OzVMX Forum

Clubroom => General Discussion => Topic started by: HL400 on December 05, 2008, 08:20:33 pm

Title: XC 500 Yamaha
Post by: HL400 on December 05, 2008, 08:20:33 pm

Hi all does any one no any thing about the XC 500 Yamaha on Ebay.?   I have put in a few bids but have been trumped every time. What would be a reasonabe price for one ?

Title: Re: XC 500 Yamaha
Post by: LWC82PE on December 05, 2008, 08:37:43 pm

dont you mean SC500?

Title: Re: XC 500 Yamaha
Post by: E74 on December 05, 2008, 08:45:45 pm

I think he means XT500  ???

Title: Re: XC 500 Yamaha
Post by: HL400 on December 05, 2008, 08:56:46 pm

Sorry I meant an CS 500 Yamaha

Title: Re: SC 500 Yamaha
Post by: HL400 on December 05, 2008, 09:02:04 pm

Dam CS SC XS to many models.  Its and SC500 Yamaha Motorcroos a 1974 mod.  H

Title: Re: XC 500 Yamaha
Post by: cyclegod on December 05, 2008, 09:05:42 pm

http://cgi.ebay.com.au/YAMAHA-SC500_W0QQitemZ190271334353QQihZ009QQcategoryZ102690QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Title: Re: XC 500 Yamaha
Post by: cyclegod on December 05, 2008, 09:09:24 pm

It has the 73 model sidecovers and mudguards and would make a nice bike once restored but they can be a bit evil in the hndling department as a racer. needs this to make it look right

http://cgi.ebay.com.au/YAMAHA-SC500_W0QQitemZ190271334353QQihZ009QQcategoryZ102690QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Title: Re: XC 500 Yamaha
Post by: Hoony on December 05, 2008, 09:16:20 pm

do you really want an SC500 Henry, or have you been on the piss tonight?

Cyclegod is on the Money, them things are Evil, if you pull the head off one inscribed in the piston crown is "666"

Title: Re: XC 500 Yamaha
Post by: HL400 on December 05, 2008, 09:18:45 pm

You might be right Hoony, it might be a pig to ride.  I will keep on looking   Henry

Title: Re: XC 500 Yamaha
Post by: mx250 on December 05, 2008, 11:50:13 pm

Quote from: cyclegod on December 05, 2008, 09:05:42 pm

http://cgi.ebay.com.au/YAMAHA-SC500_W0QQitemZ190271334353QQihZ009QQcategoryZ102690QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

How do you do that God. Someone mentions some obsecure item and within 5 minutes you've found it on EvilPay. You're not employed by EvilPay by chance :).

I believe that left stock they are pretty evil but a few easy mods tame them down. There's something tricky about the ignition which made it go from 10hp to 40hp at the flick of a switch :o. Put that with a porky overweighted poorly suspended beasty and you get the horror stories :P.

Title: Re: XC 500 Yamaha
Post by: firko on December 06, 2008, 01:56:30 pm

I've owned a couple of SC500s over the years including the Champion framed version now raced by Edgar Phipps. The main problem with them is piston failure in the gudgeon pin area and an ignition curve that's all over the shop, similar to that of a TM400. I fitted DT400 outside flywheel ignition which transformed the bike and eventually sorted the piston failure/distortion problem with some minor welding buildup in that area. Edgar has been rooting around with them for years and has done a couple of interesting conversions. On one he fitted a five speed trans from an MX250 which involved removing the counter balancer which is on the transmission shaft where fifth geear would normally be. There is no noticable added vibration. On the other, in a bid to overcome the piston problems, he had a new sleeve made and has fitted a CR500 Honda piston. This engine is in my old Champion flat tracker and it is as fast as shit, and possesses none of the SC500 shortcomings. He uses both outside flywheel points ignitions and DT400 CDI  setups.
Despite the horror stories, these old things are still pretty quick. If you've got the gonads to hold on to the bucking bronco handling, you can have a lot of fun on them.