Big Bore Kit

[wildbill]

Re: decreasing port size

I have a idea what decreasing ports size would do would be to increase the vacum on the intake side and would proably allow the motor to run better at low to mid. range.Seems like would have to make the exhaust ports bigger to balance it out.This is way over my head so bare with me.Then could use smaller carbs. or if everything checks out stock.I know if you baby a motor just rebuilt,the rings won`t set and the the thing starts useing oil then ,have do it all over again.Run it hard vary speed and keep a eye on the oil{rings usually set in the first 30 to 45 minutes}.Change the oil at or less than 500 miles because this when the most wear occurs{filter to}

[Shuriken]

It sure would be nice to hear from those guys about their theories. They could hire some kid at $5 bucks an hour to spit back canned replies, at a minimum. Why no response at all?

Ben

[wildbill]

Originally posted by ae7f
It sure would be nice to hear from those guys about their theories. They could hire some kid at $5 bucks an hour to spit back canned replies, at a minimum. Why no response at all?

Ben

I agree,don`t know enough,just what I have read.Seems if they want to do business,they would give a response and be willing to answer any questions.This would be a big investment for any of us.Don`t need run arounds or BS May be they don`t know what their doing,just think they do .For those who know,I apolgize,the above was for those who don`t.Changing gears,wouldn`t a big bore kit amplify the good points a xs have?Sounds like a winner if done right.

[turbox79]

my suggestion is go big or go home because stock sucks. thats a joke dont get mad. I have a motor that I chucked a rod out of and have been thinking of trying a 1500cc out of it but haveint had the time my suzuki keeps me busy enough and my turbo xs is so reliable right now.
what is the biggest cc xs motor on this site?
LIST THEM.

[mainlylinux]

I had a wiseco big bore kit in my old '82 Suzuki GS1100. It made a night and day difference.

One of the first times I was riding with the bore kit, I was going down a back road in first gear with another GS1100 next to me. We were both in first gear, rpms on my bike were around 7000, and I was holding her steady. Before the bore kit if I did this and then whacked the throttle open she would sh*t and get.

This time, we both looked at each other and then twisted the throttle.

My handle bars hit me in the chest! @#$$!! thing was in my face and I let go of the throttle....had to change my diapers, and found some new respect :-) Front tire had just completed an unscheduled flight - hehe...

Your mileage with a bore kit may vary....

Dan

[mainlylinux]

Keep in mind that in my previous post I was referring to a GS1100 - a bike well know for it's performance potential. I'm not sure if the XS11 would react the same way.

BTW, in my book the only thing that is really better about a stock GS over a stock XS is the transmission; on the GS it was very slick feeling.

Dan

[Snow]

I would have to agree about the transmission thing - the GS's do have smoother transmissions as far as my limited experiences have shown. I've had a '83 GS750T, '82 GS1100 (G or L I think), and of course my '79 XS11F. I've also ridden my brother's '78 XS11E before he gave it to some scumbag

I do have to admit though, the GS11 just felt weak. It was also a shaftie, but felt like there was nothing there.

[Shuriken]

I also rode a GS1100. My bike pulled much stronger even in the high-wear condition it's in. The GS1100 had a lower seat height and seemed to have less weight though. Perhaps the GS1100 gets its power much higher in the band than the XS.

I am listening though if a GS can pull the front wheel up like that.

I hope I'd really see the difference with the big bore and FI.

I know with my XL500 single cylinder dirt bike, after it was rebuilt I could do 2nd gear wheelies with just throttle. Before that it was much harder to bring the front end up. I think I gained a couple of horses with the rebuild.

I would like to think an XS11 big bore would get the bike back to stock HP and then add 5-7hp increase.

Ben

[mainlylinux]

My GS was in excellent mechanical shape; it also had the following mods: Supertrapp pipe, jet kit, individual filters, and a one tooth smaller than stock fron sprocket. That could be why my GS was stronger. Mix in the bore kit, and it really pulled.

That is the one and only GS1100 I've ever ridden, though I heard from others they were fast. Could be that changes from year to year or overall engine condition might add or detract from the quickness factor.

I'd say my XS1100 is pretty close, but it won't do power wheelies. It will snatch the front tire about 6 inches off the ground on a good 1st-2nd shift though.

Dan

[Shuriken]

I've heard the XS will easily wheelie with passengers..... the weight shift to the rear is probably the cause.

I abused the clutch a few times (and tranny for that matter) by revving the motor and dumping the clutch. The front end bounced.

Now I have a good dunlop on the rear. Before that I had an old slick. I basically burned that tire up at the end of its life by leaving 15ft black marks. I love my new tire. It's a bad day when you are powering out of a turn and feel your crappy back tire sliding sideways.... Nothing like good rubber.

It's amazing to me that my XS with 40k miles on it and fairly heavy ring/valve wear still makes the power that it does. My problem is that leaks and smoke bother me on engines and I end up doing a rebuild.

If I weren't paying tuition right now I'd use my tax return to do the rebuild / big bore kit. I hope when I have the cash the kits are still available. I think they will be but I'm a little worried about valvetrain components....

Ben

[wildbill]

My first xs if you was coming out of the hole would spin 10-15 ft in first,bark or spin a short distance in second and then stand straight up in third.That would give you a real good scare.The bike I have now is stronger in some areas and weaker in others.Better in pulling,worse in gas mileage{45vs40}tracked that down think plug wires are bad,will fix when it warms up.Both bikes would spin on a painted line if you pass someone and cross a line in center of road you know what I mean.Keep the rubber side down.

[Shuriken]

Is that why they call you wild bill? People observed you riding wheelies? Where is that bike, I want it.

Sadly, my 6,660ft altitude is hard to work around when asking for more power.

Ben

[fusionking]

Did anybody notice "motoman" has a new section added on his site now? More break in stuff...mostly about bearings

[wanderersx22002]

I bought my xs11 special from a cycle junk yard. The guy said it was bigger than 1100cc's but didn't know how much, cause the guy who sold it to him said it had a big bore kit in it. I took it home cleaned the gas tank and sealed it. Then took the carbs off and started to clean them when I found some very interesting parts in the carbs. The main jets looked like 110 holly 4bl carb jets. So I bought a stage 3 dyno jet kit and put it in. Also the air jets that were in it were HUGE. Before I changed the jets this thing was awsome. I weigh about 280, my wife weighs about 170. I can ride beside any body [goldwings,Harleys, even some midsize croch rockets, and we've done it in any gear,] this bike just takes off. Fifth gear passing with it loaded can be done with a flick of the wrist and were talking 3 campers,2 cars, and2pickups, all at once. Back off the throttle and its like another brake, the bike slows down real fast. When you crack the throttle wide open at 5000rpm in 5th it will take off like a bullet. Sence its an 81 model the speedo only gos 85, but when my wife ask how fast are we going I yeld at here[don,t know but the tach is at9000 and still climbing!!!] SHE HAD ENOUGH OF THAT. So when I put the stage 3 jet kit in it, it slowed down a little. Anyway, yes get a big bore kit. Riding is so easy with it, an lots of fun. I actully think if ya did every thing right you could out run them big new croch rockets till they cought up with ya, then theyed most likey pass ya.

[wildbill]

Originally posted by ae7f
Is that why they call you wild bill? People observed you riding wheelies? Where is that bike, I want it.

Sadly, my 6,660ft altitude is hard to work around when asking for more power.

Ben

Oh no I have been captured .Actually I have had this nickname from way before I owned my xs.I always liked the power these bikes put out{but would be happy with alot more}.I used to like to lay blackmarks,wheelies were unintentional.I still have the bike,going to fix somethings{plug wires,tires,battery etc.}.Hopefully will be on the road later on. Keep the rubber side down