BannedCR500Riders.com

Im looing to extend my stock swingarm.... it will mostly be a flat drag/dune bike...
I will be useing 2 swingers to create one..

Im looking for picture off some cr500's with extended swingarms and please list how far out back it is... im trying to get ideas of how long to do mine.

look on craigs list SF bay area lefty list his on there all the time i think there $380.00 bolt on with 3 slotted adjustment holes no rear brakes but i think for $50 more he will machine it for brakes!! hes out of lodi,Ca

i can build my own for a fraction of that cost

r1yfz wrote:i can build my own for a fraction of that cost

He includes an axle, snails, and chain slider. I have the one with the brake quality stuff, I just wish that lefty would use Metric Hardware and not SAE I'll get you a pic later if Paul doesnt beat me to it

theres several designs of extensions depending who made them but the ones ive seen were pretty simple in design. the problem with using 2 swingarms to make one is they will be in a fixed position and youll have almost no adjustablility, if you know the exact amount of extension you need then it would be fine but youll be shit out of luck if you want to shorten or lengthen it for different terrain. a chunk of billet 6061 and drill press is really all you need to make some adjustable ones. if you have acess to more sophisticated equiptment it would probly be easier but not necesarry.

this was a local dudes yamaha chassis. these are more sophisticated than some ive seen but you get the idea. on the steely swingarm you can pull out the end pieces and slide the extension inside, however on the newer honda swingarms you cant slide the extensions inside.

it will be on a stellie.... i wil be dynoing the bike to see what it makes before i decide how long... but im guessing it will be in the 6-8 over range on a 14 viper

Mine is adjustable from 5.5-9.25" and I run it around 6.5", anymore than that and the loss of traction is a PITA.

any pictures?

100hp honda wrote:this was a local dudes yamaha chassis. these are more sophisticated than some ive seen but you get the idea. on the steely swingarm you can pull out the end pieces and slide the extension inside, however on the newer honda swingarms you cant slide the extensions inside.

That bike has soooo much travel in the front...... looks like he needs heavier fork springs

r1yfz wrote:any pictures?

Ill look..

You dont need to machine or weld anything to run a rear brake, the caliper rests on top of the swingarm and once the axle nut is tightened it aint going anywhere, all you need is a longer hose.

caseyracing222 wrote:That bike has soooo much travel in the front...... looks like he needs heavier fork springs

your right and ill pass the info along. perhaps he could use some of your magic fork bleeders/fuel filters

r1yfz wrote:any pictures?

brits setup would work tits for you. not sure where he got em though

thanks brit!!

How did that tire hold up? i will be running the same one. Did you have any wheelie problems while launching hard in the first 300ft with that setup?

100hp... i think i remember brit posting somewhere that he got those off a hillclimbing forum? could be wrong though.

Got them from a guy on www.kingofthehill.org


It works perfect in the sand full throttle + juice second gear launches are possible with the front just barely coming up.

do you have anyidea how many links are in your chain? or where you got your brake line?

The chain is a 120 link plus I added 10 or so more links from an old one, I got the brake line from glen at GSS he stocks them

front lines work but a little long

100hp honda wrote:

caseyracing222 wrote:That bike has soooo much travel in the front...... looks like he needs heavier fork springs

your right and ill pass the info along. perhaps he could use some of your magic fork bleeders/fuel filters

or maybe he can follow your expert porting advice lets not go looking for a fight.... Back on topic. I can get you a pic of the LEFTY extenders... would you like a pic of them off or on the bike?

on the bike perferably

caseyracing222 wrote: lets not go looking for a fight

have a nice day

Here are all the types I know of.....

Starting of with my bike.... I use Leftys extensions with the brake set up


another set of Lefty's NOT my bike

Dave J extensions and bikes


Jeff Thomas built extensions and machines


and French built stuff....

Ive looked at that bike close up at RPs pad, the supercharger setup is pretty fukin cool

123