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Author Topic: heavy clutch  (Read 254 times)

marcbeez

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heavy clutch
« on: January 08, 2017, 08:08:26 am »
hello, i've just bought a NF civile '74, 19000km not restored just well maintained.
the gearbox is somewhat difficult but the main problem is the very heavy clutch. I have 8bikes morini 250/350 bmw r27/r100s mz150 '71bonneville but none of the clutches are that heavy. My forearm is very sore at the moment . I installed a new cable , same same, please help, or do I need to go to the gym!
greetings from Antwerp
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nick949

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Re: heavy clutch
« Reply #1 on: January 09, 2017, 07:14:53 am »
The clutch should be light to use. Either the cable is incorrectly routed and is binding, or you need to do some investigation inside the case.

Nick
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randall

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Re: heavy clutch
« Reply #2 on: January 09, 2017, 09:25:08 am »
I agree with Nick,
however,

Yes, you have to do ... muscle. At first it seems hard

(And probably is), then you get used. ;D
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Kater

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Re: heavy clutch
« Reply #3 on: January 09, 2017, 12:35:01 pm »
I agree with Nick and Randell, you will get used on it. But there are differences between the bikes. I have three NF and the resistance  was not the same on each bike. I found out that the lever were bent differently so I bent them more straight that the ball at the end of the lever reaches the handlebar when it is pulled. Now I can reach the lever more outside, the lever arm is bigger and I need less force.
Sometimes washers were added to the clutch springs to get more friction when it slipped, this could be too.

good luck

Kater
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marcbeez

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Re: heavy clutch
« Reply #4 on: January 09, 2017, 04:27:38 pm »
thanks for the swift reply, what is the correct routing for the clutch cable and how long is it supposed to be. On pictures some cables entre between the 2 clocks on the dashboard and some go directly down next to left downtube of the frame.
On the net I found that halving the weight of the flywheel can do wonders shifting?
I have been riding bikes for 41years now and my falcone has the most difficult gearbox I ever encountered. This includes some belgian sidevalve 500cc jobs from the early 50's.
The steering and comfort are wonderful , and with the frequent speedtraps in belgium( flemish part) its speed is more than enough.
greetings
marc
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randall

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Re: heavy clutch
« Reply #5 on: January 13, 2017, 06:10:38 pm »
Given, that you have to get the hand  (... or rather the foot)  ;D

and that the gear shifting is perhaps the most difficult part to learn on the NF, ::)

 if the transmission is in order and the clutch as well, the gears must engage well and quickly, both in accelleration and decreasing.   8)

 In any case, the gearbox is "precise" and just a decline of attention, distraction or fatigue on the part of the pilot is cause of malfunction. ???

To shifting well, the gears should NOT be "pulled"  ;) (when you want to shift gear, close the throttle , count till ten and than shift the gear)
« Last Edit: January 13, 2017, 06:30:31 pm by randall »
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huub

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Re: heavy clutch
« Reply #6 on: January 26, 2017, 04:54:49 pm »
you've found out the gearchange on the falcone is a bit crude, they are all like that.
just take your time , just  like driving a car with a non synchronised gearbox.
i can actually double clutch mine, by using the neutral between the gears :-)

you might want to have a look at the clutch , sounds like somebody added spacers , or stronger clutch springs.
the clutch  shouldn't be harder to operate  than your morini.
if you in there check the clutch basket, the basket tends to get  nothed by the plates,
if it is  the clutch doesn't disengage properly, making the gearchange even harder.
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marcbeez

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Re: heavy clutch
« Reply #7 on: January 27, 2017, 01:01:39 pm »
thanks Newbie,
i've been double clutching on the downshift, works fine. I replaced and rerouted the clutch cable with a new one and oiled it with teflon oil , works better. waiting now for a kit of nylon coated cables . I'll check the clutch to see if everything is standard.
cheers
marc
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banquo

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Re: heavy clutch
« Reply #8 on: February 01, 2017, 04:51:51 am »
The clutch cable operates a shaft set into the timing cover. It's not well lubricated, and can seize. Relatively easy job to remove the timing cover, making sure NOT to dislodge the timing gears. The shaft can then be removed, cleaned and lubricated. I've not had mine off, but I did buy a spare timing cover with a very stiff clutch shaft that responded well to a strip and clean.
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