heavy clutch

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syrup head
Posts: 24
Joined: Wed Apr 24, 2013 1:52 am

heavy clutch

Postby syrup head » Fri Jun 09, 2017 12:42 pm

Hi
The clutch is heavy on my 250 scrambler any tips on how to make it lighter to use.I seem to recall someone suggesting fitting 3 lighter and 3 standard springs.

Jordan
Posts: 1380
Joined: Fri Dec 24, 2010 11:29 am

Re: heavy clutch

Postby Jordan » Fri Jun 09, 2017 11:12 pm

Heavy clutch action can be caused by the clutch cable, if it's dry of lubricant, or has too much of tight bends.
It's better for it to have smooth curves with big arcs.
250/350 don't have particularly heavy clutches. The 450 has stronger springs.

graeme
Posts: 938
Joined: Sun Mar 25, 2012 12:00 am
Location: Tasmania Australia

Re: heavy clutch

Postby graeme » Sat Jun 10, 2017 12:46 am

Even 450's aren't heavy.
As Jordan said, the routing of the cable is the first place to look.
Lube with light machine oil.
Then look at the clutch basket and steel plates for burs and notches.
The clutch actuating arm that the cable connects to for wear or lack of lubrication.
The balls and pushrods from actuating arm to pressure plate are clean and lubricated

Graeme

Moto Chuck
Posts: 81
Joined: Sun May 18, 2014 4:16 pm
Location: Kansas, USA

Re: heavy clutch

Postby Moto Chuck » Sat Jun 10, 2017 4:59 am

Another vote for checking and lubing the cable before screwing with the clutch basket. Clutch won't be as light as modern hydraulic clutches but should not be that much harder.

Eldert
Posts: 771
Joined: Sun Nov 01, 2009 3:23 pm
Location: Hazerswoude Rijndijk Netherlands

Re: heavy clutch

Postby Eldert » Sat Jun 10, 2017 7:53 am

narrow or widecase scrambler ?

the narrowcases have a very short actuating arm . on the widecases they made the arm longer .

you could use a wc arm if you make a slot in the case

.
250 motocross engine 002.JPG



Eldert
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amartina75
Posts: 347
Joined: Tue Aug 21, 2012 1:13 am
Location: Cincinnati, OH. USA

Re: heavy clutch

Postby amartina75 » Sat Jun 10, 2017 12:51 pm

The longer arms on the widecase bikes makes a huge difference. My 450 clutch is nice and smooth, but my 250 NC clutch was not. Worn parts, too much play, dirty dry cable, it all adds up. Eliminate all the excess play in the system. Your clutch arm and lever likely need bushings fit. Once I went through mine and adjusted everything just right it was WAY better, but still not as nice as a widecase. Aaron
1966 250 Scrambler
1970 450 Jupiter


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