Further Adventures In The Carburetor Zone

[Kit]

OK, got that #1 carb onto the old bank and everything moves freely. With all the on and off with these carbs lately, I've decided I've had enough of the airbox. I'm going to order pods on Wednesday.

Question on that, though: I've seen a lot of people say you need to change (increase?) main jet size when doing this, but aside from one post in the mod section, I haven't seen anyone say how far to increase. I'm currently running 120's, and according to the formula in that post, I should increase to 125's. Does that sound right?

Also, I want to make sure I'm looking at the right filters from Mike's XS. This page http://www.mikesxs.net/products-40.html#products 54mm, part # 15-0035. The description doesn't say: do these come with clamps, or will the airbox clamps work?

Anything other than that I need to know?

[cywelchjr]

Good luck on getting pods, last one to try and order pods from MikesXS (the only good ones other than K&N which are really big bucks) was told they won't have any till like Oct or something like that. I know I thought about pods once too, but think about this. Once you put them on, the carbs go in and out a bunch more times and you tune them again. But if you get them right with the airbox, your done with them anyways. And someone had a way to get the airbox further back to make it easier to get the carbs in and out, I'm gonna look it up next time, it has something to do with a mod to the top mount that allowed you to move the box a lot further back.

[bikerphil]

With all the on and off with these carbs lately, I've decided I've had enough of the airbox.

Good trick is cut the snorkel off the air box 1" from it's base. Then get rid of the center bracket altogether. Now your air box can be easily removed out the right side before you remove your carbs. Take the bottom section off first then the top section tilts out. Unfortunatly I discovered this mod after all my carb woes had been solved.

[jwhughes3]

CY - here is what I found..

I searched and found this reference from John (not me) -



There are no vacuum lines to the airbox, but on a 78-79 there are two small carb vent hoses and one large crankcase vent hose attached to the airbox. The carb vents must not be blocked off. You can install a Y type vacuum fitting and a small filter on the end of the fitting, and tie the whole thing up out of the way. The same for the case vent hose. Put a filter in the end of it, and tie it off out of the way. The filters are to allow the yucky stuff out, but keep the critters out of the carbs and crankcase. Personally, I prefer the airbox with an aftermarket filter, either UNI or K&N...your choice. I use the UNI part number NU2244. I have had my carbs off so many times that they are attached with velcro now and I can get them in and out quite quickly. The airbox doesn't need to be removed to get the carbs out. Just remove the lower half of it, and then it can be slid forward a little to get it of the front mount, then push it downand back. it will give you ample clearance to get the carbs out.When they are free of the intake boots, slide them tothe leftto access the throttle cable. It is very easy to remove the cable, and the carbs after that. A little lube on the boots will help during re-assembly. Re-connect the cable the same way you removed it. After a few attempts you'll have it down.


Is this what you remember or was there another way - I am waffling on putting my airbox back into action with a K&N, but damn I can't get it in without pulling the carbs!

Phil - if you eliminate the top bracket, what supports the weight of the airbox?


John

[bikerphil]

Phil - if you eliminate the top bracket, what supports the weight of the airbox?

There are 2 side brackets. 2 holds it up just fine instead of 3.

[motoman]

That's all I ever had to do JW is remove lower portion of air box and filter. With the side bolts removed and top bracket cut off(U don't wanna remove those bracket mout screws going into top of air box), pull off back of carbs, shove down and back.....plenty of room to remove and install carbs. No need to cut snorkel either. From start removing seat and tank takes less than 10min..........just fiddleing and no hurry, 20min. at the worst. Your scoot will be happier with the stock air-box..........and so will you.

[jwhughes3]

I forgot about the side mounts

this CRS is KILLING me!

As much as I hate the thought of chopping on stuff I may just do it - the airboxes are plentiful enough...

+1 on removing the bolts DAMHIKIJK

Thanks
John

[Kit]

Good luck on getting pods, last one to try and order pods from MikesXS (the only good ones other than K&N which are really big bucks) was told they won't have any till like Oct or something like that.

That's unfortunate. Thanks for the heads-up. I'll call them on Wed and see if that's still the case.

Good trick is cut the snorkel off the air box 1" from it's base. Then get rid of the center bracket altogether. Now your air box can be easily removed out the right side before you remove your carbs. Take the bottom section off first then the top section tilts out. Unfortunatly I discovered this mod after all my carb woes had been solved.

I had read about this, but had completely forgotten about it. Thanks for reminding me. I'll have to think a little more about which way I want to go now, but if Mike's doesn't have any available, then the decision will be made for me.

[motoman]

Never had a need to remove the lower portion of airbox,or even "whack" the snorkel just to remove carbs..........Pods?...guess allright if you like the noise, like tinkering with jetting,looks, etc........more power?........ain't happening, and proven so.......certainly not happening with 80model motor up through the XJ series.

[Kit]

Not after more power. Withall the work I've had to do on the carbs over the last few months, on again off again ad nauseum, I just want to make them easier to get to.

[Kit]

Up and running! Got the pod filters last week, but I've been waiting on new boot clamps. Finally got everything I needed and putit all together yesterday. Bear in mind, these are just cheapie no-name little pods. $30 shipped foir all four of them. They will be replaced with the good ones when they are back in stock.

I had an extra upper section of an airbox, so I removed the boots and cut them down. Since the boot tubes are closer to 52mm, I had to wrap them in tape to build them up to the right diameter (seems to me I saw somewhere that someone had to do something similar to theirs).







I had completely forgotten that I need to put a filter on the breather hose until someone reminded me, so after running around like a bull in a china shop at the last minute this morning, this is what I ended up with.




I cut a small piece off my spare breather hose, the same length as the two male ends, so they join right up against each other without flexing. This way, I don't have to worry about trying to fasten the thing down or listen to it rattle around or anything, so it worked out nicely




After that, I tuned and synced the carbs, then took her out for about 105 miles. And holy <beep>, did she run! I giggled like a school girl the first 5 miles down the road to the gas station. No more cutting out at 4000 rpm. Power all the way through. Took her through straightaways, hills, twisties, and combinations of the above. Handled beautifully through all of it. Towards the end of the ride, she started to pop and backfire in 1st gear until I got the RPMs up. I remember somebody said that after rebuilding carbs they will need to be re-synced after the initial sync and test ride. So tomorrow morning I will do that, and take her out again. I'm optimistic that that's all it is.

Stopped at a little view point just south of Silver Falls State Park for a photo op.

[Kit]

Regarding the popping and backfiring, I just read Motoman's post in this thread: http://www.xs11.com/forum/showthread...ht=pilot+screw
I'll check the timing tomorrow, too.

[TopCatGr58]

Welcome to the DARK SIDE!

Hey Kit,

Glad to hear that your bike responded well to the PODS, your intake tube mod is a big part of having those inexpensive pods work with our bike. You can try turning out the pilot SCREWs a 1/2 turn each and retest the ride and the decel popping, but it's a bit more common with a lean jetting condition, moreso with aftermarket pipes...but you have the OEM's.

As for the MikesXS pods...Partsnmore.com also sells them, but you have to select YAMAHA, then XS1100, and then click on UNIVERSAL parts before they will be shown on the first page of parts.

Chrome Cap Air Filter #15-0035
Chrome Cap Air Filter (54mm) Oval Type Filter is supplied dry but washable filtration material may be oiled for improved dust filtration
US$ 13.00 EACH.

I think you'll find out if they have them in stock when you put them in your cart! Okay, I just checked it and it didn't give any warning that they were OUT OF STOCK!

T.C.

[Kit]

Excellent, and they're less expensive than Mike's too. Thanks!

[motoman]

Looks good.............just get rid of that dismal check/fill plug on the middle drive!.......True-Valu gots a real nice looking one with a nice fittin' thick fiber gasket, 14mmx1.50...check it out for bout 3bucks. Haven't swapped out the rear one yet as I gotta see if the narrower gasket gasket will fit the recess in the check/fill hole first. If it does, would have to double them up since the replacement plug has a larger outer surface, which is the same as sealing surface. Nice to just throw a 13mm box-end wrench on it to remove...