Friction Zone and feathering the clutch - Victory Forums - Victory Motorcycle Forum
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post #1 of 77 (permalink) Old 03-05-2018, 01:27 PM Thread Starter
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Default Friction Zone and feathering the clutch

Good afternoon friends! Iím not an expert or technical when it comes to bikes but I wanted to see if anyone has the same problem or knows what might be the root cause. Problem is as follows:

My 05í Vegas does not accelerate or rather does not have a friction zone. I must always
add throttle to go in first gear or any gear.
If Iím at a dead stop, I will stall if I let the clutch out slow while looking for the friction zone and do not add throttle.

A friend who has had bikes says that my bike is too heavy to have a friction zone.
Iím politiely calling bs and think there might be a problem. Anyone know about this?

Thank you

Robert
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post #2 of 77 (permalink) Old 03-05-2018, 02:02 PM
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What oil do you use in your bike? As these are wet clutches a synthetic oil would give you more slippage in that zone your talking about.
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post #3 of 77 (permalink) Old 03-05-2018, 02:41 PM
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dunno about your vegas but neither my former Hammer nor my current Cross Roads will go anywhere with just letting the clutch out. i can't think of any bike i have ever had that would besides one of my sportbikes and my first ducati Monster....
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post #4 of 77 (permalink) Old 03-05-2018, 02:49 PM Thread Starter
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Originally Posted by Tony.v View Post
What oil do you use in your bike? As these are wet clutches a synthetic oil would give you more slippage in that zone your talking about.
Hey Tony, thanks for the response. Iím not sure about the oil but Iíll call the place that did the seasonal work/fluid changes before I took her out on the road.
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post #5 of 77 (permalink) Old 03-05-2018, 02:52 PM Thread Starter
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Originally Posted by MonsterMash View Post
dunno about your vegas but neither my former Hammer nor my current Cross Roads will go anywhere with just letting the clutch out. i can't think of any bike i have ever had that would besides one of my sportbikes and my first ducati Monster....
What up Monster, this is my first bigger cruiser. I learned on a 1200 Sportster and there was a friction zone. Let out the clutch about half way and the bike moved without throttle. Maybe the work buddy was right about the weight of my bike. Thanks for the response.
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post #6 of 77 (permalink) Old 03-05-2018, 03:00 PM
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I gotta call out Tony-v on his comment about syn oils. Not true! If its rated JASO-MA or MA2 it is wet clutch compatible, such as Rotella T6 which many here use, including myself.
+ Is your clutch adjusted per the manual, with the proper amount of slack?
+ Have you been using a non JASO-MA oil? If so, replace it and the filter and put in Rotella T6 as it has a heavier detergent content than others being a Diesel engine oil. It will help to clean out the ravages of that non JASO-MA junk.
+ After doing that, ride 100+ miles and report back.
+ Or...If JASO-MA was put in, your bike can simply have a worn clutch.
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Last edited by RICZ; 03-05-2018 at 03:02 PM.
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post #7 of 77 (permalink) Old 03-05-2018, 03:26 PM
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You have a friction zone. If the bike does not pull with the clutch lever pulled all the way in and does pull fully with the clutch lever all the way out, then you must have passed through a friction zone. I think you are making a basic manual transmission error. There is no reason to worry about how much or how slowly you can release the clutch without simultaneously giving it throttle. The reason this is not a concern is that this is NOT how you should attempt to use the clutch. Instead, you want to simultaneously let out the clutch lever while twisting the throttle. Depending on how slow or fast you want to launch and how fast you want to be going when you have fully let out the clutch determines the rates at which you do the two simultaneous moves. Tiny throttle and slow clutch will creep forward and end with a very slow speed. Lots of throttle and fast clutch will launch you rapidly to a high speed. You simply do not use either control by itself when starting up. You use them together in beautiful concert.

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post #8 of 77 (permalink) Old 03-05-2018, 05:25 PM
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Basic Engineering 1 on 1

Cars, with the clutch you can touch the friction on idle, coz the fly wheel is BIG, this means low RPM engines


Motorcycles, with the clutch you can not touch the friction on idle, it will STALL, coz the fly wheel is SMALL, this means high RPM engines

Cars or motorcycles are not made to grind the clutch on IDLE RPM, just give a bit of gas and ride away, and enjoy the ride ....

I have a 270 CC go-cart and have to rev the [email protected]°? out of it in first gear, coz the flywheel is super small, after that its all smooth

Andre using TaPaTaLk
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post #9 of 77 (permalink) Old 03-05-2018, 06:09 PM
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I'm sure there's a math equation for this but the mass of the bike must be compensated by the power of the engine to get moving just like it would to increase speed or launching from an incline (going up).

That sweet spot is different from bike to bike even with the same brand and model. They may be similar but there is a difference. At some point it's just second nature like, well, riding a bike.
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post #10 of 77 (permalink) Old 03-05-2018, 06:19 PM
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VVegas05....Are you saying that with the engine running and the bike in gear, you can let the clutch lever out all the way to its full extension and the bike will not move?

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