HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
yam 3

Single throttle cable?

11 posts in this topic

I was wondering if you can run just one cable to the carb? I would like the throttle to turn a bit easier, like my two smoke. Any reason not to? 06 yz450. :ride:

Share this post


Link to post
Share on other sites

I do not believe this will work. The system is designed for a 2 cable design. With a accel pump you need this type of system

Share this post


Link to post
Share on other sites

DO NOT unhook or remove the second cable.

On a 2-stroke carb, the cable pulls the slide open and a spring closes it. On a 4-stroke carb, one cable pulls the slide open and the other pulls the slide shut. It is spring assisted, but necessary in order to assure that the throttle closes. The 4-stroke carb also has a special slide that has rollers to help remove any stiction. All of this is necessary due to the high vacuum created at the carb on a 4-stroke.

Share this post


Link to post
Share on other sites

Then tell me why the YFZ450 only uses one cable with the same carb? I'm not arguing the fact. I'd just like to know.

Share this post


Link to post
Share on other sites

I coudnt care less about quads either way, but this would be my guess:

the YFZ450 has a thumb-actuated throttle with the return spring built in which closes the throttle so there is no need for a second cable

Share this post


Link to post
Share on other sites
Then tell me why the YFZ450 only uses one cable with the same carb? I'm not arguing the fact. I'd just like to know.

The quad is electronically controlled with this part

5TG-8259A-00-00 .SWITCH, CARBURETOR

to assist it in running with single cable.

The bike does not have it.

Share this post


Link to post
Share on other sites
I was wondering if you can run just one cable to the carb? I would like the throttle to turn a bit easier, like my two smoke. Any reason not to? 06 yz450. :ride:

Yeah, what wheel said, four strokes create more vacuum which suck's more on the slide and it can stick open. The second cable is there for your safety.

Share this post


Link to post
Share on other sites

You can do it if you want, but do it at your own risk. You'll need a single cable throttle since your current one has no stop built into it, instead relying on the return cable for that.

Unless you have something significantly wrong with your throttle return cable, removing it won't reduce the twist effort in any noticeable way. I advise against it.

Share this post


Link to post
Share on other sites

I rode my '00 WR400 for about 2 months without the second cable with absolutley no problems.

I did this only because the rebound cable was so freighed it didn't work properly and hung the idle really bad. I had drove 3 hours to ride that morning and wasn't gonna sit at the truck while my buddies rode. After riding all weekend I wasn't in any hurry to spend $50 on cables.

Would I remove it if it worked properly...no.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0