Topic: modified throttle, shorter travel way ?

[bjbuchanan]

I would agree with the 30% bc IMO you dont want to little twist and thirty would probably kill the need to re-grip for full throttle

[MCRider]

Many threads on this subject. Not really much market for a quick throtle on an old street bike. IF you reduce the rotation you increase the effective return spring pressure and that's what most people complain about.

I think using a throttle tube from a different bike is the easiest route. Mike said he uses an R1. I've heard the the CBR900 and similar models will slip right in.

I have an Italian job on my project. It fits into the stock switch, adding about 1/2" to the stack of stuff on the right side.  Knowiing what i know now about the replacement pipe throttles, I would have gone that way and may still.

PS: They are often called "1/4 turn quick throttles" but in fact are something else, usually more than 1/4 turn as that would be very radical on a street bike. But appropriate perhaps for a dirt bike or a road racer.

[Viktor.J]

WIIIHHOOOO

I have now meassured the switchhouse... and there's plenty of space...
Some how the picture i took with meassure ments dissapered :S
I remember the total distance to be 10 mm - 1 cm... And my throttle grip with wire is about 4-5 mm.. så you should have a few mm to bouild up the throttle grip...

I figure im going to order a new plastic grip (mine was metal :S ) and modify that one (dont wanna destroy stock).... I guess the procedure would be building it up, sand it down to fitment..

Any one have any Ideas to what material (plastic) that could work ?




HAHA I Just figured, if you look at the first picture.. where the cable attaches that would be the max radius that fits in the switch housing, right ?

[MCRider]

If you're going to order a new pipe throttle, why not try the CBR900 or as Mike said an R1? The work's already been done for you.

[bollingball]

Mc How would I look up the part what year R1 or CBR900. They allways want the year and model
Ken

[MCRider]

Mc How would I look up the part what year R1 or CBR900. They allways want the year and model
Ken

Well that's the rub isn't it? For the R1 I'd PM MRieck for details. Mike said it worked.

As to the CBR900/929 etc., I've just read about this, here and elsewhere. I think Kit put one in her CB650, she hasn't been on line for a while that i've noticed. My guess is that if you check out several microfishies on the CBR, you'll find the part number is the same for multiple years. Sp pick one.

I'm guessing these are less than $10, so within my threshhold for speculation buying. You may be uncomfortable with such an approach.

If I were really interested, and i may be later, I'd go to a salvage yard like CycleRecycleII and dig thru their boxes of throttles.

[bollingball]

http://www.westernhillshondayamaha.com/fiche_section_detail.asp?section=2100127&category=Motorcycles&make=HONDA&year=2001&fveh=124413

#8 is the best I have found. I don't know if these bikes had 7/8ths bars.
Ken

[MCRider]

http://www.westernhillshondayamaha.com/fiche_section_detail.asp?section=2100127&category=Motorcycles&make=HONDA&year=2001&fveh=124413

#8 is the best I have found. I don't know if these bikes had 7/8ths bars.
Ken

Curious it seems they sell the pipe and grip together?
As to the bars, I would normally say all jap bikes are 7/8, but some of the newer Jap (Metric) cruisers may be 1". I don't know either for an absolute fact.

[bollingball]

I will pm Mike the only R1 I found was a single cable. I noticed that about the grip. Same for the C,F or RR. If it works I might get the grip for the other side . If I like how it feels. Thanks any way.
Ken

[MCRider]

I will pm Mike the only R1 I found was a single cable. I noticed that about the grip. Same for the C,F or RR. If it works I might get the grip for the other side . If I like how it feels. Thanks any way.
Ken

My R1 Fishy (Motogrid) for a 2008 R1 shows it as a 2 cable pipe throttle. What may have thrown you is that the cable itself is combined into 1 part number, rather than 2 separate cables. Still a 2 pull cable though.  Curious that they include the grip with the pipe, same as the honda.

[Viktor.J]

I found a CbR900  grip in Ebay.. asked the seller about the outher diameter, she answered 32 mm... Thats not so big, isn't that the exact size of the original ? 22 inner dia, and then around 5 mm per build up for throttel leverage = 32 mm...

[TwoTired]

Unless your bike has accelerator pump carbs, CV types, or fuel injection.  Moving the slides faster on throttle twist is a recipe for increased hesitation in acceleration.  imo
I suppose you could mediate this issue with making the carb set up very sloppy rich.

Cheers,

[MCRider]

Unless your bike has accelerator pump carbs, CV types, or fuel injection.  Moving the slides faster on throttle twist is a recipe for increased hesitation in acceleration.  imo
I suppose you could mediate this issue with making the carb set up very sloppy rich.

Cheers,

I understand your concerns. And certainly success may be on a model to model basis.

From personal experience: stock CB750K2 carbs (no pumps) and Mikuni VM29 (no pumps) are not overwhelmed by the increase rapidity of slide movement. For my purposes, it was a huge improvement. Reduces the peception of needing to grab 2 handfuls and it increases response. No special jetting wsa needed for the throttle itself.

Downside as i've mentioned is it increases the effort needed to turn the throttle. And it increases response (I said that already?) which has the downside of twitchiness.

A real man can handle the downsides. 

[TwoTired]

I did say you can overcome by making the carbs sloppy rich.  But, if you don't care what sort of fuel economy ($) you get, it will "run well (enough) 'til parked". 


These days, it seems a "real man" must act (react) before thinking about why, and what for, and then adapt to the outcome.

Reminds me of a Pee-Wee Herman quote.  "I meant to do that."

Pee Wee's Big Adventure - Bike Flip