10 replies to this topic

[hewson]

Hi All

How long can i lenghten the engine clutch arm on a 125 pro twin shock (very similar to the 240 pro) to make the clutch lighter . Also as anybody got any photos of the set up ????? Cheers Merry Xmas

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[AHAMAYfrank]

I don’t have any Fantic experience so I don’t know if this will work for you. I have a Yamaha TY250 that the clutch pull was very stiff. I installed an aftermarket lever that has three positions for the inner cable end on the lever. I run mine in the position closest to the handlebar giving you the most leverage, but least cable travel and it works very well. One finger operation and still disengages the clutch completely. It seems to work fine when the engine is hot as well.

Frank

[htrdoug]

What gear oil are you running?My 240 clutch gets a reasonable level of effort when I run ATF in the trans,but it starts to shift stiffly after about 20 sections of a trial,I'm gonna try 50% atf and 50% 80 weight gear oil and see how well it does.ATF is about 5w and 80 weight is about 10w in motor oil equivalent in my unscientific tests. I am also going to experiment with the basic clutch engagement adjustment at the center of the clutch vs. the cable adjustment to see what the effects the internal cam position has on the feel of the clutch.

[hewson]

Hi

I'm running silkolene light gear oil , which i change every 5 trials ,i have a spare engine clutch arm which can be chopped and extended if anybody as more info ,i'm pretty sure this is the way to go for a

lighter clutch action .....

[B40RT]

Dont know about Fantic but have extended arms by about 10mm, usually there is some internal constraint anyway.

[isaacely]

Are you sure your not limp wristed.

[hewson]

[IanPR]

My 300 Pro had an extended arm & it made a huge difference - with a short ' 2 finger' clutch lever you could feather the clutch with 1 finger in a section. I got it with the mod.

I no longer have the bike (stupid mistake - selling it!) so I cant measure it for you, but there was a clearance limit to what you could add. It took a bit of time to adjust as well because of the longer throw on the lever, otherwise it would slip. Also found a good well lubricated cable was critical.

Ian

[axulsuv]

When I get a moment I'll measure my clutch arms for ya , But with a longer arm you do have to run a domino lever to get enough cable travel . And Chris at http://www.classictr...o.uk/index.html Makes a very sturdy kit to do the update quite nicley.
Glenn

[Sivy]

Hi

Try here http://pagesperso-or...kprepaafata.htm

Regards

[hewson]

Hi All

A few photos of a clutch extension arm for the fantic engine ( cheers for that Peter ) . Its made the clutch is a lot lighter.............

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Edited by hewson, 10 January 2010 - 11:25 AM.