Throttle Body cable adjusment mishap

Not Dead Yet · Post by **Not Dead Yet** » Mon Oct 02, 2006 12:05 am

This was hardly a mishap.....it was simply me putting the cart before the horse and changing the adjustment on the right and left throttle body cable adjustment barrel screw. Without thinking, I adusted the barrel screws without regard to the original positions. I was hoping to step up the idle by doing this, however I now know it is a little more technjcal than that. Fortunately I did not adjust the "Big Brass Screw". I'm concerned the throttle sync is now way off. The bike is new to me and I'm still in the process of learning the bike. Short of taking it in to my dealer for a fix, I'm wondering if anyone has a tecnique for returning the adjustments to known position such as idle or choke mode. Help please.

Sunbeemer · Post by **Sunbeemer** » Mon Oct 02, 2006 6:56 am

See http://advwisdom.hogranch.com/Wisdom/TBS4Dv1.0.pdf

BreadMan · Post by **BreadMan** » Mon Oct 02, 2006 8:39 am

Do you have a Twinmax or access to one?

Not Dead Yet · Post by **Not Dead Yet** » Mon Oct 02, 2006 9:34 am

Thanks for the quick replies. I'm familiar with the Twinmax sync method and with the above referenced tech instructions, however I believe any throttle body cable adjustments as described in the posting make small adjustments to the pre-set positions. My dilema is similar to the initial setting that would need to be found if one were to replace the cables with new ones. What is the initial adjustment starting points? i.e. Do you adjust each side just to the point where they begin to affect idle speed and then "TwinMax" adjust from that point. In other words...what do I do to return the adjustment to an appropriate position that would get me in to the proper "ballpark" range prior to performing the TwinMax sync?

Post by **iowabeakster** » Mon Oct 02, 2006 12:28 pm

sorry i was goin to post the link to the TB SYnch for dummies, but others have already done that. I take it you have read this instruction and have a "synching" tool. I also take it you, now, understand that idle adjustment is done with the BBBS. (edited after rereading you question above)

Once the throttles are completely seated at idle, this should be almost "ball-park" enough. Remeber you should have some (small amount of) play in the throttle linkage for "safety" reasons.

so yeah, loosen the cables so that the throttles do not affect the idle. then loosen them just a tad more for some safety "play".

this may take awhile, so keep your motor cool with fans!

Post by **Boxer** » Mon Oct 02, 2006 1:23 pm

Just adjust them until each butterfly valve can be heard tapping close with a slight play in the cable. That will get you close.

Hold one cable open as you listen to the other one while turning the throttle. Then adjust-listen-adjust-listen, etc, etc.
Then do the other side. Depending on how good your ears are, you can get damn close this way.

Sunbeemer · Post by **Sunbeemer** » Mon Oct 02, 2006 3:34 pm

NOTE: With regard to the Throttle Body Synching for Dummies article, while I found it extremely helpful while doing mine for the first time this weekend, I think there may be a couple of errors in the sections about adjusting BBAS's and the cables adjusters when the TwinMax needle fails to zero at idle and at higher revs, respectively, but they shouldn't cause you (m)any problems since it's immediately evident when you turn the wrong screws the wrong way! I just kept thinking about what adjustment would be needed to balance the vacuum between the cylinders, which is the point of the article, and it got that across very well.

SLEDGE · Post by **SLEDGE** » Mon Oct 02, 2006 7:32 pm

1 Put a we bit of play in both cables,
2 adjust idle with big brass scews and balance at idle
3 balace at 3,000 to 4,000 rpm with the right cable adjustment only

Keep a fan blowing on the cylinders and oil coolers so it want over heat.
Good Luck

Not Dead Yet · Post by **Not Dead Yet** » Tue Oct 03, 2006 12:57 pm

As usual, everyone was a lot of help. I'm back on track to a finely honed machine. Test ride presented just under 3800 rpm in 6th gear at 70mph. sounds and feels good to me. Thanks for the help.

johno · Post by **johno** » Tue Oct 03, 2006 8:44 pm

I just did mine last night, and what a difference it made!!
BBAS where out a mile, adjusted the right hand cable, all by feel, and my dredded surge has dissappeared

Seems to be less vibration at cruising speeds as well.

Post by **awagnon** » Wed Oct 04, 2006 10:37 pm

There is a series of four service videos on the Adventure website. One is a BMW video showing throttle body sync. on an 1150R. There are also videos on valve adjustment, setting the timing, and adjusting the alternator belt. The link for the AdRider page is: http://www.advrider.com/forums/showthread.php?t=143063

and the URL for the video is: http://www.bmwmc.net/uploads/tm11/R4V%2 ... medium.wmv

I hope these links work. There are some minor differences in the videos from other instruction, such as using a torque wrench to adjust the valves. Also, on the TB Sync. video, substitute the TwinMax for the BMW fancy computer.

Al