Clutch actuator arm extension mod kicks ass....Thanks Rog!
Retired
Joined: Mar 2003
Posts: 37,967
From: .
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
Finally got the time to cut the arm and lengthen it........Wow.....what a huge difference. I fitted the bike up w/ a new ASV F1 shorty lever and I can't even describe how buttery this new setup feels. It takes such little effort, I found myself "over-clutching" the first few times getting used to it. As far as I know, OMR came up w/ the idea for the mod, if not.....I've yet to hear of someone else talk about it. I would list this mod right behind "cage" in a list of things to do while building a stunt-bike. I was shocked at the difference..........Thanks Rog!
For an f4i you can make it 9mm longer before it can't be reinstalled.
Last edited by NINER; Dec 3, 2007 at 08:48 AM.
The Ego
Joined: Aug 2006
Posts: 2,865
From: Amazingstoke
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
Does 9mm make a noticeable difference?
I've routed my cable so there's nothing touching it and also have an easy pull, but its not quite buttery enough for me.
I've routed my cable so there's nothing touching it and also have an easy pull, but its not quite buttery enough for me.
bp chaser
Joined: Oct 2002
Posts: 85,659
From: LI, NY and I drive in Australia
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
Yes 
Ive had it for a couple years, the europeans have been doing it since the 90s
i thought i invented it too but im told i was not the first...
routing your cable so there is a nice wide arc helps to make your clutch buttery also.. clean and lube the cable once in a while will help too
and yes it can be done on the f4i also but there isn't as much room to make the f4i as long as you can make the 636
routing your cable so there is a nice wide arc helps to make your clutch buttery also.. clean and lube the cable once in a while will help too
and yes it can be done on the f4i also but there isn't as much room to make the f4i as long as you can make the 636
bp chaser
Joined: Oct 2002
Posts: 85,659
From: LI, NY and I drive in Australia
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
Definitely noticable. IMO, with the +9mm and the ez pull lever on level 3, it was too easy and there was too much clutch drag during coasters. Right now I have the +9mm and the ez pull lever on setting #2 and I like that the best.
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
Trying to help you out OMR and make it easier to understand because it took me a second too since I'm bike illiterate. Take the circled piece off the bike and bring it to a welder and have him add 1/2" or 5/8". Not sure of the exact amount because I didnt do it but OMR says 1/2" or 10mm I think it was. 
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
I'm gonna eventually do this mod too. I dont remember where OMR said to cut it - whether its at the top of the arm or the bottom? I think he said dont do it in the middle though. Where did you cut yours Mike or does it not matter? I'm sure OMR will chime in too shortly - when he wakes up anyway.
Retired
Joined: Mar 2003
Posts: 37,967
From: .
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
Trying to help you out OMR and make it easier to understand because it took me a second too since I'm bike illiterate. Take the circled piece off the bike and bring it to a welder and have him add 1/2" or 5/8". Not sure of the exact amount because I didnt do it but OMR says 1/2" or 10mm I think it was.
bp chaser
Joined: Oct 2002
Posts: 85,659
From: LI, NY and I drive in Australia
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
I'm gonna eventually do this mod too. I dont remember where OMR said to cut it - whether its at the top of the arm or the bottom? I think he said dont do it in the middle though. Where did you cut yours Mike or does it not matter? I'm sure OMR will chime in too shortly - when he wakes up anyway.
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
9mm it is. I'm a good listener homie. 
Where did you cut yours?
I remember OMR saying cut it at one end and not the other for leverage or some **** like that.
Where did you cut yours? I remember OMR saying cut it at one end and not the other for leverage or some **** like that.
Retired
Joined: Mar 2003
Posts: 37,967
From: .
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
Cut it in the middle. Grind the weld smooth and spray paint it. You may have to tweek the angle of the cable guide thing that hold the end of the clutch cable.
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
. As it gets colder
I'm gonna do this mod. 
Registered User
Joined: Aug 2003
Posts: 181
From: Somewhere in Europe
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
http://www.thumperfaq.com/clutch_act.htm
Any help?
also known as OMR
Joined: Jul 2006
Posts: 79,288
From: OMR INDUSTRIES in west palm beach florida
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
hahaha it's funny how people remember things or should i say don't remember things...lol
you can cut it any where on the flat top peice just don't get to close to the part that holds the cable because you don't want to limmit it's range of motion and it will make it hard for you to grind down the weld if you choose to do so and 1/2 inch on a 636 is the minnimun i would extend it and 3/4 is the most the longer the easier but if you go any longer then 3/4 you will run into adjustment problems
you can cut it any where on the flat top peice just don't get to close to the part that holds the cable because you don't want to limmit it's range of motion and it will make it hard for you to grind down the weld if you choose to do so and 1/2 inch on a 636 is the minnimun i would extend it and 3/4 is the most the longer the easier but if you go any longer then 3/4 you will run into adjustment problems
also known as OMR
Joined: Jul 2006
Posts: 79,288
From: OMR INDUSTRIES in west palm beach florida
try and explain some thing to durty when he is jacked and you will understand..lol 
Thread Starter
Registered User
Joined: Jun 2006
Posts: 5,896
From: Where the grapes and ganja be growin!
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
I went about 9/16", and the difference is amazing. I could see how 3/4"+ could cause adjustment issues. For a standard recomendation, I think Rog is spot on w/ 5/8". Listen to the Old Man!!!
also known as OMR
Joined: Jul 2006
Posts: 79,288
From: OMR INDUSTRIES in west palm beach florida
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
yep and if you go too much more then 5/8 then you have to start modifying the part that holds the cable to the motor so it doesn't fray the cable
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
also known as OMR
Joined: Jul 2006
Posts: 79,288
From: OMR INDUSTRIES in west palm beach florida
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: Clutch actuator arm extension mod kicks ***....Thanks Rog!
I remembered that you said 1/2" or 5/8". Besides that I made sure I put the disclosure of "Not sure of the exact amount because I didnt do it but OMR says 1/2" or 10mm I think it was." Made sure that I put in the I think.
