Discussion in 'XJ Technical Chat' started by Cutlass84, Jun 4, 2007.
Did the bracket fit the carb? Or did you twist it like that?
That bracket is a duplicate idle speed screw bracket from a junk set of BS28 carbs. Yes, I twisted/bent it. The screw extender came from ebay with no means of attaching it so I improvised.
I'm sure it's from a later year Yamaha that had Mikunis. I'm doubtful it was off a FZR750 because they ran Keihin carbs mostly and the carbs were covered by a fake gas tank plenum. Who knows?
I knew the screw threads were the same so I snagged it for $12.00. I have trouble accessing the idle speed screw in its usual location plus it gets pretty toasty there also.
Works great for me.
NO! I don't like that idle screw at all! ... because I put my carbs back on a couple weeks ago, and now I wanna do that!
Pull them off the bike and install one. There are at least a dozen on ebay right now for sale. I just looked, seriously.
Pulling and reinstalling the carbs gets easier each time you do it, once you figure which way works best for you. You got this....
New throttle shaft seals did not help with hard starting when cold.
Check your valve adjustment, make sure your getting good spark, is your battery charged up completely and if it's really really cold where you live these bikes can be real twats until they are warmed up.
I will say I think I did get an improvement when the choke is off. Mine has never run for any duration with full choke. But now when I use the choke a few times then go without it I notice a longer very slow run as it is trying to warm up and I can lightly dial in some throttle. Yes cold here.
Sounds like you might have a vacuum leak or a screwy enrichment plunger. Something along those lines. The first thing to do is check your spark plug color and that will tell you a bunch of info. Without seeing the plugs, I'll venture a guess that your bike is a little on the lean side from what you've told us. Pull the plugs, get a new set and fiddle a bit with your mixture ratios or Colortune. If you don't have a Colortune, get one.
My finicky cold start issue went to starts with no or little choke after I bought a Colortune. Also I was surprised how much the mixture screw settings varied between each other.
\What does Rick charge for the carb rebuild?
Got some ME time today and got everything 99% put back together.
Larry, that looks awesome! Saw your other thread where you got some ride time on it.
Wish I had more time to document all the stuff I've done or plan on doing.
In the meantime, here's a snap shot of the parts bike build after my 20 mile shake down run today:
I do have the "5 Valve" carb and airbox trim pieces. I'll be installing those after the final jetting when the weather gets warmer.
One of these days I'll do a build thread with close ups and details on all the mods and improvements.
Your ride is undoubtedly very nice. Great work on keeping it up.
Let us in on what work you have done.
Its always interesting to see what others are doing to there bikes XJs or not.
Rainy day here so I spent it doing what was sorely needed...
I have the same one... warning, I had to tuck it farther up under the tank as the seat was pushing hard on the top of it even with the plastic plate removed from the seat.
hmm ill keep an eye on it. seemed like there was enough clearance to not have issues, ive heard of people also using seat spacers to lift the seat a few mm
* Update *
Regarding the extended throttle adjustment knob installed during my carb overhaul:
The mounting point off the carb bowl screw didn't work out. It also created a conflict when reinstalling the carbs.
With the same mounting bracket flatten out and a larger diameter hole, the upper starter mounting bolt was replaced with a slightly longer one and the knob fits there nicely. Pulling and installing the carbs is not an issue with this mounting point. Just let it hang until the carbs are secured then install the bolt back on the starter. The idle is easily tweaked here, if needed.
Just came home 50 degrees, started bike up , been sitting for a few weeks . I WANT to ride , but have bike tucked on side wall just right to get my truck in garage...must resist now if we get no real snow for rest of winter
Hit 45 here today...if it wasnt for all the salt on the roads I would have pulled it off the breezeway and went for a rip
Yes l don't mind the cold but the road salt is bad. Hopefully winter will be mild time will tell.