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Main Area => General GS500 Discussion => Topic started by: WREX on September 14, 2005, 01:21:16 PM

Title: 1/4 throttle - how to?
Post by: WREX on September 14, 2005, 01:21:16 PM
besides going with the sv650 throttle and 1/4 throttle converter - what other ways are there to get a 1/4 throttle for the gs?

thanks for any ideas
Title: Yea
Post by: The Buddha on September 14, 2005, 01:23:48 PM
Yea ... I will sell you a whiz bang, super duper, magical 1/4 throttle converter that will fit into the bike with no mods at all ... $100 and shipping ... Yea ... comes with its own custom throttle grip as well ...
Cool.
Srinath.
Title: 1/4 throttle - how to?
Post by: dgyver on September 14, 2005, 01:36:02 PM
Buy an expensive  racing 1/4 throttle assembly.
Title: 1/4 throttle - how to?
Post by: WREX on September 14, 2005, 01:57:26 PM
guess the sv option ain't so bad then.   thanks
Title: 1/4 throttle - how to?
Post by: ttsquirrel on September 14, 2005, 02:06:00 PM
Being medicated leaves me lost....
what is a 1/4 throttle
Title: what
Post by: The Buddha on September 14, 2005, 02:28:04 PM
OK the GS has 1/4 throttle stock ... doesn't it ... SV will give you 1/5th ... I thought ...
Cool.
Srinath.
Title: 1/4 throttle - how to?
Post by: mjm on September 14, 2005, 03:22:24 PM
Quote from: ttsquirrelBeing medicated leaves me lost....
what is a 1/4 throttle

what portion of 360 degrees you have to turn the throttle fom idle to wfo
Title: Re: what
Post by: dgyver on September 14, 2005, 03:42:35 PM
Quote from: seshadri_srinathOK the GS has 1/4 throttle stock ... doesn't it ... SV will give you 1/5th ... I thought ...
Cool.
Srinath.

Yeah the SV tube will make it a 1/5 turn
Title: 1/4 throttle - how to?
Post by: stefman722 on September 14, 2005, 04:01:03 PM
Whats the advantage of changing the throttle.
Title: Re: what
Post by: The Buddha on September 14, 2005, 04:40:53 PM
Quote from: dgyver
Quote from: seshadri_srinathOK the GS has 1/4 throttle stock ... doesn't it ... SV will give you 1/5th ... I thought ...
Cool.
Srinath.

Yeah the SV tube will make it a 1/5 turn

Waaaaa waaaa ... you ruined my chance to make a $100 bucks ... I'd have sold the dude a stock GS tube and made off with a franklin note man ...  :x
Cool.
Srinath.
Title: 1/4 throttle - how to?
Post by: dgyver on September 14, 2005, 04:47:19 PM
Quote from: stefman722Whats the advantage of changing the throttle.

1/4 throttle = 90* turn
1/5 throttle = 72* turn

Less turning required to go from off throttle to WOT. With a standard throttle you have to bend your wrist more and sometimes reposition it. It does make the throttle a little more jumpy, not a real problem for the GS.
Title: Re: what
Post by: dgyver on September 14, 2005, 04:49:17 PM
Quote from: seshadri_srinathWaaaaa waaaa ... you ruined my chance to make a $100 bucks ... I'd have sold the dude a stock GS tube and made off with a franklin note man ...  :x
Cool.
Srinath.

Get over it.  :roll:
Title: 1/4 throttle - how to?
Post by: WREX on September 14, 2005, 06:35:15 PM
ooops - don't know what I was thinking when I said 1/4.  :oops:  I meant the shortest twist distance, which is obviously 1/5.  

you guys should have kept it going - the trusting sucka I can be sometimes, I might have shelled out the $ to Srinath for the stock throttle!  :)


So is going with the sv650 throttle and adapter from www.brgracing.com the cheapest way to go for this?
Title: 1/4 throttle - how to?
Post by: dgyver on September 15, 2005, 05:42:04 AM
Quote from: WREXSo is going with the sv650 throttle and adapter from www.brgracing.com the cheapest way to go for this?

You just need the SV throttle tube. The SV throttle tube alone is like adding an adapter to the GS throttle tube. Adding an adapter to the SV tube on the GS would make it an even shorter turn, 1/6 maybe. I have all these parts if you want a comparison picture.
Title: 1/4 throttle - how to?
Post by: WREX on October 03, 2005, 01:18:00 PM
just some info I thought I'd pass along in case anyone else was looking

I ended up finding an SV650 1/5 throttle (advertised to fit all 03 TO 05 SV650S,SV650,SV1000S,SV1000) on ebay for 25 bucks.  it was a complete grip tube and even a grip already on it.  I installed it last weekend and fits fine in my stock 96 throttle switch housing.  had to adjust the cable to give a bit more slack, but other then that, no cutting and works just fine.  I really like the shortened twist feel now and it doesn't make our bikes too twitchy  :)

While I didn't see a particular listing for the throttle itself, they confirmed with me that they are available and can be contacted via info here on their website

http://www.spearsenterprises.com//


here's an active auction for a description and pic.
http://cgi.ebay.com/ebaymotors/SUZUKI-SV650-SV650S-SV1000S-5TH-TURN-THROTTLE_W0QQcmdZViewItemQQcategoryZ10066QQitemZ4579065172QQrdZ1QQsspagenameZWDVW



lastly - looking at it up close and comparing it with the stock one, i was thinking that all it is, is the diameter of the circle that the throttle cable wraps around is larger then stock by a little bit.   i think that one could fab up a plastic trim that's about  3/4 circumference of a full circle and a few mm thick to add to the diameter and that would do it.

either way, hopefully any of these options are helpful to those that might be have beening thinking about something similiar.
Title: 1/4 throttle - how to?
Post by: BigTwin on October 18, 2005, 08:55:39 PM
Hate to bring this back up, but from the way pantablos website says to do this you need the stock sv throttle tube and the 1/5 turn adapter. http://pantablo500.tripod.com/id33.html

Which option is correct? I really hate cocking my wrist to try and go WOT.

It would be nice if all I needed was the stock SV650 throttle tube. Also if you could tell me what year tube I need that would make things a little easier.

Any input would be great, BigTwin
Title: 1/4 throttle - how to?
Post by: blue05twin on October 19, 2005, 07:38:22 AM
bump
Title: 1/4 throttle - how to?
Post by: dgyver on October 19, 2005, 03:10:48 PM
I have not read the write on his site, but you just need the throttle tube. First gen (99-02) were all the same. Not sure about second gen (03+) when they went to FI.
Title: 1/4 throttle - how to?
Post by: pantablo on October 19, 2005, 05:00:56 PM
Quote from: dgyverI have not read the write on his site, but you just need the throttle tube. First gen (99-02) were all the same. Not sure about second gen (03+) when they went to FI.

I'll make a note of that. I dont remember where I got that info before. Probably here somewhere.

Having done my share of trackdays I can attest to the necessity of the 1/5 turn throttle. Its hard to get that last bit...but the kit for the 600rr is expensive.
Title: 1/4 throttle - how to?
Post by: dgyver on October 20, 2005, 07:19:27 PM
Quote from: pantablo....but the kit for the 600rr is expensive.

What is so special about the kit? All the ones I have seen (for Suzuki's) are just a piece of machined plastic that snaps on to the throttle tube increasing its diameter.
Title: Re: 1/4 throttle - how to?
Post by: cobrawannab1 on August 16, 2007, 01:59:31 PM
I just saw this thread.  I know it is old but here is some input.  The bmgracing adapter is for the stock gs throttle tube.  I installed the SV650 throttle tube and the diameter is the same as a stock GS with the bmgracing piece on it (I only know because I bought the adapter piece and the SV tube).    By the way my bike is a 2007 GS500F.
Title: Re: 1/4 throttle - how to?
Post by: ben2go on August 16, 2007, 02:45:52 PM
I got a SV 1/5 turn+grip  for $30 off ebay.It only turns about 35* to  45*.It turns so little to reach full throttle it's hard to ride.

REVISE Did the math and I have roughly a 1/6th turn,as dgyver stated earlier,without the adapter.It is because of the smaller diameter cam on the carbs compared to the SV's.
Title: Re: 1/4 throttle - how to?
Post by: ohgood on August 16, 2007, 03:37:19 PM
Suppose you could fine tune the amount of pull required for WOT at the carbs.

All it would take would be different size cams. Big cam = longer pull required. Small cam = shorter pull required.

The stock twist is pretty good imho.