Author Topic: Bouncy Forks  (Read 2522 times)

Offline adespin

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Re: Bouncy Forks
« Reply #15 on: August 31, 2018, 07:25:59 PM »
Are your wheels correctly trued and balanced ?. My front wheel was not fully trued, it had a flat spot , I  have improved it but it needs another go, as does the rear wheel. Making a slight improvement on the front made a slight diffence to the bounce I was experiencing although I still need to properly true them both. I have also picked up some 5w oil which I will add to improve the damping. Like you it puts me off riding the Honda a little, but with some patience I suspect it will get sorted.

That's something i'll have to check.
1971 cb750 K1

Offline Paulreade

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Re: Bouncy Forks
« Reply #16 on: September 04, 2018, 08:13:27 AM »
By way of an update, I have just added a 5w oil to my forks and the bounce has in fact reduced quite considerably.
I'm not saying I have in fact cured it yet as I would like a second opinion on the 're Truing ' of the wheels by someone.
Another issue I guess mentioned by a previous party was that we should not I guess expect too much from these bikes, they are heavy, old tech and should not be compared to a modern machine. I find I am doing this constantly with the ride and the engine noises and quite frankly it drives you a little mad.
Current bikes:
Suzuki GSX 1250 FA
Triumph t100 bonneville
Honda cb750 k6

Offline Paulreade

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Re: Bouncy Forks
« Reply #17 on: September 04, 2018, 10:05:35 PM »
I managed a decent 40mile run today by way of a test after changing the oil to 5w. Has definatly made an improvement to the extent I have to forgive the 'performance of the front suspension ' by virtue of its design and age. Very pleased with the improvement. I guess it depends also on the weight of the rider and the style of riding ?. Being only circa 11.5 stone the 5 w seems to work for me.
Current bikes:
Suzuki GSX 1250 FA
Triumph t100 bonneville
Honda cb750 k6

Offline Erny

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Re: Bouncy Forks
« Reply #18 on: September 04, 2018, 10:26:24 PM »
Have the same issue with my CB750K7...
Not sure for values of your weight you provided (stone - is that kind of slang, equal to feet of what? Sorry that I don't understand...)
My weight is 80kg (naked :D)
CB750K7 US model (1977)
CB550K1 US model (1975)

Offline Moorey

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Re: Bouncy Forks
« Reply #19 on: September 04, 2018, 11:07:20 PM »
By way of an update, I have just added a 5w oil to my forks and the bounce has in fact reduced quite considerably.
I'm not saying I have in fact cured it yet as I would like a second opinion on the 're Truing ' of the wheels by someone.
Another issue I guess mentioned by a previous party was that we should not I guess expect too much from these bikes, they are heavy, old tech and should not be compared to a modern machine. I find I am doing this constantly with the ride and the engine noises and quite frankly it drives you a little mad.

You want to try going for a ride on something old then. ;)

Offline Green1

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Re: Bouncy Forks
« Reply #20 on: September 04, 2018, 11:07:44 PM »
I'm about 9.5 stone and 17 hands and use 10w oil  ;)
Current bikes
Honda CB750k1 Valley Green Metallic
Honda CB750k1 Candy Gold
Honda CB550k Candy Jade Green
Honda CG125
Aprilia Pegaso 650
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Offline adespin

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Re: Bouncy Forks
« Reply #21 on: September 05, 2018, 09:41:35 AM »
Have the same issue with my CB750K7...
Not sure for values of your weight you provided (stone - is that kind of slang, equal to feet of what? Sorry that I don't understand...)
My weight is 80kg (naked :D)
Where are you located Erny ? not in the UK i would guess. 1Kg = 2.2lbs(pounds), 14lbs = 1stone, (old british weight measurement). Personally i can't get to grips with a persons weight in kg, too long in the tooth  :'( 80kg means nothing to me, i have to convert it to stones to know if you are a lightweight or a fat b*stard like me (16stone)
1971 cb750 K1

Offline Moorey

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Re: Bouncy Forks
« Reply #22 on: September 05, 2018, 02:04:53 PM »
5ft tall x 80kg = fat bastard .  6ft tall x 80kg = bastard. 6ft 6 inches x 80kg = skinny bastard. I hope this helps a little.  ;D

Offline adespin

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Re: Bouncy Forks
« Reply #23 on: September 05, 2018, 02:11:11 PM »
Eloquently put in plain english ;D
1971 cb750 K1

Offline Erny

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Re: Bouncy Forks
« Reply #24 on: September 05, 2018, 02:18:43 PM »
Have the same issue with my CB750K7...
Not sure for values of your weight you provided (stone - is that kind of slang, equal to feet of what? Sorry that I don't understand...)
My weight is 80kg (naked :D)
Where are you located Erny ? not in the UK i would guess. 1Kg = 2.2lbs(pounds), 14lbs = 1stone, (old british weight measurement). Personally i can't get to grips with a persons weight in kg, too long in the tooth  :'( 80kg means nothing to me, i have to convert it to stones to know if you are a lightweight or a fat b*stard like me (16stone)
I live in Slovakia, we use metric system only. I knew about pounds, pint, gallon, ounce, inch, foot, yard, mile.. But never heard about stone. For me stone = rock

But now I learned something new - thanks for that!
Looking at wiki right now
CB750K7 US model (1977)
CB550K1 US model (1975)

Offline Paulreade

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Re: Bouncy Forks
« Reply #25 on: September 05, 2018, 05:48:13 PM »
And there was me thinking the SK was a stockport postcode !
Current bikes:
Suzuki GSX 1250 FA
Triumph t100 bonneville
Honda cb750 k6

Offline Moorey

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Re: Bouncy Forks
« Reply #26 on: September 05, 2018, 08:56:31 PM »
Have the same issue with my CB750K7...
Not sure for values of your weight you provided (stone - is that kind of slang, equal to feet of what? Sorry that I don't understand...)
My weight is 80kg (naked :D)
Where are you located Erny ? not in the UK i would guess. 1Kg = 2.2lbs(pounds), 14lbs = 1stone, (old british weight measurement). Personally i can't get to grips with a persons weight in kg, too long in the tooth  :'( 80kg means nothing to me, i have to convert it to stones to know if you are a lightweight or a fat b*stard like me (16stone)
I live in Slovakia, we use metric system only. I knew about pounds, pint, gallon, ounce, inch, foot, yard, mile.. But never heard about stone. For me stone = rock

But now I learned something new - thanks for that!
Looking at wiki right now

Just to add to the fun do not forget. The US gallon is used in the United States and is equal to exactly 231 cubic inches or 3.785411784 litres The Imperial gallon or UK gallon is used in the United Kingdom and is equal to approximately 277.42 cubic inches. Its exact value is defined as 4.54609 litres One imperial gallon is approximately 1.2 US gallons.

Offline Erny

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Re: Bouncy Forks
« Reply #27 on: January 27, 2019, 12:30:18 AM »
Wau again something new until now for me gallon was just gallon, did not know there 2 gallons existing
CB750K7 US model (1977)
CB550K1 US model (1975)

Offline Bryanj

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Re: Bouncy Forks
« Reply #28 on: January 27, 2019, 08:15:45 AM »
The US gallon is actualy more logical as they say 16 ounces to a pound so 16 fluid ounces to a pint whereas UK say 20 fluid ounces to a pint but still 8 pints to a gallon so bigger gallons.

Offline Andych

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Re: Bouncy Forks
« Reply #29 on: January 28, 2019, 02:08:54 AM »
Oh dont get me started on different variations.. I sell pumps (irrigation pumps...big ones) and the mixture of standards I get as enquiries... a bore will give X Gallons per hour while they want X litres per day at X feet of head and they have X metres of pipework... Problem is most Cocky's (Farmers here in Aus) are older guys and still live in the pre-metric age.. or they mix and match.

I must admit though.. I cant visualise 173cm but I can 5Ft 8in... but then I can also visualise 85 or 90kg but have no idea what that would be in stone.. so I guess I am just as bad.. :)
1975 CB400 - Project
1978 Yamaha SRX250 - Project

 

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