Throttle and choke assembly

Hello all! My name is Steve and I have recently purchased a 1985 yamaha maxim xj 700 non x. When I first purchased this bike was not running and when I got it started gas was dumping out of the carbs and the engine reved up to the point I killed it before I even looked at the tach. This is my first bike so I am by no means an expert but I have some basic knowledge. Using previous post, great info, I tore down the carbs replaced the needle and seat, all jets, gaskets, and also found the gas leak to be the "T" that the main fuel line connects to at the carb had bad o rings. These were replaced and no more leak! The reason for this post is that after about two weeks of being apart I cannot remember exactly how the throttle and choke assemblies were when I removed them! Rookie mistake but I'm dying to see if the carb clean/rebuild solved my high rev problem! ( also preformed bench sync as per postings here) if not I will take to a bike shop were they can sync them properly for about $200. Anyway anyone have pics of how the choke and throttle hook up to the carbs? Srry for the long post thanks for the info!!!!!!!

 

Welcome to the site Steve !!
Some rookies have a problem where the throttle piece gets trapped under the head during carb installation- - if that happened to you, you have to pull the carbs back to free the "quadrant".
Some people have switched the throttle for the choke cable. . .

DO NOT PAY $200 FOR A CARB SYNC !!

If you did a "bad" bench sync, you will get a racing idle- - you can do a running sync at a high starting idle, but NOT at redline!!
You might need to re-do the bench sync, maybe.

There are many sync threads- -

http://xjbikes.com/Forums/viewtopic/t=22391.html

 

Thanks! I did the bech synch with the business card and followed the instructions to the t so i hope its ok! Thank you for the info, at the top hats i can tell where both the "linkage brackets" were, I just dont know which goes where and how the pieces connect i will try and post a pic of the pieces that i have.

 

Okay, I fired up the bike for the first time without the throttle and choke hooked up and it sounded great! idle steady at 1000rpm, no fuel leakage, purring like a kitten. I still need to hook up the throttle and choke but as a side note when I would manually open the throttle at the carb the bike would die out instead of rev up, almost like the choke was on. I messed with the position of the choke at the carbs but this didnt seem to change anything. Any suggestions? I only have the carb hooked up to the intake boots and not to the boots at the airbox. Thanks for all your help!

 

By not having the intake-to-airbox boots , it's as if you are running pods, but even worse. (see recent POD discussions)

Unless the 700 is different, you fiddle-fart the "bullet" at the end of the cable into the throttle arm or quadrant, then you hang it in the bracket- - it's slotted to make it easy. Do this with the gas tank off.

Are your brackets on the correct way??

 

I did read a couple post on the pods and to much air causing it to idle ok and die with throttle. I will connect those tonight and see. As far as the brackets go I am not exaclty sure if they are the right way, haha I have been tryin to put that puzzle together after work for two days. A friend of mine has a maxim 750 and he looked at my carbs and he said the setup is the same as his so after work today I am gonna go take a look. The airbox being open sounds like the key! I am so pumped to get this on the road, I couldnt do any of this without the advice and wealth of knowledge provided by all who are on this site!!!! Thanks again everyone!

 

I used the pics in the following thread(among others) to reassemble the rack:
It clearly shows where the throttle and "choke" cable routers/holders/thingywingies go:
http://xjbikes.com/Forums/viewtopic/t=1 ... art=0.html

See if the pic will load like this

Sorry for any copyright infringement :wink: 98formulaLS1 posted the original one

 

you are the man!!! i have been searching for this gem of a pic all freakin day!!! I put the airbox boots back on (the biggest pain in the a$$ yet!) and the bike idles perfect great throttle response, almost to good to be true considering my level of experience! On my way with this pic to finish the job and hopefully hit the ground runnin!!!! But in all seriousness I would much much much rather rebuild the carbs ten times over then have to ever fight with them gosh dang boots again!!!!!!!!!!!!!!!!!

 

Well guys, back to the drawing board! I got the throttle and choke hooked up correctly all the boots on bike completely back together fired it up and it revs right to 8 grand before I kill the motor. Hard to understand why because yesterday it idled perfect at 1 grand and would cut out with throttle befor I put the airbox boots back on. As a test just in case i disconnected the throttle and choke and started it and again it reved to 8 grand before I killed it. Not sure what goin on here but the throttle is not the culprit.

 

There's only one way for the engine to rev up: Lot's of air and fuel. Double check that your throttle valves (butterfly valves) are almost completely closed on all four carbs. If they are, you have massive air leaks coupled with carbs that are dripping fuel down the intakes. What did you set the float height at? Did you let them sit withe fuel for a while, then recheck the level? If the floats or float valves are bad they can cause all sorts of troubles. Check your intake manifolds (between carbs and engine) for any cracks.

 

Since it was working fine without the throttle and "choke" cables installed maybe one is pulling its lever? Make sure throttle and "choke" are fully closed (is there some slack in either cable?). Otherwise turn out idle rod adjustment screw a few turns and try starting again?

 

I pulled the carbs again and will try another bench sync in case I did it wrong. One thing I noticed as I pulled them though is there was fuel "puddles" in the grooves of all four intake boots, this is the first time I'm noticing this. I tried the mixture screw between the 2 & 3 carbs all the way out and all the way in and showed zero change. I have read ALOT of threads in the past two days about this same issue and I have a couple of things to check before I take it to a shop. Is there anyone in the eastern pa jersey area that wants to make a few bucks and teach a rookie some pointers? The whole point of this machine was to learn a bike inside and out but I have no previous experience to the point that I could not make any of the tools you guys use for these bikes. I think I may have got I over my head on this one being that there a re four carbs. I got it for $600 bucks and it is in great shape cosmetically so I dove in head first w/out doing the proper research! Thanks to all trying to help round four begins at 3pm est!

 

This is her when I got it, just wanted to share!