comanche
Newbie
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« on: March 08, 2009, 09:37:19 PM » |
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got the remnants of a reliant coming during the week but my bro-in-laws given me a gpz 305 are these forks any good or do i try to swop it for some decent ones  |
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love hurts especially when your old enough to know you shouldnt fall
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tbone
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« Reply #1 on: March 08, 2009, 09:53:25 PM » |
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31mm diameter stanchions, fitted with twin discs. Is it the full front end or just the forks that your getting?
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NO I WON`T. aye ok then, i will
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Manky Monkey
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« Reply #2 on: March 08, 2009, 10:55:18 PM » |
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I always tend to go for something from a bike 750cc or over, simply because the forks will be designed to withstand the weight & performance of a physically big machine, so should be fine for a trike. My own trike uses Suzuki Savage forks. Although the tubes are large diameter, the Savage is a fairly soft riding, lightweight cruiser, so I've uprated the forks with progressive springs intended for a Harley.
Any decent sized, well sprung forks should do the job.
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On the last freedom moped out of Nowhere City.
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comanche
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« Reply #3 on: March 09, 2009, 10:58:53 AM » |
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complete bike tbone the forks and headstock are in good nick
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love hurts especially when your old enough to know you shouldnt fall
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tbone
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« Reply #4 on: March 09, 2009, 06:59:30 PM » |
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the gpz305 will weigh in the region of 165kg, a reliant robin about 450kg, and your trike? somewere in between. Although the forks aren`t the fatest on the market, there not the thinnest either, and i cant tell you about the internals.
My advice would be use them, certainly to start with, no reason they cant be swapped or uprated later.
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NO I WON`T. aye ok then, i will
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Manky Monkey
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« Reply #5 on: March 09, 2009, 07:33:11 PM » |
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Nice set of girders, that's what you want!  |
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On the last freedom moped out of Nowhere City.
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panthershaun
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« Reply #6 on: March 09, 2009, 08:50:14 PM » |
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you ain't it, till you've "Bobbed" a Brit!!!
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Manky Monkey
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« Reply #7 on: March 09, 2009, 10:34:06 PM » |
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I doubt many forks would actually collapse under the weight, but trike front ends experience much higher stresses than bikes so why tempt fate. As you say Shaun, with the Mantis trikes, the majority of the stationary weight is on the back. Not sure what happens under braking or heavy cornering though.
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On the last freedom moped out of Nowhere City.
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comanche
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« Reply #8 on: March 09, 2009, 10:58:24 PM » |
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thanks everyone, im gonna start out with the kwacker then maybe replace. if this trike works then the next one might have girders
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love hurts especially when your old enough to know you shouldnt fall
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TwistedPatience
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Teetering on the edge of insanity
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« Reply #9 on: March 10, 2009, 05:48:46 PM » |
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I doubt many forks would actually collapse under the weight, but trike front ends experience much higher stresses than bikes so why tempt fate. As you say Shaun, with the Mantis trikes, the majority of the stationary weight is on the back. Not sure what happens under braking or heavy cornering though.
There have been a few Vw trikes that the forks that have sheared off, one a good few years back killed it's rider but I have heard that he was using 125 dirt bike forks. |
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"It's time to raise the Finger,
That middle digit takes your point and drives it home"
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ByzMax
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Choppit
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« Reply #10 on: March 11, 2009, 01:14:33 AM » |
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Too small! Take Mankeys advice. Ya need a minimum of 36mm. Whatever the weight on the front wheel when standing. (Bout 160 180kg) times that by ten (Sort of impact you would get hitting a deep pot hole (1680kg to 1800( almost 2 tons)  . add three more to be sure 2100kg (over 2 tons) You also have to bear in mind that there are huge lateral loads when cornering on a Trike that are not on a bike. Add to that an allowance for stress fatigue you should go for much bigger than 31mm. |
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comanche
Newbie
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« Reply #11 on: March 11, 2009, 12:40:12 PM » |
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sounds good to me im attach to my body as it is ill use the kwacker forks for setting up while i find some bigger ones
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love hurts especially when your old enough to know you shouldnt fall
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manfred
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So many projects - so little time.....
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« Reply #12 on: March 24, 2009, 07:12:30 PM » |
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If you're sticking with 'normal' forks, go for something like FJ (41mm) a few sets have been appearing cheap on ebay at the mo'.
Or, if you're feeling flush, a complete vmax front-end (40mm or 43mm). Best looking standard front-end in my humble opinion.
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Over the hill and picking up speed on the long down-hill unto DEATH.
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