power hungry... "Its better to have it and not need it... than need it and not have it".

[conig]

short and long term diability, seriously look into it.

if its what you want do it, but I as well think it would be hard to handle and a plus 4 won;t decrease trail use that much if any.

[BigGreenMachine]

I think a +2 and CR480 motor in a 83/84 Fooler chassis would be fine. Gear it so you can torque your way over the rough stuff without much clutch use. I guess that would be the biggest benefit over the two fifty. Where I ride, if you get on the pipe, in most cases you'll end up off the trail in the evergreens. Lots of chugging along/clutchwork where a fourstroke or torquey (spelling) big bore would be a choice weapon. Ever consider a 350X? It would suit your riding just fine.

[Ryah]

I've got a CR500. It has a moose weld on flywheel ( I think it's Aloop now), biggest they offered at the time. It really tames the motor down. It's a 90 so it's no where near an 85 or 86. Had both of those too. Keep it stock with a flywheel weight and it's powerband is like the old fabled Maico. It will make a great woods bike. You don't have to use all the throttle, it's just nice to know that it's there when you need it.

[BigGreenMachine]

Exactly, the throttle works both ways.

[dufrain]

Im Not sure about the 83, 480 but the 82 only had the 4 speed for motocross only transmission .It was like having 2-5 and sucked bad in the trails even being in a dirt bike.It was worse than having a jumpy low first gear since at low speed it would bog then you gas it a little more to keep from killing it and snap, it turned the tire over alot and your looking at the sky.I would way rather have had a low first and controlled it with the throttle.The 4th gear was easy to wrap out on a good straitaway.Those ratios were picked for the track by Roger Decoster and just suck for trails.I would definately go for a wide ratio trans 500.The 87 cr500 was a brute,the gear ratios in that were a lot wider .If the 83 has a 5 spd trans air cooled would be alot easier to stuff in that frame.Whatever you end up with make sure you have the rear brake set to Hair trigger .

[250r'en +TCB]

Yeah the 83 480 definatly seems like the way to go, the 5 speed is a must.
Now I researched more into the saberooth 500, defiantly not a cheap or reliable ride by ANY means!
So I have come to the conclusion that when i get around to doing this I'll be using the 83 480. Now as for what to mount it in I'm stuck. Billy says make my own frame, but could I just mount it in a 350x frame? Beef up the brakes for sure!!! hahaha suspension to!
Off subjest on the brakes for this beast, has anyone ever put rice rocket front brakes on a trike? You know the dual double piston calipers up front??? Seems like it would be possible, and it sure wouldn't hurt when riding this puppy!! I'm proubly gonna need ALLLLLLLLLLL the stopping power I can get! Remember this dosn't just have to go down a 300ft strip and eventually stop, it's going to have to stop suddenly on new england's trails......

[thefox]

I’ve ridden my 250R at 14,000' and had to get off to push it up the small hill to get going again because the lack of power at that altitude.

If anyone wanted to do something cool for our 3 and 4 wheelers is come up with an EFI like the open, or even a closed, loop system Holley Projection but for the smaller engines.

Doesn't a dial-a-jet do this?

[BigGreenMachine]

Rice rocket brakes would be overkill I'm sure. XBasket put a ninja 250 caliper on the rear of his old second gen Tecate.

The 480 and aircooled frame man, forget the 350X and its frame cracking issues. Get the , a chassis made for a shakey pinger. Brace that frame at every point you can for the extra stress its going to have to endure and bolt on some fresh calipers/masters and you'll be set.

[200x Basket]

it was a 750 caliper and it worked great.