Board index Flathead Power-Technical Questions, Answers, and Suggestions 45 Flatties "Quick-throttle" on a WL

"Quick-throttle" on a WL

Post Fri Feb 18, 2011 2:18 am

Posts: 923
Location: South Provence of FRANCE

here is a pic of the modification :

Image

this is a panhead part .
remove the wire in the throttle side of the handlebar and replace it by a thin throttle-cable
add a "return" spring
super-clean all the internal comps of the handlebar spiral and replace the ol'grease by oil

here is a vidéo of the résult :

http://www.youtube.com/watch?v=r8ivckHZc_k

i know : this is a "basic" upgrade ( and it always make me laugh )
but the owner is a newbie and the original WL throttle system gives him nightmares .....
Last edited by milwaukee belle on Sat Feb 19, 2011 2:55 am, edited 1 time in total.

Post Fri Feb 18, 2011 3:23 am

Posts: 1654
I had a return spring like that on a panhead, although the twist-grip didn't actually return it did make the action smoother
Shoot, a man could have a good weekend in Dallas with all that stuff...

Post Fri Feb 18, 2011 6:12 am

Posts: 923
Location: South Provence of FRANCE

justremove the wire and replace it by a carb-cable ( thin ) and it will work !

Post Fri Feb 18, 2011 11:11 am

Posts: 1676
Location: Interlaken, NY USA

Fran-6, Nice work. What does the Compression release lever on the right bar near the throttle do?
DD

Post Fri Feb 18, 2011 2:44 pm

Posts: 923
Location: South Provence of FRANCE

this tiny lever ( not original :evil: :evil: :evil: :evil: )
wakes up an OEM military siren on the rear wheel :D :D :D :D

Image

( never heard something so loud before :shock: )

Post Fri Feb 18, 2011 8:50 pm

Posts: 3159
Location: Central Illinois, USA
Fran-6!

In American parlance, a spring-assist was often called a "quick-throttle".

....Cotten

Post Sat Feb 19, 2011 2:54 am

Posts: 923
Location: South Provence of FRANCE

great thanks , Cotten .
don't hésitate to correct me if i am wrong ! that helps me a lot !
i have modifyed the title of the post :wink:

Post Sat Feb 19, 2011 6:05 am

Posts: 3159
Location: Central Illinois, USA
Fran-6!

You were not wrong!
There are probably other names as well.
Mechanisms to reverse the direction of the throttle action were sometimes called a "turn-around".

People still make up names, and that is part of the fun!

....Cotten

Post Sat Feb 19, 2011 10:25 am

Posts: 923
Location: South Provence of FRANCE

yes , but it's always good for me to learn how to talk correctly .... :D

Post Sat Feb 19, 2011 4:31 pm
Pa Site Admin

Posts: 5843
Location: Ohio USA

What is with this "talk correctly" Fran-6 ??? You forget..French teacher friend say proper lanquage is not "slang" :lol: :lol:

Post Mon Jun 08, 2015 6:12 am

Posts: 105
I know this is an old thread, but if the images could be re-posted it would great, I am interested in this modification. The YouTube video does not show the mod, just how well it works!!!

Post Tue Jun 09, 2015 5:46 am
Pa Site Admin

Posts: 5843
Location: Ohio USA

Architect wrote:
I know this is an old thread, but if the images could be re-posted it would great, I am interested in this modification. The YouTube video does not show the mod, just how well it works!!!


Milwaukee belle would have used an external link for the pics in his topic. Try PM ing him or emailing him. He has not been on here for quite a spell since he got into the bike parts manufacturing business.

Post Tue Jun 09, 2015 10:29 am

Posts: 105
I emailed him and he sent me a ton of info. Pa, thanks once again for the direction.

Leaving on Saturday for a week in Laconia, this project will have to wait to after I return. Maybe I will order parts before I depart, this way the wait for snail mail will not be killing me.

Post Tue Jun 16, 2015 12:17 pm

Posts: 335
Just out of curiousity: with this kind of throttle, how do you indicate that you want to go right? Use a blinker from now on?

Post Tue Jun 23, 2015 11:18 pm

Posts: 1654
I rode British bikes with self-closing throttles and never found it a problem. How long do you make a signal for? Not long.
Shoot, a man could have a good weekend in Dallas with all that stuff...

Post Wed Jun 24, 2015 11:20 am

Posts: 335
45Brit wrote:
I rode British bikes with self-closing throttles and never found it a problem. How long do you make a signal for? Not long.


Okay what if you have to make a left turn signal and scratch your balls at the same time :roll: . No point is that at least on my 45 when I close the throttle, the motor rapidly slows down, might not be an issue for some, but I would not want that kind of behaviour. I was just wondering if people have found some " cure" for this problem, or simply, like you just take the fact that the throttle closes when you indicate the turn.
It doest not have to be a problem ofcourse, its all personal preference.

Post Thu Jun 25, 2015 5:32 am

Posts: 105
Samsup, here in the USA, we signal turns with our left arm. No issue maintaining throttle with right hand and signalling.

Post Thu Jun 25, 2015 10:47 am

Posts: 1038
Location: Ojo Caliente,NM,USA
Architect wrote:
Samsup, here in the USA, we signal turns with our left arm. No issue maintaining throttle with right hand and signalling.


I just set my lefthand throttle about 1/8 throttle or so then let go and signal. It's all in what you learned on.
Dusty

Post Thu Jun 25, 2015 8:37 pm

Posts: 1654
I usually find that the vibration through the saddle nose does that for me.... sorry, we're getting off the subject a bit....

I don't know about US practice, or European for that matter because I've never ridden a hand-signal bike on the road in either, but UK practice was to signal with either hand depending on direction of turn.

I've always kept road bike throttles set to slowly close. My racing bikes have snap-shut throttles but the only signal you give on those is "engine failure" anyway.
Shoot, a man could have a good weekend in Dallas with all that stuff...

Post Fri Jun 26, 2015 6:08 am

Posts: 105
[quote="45Brit"]

"I don't know about US practice, or European for that matter because I've never ridden a hand-signal bike on the road in either, but UK practice was to signal with either hand depending on direction of turn."

In the USA a system of hand signals were developed using only your left arm. The are the same signals for a car or a motorcycle, hence the left arm only system. This all goes back to before turn signals, but in NYS anyway I believe they are still part of the licensing exam for cars and motorcycles. So with a right hand throttle, I am all good to signal and maintain the carb as needed. I would have guessed the UK had a similar one arm system, just with the right arm, go figure. So they have different methods for motorcycles VS cars to signal a turn??

Now shifting and signalling is a different conversation entirely :D

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