putting a counterbalancer on a cr500

[no_doz]

anyone know how to do this or any companies/people that can?

[Red Rider]

I'm not going to say it can't be done, because anything is possible with the right kind of determination, but that would take some major modification to the bottom end center cases to install a counterbalancer, as it would need to be right at the core of the motor & geared off the crankshaft.

[ridetrikes250R]

hmmm... may i ask... Y? yah they rattle but hell its a 500cc twostroke with ARM RIPPING POWER!!! y the heck would you want to run a counter balancer, i mean it would smooth it out alittle but still not worth the money your going to waste to put it in and get it to run right, it would basically like sandman said a brand spankin totally custom bottom end, and it wouldnt do anything for performance, rubber mount the engine like a road king and it wont shake anything but itself
adam

[no_doz]

how would i go about rubber mounting the motor? i want to turn a cr500 into a quad but unless i can keep it from rattling the frame to pieces its not going to last at all.

[ridetrikes250R]

first of all, i wouldnt turn a cr500 into a quad, its to much fab work and never going to handle well.... i would say find a TRX250R or a LT250R perferably a TRX and rubber mount the motor in there, its the only way i could see a fast reliable and fun bike.
adam

[no_doz]

how do you rubbermount the motor though!?!? and by the way, why wouldnt it handle well?

[Oldschoolin86]

Originally posted by no_doz
and by the way, why wouldnt it handle well? Because if you turned a bike into a quad it would be like turning a trike into a quad, those astro type kits suck ass. You'd have to completely make a custom frame and then that really wouldn't be "turning" it into a quad. If you want a 500 quad then stick it into the trx frame.

[my90rulz]

Suck it up the vibs are not bad AT ALL on cr500's or any other big bore bike for that matter.....it vibrates compared to a 250 yes but once you get used to it you are fine,,,,,,,,,really people over exagerate it ALOT....my .02 cents

[CHAINSAW]

Here is how you add a counterbalancer to a 500


http://www.cpindinc.com/products/honda/TRX510R/TRX510R.html


Just buy the sabertooth cylinder and be done with it.

[JxxxOxxxE]

Originally posted by CHAINSAW
Here is how you add a counterbalancer to a 500


http://www.cpindinc.com/products/honda/TRX510R/TRX510R.html


Just buy the sabertooth cylinder and be done with it.


Will a regular 250R trans/clutch/internals hold up to that though?

[CHAINSAW]

As long as you just keep it on gas, and a basic port job they say everything will hold up fine.
the only time Ive read that the bottom end blew up, was one putting out 151 HP with a turbo charger... :D

[JxxxOxxxE]

Hmm...I wonder if its cheaper to buy a 500 motor, fab the mounts, and get it to work, or to buy the head and go from there....?

That place is only about 2 hours north of me here in Oklahoma...

[bigyellow4x4]

how ridable is the lower power band all the so is like 5,000 rpm and up? i thing that alcohol would be the thing to do so it runs nice and cool??

[my90rulz]

Originally posted by bigyellow4x4
how ridable is the lower power band all the so is like 5,000 rpm and up? i thing that alcohol would be the thing to do so it runs nice and cool?? The cr500 chugs threw the bottem end into a explosive mid range quickely followd by a screamin top end....good nuff analogy for ya?

[no_doz]

Originally posted by my90rulz
Suck it up the vibs are not bad AT ALL on cr500's or any other big bore bike for that matter.....it vibrates compared to a 250 yes but once you get used to it you are fine,,,,,,,,,really people over exagerate it ALOT....my .02 cents

IM not worried about the vibrations, what im worried about is the fact that every time ive seen someone turn a cr500 into a quad the vibrations have destroyed the welds quite quickley.

and what im doing is getting a cr500, putting a quad swingarm/rearend on it (whatever fits best), fabbing a mount for the rear shock on the frame, then welding a quad frontend onto the front of the R frame and possibly adding nerf bars. now can someone PLEASE tell me how to rubbermount the motor, everyone seems to say that is the thing to do, but no one can seem to tell me how to do it!

[no_doz]

oh hey and how much do those cylinders cost, im betting its a fortune and everything including the cases need modded.

[my90rulz]

The only reason it should rattle the **** out of it is 1. they cant weld properly , 2. they did not balance the motor in the frame worth a ****...if your usin the orig bike frame you have nothin to worry about.

[Mr. Richard]

sorry 90 boy ,,, you totally wrong on this one!! put a cr500 motor in a good trx frame and it will break it all up ,,, ever heard bof harmonic vibrations? on a trike the front forks absorb alot of vibrations ,, just like on a bike . but in a trx frame they reverberate around till something breaks,,,,,it has nothing to do with bad welding or balancing an engine,,, 500 cc engines (single cylinder versions) VIBRATE ....

[no_doz]

thank you kasey! now, how would i go about rubbermounting one of these babies??

[my90rulz]

Yes the vibrate, but you less the chance of breakin the frame by usin proper welding n other junk..........:rolleyes: :doh:

[JxxxOxxxE]

I think I am going to email that company and see what kind of prices they are getting for that cylinder and machine work...

[no_doz]

Originally posted by my90rulz
Yes the vibrate, but you less the chance of breakin the frame by usin proper welding n other junk..........:rolleyes: :doh:

well of course, but no matter how good of a welder you are, a cr500 motor will break the welds with enough time... now will someone PLEASE tell me how to rubbermount one!!!???

[no_doz]

Originally posted by KASEY
sorry 90 boy ,,, you totally wrong on this one!! put a cr500 motor in a good trx frame and it will break it all up ,,, ever heard bof harmonic vibrations? on a trike the front forks absorb alot of vibrations ,, just like on a bike . but in a trx frame they reverberate around till something breaks,,,,,it has nothing to do with bad welding or balancing an engine,,, 500 cc engines (single cylinder versions) VIBRATE ....

oh correct me if im wrong but, if you counterbalanced the motor then i believe it wouldnt have as bad/as many harmonic vibrations & shouldnt break good welds, otherwise id figure quadzillas wouldnt be around anymore (unless the motors are rubbermounted but idk).

[CHAINSAW]

I thought quadzillas had counterbalancers...

[no_doz]

thats my point, if the didnt have counterbalancers i doubt theyd be around anymore because their frames would be hosed and not many ppl would have bought them...

[my90rulz]

We put a CR500 motor in a ALUMINUM CR250 frame and have Not had ONE single crack whatso ever....yes they vibrate, rubber mounting it i think would hardly be worth it the way im thinkinh, (old sled style with BIG rubber grommets between the bolt and the mounting surface)...just my .02 cents.

[Mr. Richard]

We put a CR500 motor in a ALUMINUM CR250 frame

hmmmm , hasn't service honda been doing that for years????
see your not so SPECIAL,,, BIKE FRAMES DISPERSEvibes through the suspension,,, AND ALOT OF FRAMES DON'T CRACK IN THE WELDS EITHER ,,,, :D :D :D :D :D :D

[JxxxOxxxE]

instead of rubber mounting the motor, why not use some polyurethane (sp?) sway bar bushings off a car?

[my90rulz]

Originally posted by KASEY


hmmmm , hasn't service honda been doing that for years????
see your not so SPECIAL,,, BIKE FRAMES DISPERSEvibes through the suspension,,, AND ALOT OF FRAMES DON'T CRACK IN THE WELDS EITHER ,,,, :D :D :D :D :D :D Yes i know service honda has been doing it...lol :doh: :doh:, just simply saying, that if he is using the bike frame, which he said,,,then he wouldnt have a problem,,,,,,,,,,,make sense?:confused:

[Red Rider]

Originally posted by my90rulz
just simply saying, that if he is using the bike frame, which he said,,,then he wouldnt have a problem,,,,,,,,,,,make sense?:confused: But, once you turn that bike frame into a quad frame by putting quad suspension on it, he will have a problem. Does that make sense?

[my90rulz]

Originally posted by Red Rider
But, once you turn that bike frame into a quad frame by putting quad suspension on it, he will have a problem. Does that make sense? , why would it, it is still the same engin cradle all up to the rear subframe.....?

[Red Rider]

My90, as Kasey previously stated, "because of the harmonic vibrations." If you take 2 identical CR 500 bikes, leave one as is, and turn the other into a quad by welding on a front subframe with a-arms & 2 wheels up front & a swingarm with 2 wheels out back, the quad is going to vibrate worse. The bike, being unstable, has the ability to vibrate side to side & front to back, so the vibrations have an easy exit. On the other hand, the quad, being stable, resists side to side motion, and the vibrations don't have an easy way out, so they bounce & reverberate around inside the frame, which eventually leads to cracks. For a visual demonstration of harmonic vibration, do a search on the web for "Tacoma Narrows bridge."

[my90rulz]

Ah i was thinkin wheeler....but i see now...gotcha,...boy i look stupid now :doh: :lmao: :lmao: :lala:

[bones200x]

I have rode a CR500. Vibrations? Only at idle I felt a little. I was tooooo busy holding on to notice any other vibrations. AWESOME engine. I would love to ride one in a trike or quad.
A friend of mine "knew" of a guy that had a CR480 engine in a ATC250R. He said it would FLY...
That is my 2 cents worth. GOOD LUCK.

[Mr. Richard]

http://www.artistdirect.com/Images/Sources/AMGCOVERS/music/cover200/dre300/e392/e392423h3dn.jpg

CAN YOU SAY HALALUYAH!!!!!! I HAVE BEEN VINDICATED!!! cr500's don't vibrate like everyone who doesn't one says they do,:lmao: :lmao: :lmao: :lmao: :lmao: :lmao: :lmao:

[no_doz]

hahaha my uncle that works on quads already enlightened me to all of this, and i surely never claimed that the vibrate a lot, like he originally told me-people dont notice the vibration of the bikes because it translates out so much easier than on a quad... lol how to i rubbermount one??

[mart]

I was searchim some old threads and found this thought some of you guys might be interested in my latest build.:)

http://www.ozatv.com/forum/viewtopic.php?t=11107
Make sure you read the whole thread gets interestin towards the end.

[no_doz]

mart, ur the MAN. i knew this could be done altho after TONS of looking into it i determined that making a PV 250r or kx250 twin would be a much better option (sadly), & after plenty of searching on that topic i determined that different top ends on a banshee would be best, which i refused to do cuz wheres the fun in that?

great build, heres what the quadzilla counter balancer setup looks like.

http://www.bikebandit.com/1988-suzuki-motorcycle-lt500rj/o/m6397

[no_doz]

hahahaha i just got done watching some of your dune vids & that thing looks like you can barely touch the throttle without it torquing like a MOFO.

after all my searching i determined that 2 cylinder 4 strokes built *right* were the way to go.

also, with your kickstarting setup & your skills, it shouldnt be too hard to install a starter, altho bracing/strengthening the case around it would most likely be wise due to the stresses involved.

i have an uncle that lives real close by, had a CR500 for a few years & broke/cracked the **** outta cases on it (hes a ****in BEAST if you knew him, but still that just blows!!)-i figure all these things are wonderful challenges for you to show of your mechanical/engineering prowess-i cant wait to see more!!

ALSO-the energy from the vibrations HAVE to go somewhere, on 2 wheels it can be translated back & forth or side to side with little notice to the rider (these movements will be ever so small), but with a quad all of that has to get absorbed/put *somewhere*, & side to side isnt free to wiggle (sorry, my terminology is crap, if anyone would like to give me physics/engineering terms, id be ever so greatful)-meaning that once the bike absorbs enough energy from the vibrations it will vibrate until it equals out with the source, or continue putting out vibes until it does, & once all the parts of the quad are vibrating enough it will begin to make you do the same until it all reaches a sort of equilibrium.

if youd like an example, play around with a crappy aquarium bubbler that makes a decent bit of vibations from the pump, then try & set it on something hard & flat to hear the buttloads of vibrations that come through, then start trying to completely eliminate those vibrations...have fun... NOW think of the massive hunk of metal whipping around inside of those 2S 500's & how where all the vibration energy can be put-seems like youd need a good amount of rubber to dampen them to even acceptable levels, let alone while trying to hang on!

hmmm... maybe some sort of piezo-electric alternator could be used to eat up the vibration energy & turn it into electrical energy, which is exceedingly easy to dissipate/waste :P

[mart]

Thanks mate its almost ready to start again an try it with the standard crank in it.it deffinately makes a huge difference its just im thinkin its gunna be needin more weight.but yeh it sure has made the world of difference cant wait to try it with this crank setup.:headbang:

[crackshot]

hmmm... may i ask... Y? yah they rattle but hell its a 500cc twostroke with ARM RIPPING POWER!!! y the heck would you want to run a counter balancer, i mean it would smooth it out alittle but still not worth the money your going to waste to put it in and get it to run right, it would basically like sandman said a brand spankin totally custom bottom end, and it wouldnt do anything for performance, rubber mount the engine like a road king and it wont shake anything but itself
adam

I don't know about "arm ripping power".

[ridetrikes250R]

you can ride either one of my atc500R's and tell me how they are... a well ported CR500 makes a 250R seem like a blaster, i still love the 250R's they are pipey little suckers, but the cr500's are a different story...

[NOS_350X]

you can ride either one of my atc500R's and tell me how they are... a well ported CR500 makes a 250R seem like a blaster, i still love the 250R's they are pipey little suckers, but the cr500's are a different story...

Soo when you going to come race one of my R's?

Ill let you pick, The stock cyl 250, OR the Cr cyl that comes out to be some where around the 235=240cc range.

500's are not a fast motor, They can produce some decent power but arnt fast.

[ridetrikes250R]

as soon as my ass is ready the truck will be headed to Lemoore.

ill line up with the sprint motor any day of the week.

99% of CR500's are bone stock that you run up against, a pipe and jets does not equate to modifications in my book.

I agree Nick that 250r's are quick and that a well ported 250R can run/beat a cr500. BUT, a ported CR500 and a PORTED 250R are a different story, HI REVVING power does not get you dont the track the fastest, the bike with the most power/torque and gets there the quickest in its band, will win the race.

[NOS_350X]

Power and torque will get ya up a hill fast. BUT in 300 ft is all about the RPM's

:salute: COME GET SUM :loser:

[no_doz]

no lie there-hp wise any of the PV 250's arent far from the 500's at all.

[jensenracing77]

if you want a 500 2 stroke in a quad, why not just get a Suckzuke quadzilla LT500. the chassis don't handle that great on one but it will handle better than a converted motorcycle.

[no_doz]

cuz they're dog **** and no one wants to put cylinders/heads on every other time you run the hell out of it.

i came to the conclusion that a big bore on a banshee motor would make more sense then dicking around with a cr500 motor for a quad.

not to say that a 500cc 2 stroke quad wouldnt be awesome, but hassle wise its not worth it when there are cheaper/better options. mostly just B-A factor with the 500