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Author: Subject: Bike shocks
turbo77

posted on 6/11/13 at 11:24 AM Reply With Quote
Bike shocks

Did some one tryed to use the motorcycle shock absorbers with other springs
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loony

posted on 6/11/13 at 12:08 PM Reply With Quote
There are some Haynes Roadsters in Poland with bike shocks (mainly Yamaha R6/R1 and similar) and driver are pleased.

Personally I will use bike shocks as they are cheaper and easier to get... something like FZ6 or FZ1 is even cheaper than R1/R6 and should be little softer...





Lucas

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turbo77

posted on 6/11/13 at 12:19 PM Reply With Quote
Do you knew if they canged the springs or did they make it with triangular mount like it is on bike
Reguards Bostjan

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MikeRJ

posted on 6/11/13 at 12:23 PM Reply With Quote
Bike shocks designed for monoshock rear linkages typically have quite limited travel and extremely high rate springs (and therefore very high damping).

As an example this spreadsheet shows a list of rear shocks on some pretty common bikes. The stroke varies between about 53mm and 74mm and between 400 and 700 inches/lb spring rates.

Not really suitable for a conventional double wishbone or live axle Locost suspension, but could be used with a rising rate push/pull rod system.

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loony

posted on 6/11/13 at 12:27 PM Reply With Quote
Mounted like every other shock:







Lucas

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turbo77

posted on 6/11/13 at 12:28 PM Reply With Quote
I have in mind dirtbike shocks
adjustebles baound and rebound

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turbo77

posted on 6/11/13 at 12:33 PM Reply With Quote
Loony
great photo and info. this is for my project great information (low budget)

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rick1962uk

posted on 6/11/13 at 01:10 PM Reply With Quote
watch out as they have fitted the shocks upside down and some wont have any damping that way up
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turbo77

posted on 6/11/13 at 01:13 PM Reply With Quote
Any info on whitch one
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prawnabie

posted on 6/11/13 at 01:48 PM Reply With Quote
There was a company around that put a spring platform on a mini damper - zeemerride I think. Mind you I also read that they fell apart after a while, but its something to look at.
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iank

posted on 6/11/13 at 03:42 PM Reply With Quote
quote:
Originally posted by prawnabie
There was a company around that put a spring platform on a mini damper - zeemerride I think. Mind you I also read that they fell apart after a while, but its something to look at.


They were Robin Hood parts and were mini shocks with spring seats welded on, the welding heat apparently causing them to blow their seals in short order.

Came across this thread a while back which gives instructions on how to do a better job
http://www.lotus7.co.nz/forum/viewtopic.php?f=31&t=2279





--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous

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MikeRJ

posted on 7/11/13 at 12:37 PM Reply With Quote
quote:
Originally posted by loony
Mounted like every other shock:


Just because it can be mounted in the same location, doesn't mean it's actually suitable for the job.

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coyoteboy

posted on 7/11/13 at 01:48 PM Reply With Quote
The simple answer here is if you can find a shock that is subject to similar loads, travels and stroke speeds, and is reasonably adjustable - then yes it'll probably do the trick. Don't forget to mount it in the same orientation. If you have to double the spring rate to fit it you're probably outside the best performance and are better looking elsewhere.






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steve m

posted on 7/11/13 at 01:58 PM Reply With Quote
In 1999 when getting my car on the road, I had brand new Honda Goldwing shoxs on the back of my locost, and they lasted less than 100 miles, and leaked all the fluid, as had cracked the bottom of both shoxs

so in my view, there not up to the job, and a real waste of money on my part

Steve





Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at




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SPYDER

posted on 7/11/13 at 02:20 PM Reply With Quote
We used R1 shocks on both ends of our Phoenix build. We chucked away the preload adjusting bits and machined new collars. The range of damping adjustability is huge. 250lb springs all round. The main problem is the limited travel but its not such a problem on a track only car.



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