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ST
03-14-2003, 12:26 PM
Anyone know if they make 125cc conversion kits for the RS50s? TIA

edit-> maybe i should also ask...is it viable to make the RS50 a trackbike since it's low cost and streetable. Or just go for a used Rs250 instead?
Max Smiley
03-14-2003, 02:07 PM
250 sounds the ticket. I don't think you can take a 50 even modded out on a track day, the speed differential to the big bikes is just too great ie. top of 70 mph vs. 140+ just too unsafe. some have strict displacement guidelines. however, there are some groups / races just for the small bores. up at sacto I think. a 50 chassis is woefully inadequate for near tripling the engine capacity.
Strokin' It
03-14-2003, 02:52 PM
I have an RS50, and there is definitely lots of room in there if you wanted to drop in a bigger motor... The frame is plenty strong, but the swingarm is a little dinky. Someone on the Apriliaforum dropped in a bigger 4-stroke in theirs, so maybe as there... I'm actually thinking about selling mine (it's fully kitted) to get a trackbike... I also have a few aircooled yz125 motors laying around.... :teeth

-joe
Max Smiley
03-14-2003, 03:04 PM
start braking early :toothless
eddiemcrider
03-17-2003, 01:02 PM
a 50 chassis is woefully inadequate for near tripling the engine capacity.

Somebody tell these guys!

YSR - Extreme Bikes (http://www.ticeman.com/old_site/ysrs/)

Check out the YZ426F conversion.
Max Smiley
03-17-2003, 01:10 PM
meant the little priller but applies to all. even those guys know eg. click on the first bike and this is what it starts with, "This is a HIGHLY modified and braced YSR chassis..." the next bike description says, "The frame is substantially beefier than it was with the YSR/YZ125 when I first built it, although it still has a tendency to break engine mount bolts from vibration..." third bike, "The next thing was a brake. It was very obvious that the engine was way above what the brakes could handle and I HAD to do something. " etc. I rest my case!



very cool link though! those guys are insane :loco
Bad Dad
03-17-2003, 01:36 PM
shouldn't this be in the mini-bikes forum:confused
eddiemcrider
03-17-2003, 01:40 PM
I agree, but didn't this thread start before the forum was created. If I were a Mod then I'd move it for ya.
Max Smiley
03-17-2003, 02:32 PM
RS50 isn't a mini bike really or is it? :confused

ok, moved. kinda' tech kinda mini. it's all good :)
morthrane
03-17-2003, 03:17 PM
An RS50 is a friggin pocket bike

... to me :twofinger