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Old 03-17-2012, 07:40 PM
mrbisbob mrbisbob is offline
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Check out my XS1100 Chain Drive

Hey everybody, I have been lurking here for a couple years now and love the site. I think its one of the best and most informative out there of any bike type not just the XS. I became an XS fan back in 2009 when a friend of mine gave me my 79 XS1100 Special. I have had lots of other bikes, mainly sportbikes since the mid 80's when I started riding while seving in the US Army. I didn't think much of the XS until I had one running under me and I am now an enthusiast. It has some awesome technical innovations at a very early time and of course it is strong in the Force. I love how torquey and flexible the motor is and as a former performance tuner it has a huge amount of untapped potential which is just the way I like my own projects to be. Kind of like a blank canvas. Anyway back in 2009 I bought a chain drive conversion from xschop but then had to sell it without having ever used it. The pictures that hopefully will follow detail my progress at making one myself.





















The next step now is to execute the program in the CNC machine on the 13 pound cube of 6061 T6 that I have.
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79 XS1100 "Velvet Hammer"
Progressive springs, MAC 4-1 with modified glass pack thrush 2" baffle inside megaphone, 80 carbs with Dynojet kit and K&N's, Ported & Polished head soon (it's what I do)

87 FZ700/ YZR500 replica in progress
93 GS500/ 851cc stroker superlight in progress

Last edited by mrbisbob; 03-17-2012 at 07:50 PM.
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Old 03-18-2012, 07:53 AM
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trbig trbig is offline
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CNC machines = magic to me.. much like electricity. lol. I'm more the "If it don't work, hit it with a bigger hammer" type.

Though there may be some sort of Copyright thing, Yamaha's tuning fork emblem somewhere on there would be cool. But hoestly, it looks pretty dang sexy as it sits.

So, since Chop quit building these, are you in the market to make more than just this one? And if so, do you have an estimated final cost? Seems a lot of work to go through for the programing and molds to just do one. Me? I prefer the shaft drive, but I know you'll get a lot more power to the ground with the chain, and many like the idea. Plus, you can play around with sprocket sizes and get the gearing how you want it. Quarter mile runs one weekend, then a quick sprocket change and you're good for the open highway.
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You can live to be 100, as long as you give up everything that would make you want to live to be 100!

Current bikes:
'06 Suzuki DR650
*'82 XJ1100 with the 1179 kit. "Mad Maxim"
'82 XJ1100 Completely stock fixer-upper
'82 XJ1100 Bagger fixer-upper
'82 XJ1100 Motor/frame and lots of boxes of parts
'82 XJ1100 Parts bike
'81 XS1100 Special
'81 YZ250
'80 XS850 Special
'80 XR100
*Crashed/Totalled, still own

Last edited by trbig; 03-18-2012 at 07:55 AM.
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  #3  
Old 03-18-2012, 09:42 AM
mrbisbob mrbisbob is offline
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Estimated cost for chain drive

Thanks for the feedback trbig. Yes I would consider making more and have thought about a price. I would be happy to reproduce them at $600 each like xschop was. This next week I will be trying to complete the first one in T6 on the machine so more pics will follow as I progress. Here is a pic of what it will be rotating and a rough idea of the window dressing. I'm a huge fan of early 80's euro sport bikes so I am trying to build my XS as a kind of Honda CB1100R answer by Yamaha an XS1100R if you will. I have high hopes it will turn out like the pictures in my mind. I have already ported the head to coax more power from the mighty XS mill. The ports are actually some of the best designed 2 valve ports I have ever seen, especially when you consider the fact that they had them in 1978. The combustion chambers are awesome too. Sometimes it's rough being a perfectionist.






I made the clevises on the CNC machine too.












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79 XS1100 "Velvet Hammer"
Progressive springs, MAC 4-1 with modified glass pack thrush 2" baffle inside megaphone, 80 carbs with Dynojet kit and K&N's, Ported & Polished head soon (it's what I do)

87 FZ700/ YZR500 replica in progress
93 GS500/ 851cc stroker superlight in progress

Last edited by mrbisbob; 03-18-2012 at 09:46 AM.
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Old 03-18-2012, 11:35 AM
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WSL91 WSL91 is offline
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Nice work!
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1970? Honda Z50... gone
1974? Yamaha 100 Enduro... gone
1974 Honda CB200... gone
1981 Yamaha Virago 750... gone
1993 Honda Shadow 1100... gone
2008 Honda VTX 1800F
1982 Yamaha XJ1100J w/850 final, Raptor ACCT
1979 Yamaha XS1100SF "Chewey" Raptor ACCT

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Old 03-18-2012, 12:04 PM
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trbig trbig is offline
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Are you doing flow tests on that head?
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Try your hardest to be the kind of person your dog thinks you are.

You can live to be 100, as long as you give up everything that would make you want to live to be 100!

Current bikes:
'06 Suzuki DR650
*'82 XJ1100 with the 1179 kit. "Mad Maxim"
'82 XJ1100 Completely stock fixer-upper
'82 XJ1100 Bagger fixer-upper
'82 XJ1100 Motor/frame and lots of boxes of parts
'82 XJ1100 Parts bike
'81 XS1100 Special
'81 YZ250
'80 XS850 Special
'80 XR100
*Crashed/Totalled, still own
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  #6  
Old 03-18-2012, 05:19 PM
mrbisbob mrbisbob is offline
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Don't have a flow bench, however do have 13 years experience porting heads and half of that was with a flow bench chasing airflow numbers.
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79 XS1100 "Velvet Hammer"
Progressive springs, MAC 4-1 with modified glass pack thrush 2" baffle inside megaphone, 80 carbs with Dynojet kit and K&N's, Ported & Polished head soon (it's what I do)

87 FZ700/ YZR500 replica in progress
93 GS500/ 851cc stroker superlight in progress
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  #7  
Old 03-25-2012, 09:15 AM
mrbisbob mrbisbob is offline
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Billet Chain Drive progress

Here is some progress on the first chain drive prototype.











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79 XS1100 "Velvet Hammer"
Progressive springs, MAC 4-1 with modified glass pack thrush 2" baffle inside megaphone, 80 carbs with Dynojet kit and K&N's, Ported & Polished head soon (it's what I do)

87 FZ700/ YZR500 replica in progress
93 GS500/ 851cc stroker superlight in progress
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Old 03-25-2012, 10:15 AM
tom clisham tom clisham is offline
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Very impressive!

Now, where did you get that cool fairing?
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Age is relative YOU WON"T GET OLD TIL YOU SELL THE BIKE
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'78xs1100E ,all stock & original GONE TO WISCONSIN

'80 SG Vetter fairing,hard bags,trunk,fork brace,
stock headers with fishtail mufflers,black & beautiful GONE TO ARIZONA

79SF lowered,jardine 4/2 exhaust,pod filters,drilled rotors,fork brace, bar hopper

79SF 1 owner,8000 miles, restoring to completely original ( I hope) GONE TO FRANCE
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Old 03-25-2012, 11:51 AM
Cuda 69 Cuda 69 is offline
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very nice work,but I have no idea why someone would change to chain drive when driveshaft has been so reliable for so many years. Always trying to learn, I'm guessing for cornering? does it give more hp to the rear wheel? John
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2009 Suzuki V Strom 650,Adventure in Touring,I call her "Smooth" SW Motech engine guard,Coocase top case w/ LED brake and tail lights,20" MRA touring screen w/adjusable bracket,Grip heaters,fender ex-tender,Givi hard sidebags

1980 XS11SG-sold
1999 Vulcan classic-sold
1982 XJ 650-sold

Old is only a state of mind......John
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  #10  
Old 03-25-2012, 11:59 AM
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natemoen natemoen is offline
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Quote:
Originally Posted by Cuda 69 View Post
very nice work,but I have no idea why someone would change to chain drive when driveshaft has been so reliable for so many years. Always trying to learn, I'm guessing for cornering? does it give more hp to the rear wheel? John
Supposedly you loose 10-15% HP through the shaft and nowhere near that from the chain drive. Also it is much easier to change drive ratios with chain drives.
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KD9ARL

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1978 XS1100E
K&N Filter
#45 pilot Jet, #137.5 Main Jet
OEM Exhaust
ATK Fork Brace
LED Dash lights
Ammeter, Oil Pressure, Oil Temp, and Volt Meters

Green Monster Coils
SS Brake Lines
Vision 550 Auto Tensioner

In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

Theodore Roosevelt
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  #11  
Old 03-26-2012, 07:53 AM
mrbisbob mrbisbob is offline
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Modern Rubber

The primary reason for me is better tire selection, and then there is more HP to the rear wheel. Plus I'm an incurable tinkerer. I love the older universal japanese motorcycles like the XS11 because they are like a blank canvas to me, full of potential to be what you want them to be. Today's bikes are so specialized that it's much harder to express your individuality IMHO. I had to change to chain drive so I could put a different swingarm and wider rear wheel on the back. I would leave it as is if I were long distance touring with it but I am a corner enthusiast and I love having unusual difficult to identify motorcycles to do my scratching on. I live right in the middle of some of the best roads on the east coast. The Blue Ridge Parkway is 20 miles from my doorstep and I kept dragging metal parts in the curves when I was out playing before. The fairing is from a Honda CBX 6. It's like a lot of the Hondaline accessory fairings from the early 80's bikes. I like it because it's a lot like the european CB1100R fairing. The tail section actually is a fiberglass replica of a CB1100RB.
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79 XS1100 "Velvet Hammer"
Progressive springs, MAC 4-1 with modified glass pack thrush 2" baffle inside megaphone, 80 carbs with Dynojet kit and K&N's, Ported & Polished head soon (it's what I do)

87 FZ700/ YZR500 replica in progress
93 GS500/ 851cc stroker superlight in progress
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Old 03-26-2012, 08:13 AM
daveyg daveyg is offline
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Lookin awesome! Keep up the great work! I would do the same but I don't have enough seniority at my shop to play with the big toys after hours yet. Right now I'm lucky they let me use the little hardinge lathe when nobody is around.
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Old 03-26-2012, 12:12 PM
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fredintoon fredintoon is offline
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Quote:
Originally Posted by Cuda 69 View Post
very nice work,but I have no idea why someone would change to chain drive when driveshaft has been so reliable for so many years. Always trying to learn, I'm guessing for cornering? does it give more hp to the rear wheel? John
Hi Cuda,
chain drive costs less, weighs less and has better efficiency so long as it's not worn and it's properly maintained and lubricated.
Shafties weigh more, cost more and have a consistent though slightly less long term efficiency and need far less maintenance.
There are handling differences that only extreme riders would find a problem with.
I ride like a timid old man because I am one and while the shaftie's climb-on-acceleration is noticeable it's nothing to worry about.
The chain conversion shown above has to be a labour of love, it'll never make a profit.
As elegantly as it's been done here, I'd worry about the 13T sprocket size.
I reckon a good sprocket size would be 17T and put 15T as a minimum.
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Old 03-26-2012, 04:39 PM
'OlGuiltyBoy 'OlGuiltyBoy is offline
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Yea, you'd have to run at least a 15T. And that's even going to have you changing it quite often, but still not an expensive thing to do. I wanted to get one myself, but I'm not putting any more money into that bike. Just not worth it right now IMO. At least mine is not worth it.
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  #15  
Old 03-26-2012, 08:34 PM
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fredintoon fredintoon is offline
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Quote:
Originally Posted by 'OlGuiltyBoy View Post
Yea, you'd have to run at least a 15T. And that's even going to have you changing it quite often, but still not an expensive thing to do. I wanted to get one myself, but I'm not putting any more money into that bike. Just not worth it right now IMO. At least mine is not worth it.
Hi 'OlGuiltyBoy,
as I understand it, the chain drive conversion puts the output shaft so close to the transmission case casting that a 13T sprocket is the biggest that will fit.
Even if I had the money, time, skill and enthusiasm to do the conversion that tiny sprocket would kill the deal for me.
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