Throttle Cable Conversion?

I am looking at purchasing an internal throttle and am wondering if there is any way to convert a kz 650 from dual throttle cable to a single? Slightly off the wall question, but I am curious.

I believe you're trying to eliminate the return cable. It's there as a safety measure but it's not absolutely necessary for the throttle to function. Just pray you never break the return spring.

KZCSI

i ran dirtbike style throttles on my bikes for years,never had a return spring problem with 26-29mm style carbs.im never run cv carbs before though;)

i don't have a second cable on either bike....never had a problem. (yet:whistle: )

Yeah it's the "yet" that I am worried about. I know for example that the ridiculously priced Exile Cycles internal throttle is advertised as able to convert a carb to a single cable system because of the spring in the grip. That is wonderful except I don't want to spend $200 but rather $50 on an equivalent off of ebay. Well, guess I will go ahead and try it and let you guys know if I end up in the hospital.

just check out the return spring every so often to head off any possible problems and you should be fine.

arobsum wrote:

just check out the return spring every so often to head off any possible problems and you should be fine.

You know, that might be a good component to replace periodically just for safety sake.

Could be mistaken, but don't recall any of the classic Brit bikes with anything more than a single throttle cable. My first rice burner was a CB750 Honda which had both cables (one pulls open, the other pulls closed). Maybe it's a product liability thing.

Various throttle helper gadgets are available. Another alternative is to substitute a weaker spring from the local hardware store. Yet another is to use both cables and remove the return spring, but this is dangerous (especially until adapting to it) and in a tip-over situation allows the engine to rev way over the limit while on its side.

Just guessing, but seems the OEM return springs are designed strong enough to help overcome an owner's failure to lube the throttle linkages at both handlebar and carb.

Have experimented with all the above, and resolved to using both cables with the stock spring and a friction type throttle helper as a poor man's cruise control.

One advantage of using both cables is having the closing cable on hand for use as a spare should the opening cable break.

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Return spring break? Hell, that's why the kill switch is there

My '76 Suzuki GT550 has two cables and no return spring. When the return cable breaks you can't close the throttle.

I left my house one afternoon and rode about a half mile from my house and let off the throttle to stop at a stop sign. To my suprise the bike didn't slow down. The first instinct was to just pull the clutch which I did. The engine reved really high and I hit the kill switch.

I live outside of a city so there wasn't much traffic and I was able to quickly shut the bike down. If that were to have happened in traffic it could have been interesting.

To get home I started the bike and used my left hand to push the throttles closed after I shifted into 2nd. I was able to make it home in 2nd. I learned a lot that day :ohmy:

H1Vindicator wrote:

Patton wrote:
One advantage of using both cables is having the closing cable on hand for use as a spare should the opening cable break.

. JMK.[/quote]thats exactly what i used mine for!!