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Post by joeyjoejoe on Jun 23, 2008 11:20:53 GMT
recently i have ridden a few friends bikes and found that their ride height is a lot more comfortable for me, maximum a couple of inches lower than my divvy, which means i can comfortably get my feet on the floor. Im just looking into the feasibility of changing the height of my bike, is it simple a case of changing the rear shock spring, and is this expensive?
thanks
joe
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Post by teejayexc on Jun 23, 2008 11:32:18 GMT
600 or 900? If it's the 900 then you can cheaply lower the height by altering the length of the dogbones (can't remember which way to lower  ), but somebody will be along to say I'm sure. trev |
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Post by beeblemaster on Jun 23, 2008 11:48:45 GMT
Obviously, having been posted in the 600 section it's not a 900  Doofer will be able to advise on this one properly. But I think it's a case of carving the seat foam and she's also swapped her 18" rear wheel for a 17".  |
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Post by teejayexc on Jun 23, 2008 13:19:04 GMT
OOPS! *Bugger* it's all that thread/post changing Pop's was doing confusing me  trev |
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Post by Pops on Jun 23, 2008 14:47:19 GMT
It doesn't take a lot! ;D does it trev
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Post by darren on Jun 24, 2008 13:05:04 GMT
Obviously, having been posted in the 600 section it's not a 900 Doofer will be able to advise on this one properly. But I think it's a case of carving the seat foam and she's also swapped her 18" rear wheel for a 17". does anyone know what the 17 was off, cant find much aboot it |
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Post by CD on Jun 24, 2008 14:03:02 GMT
Trouble is you lose ground clearance which comes in very handy when you overcook a corner. I can only get my toes down on the 900 but I soon got used to it. Keep the steering bearings in good condition and you can very nearly stop before putting a foot down. But its a shame we cant have suspension that rises & drops on demand.
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Post by neilmud Lord Protector on Jun 24, 2008 16:56:20 GMT
. But its a shame we cant have suspension that rises & drops on demand. Maybe dieting or eating more will achieve the right ride hight.  Neil |
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Post by biblebasher on Jun 26, 2008 19:16:43 GMT
while we're on the subject, any ideas for raisng the back end? anyone fitted a longer non standard rear shock?
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Post by biblebasher on Jun 26, 2008 19:23:46 GMT
only me again. just trawling thru the old tips and i spy a tail jack reference about fitting an R6 shock. thanx for that!
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Post by amorti on Jun 30, 2008 20:25:55 GMT
The rear wheel came from an XJR400, a little bird told me I wouldn't use the R6 shock, it'll drop to at best std height once you sit on it, it's hugely undersprung. You need a shcok off a bike with no linkage. That's the way to raise the rear though, or weld up an extended bracket for the shock, but that's got potential to be messy. |
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Post by General Gman on Jun 30, 2008 21:33:41 GMT
Just saying the R6 shock will be undersprung is oversimplifying matters.Yes, a linkless system would need a heavier spring (asuming the mounting point were the same), but you're not factoring in swing arm length, wheel travel and all the really interesting equations related to all this.And the fact that an R6 is much, much firmer as standard than a divvy.I know a lot of hooligans who have fitted R6 shocks to big old gixxer 1100s - probably weigh at least 80 kg more than an R6 but they work a treat. Anyone got a copy of solidworks I could play with and the relevant spring rates for the two bikes ? |
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Post by amorti on Jun 30, 2008 22:46:19 GMT
no you're dead right. I'm applying experience from putting a CBR900 (relatively stiff, big, heavy sport bike) spring on a CB-1 (relatively soft, tiny, light streetbike). It's not the same, but it's comparable. Of course it's possible the leverage ratios and whatever else were completely different from the two yams in question.
Hmm, be interesting to play with the software, not that I'd know how to use it.
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Post by General Gman on Jun 30, 2008 23:13:13 GMT
funnily enough, the 2002 fireblade shock's spring rate is almost twice that of the equivalent model gixxer, with only a 20mm difference in wheel travel.
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Post by amorti on Jul 1, 2008 16:49:57 GMT
98 Blade, 89 CB-1.
Sounds like you've looked into this sort of stuff before?
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Post by General Gman on Jul 1, 2008 23:03:48 GMT
98 Blade, 89 CB-1. Sounds like you've looked into this sort of stuff before? Yep, started in the eighties when monoshocks were first used widely.Used to read all of John Robinson's technical articles in PB. The man was an absolute genius - he helped me tune all my two stroke motors (not completely successful, but that's because I thought I knew better...) I built what would later be known as a supermoto from a KDX175 with AR125 wheels etc. Later in life I discovered FEA software at work, and spent months designing an exhaust system for a trumpet 955i...just shows that if you go into something blind, you're gonna fail cos when we fitted the pipework the bike lost about 3bhp at the top end. |
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), but somebody will be along to say I'm sure.
