anybody run a 1/4 turn throttle on the street? - Chicagoland Sportbikes
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post #1 of 28 (permalink) Old 08-26-2003, 03:27 AM Thread Starter
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anybody run a 1/4 turn throttle on the street?

I got a 1/4 turn throttle along with a bunch of other stuff from a wrecked racebike for dirt cheap. I kinda wanna put it on because I literally have to strain my wrist to get it to go full throttle, but if it's too twitchy then I might just put it on ebay. Anybody have any experience with a 1/4 or 1/5 turn throttle?
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post #2 of 28 (permalink) Old 08-26-2003, 08:05 AM
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thats more of a drag throttle set up, never the less, it will work for a track of street set up no problem, your just going to have to re get use to the throttle again.
since your putting it on a non liter bike, i wouldnt be to worried about being to snappy.



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post #3 of 28 (permalink) Old 08-26-2003, 02:06 PM
 
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That is meant for the track not the strip, but you can use it anywhere..
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post #4 of 28 (permalink) Old 08-26-2003, 03:02 PM
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yeah you can use it anywhere, but started off at the drag strip in the early 70's when they started getting into rev limiters.



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post #5 of 28 (permalink) Old 08-26-2003, 04:53 PM Thread Starter
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Quote:
Originally posted by Odysseys
thats more of a drag throttle set up, never the less, it will work for a track of street set up no problem, your just going to have to re get use to the throttle again.
since your putting it on a non liter bike, i wouldnt be to worried about being to snappy.
I can get my 500 mile m1 to step out in a corner and my bike doesn't even make that much power...I do worry how snappy it is
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post #6 of 28 (permalink) Old 08-26-2003, 04:59 PM
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humm, well then try it and see if you like it , you can always change it back its worth the try to see how it feels.




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post #7 of 28 (permalink) Old 08-26-2003, 05:27 PM
 
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I have a relatively short turn throttle on my flatslides and I like it.
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post #8 of 28 (permalink) Old 08-26-2003, 05:49 PM
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Interesting, this conversation came up when I was attending American Supercamp earlier this year. The short of it is they advised against it as it hurts your ability to modulate the throttle making the bike harder to handle while accelerating out of turns. Chris, Danny and a couple of the visiting go fast boys all chipped in on this and discussed their lap times and number of crashes with a "normal" throttle vs. 1/4 turn throttle. They all said just don't do it.

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post #9 of 28 (permalink) Old 08-26-2003, 06:06 PM
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it will be alittle more tricky, thats why i bet it never caught on for the track and more for drag racing with rev limiters.

but flat slides..oh yeah babY!



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post #10 of 28 (permalink) Old 08-26-2003, 08:00 PM Thread Starter
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Ironically enough I also got a set of flatslides in this deal....Larry, will this reduce the turn on the throttle, or did you modify your cables?
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post #11 of 28 (permalink) Old 08-26-2003, 08:20 PM
 
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I think the flatslides have a shorter turn naturally...On top of that, I bought a push-pull throttle set-up to match. You MUST have push-pull, flatslides are notorious for hanging open, that is one reason they have heavy return springs.

Remember, mine is a street only bike so far. You definitely have to be very smooth with flatslides, let alone the quick ratio throttle. Try it and see if you like it, there is nothing like the response of properly set-up flatslides (except maybe a really good FI).

Also FWIW, when I was with 4&6 Racing, our riders used short turn throttles on national-level 600's.
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post #12 of 28 (permalink) Old 08-26-2003, 08:24 PM Thread Starter
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Is push pull setup different then a throttle cable and a return cable setup or just 2 different names?

To be honest I don't know shit about flatslides. I know they're a hot setup, and this guy was practically giving this stuff away so I scooped them up. I have a street bike as well, track days aren't in my budget, but I can't leave well enough alone, I always gotta play with stuff.
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post #13 of 28 (permalink) Old 08-26-2003, 08:56 PM
 
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Same thing, different names. www.factorypro.com has some good flatslide tuning guides. They can be a real bitch to get right, and they can be tempermental, but I doubt I will have another bike with CV carbs...
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post #14 of 28 (permalink) Old 08-28-2003, 01:10 PM
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if you dont use the 1/5 throttle let me know id be interested in buying it.
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post #15 of 28 (permalink) Old 08-28-2003, 02:01 PM
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i just installed a 1/5 throttle kit on my my gsxr. I had a problem getting full throttle on straights because my riding postion caused my wrist not to fully bend to get full throttle. I have yet to use it

I know that this is going to mean more care is needed in exiting corners, but that is easy to adapt to.

it was any easy install on the gixxer.

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post #16 of 28 (permalink) Old 08-28-2003, 07:02 PM Thread Starter
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Quote:
Originally posted by Pugsly
i just installed a 1/5 throttle kit on my my gsxr. I had a problem getting full throttle on straights because my riding postion caused my wrist not to fully bend to get full throttle. I have yet to use it
Let me know how it goes, that's basically the same problem I was having.
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post #17 of 28 (permalink) Old 08-28-2003, 07:09 PM
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Quote:
Originally posted by Pugsly
i just installed a 1/5 throttle kit on my my gsxr. I had a problem getting full throttle on straights because my riding postion caused my wrist not to fully bend to get full throttle. I have yet to use it

I know that this is going to mean more care is needed in exiting corners, but that is easy to adapt to.

it was any easy install on the gixxer.
i put one on my track gixxer too. it took getting used to. i have a very steady throttle hand and I was able to spin up the rear out of turns till i got used to it. easier to get to WOT but almost scarey. I plan to go back to stock for now.

Chris
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post #18 of 28 (permalink) Old 08-29-2003, 12:18 AM
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I just installed one on my gsxr 600 (1/5)but have yet to use it..
I was having the same problem of not twisting up the throttle all the way..
I picked up this one that just mod's the stock 1/4 turn to 1/5 turn
$25 + shipping
http://www.brgracing.com/1-5instructions.html

I haven't used it yet.
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post #19 of 28 (permalink) Old 08-29-2003, 08:04 AM
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Quote:
Originally posted by Ohfugit
I just installed one on my gsxr 600 (1/5)but have yet to use it..
I was having the same problem of not twisting up the throttle all the way..
I picked up this one that just mod's the stock 1/4 turn to 1/5 turn
$25 + shipping
http://www.brgracing.com/1-5instructions.html

I haven't used it yet.
"D"
same one i bought

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post #20 of 28 (permalink) Old 08-29-2003, 09:22 AM
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Quote:
Originally posted by Pugsly
same one i bought
me too.

Chris
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post #21 of 28 (permalink) Old 10-07-2003, 08:18 PM
 
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Damn, to used to low wrist you learned in MSF?? Dude, just reach way over the freken bar, grab the rubber and twist. More room for error if you have a lot of turn in your throttle for wheele's unless your name is Nicky Hayden
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post #22 of 28 (permalink) Old 10-07-2003, 08:42 PM
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I used it at blackhawk last time out.
I thought it was great.. yes I did have to be a little more careful to be smooth coming out of the slow corners
I but I was getting the throttle open no problem on the straights..
mind you this is an old srad 600 and not a 1000 or anything.

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post #23 of 28 (permalink) Old 10-08-2003, 01:15 AM Thread Starter
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I ended up not using the 1/4 turn kit I got, I think it was broken and the flatslides did a nice job of shortening the twist up some.
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post #24 of 28 (permalink) Old 10-14-2003, 09:46 PM
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question

I am thinking about putting a set of flatslides on my old school GSX-R. The main use of the bike is just an every day rider, and the strip about once a month. After reading that they must be tuned just right and this can be a bi*=h to do I'm wondering is this not a good idea? If I did it the ideal set up I had in mind was 38mm flatslides, K&N filters, stage 3 jet kit, and switch the Yosh pipe to a Hindle. Then maybe after all of this is done I might look more into the 1/4 or 1/5 turn throttle kit, and a used bike to be my every day rider.

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post #25 of 28 (permalink) Old 10-14-2003, 10:16 PM
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go with the flatsides once there tune you wont regret it!
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post #26 of 28 (permalink) Old 10-18-2003, 11:25 AM
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Quote:
Originally posted by twistedspeed
go with the flatsides once there tune you wont regret it!
This is what I keep hearing. If I go with the 38mm and they are tuned right I was told it's an easy extra 10hp right there. The only problem I'm having now is my local dealership doesn't know the size of my stock carbs., and has no info. on flatslides or who to get them from. Anybody know of a GREAT performance shop around the Glen Ellyn area?

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post #27 of 28 (permalink) Old 10-18-2003, 02:27 PM
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I had 38 mm'flatslides on an fj1387
I borrowed a set of 36 mm flat slides and it was only something like 4 100ths of a sec slower on the quarter mile and they were m better in the midrange rpms
your milage may vary but just thought I'd mention it.

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post #28 of 28 (permalink) Old 10-18-2003, 07:16 PM Thread Starter
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I'm really happy with the 35mm Keihin flatslides I've got on my '98 F3. Flatslides+Full system made this thing a beast. I'm looking forward to dyno tuning it this winter to see what I can get out of it.
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