Author Topic: Rm 500  (Read 26931 times)

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Offline LWC82PE

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Re: Rm 500
« Reply #15 on: November 20, 2009, 01:05:50 pm »
For a bit more about water cooled 500's and works 500's see here

http://ozvmx.com/community/index.php?topic=704.0
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline Hoony

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Re: Rm 500
« Reply #16 on: November 20, 2009, 01:58:14 pm »
i say build it, don't tell magoo but i love the RM500 and would love to see it in a watercooled configuration.
Long time Honda Fan, but all bike nut in general, Big Bore 2 stroke fan.    http://www.youtube.com/watch?v=XJoKP6MawYI
1985 Honda CR500RF "Big Red"
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Offline Marc.com

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Re: Rm 500
« Reply #17 on: November 20, 2009, 03:22:46 pm »
Start with a 250 roller that way you have the RN500 looking frame and who knows radiators etc.
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TT

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Re: Rm 500
« Reply #18 on: November 20, 2009, 08:50:48 pm »
Marty Moates rode an RM250 with a 500 engine in it in 1983.
Only an air cooled though.
I've got some good photos I took of it............................ somewhere..........................  :-\

Offline Marc.com

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Re: Rm 500
« Reply #19 on: November 20, 2009, 11:59:11 pm »
belongs to another forum member, awesome, but imagine it with water cooling.



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Offline jady

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Re: Rm 500
« Reply #20 on: November 25, 2009, 01:40:33 pm »
Hi Tony

Marty Moates rode an RM250 with a 500 engine in it in 1983.
Only an air cooled though.
I've got some good photos I took of it............................ somewhere..........................  :-\

if you could dig up those photos of Marty's bike it would be great to see them...
cheers Jady
CR125RC, XR400. Sadly sold the RM500 :-( Once was Viper #467

Offline jady

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Re: Rm 500
« Reply #21 on: November 25, 2009, 10:18:05 pm »
Marty Moates rode an RM250 with a 500 engine in it in 1983.
Only an air cooled though.
I've got some good photos I took of it............................ somewhere..........................  :-\

 Here are a couple of pics of my RM500 in a 250 frame (complete with dodgy tank stickers). Wish I knew the history of this bike. It was in pieces in my shed since I found it in the trading post in 2002; finally got it going this year for Viper. Someone on the old ozvmx forum said there were a few put together back in 1984. Don't know much more than that.
 

 

 
CR125RC, XR400. Sadly sold the RM500 :-( Once was Viper #467

Offline Rossvickicampbell

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Re: Rm 500
« Reply #22 on: November 26, 2009, 10:58:21 am »
excuse the ignorance but why the transplant - weren't the 250 and 500 frames very similar anyway for this/these years?  What would be consider an advantage of doing this?

cheers

Rossco
1974 Yamaha YZ360B
1980 Honda CR250R - Moto X Fox Replica

Offline BAHNZY

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Re: Rm 500
« Reply #23 on: November 26, 2009, 01:14:28 pm »
Firko,
Do your homework on the LT500 engine (i did). I had a 84 RM roller and a Water Cooled engine ready to go. I followed the Quad forums in the states on these engines & elected to not do it based on the $'s to get a LT500 bottom set up correctly. Essentially it releates to the LT's very thirsty appetive for main bearings and subsequent rod failures. I roughed it out that to get it done right would be around 2.5-3K to build a good engine, not including buying it in the 1st place.
Rod (BAHNZY) Bahn

Offline Marc.com

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Re: Rm 500
« Reply #24 on: November 26, 2009, 04:24:32 pm »
I had a 84 RM roller and a Water Cooled engine ready to go.

So what happened to the bits in the end.  ;)
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All Things 414

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Re: Rm 500
« Reply #25 on: November 26, 2009, 05:31:47 pm »
excuse the ignorance but why the transplant - weren't the 250 and 500 frames very similar anyway for this/these years?  What would be consider an advantage of doing this?

cheers

Rossco

I'm wondering the same myself!? An air cooled 500 into an aircooled 250 frame? Why.  ??? Maybe a bit of weight saving but I'd imagine they put that extra weight into the 500 frame for a reason....... :-\

firko

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Re: Rm 500
« Reply #26 on: November 26, 2009, 06:54:50 pm »
Quote
Essentially it releates to the LT's very thirsty appetive for main bearings and subsequent rod failures. I roughed it out that to get it done right would be around 2.5-3K to build a good engine, not including buying it in the 1st place.
Ah Ha....That's obviously the reason my US friend has so many expired LT engines under the house. ;D  That's also explain his lack of encouragement when I described the proposed project to him. I'd asked him why he hadn't done it himself and he simply told me that he didn't have enough money to throw into a bike that didn't come within a cooee of a CR500 or KX500. He actually raced desert on KX500s so it all falls into place now.

After having a little burl on the 490 Maico and being very impressed with Dean Burts RM400 and Husky Petes CR500 Husky Silver Bullet, my appetites been whetted to build and Evo or pre 85 bike. I'd like to keep the bike outside of the cookie cutter, every bike looks the same scheme of things, hence the watercooled RM500 idea. If Bahnsy and my mate Mike are cold on the idea I'll have another look at what's out there. I've got a soft spot for 465 Yamahas and wouldn't mind another ATK 605 or even a 406 so who knows what might come out of the shed next year. There are a few other projects to knock over first though.

Just in case I keep the Suzuki plan on the table, is the LT engine available Rod?
« Last Edit: November 26, 2009, 06:56:55 pm by firko »

Offline Marc.com

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Re: Rm 500
« Reply #27 on: November 26, 2009, 07:11:55 pm »
speaking of quads friend of mine was having problems with his Banshee so repowered it  ;D

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Offline Lozza

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Re: Rm 500
« Reply #28 on: November 26, 2009, 07:17:32 pm »
Rod/ bearing failures can usually be traced to 1 or 2 causes, lack of lubrication and over revving.
Jesus only loves two strokes

Offline LWC82PE

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Re: Rm 500
« Reply #29 on: November 26, 2009, 07:27:08 pm »
exactly,Lozza, im sure its nothing a good knowledgeable mechanic or 2 stroke tuner can fix/prevent along with some quality parts so i wouldnt pay too much attention to those quad forums. And let me guess they were running 40 to 1 or something like that ::) thats probably half the reason for the big end failures.
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022